Merge remote-tracking branch 'origin/master' into 3.3.x

.gitignore

@@ -93,21 +93,6 @@ samples/client/petstore/java/jersey2-java6/project/
 samples/client/petstore/java/jersey2-java8/project/
 samples/client/petstore/java/jersey2/project/
 
-#PHP
-samples/client/petstore/php/OpenAPIToolsClient-php/composer.lock
-samples/client/petstore/php/OpenAPIToolsClient-php/vendor/
-samples/client/petstore/silex/SwaggerServer/composer.lock
-samples/client/petstore/silex/SwaggerServer/venodr/
-**/vendor/
-**/composer.lock
-
-#PHP-Symfony
-samples/server/petstore/php-symfony/SymfonyBundle-php/Tests/cache/
-samples/server/petstore/php-symfony/SymfonyBundle-php/Tests/logs/
-
-#PHP-laravel
-samples/server/petstore/php-laravel/node_modules
-
 # Perl
 samples/client/petstore/perl/deep_module_test/
 

.hub.cli.dockerfile

@@ -0,0 +1,36 @@
+## The builder labeled image acts as a transient container which is meant to
+## hold all non-artifact code.
+##
+## You can build _just_ this part with:
+##     docker --target builder -t container-name:builder -f .hub.cli.dockerfile .
+FROM jimschubert/8-jdk-alpine-mvn:1.0 as builder
+
+RUN set -x && \
+    apk add --no-cache bash
+
+ENV GEN_DIR /opt/openapi-generator
+WORKDIR ${GEN_DIR}
+COPY . ${GEN_DIR}
+
+# Pre-compile openapi-generator-cli
+RUN mvn -am -pl "modules/openapi-generator-cli" package
+
+## The final (release) image
+## The resulting container here only needs the target jar
+## and ca-certificates (to be able to query HTTPS hosted specs)
+FROM openjdk:8-jre-alpine
+
+ENV GEN_DIR /opt/openapi-generator
+
+RUN apk --no-cache add ca-certificates bash
+RUN mkdir -p ${GEN_DIR}/modules/openapi-generator-cli/target
+
+WORKDIR ${GEN_DIR}/modules/openapi-generator-cli/target
+
+COPY --from=builder ${GEN_DIR}/modules/openapi-generator-cli/target/openapi-generator-cli.jar ${GEN_DIR}/modules/openapi-generator-cli/target/openapi-generator-cli.jar
+
+COPY docker-entrypoint.sh /usr/local/bin/
+
+ENTRYPOINT ["docker-entrypoint.sh"]
+
+CMD ["help"]

.hub.online.dockerfile

@@ -0,0 +1,35 @@
+## The builder labeled image acts as a transient container which is meant to
+## hold all non-artifact code.
+##
+## You can build _just_ this part with:
+##     docker --target builder -t container-name:builder -f .hub.online.dockerfile .
+FROM jimschubert/8-jdk-alpine-mvn:1.0 as builder
+
+RUN set -x && \
+    apk add --no-cache bash
+
+ENV GEN_DIR /opt/openapi-generator
+WORKDIR ${GEN_DIR}
+COPY . ${GEN_DIR}
+
+# Pre-compile openapi-generator-online
+RUN mvn -am -pl "modules/openapi-generator-online" package
+
+## The final (release) image
+## The resulting container here only needs the target jar
+FROM openjdk:8-jre-alpine
+
+ENV GEN_DIR /opt/openapi-generator
+ENV TARGET_DIR /generator
+
+RUN mkdir -p ${TARGET_DIR}
+
+WORKDIR ${TARGET_DIR}
+
+COPY --from=builder ${GEN_DIR}/modules/openapi-generator-online/target/openapi-generator-*.jar ${TARGET_DIR}/openapi-generator-online.jar
+
+ENV GENERATOR_HOST=http://localhost
+
+EXPOSE 8080
+
+CMD ["java", "-jar", "/generator/openapi-generator-online.jar"]

.travis.yml

@@ -31,6 +31,8 @@ cache:
   - $HOME/.cargo
   - $HOME/.stack
   - $HOME/samples/server/petstore/cpp-pistache/pistache
+  - $HOME/.npm  
+  - $HOME/.rvm/gems/ruby-2.4.1
 
 services:
   - docker
@@ -57,7 +59,7 @@ before_install:
   - gem install bundler
   - npm install -g typescript
   - npm install -g npm
-  - npm install -g elm
+  - npm install -g elm@0.18.0-exp5
   - npm config set registry http://registry.npmjs.org/
   # set python 3.6.3 as default
   - source ~/virtualenv/python3.6/bin/activate

CI/samples.ci/client/petstore/java/test-manual/jersey1/ApiClientTest.java

@@ -28,7 +28,7 @@ public class ApiClientTest {
         assertEquals(dateStr, apiClient.formatDate(apiClient.parseDate("2015-11-07T02:49:09.356-01:00")));
 
         // custom date format: without milli-seconds, custom time zone
-        DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
+        DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ROOT);
         format.setTimeZone(TimeZone.getTimeZone("GMT+10"));
         apiClient.setDateFormat(format);
         dateStr = "2015-11-07T13:49:09+10:00";

CI/samples.ci/client/petstore/java/test-manual/jersey2/ApiClientTest.java

@@ -28,7 +28,7 @@ public class ApiClientTest {
         assertEquals(dateStr, apiClient.formatDate(apiClient.parseDate("2015-11-07T02:49:09.356-01:00")));
 
         // custom date format: without milli-seconds, custom time zone
-        DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
+        DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ROOT);
         format.setTimeZone(TimeZone.getTimeZone("GMT+10"));
         apiClient.setDateFormat(format);
         dateStr = "2015-11-07T13:49:09+10:00";

CI/samples.ci/client/petstore/java/test-manual/okhttp-gson/JSONTest.java

@@ -12,6 +12,7 @@ import java.text.SimpleDateFormat;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.GregorianCalendar;
+import java.util.Locale;
 import java.util.TimeZone;
 
 import okio.ByteString;
@@ -46,7 +47,7 @@ public class JSONTest {
         assertEquals(json.deserialize("\"2015-11-07T03:49:09.356" + getCurrentTimezoneOffset() + "\"", java.sql.Date.class).toString(), date.toString());
 
         // custom date format: without day
-        DateFormat format = new SimpleDateFormat("yyyy-MM");
+        DateFormat format = new SimpleDateFormat("yyyy-MM", Locale.ROOT);
         apiClient.setSqlDateFormat(format);
         String dateStr = "\"2015-11\"";
         assertEquals(dateStr, json.serialize(json.deserialize("\"2015-11-07T03:49:09Z\"", java.sql.Date.class)));
@@ -79,7 +80,7 @@ public class JSONTest {
         assertEquals(utcDate, json.serialize(date));
 
         // custom datetime format: without milli-seconds, custom time zone
-        DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
+        DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ROOT);
         format.setTimeZone(TimeZone.getTimeZone("GMT+10"));
         apiClient.setDateFormat(format);
 
@@ -190,10 +191,10 @@ public class JSONTest {
     public static String getCurrentTimezoneOffset() {
 
         TimeZone tz = TimeZone.getDefault();
-        Calendar cal = GregorianCalendar.getInstance(tz);
+        Calendar cal = GregorianCalendar.getInstance(tz, Locale.ROOT);
         int offsetInMillis = tz.getOffset(cal.getTimeInMillis());
 
-        String offset = String.format("%02d:%02d", Math.abs(offsetInMillis / 3600000), Math.abs((offsetInMillis / 60000) % 60));
+        String offset = String.format(Locale.ROOT,"%02d:%02d", Math.abs(offsetInMillis / 3600000), Math.abs((offsetInMillis / 60000) % 60));
         offset = (offsetInMillis >= 0 ? "+" : "-") + offset;
 
         return offset;

CI/samples.ci/client/petstore/java/test-manual/resttemplate/ApiClientTest.java

@@ -34,7 +34,7 @@ public class ApiClientTest {
         assertEquals(dateStr, apiClient.formatDate(apiClient.parseDate("2015-11-07T02:49:09.356-01:00")));
 
         // custom date format: without milli-seconds, custom time zone
-        DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");
+        DateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX", Locale.ROOT);
         format.setTimeZone(TimeZone.getTimeZone("GMT+10"));
         apiClient.setDateFormat(format);
         dateStr = "2015-11-07T13:49:09+10:00";

README.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-[Master](https://github.com/OpenAPITools/openapi-generator/tree/master) (`3.2.2`): [![Build Status](https://img.shields.io/travis/OpenAPITools/openapi-generator/master.svg?label=Integration%20Test)](https://travis-ci.org/OpenAPITools/openapi-generator)
+[Master](https://github.com/OpenAPITools/openapi-generator/tree/master) (`3.2.3`): [![Build Status](https://img.shields.io/travis/OpenAPITools/openapi-generator/master.svg?label=Integration%20Test)](https://travis-ci.org/OpenAPITools/openapi-generator)
 [![Integration Test2](https://circleci.com/gh/OpenAPITools/openapi-generator.svg?style=shield)](https://circleci.com/gh/OpenAPITools/openapi-generator)
 [![Run Status](https://api.shippable.com/projects/5af6bf74e790f4070084a115/badge?branch=master)](https://app.shippable.com/github/OpenAPITools/openapi-generator)
 [![Windows Test](https://ci.appveyor.com/api/projects/status/github/openapitools/openapi-generator?branch=master&svg=true&passingText=Windows%20Test%20-%20OK&failingText=Windows%20Test%20-%20Fails)](https://ci.appveyor.com/project/WilliamCheng/openapi-generator-wh2wu)
@@ -84,8 +84,8 @@ OpenAPI Generator Version    | Release Date | Notes
 ---------------------------- | ------------ | -----
 4.0.0 (upcoming major release) [SNAPSHOT](https://oss.sonatype.org/content/repositories/snapshots/org/openapitools/openapi-generator-cli/4.0.0-SNAPSHOT/)| TBD | Major release with breaking changes (no fallback)
 3.3.0 (upcoming minor release)| TBD | Minor release (breaking changes with fallbacks)
-3.2.2 (current master, upcoming patch release) [SNAPSHOT](https://oss.sonatype.org/content/repositories/snapshots/org/openapitools/openapi-generator-cli/3.2.2-SNAPSHOT/)| TBD | Bugfix release
+3.2.3 (current master, upcoming patch release) [SNAPSHOT](https://oss.sonatype.org/content/repositories/snapshots/org/openapitools/openapi-generator-cli/3.2.3-SNAPSHOT/)| TBD | Bugfix release
-[3.2.1](https://github.com/OpenAPITools/openapi-generator/releases/tag/v3.2.1) (latest stable release) | 14.08.2018 | Bugfix release
+[3.2.2](https://github.com/OpenAPITools/openapi-generator/releases/tag/v3.2.2) (latest stable release) | 22.08.2018 | Bugfix release
 
 OpenAPI Spec compatibility: 1.0, 1.1, 1.2, 2.0, 3.0
 
@@ -141,16 +141,16 @@ See the different versions of the [openapi-generator-cli](https://mvnrepository.
 
 If you're looking for the latest stable version, you can grab it directly from Maven.org (Java 8 runtime at a minimum):
 
-JAR location: `http://central.maven.org/maven2/org/openapitools/openapi-generator-cli/3.2.1/openapi-generator-cli-3.2.1.jar`
+JAR location: `http://central.maven.org/maven2/org/openapitools/openapi-generator-cli/3.2.2/openapi-generator-cli-3.2.2.jar`
 
 For **Mac/Linux** users:
 ```sh
-wget http://central.maven.org/maven2/org/openapitools/openapi-generator-cli/3.2.1/openapi-generator-cli-3.2.1.jar -O openapi-generator-cli.jar
+wget http://central.maven.org/maven2/org/openapitools/openapi-generator-cli/3.2.2/openapi-generator-cli-3.2.2.jar -O openapi-generator-cli.jar
 ```
 
 For **Windows** users, you will need to install [wget](http://gnuwin32.sourceforge.net/packages/wget.htm) or you can use Invoke-WebRequest in PowerShell (3.0+), e.g.
 ```
-Invoke-WebRequest -OutFile openapi-generator-cli.jar http://central.maven.org/maven2/org/openapitools/openapi-generator-cli/3.2.1/openapi-generator-cli-3.2.1.jar
+Invoke-WebRequest -OutFile openapi-generator-cli.jar http://central.maven.org/maven2/org/openapitools/openapi-generator-cli/3.2.2/openapi-generator-cli-3.2.2.jar
 ```
 
 After downloading the JAR, run `java -jar openapi-generator-cli.jar help` to show the usage.
@@ -163,7 +163,7 @@ export PATH=${JAVA_HOME}/bin:$PATH
 
 ### Launcher Script
 
-One downside to manual jar downloads is that you don't keep up-to-date with the latest released version. We have a Bash launcher script at [bin/utils/openapi-generator.cli.sh](./bin/utils/openapi-generator.cli.sh) which resolves this issue.
+One downside to manual jar downloads is that you don't keep up-to-date with the latest released version. We have a Bash launcher script at [bin/utils/openapi-generator.cli.sh](./bin/utils/openapi-generator-cli.sh) which resolves this issue.
 
 To install the launcher script, copy the contents of the script to a location on your path and make the script executable.
 
@@ -406,13 +406,14 @@ SYNOPSIS
                 [--invoker-package <invoker package>]
                 [(-l <language> | --lang <language>)]
                 [--language-specific-primitives <language specific primitives>...]
-                [--library <library>] [--model-name-prefix <model name prefix>]
+                [--library <library>] [--log-to-stderr]
+                [--model-name-prefix <model name prefix>]
                 [--model-name-suffix <model name suffix>]
                 [--model-package <model package>]
                 [(-o <output directory> | --output <output directory>)]
                 [--release-note <release note>] [--remove-operation-id-prefix]
                 [--reserved-words-mappings <reserved word mappings>...]
-                [(-s | --skip-overwrite)]
+                [(-s | --skip-overwrite)] [--skip-validate-spec]
                 [(-t <template directory> | --template-dir <template directory>)]
                 [--type-mappings <type mappings>...] [(-v | --verbose)]
 
@@ -472,6 +473,7 @@ Here are some companies/projects (alphabetical order) using OpenAPI Generator in
 - [Raiffeisen Schweiz Genossenschaft](https://www.raiffeisen.ch)
 - [RepreZen API Studio](https://www.reprezen.com/swagger-openapi-code-generation-api-first-microservices-enterprise-development)
 - [REST United](https://restunited.com)
+- [Suva](https://www.suva.ch/)
 - [Telstra](https://dev.telstra.com)
 - [unblu inc.](https://www.unblu.com/)
 
@@ -482,7 +484,7 @@ Here are some companies/projects (alphabetical order) using OpenAPI Generator in
 - 2018/05/15 - [REST API仕様からAPIクライアントやスタブサーバを自動生成する「OpenAPI Generator」オープンソースで公開。Swagger Codegenからのフォーク](https://www.publickey1.jp/blog/18/rest_apiapiopenapi_generatorswagger_generator.html) by [Publickey](https://www.publickey1.jp)
 - 2018/06/08 - [Swagger Codegen is now OpenAPI Generator](https://angular.schule/blog/2018-06-swagger-codegen-is-now-openapi-generator) by [JohannesHoppe](https://github.com/JohannesHoppe)
 - 2018/06/21 - [Connect your JHipster apps to the world of APIs with OpenAPI and gRPC](https://fr.slideshare.net/chbornet/jhipster-conf-2018-connect-your-jhipster-apps-to-the-world-of-apis-with-openapi-and-grpc) by [Christophe Bornet](https://github.com/cbornet) at [JHipster Conf 2018](https://jhipster-conf.github.io/)
-- 2018/06/27 - [Lessons Learned from Leading an Open-Source Project Supporting 30+ Programming Languages](https://speakerdeck.com/wing328/lessons-learned-from-leading-an-open-source-project-supporting-30-plus-programming-languages) - [William Cheng](https://github.com/wing328) at [LinuxCon + ContainerCon + CloudOpen China 2018](https://www.lfasiallc.com/events/lc3-2018/)
+- 2018/06/27 - [Lessons Learned from Leading an Open-Source Project Supporting 30+ Programming Languages](https://speakerdeck.com/wing328/lessons-learned-from-leading-an-open-source-project-supporting-30-plus-programming-languages) - [William Cheng](https://github.com/wing328) at [LinuxCon + ContainerCon + CloudOpen China 2018](http://bit.ly/2waDKKX)
 - 2018/07/19 - [OpenAPI Generator Contribution Quickstart - RingCentral Go SDK](https://medium.com/ringcentral-developers/openapi-generator-for-go-contribution-quickstart-8cc72bf37b53) by [John Wang](https://github.com/grokify)
 
 ## [6 - About Us](#table-of-contents)

bin/security/silex-petstore-server.sh

@@ -27,6 +27,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -XX:MaxPermSize=256M -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="generate -t modules/openapi-generator/src/main/resources/php-silex -i modules/openapi-generator/src/test/resources/2_0/petstore-security-test.yaml -g php-silex -o samples/server/petstore-security-test/silex $@"
+ags="generate -t modules/openapi-generator/src/main/resources/php-silex -i modules/openapi-generator/src/test/resources/2_0/petstore-security-test.yaml -g php-silex -o samples/server/petstore-security-test/silex/SwaggerServer $@"
 
 java $JAVA_OPTS -jar $executable $ags

bin/utils/ensure-up-to-date

@@ -10,7 +10,7 @@ echo "Please press CTRL+C to stop or the script will continue in 5 seconds."
 sleep 5
 
 # LIST OF SCRIPTS:
-./bin/ruby-petstore.sh > /dev/null 2>&1
+./bin/ruby-client-petstore.sh > /dev/null 2>&1
 ./bin/java-petstore-all.sh > /dev/null 2>&1
 ./bin/java-jaxrs-petstore-server-all.sh > /dev/null 2>&1
 ./bin/spring-all-pestore.sh > /dev/null 2>&1

docs/customization.md

@@ -35,6 +35,8 @@ These names can be anything you like. If you are building a client for the white
 
 **NOTE** Convention is to use kebab casing for names passed to `-n`. Example, `scala-finatra` would become `ScalaFinatraGenerator`.
 
+#### Use your new generator with the CLI
+
 To compile your library, enter the `out/generators/my-codegen` directory, run `mvn package` and execute the generator:
 
 ```sh
@@ -50,11 +52,59 @@ Note the `my-codegen` is an option for `-g` now, and you can use the usual argum
 
 ```sh
 java -cp out/codegens/customCodegen/target/my-codegen-openapi-generator-1.0.0.jar:modules/openapi-generator-cli/target/openapi-generator-cli.jar \
-  io.openapitools.codegen.OpenAPIGenerator generate -g my-codegen \
+  org.openapitools.codegen.OpenAPIGenerator generate -g my-codegen \
   -i https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/2_0/petstore.yaml \
   -o ./out/myClient
 ```
 
+For Windows users:
+```
+java -cp out/codegens/customCodegen/target/my-codegen-openapi-generator-1.0.0.jar;modules/openapi-generator-cli/target/openapi-generator-cli.jar \
+  org.openapitools.codegen.OpenAPIGenerator generate -g my-codegen \
+  -i https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/2_0/petstore.yaml \
+  -o ./out/myClient
+```
+
+#### Use your new generator with the maven plugin
+
+Install your library to your local maven repository by running:
+
+```
+mvn clean install -f out/generators/my-codegen
+```
+
+This will install `org.openapitools:my-codegen-openapi-generator:1.0.0` to your local maven repository.
+
+You can use this as additional dependency of the `openapi-generator-maven-plugin` plugin and use `my-codegen` as `generatorName` value:
+
+```xml
+<plugin>
+  <groupId>org.openapitools</groupId>
+  <artifactId>openapi-generator-maven-plugin</artifactId>
+  <version>${openapi-generator-version}</version>
+  <executions>
+    <execution>
+      <id>generate-client-code</id>
+      <goals>
+        <goal>generate</goal>
+      </goals>
+      <configuration>
+        <generatorName>my-codegen</generatorName>
+        <!-- other configuration ... -->
+      </configuration>
+    </execution>
+  </executions>
+  <dependencies>
+    <dependency>
+      <groupId>org.openapitools</groupId>
+      <artifactId>my-codegen-openapi-generator</artifactId>
+      <version>1.0.0</version>
+    </dependency>
+  </dependencies>
+</plugin>
+```
+
+If you publish your artifact to a distant maven repository, do not forget to add this repository as `pluginRepository` for your project.
 
 ### Selective generation
 You may not want to generate *all* models in your project.  Likewise you may want just one or two apis to be written.  If that's the case, you can use system properties to control the output:
@@ -106,6 +156,14 @@ java -Dapis -DmodelTests=false {opts}
 
 When using selective generation, _only_ the templates needed for the specific generation will be used.
 
+To skip models defined as the form parameters in "requestBody", please use `skipFormModel` (default to false) (this option is introduced at v3.2.2)
+
+```sh
+java -DskipFormModel=true
+```
+
+This option will be helpful to skip model generation due to the form parameter, which is defined differently in OAS3 as there's no form parameter in OAS3
+
 ### Ignore file format
 
 OpenAPI Generator supports a `.openapi-generator-ignore` file, similar to `.gitignore` or `.dockerignore` you're probably already familiar with.

modules/openapi-generator-cli/src/main/java/org/openapitools/codegen/OpenAPIGenerator.java

@@ -24,6 +24,8 @@ import io.airlift.airline.ParseOptionMissingException;
 import io.airlift.airline.ParseOptionMissingValueException;
 import org.openapitools.codegen.cmd.*;
 
+import java.util.Locale;
+
 /**
  * User: lanwen Date: 24.03.15 Time: 17:56
  * <p>
@@ -40,6 +42,7 @@ public class OpenAPIGenerator {
                 Cli.<Runnable>builder("openapi-generator-cli")
                         .withDescription(
                                 String.format(
+                                        Locale.ROOT,
                                         "OpenAPI generator CLI (version %s).",
                                         version))
                         .withDefaultCommand(ListGenerators.class)
@@ -69,10 +72,10 @@ public class OpenAPIGenerator {
                 System.exit(1);
             }
         } catch (ParseArgumentsUnexpectedException e) {
-            System.err.printf("[error] %s%n%nSee 'openapi-generator-cli help' for usage.%n", e.getMessage());
+            System.err.printf(Locale.ROOT,"[error] %s%n%nSee 'openapi-generator-cli help' for usage.%n", e.getMessage());
             System.exit(1);
         } catch (ParseOptionMissingException | ParseOptionMissingValueException e) {
-            System.err.printf("[error] %s%n", e.getMessage());
+            System.err.printf(Locale.ROOT,"[error] %s%n", e.getMessage());
             System.exit(1);
         }
     }

modules/openapi-generator-cli/src/main/java/org/openapitools/codegen/cmd/Generate.java

@@ -17,6 +17,8 @@
 
 package org.openapitools.codegen.cmd;
 
+import ch.qos.logback.classic.LoggerContext;
+import ch.qos.logback.core.spi.FilterAttachable;
 import io.airlift.airline.Command;
 import io.airlift.airline.Option;
 import org.openapitools.codegen.ClientOptInput;
@@ -32,6 +34,7 @@ import static org.apache.commons.lang3.StringUtils.isNotEmpty;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.Stream;
 
 /**
  * User: lanwen Date: 24.03.15 Time: 20:22
@@ -199,8 +202,23 @@ public class Generate implements Runnable {
             description = "Skips the default behavior of validating an input specification.")
     private Boolean skipValidateSpec;
 
+    @Option(name = {"--log-to-stderr"},
+            title = "Log to STDERR",
+            description = "write all log messages (not just errors) to STDOUT."
+                    + " Useful for piping the JSON output of debug options (e.g. `-DdebugOperations`) to an external parser directly while testing a generator.")
+    private Boolean logToStderr;
+
     @Override
     public void run() {
+        if (logToStderr != null) {
+            LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
+            Stream.of(Logger.ROOT_LOGGER_NAME, "io.swagger", "org.openapitools")
+                    .map(lc::getLogger)
+                    .peek(logger -> logger.detachAppender("STDOUT"))
+                    .reduce((logger, next) -> logger.getName().equals(Logger.ROOT_LOGGER_NAME) ? logger : next)
+                    .map(root -> root.getAppender("STDERR"))
+                    .ifPresent(FilterAttachable::clearAllFilters);
+        }
 
         // attempt to read from config file
         CodegenConfigurator configurator = CodegenConfigurator.fromFile(configFile);

modules/openapi-generator-cli/src/main/java/org/openapitools/codegen/cmd/Langs.java

@@ -21,6 +21,8 @@ import ch.lambdaj.collection.LambdaIterable;
 import io.airlift.airline.Command;
 import org.openapitools.codegen.CodegenConfig;
 
+import java.util.Locale;
+
 import static ch.lambdaj.Lambda.on;
 import static ch.lambdaj.collection.LambdaCollections.with;
 import static java.util.ServiceLoader.load;
@@ -34,6 +36,6 @@ public class Langs implements Runnable {
     public void run() {
         LambdaIterable<String> langs =
                 with(load(CodegenConfig.class)).extract(on(CodegenConfig.class).getName());
-        System.out.printf("Available languages (generators): %s%n", langs);
+        System.out.printf(Locale.ROOT, "Available languages (generators): %s%n", langs);
     }
 }

modules/openapi-generator-cli/src/main/java/org/openapitools/codegen/cmd/ListGenerators.java

@@ -9,6 +9,7 @@ import org.openapitools.codegen.CodegenType;
 import java.util.Arrays;
 import java.util.Comparator;
 import java.util.List;
+import java.util.Locale;
 
 // NOTE: List can later have subcommands such as list languages, list types, list frameworks, etc.
 @Command(name = "list", description = "Lists the available generators")
@@ -53,6 +54,6 @@ public class ListGenerators implements Runnable {
             }
         }
 
-        System.out.printf("%s%n", sb.toString());
+        System.out.printf(Locale.ROOT,"%s%n", sb.toString());
     }
 }

modules/openapi-generator-gradle-plugin/README.adoc

@@ -2,6 +2,9 @@
 
 This document describes the gradle plugin for OpenAPI Generator.
 
+This gradle plugin offers a declarative DSL via _extensions_ (these are Gradle project extensions).
+These map almost fully 1:1 with the options you'd pass to the CLI or Maven plugin. The plugin maps the extensions to a task of the same name to provide a clean API. If you're interested in the extension/task mapping concept from a high-level, you can https://docs.gradle.org/current/userguide/custom_plugins.html#sec:mapping_extension_properties_to_task_properties[check out Gradle's docs].
+
 == Tasks
 
 Tasks are listed under the "OpenAPI Tools" tasks heading.
@@ -24,6 +27,17 @@ Tasks are listed under the "OpenAPI Tools" tasks heading.
 |Validates an Open API 2.0 or 3.x specification document.
 |===
 
+
+[NOTE]
+====
+The plugin implements the above tasks as project extensions of the same name. If you'd like to declare
+these tasks as dependencies to other tasks (using `dependsOn`), you'll need  a task reference. e.g.:
+
+```
+compileJava.dependsOn tasks.openApiGenerate
+```
+====
+
 == Plugin Setup
 
 [source,groovy]
@@ -34,7 +48,7 @@ buildscript {
     mavenCentral()
   }
   dependencies {
-    classpath "org.openapitools:openapi-generator-gradle-plugin:3.2.1"
+    classpath "org.openapitools:openapi-generator-gradle-plugin:3.2.2"
   }
 }
 
@@ -455,3 +469,65 @@ Run with --stacktrace option to get the stack trace. Run with --info or --debug
 ----
 $ ./gradlew openApiValidate --input=/Users/jim/projects/openapi-generator/modules/openapi-generator/src/test/resources/3_0/petstore.yaml
 ----
+
+=== Generate multiple sources
+
+If you want to perform multiple generation tasks, you'd want to create a task that inherits from the `GenerateTask`.
+Examples can be found in https://github.com/OpenAPITools/openapi-generator/blob/master/modules/openapi-generator-gradle-plugin/samples/local-spec/build.gradle[samples/local-spec/build.gradle].
+
+You can define any number of generator tasks; the generated code does _not_ need to be a JVM language.
+
+```gradle
+task buildGoClient(type: org.openapitools.generator.gradle.plugin.tasks.GenerateTask){
+    generatorName = "go"
+    inputSpec = "$rootDir/petstore-v3.0.yaml".toString()
+    additionalProperties = [
+            packageName: "petstore"
+    ]
+    outputDir = "$buildDir/go".toString()
+    configOptions = [
+            dateLibrary: "threetenp"
+    ]
+}
+task buildKotlinClient(type: org.openapitools.generator.gradle.plugin.tasks.GenerateTask){
+    generatorName = "kotlin"
+    inputSpec = "$rootDir/petstore-v3.0.yaml".toString()
+    outputDir = "$buildDir/kotlin".toString()
+    apiPackage = "org.openapitools.example.api"
+    invokerPackage = "org.openapitools.example.invoker"
+    modelPackage = "org.openapitools.example.model"
+    configOptions = [
+            dateLibrary: "java8"
+    ]
+    systemProperties = [
+            modelDocs: "false"
+    ]
+}
+```
+
+To execute your specs, you'd then do:
+
+```
+./gradlew buildGoClient buildKotlinClient
+```
+
+If you want to simplify the execution, you could create a new task with `dependsOn`.
+
+```gradle
+task codegen(dependsOn: ['buildGoClient', 'buildKotlinClient'])
+```
+
+Or, if you're generating the code on compile, you can add these as a dependency to `compileJava` or any other existing task.
+You can also mix the default task `openApiGenerate` with custom tasks:
+
+```gradle
+compileJava.dependsOn buildKotlinClient, tasks.openApiGenerate
+```
+
+[NOTE]
+====
+`openApiGenerate` is a project extension _and_ a task. If you want to use this in `dependsOn`,
+you need a task reference or instance. One way to do this is to access it as `tasks.openApiGenerate`.
+
+You can run `gradle tasks --debug` to see this registration.
+====

modules/openapi-generator-gradle-plugin/samples/local-spec/README.md

@@ -17,5 +17,5 @@ gradle generateGoWithInvalidSpec
 The samples can be tested against other versions of the plugin using the `openApiGeneratorVersion` property. For example:
 
 ```bash
-gradle -PopenApiGeneratorVersion=3.2.1 openApiValidate
+gradle -PopenApiGeneratorVersion=3.2.2 openApiValidate
 ```

modules/openapi-generator-gradle-plugin/samples/local-spec/gradle.properties

@@ -1 +1 @@
-openApiGeneratorVersion=3.2.1
+openApiGeneratorVersion=3.2.2

modules/openapi-generator-maven-plugin/README.md

@@ -11,7 +11,7 @@ Add to your `build->plugins` section (default phase is `generate-sources` phase)
 <plugin>
     <groupId>org.openapitools</groupId>
     <artifactId>openapi-generator-maven-plugin</artifactId>
-    <version>3.2.1</version>
+    <version>3.2.2</version>
     <executions>
         <execution>
             <goals>

modules/openapi-generator-maven-plugin/examples/java-client.xml

@@ -12,7 +12,7 @@
             <plugin>
                 <groupId>org.openapitools</groupId>
                 <artifactId>openapi-generator-maven-plugin</artifactId>
-                <version>3.2.1</version>
+                <version>3.2.2</version>
                 <executions>
                     <execution>
                         <goals>

modules/openapi-generator-maven-plugin/examples/non-java-invalid-spec.xml

@@ -12,7 +12,7 @@
             <plugin>
                 <groupId>org.openapitools</groupId>
                 <artifactId>openapi-generator-maven-plugin</artifactId>
-                <version>3.2.1</version>
+                <version>3.2.2</version>
                 <executions>
                     <execution>
                         <goals>

modules/openapi-generator-maven-plugin/examples/non-java.xml

@@ -12,7 +12,7 @@
             <plugin>
                 <groupId>org.openapitools</groupId>
                 <artifactId>openapi-generator-maven-plugin</artifactId>
-                <version>3.2.1</version>
+                <version>3.2.2</version>
                 <executions>
                     <execution>
                         <goals>

modules/openapi-generator-online/src/main/java/org/openapitools/codegen/online/service/Generator.java

@@ -19,11 +19,16 @@ package org.openapitools.codegen.online.service;
 
 import com.fasterxml.jackson.databind.JsonNode;
 import io.swagger.parser.OpenAPIParser;
-import io.swagger.v3.oas.models.OpenAPI;
-import io.swagger.v3.parser.core.models.ParseOptions;
-import org.openapitools.codegen.*;
-import io.swagger.v3.parser.core.models.AuthorizationValue;
 import io.swagger.v3.core.util.Json;
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.parser.core.models.AuthorizationValue;
+import io.swagger.v3.parser.core.models.ParseOptions;
+import org.openapitools.codegen.CliOption;
+import org.openapitools.codegen.ClientOptInput;
+import org.openapitools.codegen.ClientOpts;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenConfigLoader;
+import org.openapitools.codegen.DefaultGenerator;
 import org.openapitools.codegen.online.model.GeneratorInput;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -34,6 +39,7 @@ import java.io.File;
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 public class Generator {
@@ -44,7 +50,7 @@ public class Generator {
         try {
             config = CodegenConfigLoader.forName(language);
         } catch (Exception e) {
-            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, String.format("Unsupported target %s supplied. %s",
+            throw new ResponseStatusException(HttpStatus.BAD_REQUEST, String.format(Locale.ROOT,"Unsupported target %s supplied. %s",
                     language, e));
         }
         Map<String, CliOption> map = new LinkedHashMap<>();
@@ -77,7 +83,7 @@ public class Generator {
     }
 
     private static String generate(String language, GeneratorInput opts, Type type) {
-        LOGGER.debug(String.format("generate %s for %s", type.getTypeName(), language));
+        LOGGER.debug(String.format(Locale.ROOT,"generate %s for %s", type.getTypeName(), language));
         if (opts == null) {
             throw new ResponseStatusException(HttpStatus.BAD_REQUEST, "No options were supplied");
         }

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenConfig.java

@@ -23,6 +23,8 @@ import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.media.Schema;
 import io.swagger.v3.oas.models.security.SecurityScheme;
+import io.swagger.v3.oas.models.servers.Server;
+import io.swagger.v3.oas.models.servers.ServerVariable;
 
 import java.util.List;
 import java.util.Map;
@@ -113,6 +115,10 @@ public interface CodegenConfig {
 
     List<CodegenSecurity> fromSecurity(Map<String, SecurityScheme> schemas);
 
+    List<CodegenServer> fromServers(List<Server> servers);
+  
+    List<CodegenServerVariable> fromServerVariables(Map<String, ServerVariable> variables);
+    
     Set<String> defaultIncludes();
 
     Map<String, String> typeMapping();

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenConstants.java

@@ -31,6 +31,7 @@ public class CodegenConstants {
     public static final String API_TESTS = "apiTests";
     public static final String API_DOCS = "apiDocs";
     public static final String WITH_XML = "withXml";
+    public static final String SKIP_FORM_MODEL = "skipFormModel";
     /* /end System Properties */
 
     public static final String API_PACKAGE = "apiPackage";

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenModel.java

@@ -22,6 +22,7 @@ import io.swagger.v3.oas.models.ExternalDocumentation;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
@@ -76,7 +77,7 @@ public class CodegenModel {
 
     @Override
     public String toString() {
-        return String.format("%s(%s)", name, classname);
+        return String.format(Locale.ROOT, "%s(%s)", name, classname);
     }
 
     @Override

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenOperation.java

@@ -25,6 +25,7 @@ import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 
@@ -196,7 +197,7 @@ public class CodegenOperation {
      * @return true if act as Restful update method, false otherwise
      */
     public boolean isRestfulUpdate() {
-        return Arrays.asList("PUT", "PATCH").contains(httpMethod.toUpperCase()) && isMemberPath();
+        return Arrays.asList("PUT", "PATCH").contains(httpMethod.toUpperCase(Locale.ROOT)) && isMemberPath();
     }
 
     /**
@@ -205,7 +206,7 @@ public class CodegenOperation {
      * @return true request method is PUT, PATCH or POST; false otherwise
      */
     public boolean isBodyAllowed() {
-        return Arrays.asList("PUT", "PATCH", "POST").contains(httpMethod.toUpperCase());
+        return Arrays.asList("PUT", "PATCH", "POST").contains(httpMethod.toUpperCase(Locale.ROOT));
     }
 
     /**
@@ -232,7 +233,7 @@ public class CodegenOperation {
      * @return the substring
      */
     private String pathWithoutBaseName() {
-        return baseName != null ? path.replace("/" + baseName.toLowerCase(), "") : path;
+        return baseName != null ? path.replace("/" + baseName.toLowerCase(Locale.ROOT), "") : path;
     }
 
     /**
@@ -248,7 +249,7 @@ public class CodegenOperation {
 
     @Override
     public String toString() {
-        return String.format("%s(%s)", baseName, path);
+        return String.format(Locale.ROOT, "%s(%s)", baseName, path);
     }
 
     @Override

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenProperty.java

@@ -59,7 +59,9 @@ public class CodegenProperty implements Cloneable {
     public boolean isString, isNumeric, isInteger, isLong, isNumber, isFloat, isDouble, isByteArray, isBinary, isFile, isBoolean, isDate, isDateTime, isUuid;
     public boolean isListContainer, isMapContainer;
     public boolean isEnum;
-    public boolean isReadOnly = false;
+    public boolean isReadOnly;
+    public boolean isWriteOnly;
+    public boolean isNullable;
     public List<String> _enum;
     public Map<String, Object> allowableValues;
     public CodegenProperty items;
@@ -437,6 +439,8 @@ public class CodegenProperty implements Cloneable {
         result = prime * result + ((isNotContainer ? 13:31));
         result = prime * result + ((isPrimitiveType  ? 13:31));
         result = prime * result + ((isReadOnly  ? 13:31));
+        result = prime * result + ((isWriteOnly  ? 13:31));
+        result = prime * result + ((isNullable  ? 13:31));
         result = prime * result + ((items == null) ? 0 : items.hashCode());
         result = prime * result + ((mostInnerItems == null) ? 0 : mostInnerItems.hashCode());
         result = prime * result + ((jsonSchema == null) ? 0 : jsonSchema.hashCode());
@@ -587,6 +591,12 @@ public class CodegenProperty implements Cloneable {
         if (this.isReadOnly != other.isReadOnly) {
             return false;
         }
+        if (this.isWriteOnly != other.isWriteOnly) {
+            return false;
+        }
+        if (this.isNullable != other.isNullable) {
+            return false;
+        }
         if (this._enum != other._enum && (this._enum == null || !this._enum.equals(other._enum))) {
             return false;
         }
@@ -769,6 +779,8 @@ public class CodegenProperty implements Cloneable {
                 ", isMapContainer=" + isMapContainer +
                 ", isEnum=" + isEnum +
                 ", isReadOnly=" + isReadOnly +
+                ", isWriteOnly=" + isWriteOnly+
+                ", isNullable=" + isNullable +
                 ", _enum=" + _enum +
                 ", allowableValues=" + allowableValues +
                 ", items=" + items +

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenResponse.java

@@ -20,6 +20,7 @@ package org.openapitools.codegen;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 public class CodegenResponse {
@@ -47,7 +48,7 @@ public class CodegenResponse {
 
     @Override
     public String toString() {
-        return String.format("%s(%s)", code, containerType);
+        return String.format(Locale.ROOT, "%s(%s)", code, containerType);
     }
 
     @Override

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenSecurity.java

@@ -21,6 +21,7 @@ import io.swagger.v3.oas.models.security.Scopes;
 
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 public class CodegenSecurity {
@@ -38,7 +39,7 @@ public class CodegenSecurity {
 
     @Override
     public String toString() {
-        return String.format("%s(%s)", name, type);
+        return String.format(Locale.ROOT, "%s(%s)", name, type);
     }
 
     @Override

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenServer.java

@@ -0,0 +1,9 @@
+package org.openapitools.codegen;
+
+import java.util.List;
+
+public class CodegenServer {
+    public String url;
+    public String description;
+    public List<CodegenServerVariable> variables;
+}

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenServerVariable.java

@@ -0,0 +1,10 @@
+package org.openapitools.codegen;
+
+import java.util.List;
+
+public class CodegenServerVariable {
+    public String name;
+    public String defaultValue;
+    public String description;
+    public List<String> enumValues;
+}

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenType.java

@@ -21,6 +21,7 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
 
 import java.util.HashMap;
+import java.util.Locale;
 import java.util.Map;
 
 public enum CodegenType {
@@ -30,7 +31,7 @@ public enum CodegenType {
 
     @JsonCreator
     public static CodegenType forValue(String value) {
-        return names.get(value.toLowerCase());
+        return names.get(value.toLowerCase(Locale.ROOT));
     }
 
     @JsonValue

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java

@@ -43,6 +43,8 @@ import io.swagger.v3.oas.models.responses.ApiResponses;
 import io.swagger.v3.oas.models.security.OAuthFlow;
 import io.swagger.v3.oas.models.security.OAuthFlows;
 import io.swagger.v3.oas.models.security.SecurityScheme;
+import io.swagger.v3.oas.models.servers.Server;
+import io.swagger.v3.oas.models.servers.ServerVariable;
 import io.swagger.v3.parser.util.SchemaTypeUtil;
 
 import org.apache.commons.lang3.ObjectUtils;
@@ -64,7 +66,9 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
+import java.util.LinkedList;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Set;
@@ -72,7 +76,6 @@ import java.util.TreeSet;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
-import java.util.stream.Stream;
 
 public class DefaultCodegen implements CodegenConfig {
     private static final Logger LOGGER = LoggerFactory.getLogger(DefaultCodegen.class);
@@ -182,7 +185,7 @@ public class DefaultCodegen implements CodegenConfig {
                     .get(CodegenConstants.REMOVE_OPERATION_ID_PREFIX).toString()));
         }
 
-        if (additionalProperties.containsKey(CodegenConstants.DOCEXTENSION)){
+        if (additionalProperties.containsKey(CodegenConstants.DOCEXTENSION)) {
             this.setDocExtension(String.valueOf(additionalProperties
                     .get(CodegenConstants.DOCEXTENSION).toString()));
         }
@@ -355,7 +358,7 @@ public class DefaultCodegen implements CodegenConfig {
             return "EMPTY";
         }
 
-        String var = value.replaceAll("\\W+", "_").toUpperCase();
+        String var = value.replaceAll("\\W+", "_").toUpperCase(Locale.ROOT);
         if (var.matches("\\d.*")) {
             return "_" + var;
         } else {
@@ -768,7 +771,7 @@ public class DefaultCodegen implements CodegenConfig {
     public String toVarName(String name) {
         if (reservedWords.contains(name)) {
             return escapeReservedWord(name);
-        } else if (((CharSequence) name).chars().anyMatch(character -> specialCharReplacements.keySet().contains( "" + ((char) character)))) {
+        } else if (((CharSequence) name).chars().anyMatch(character -> specialCharReplacements.keySet().contains("" + ((char) character)))) {
             return escapeSpecialCharacters(name, null, null);
         } else {
             return name;
@@ -786,7 +789,7 @@ public class DefaultCodegen implements CodegenConfig {
         name = removeNonNameElementToCamelCase(name); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.
         if (reservedWords.contains(name)) {
             return escapeReservedWord(name);
-        } else if (((CharSequence) name).chars().anyMatch(character -> specialCharReplacements.keySet().contains( "" + ((char) character)))) {
+        } else if (((CharSequence) name).chars().anyMatch(character -> specialCharReplacements.keySet().contains("" + ((char) character)))) {
             return escapeSpecialCharacters(name, null, null);
         }
         return name;
@@ -842,11 +845,11 @@ public class DefaultCodegen implements CodegenConfig {
             if (charactersToAllow != null && charactersToAllow.contains(character)) {
                 return character;
             } else if (specialCharReplacements.containsKey(character)) {
-              return specialCharReplacements.get(character) + (appdendixToReplacement != null ? appdendixToReplacement: "");
+                return specialCharReplacements.get(character) + (appdendixToReplacement != null ? appdendixToReplacement : "");
             } else {
                 return character;
             }
-        }).reduce( (c1, c2) -> "" + c1 + c2).orElse(null);
+        }).reduce((c1, c2) -> "" + c1 + c2).orElse(null);
 
         if (result != null) return result;
         throw new RuntimeException("Word '" + name + "' could not be escaped.");
@@ -1091,7 +1094,7 @@ public class DefaultCodegen implements CodegenConfig {
      */
     public String toInstantiationType(Schema schema) {
         if (ModelUtils.isMapSchema(schema)) {
-            Schema additionalProperties = (Schema) schema.getAdditionalProperties();
+            Schema additionalProperties = ModelUtils.getAdditionalProperties(schema);
             String type = additionalProperties.getType();
             if (null == type) {
                 LOGGER.error("No Type defined for Additional Property " + additionalProperties + "\n" //
@@ -1680,13 +1683,13 @@ public class DefaultCodegen implements CodegenConfig {
     }
 
     private CodegenDiscriminator createDiscriminator(String schemaName, Schema schema, Map<String, Schema> allDefinitions) {
-        if(schema.getDiscriminator() == null) {
+        if (schema.getDiscriminator() == null) {
             return null;
         }
         CodegenDiscriminator discriminator = new CodegenDiscriminator();
         discriminator.setPropertyName(schema.getDiscriminator().getPropertyName());
         discriminator.setMapping(schema.getDiscriminator().getMapping());
-        if(schema.getDiscriminator().getMapping() != null && !schema.getDiscriminator().getMapping().isEmpty()) {
+        if (schema.getDiscriminator().getMapping() != null && !schema.getDiscriminator().getMapping().isEmpty()) {
             for (Entry<String, String> e : schema.getDiscriminator().getMapping().entrySet()) {
                 String name = ModelUtils.getSimpleRef(e.getValue());
                 discriminator.getMappedModels().add(new MappedModel(e.getKey(), name));
@@ -1783,6 +1786,13 @@ public class DefaultCodegen implements CodegenConfig {
         if (p.getReadOnly() != null) {
             property.isReadOnly = p.getReadOnly();
         }
+        if (p.getWriteOnly() != null) {
+            property.isWriteOnly = p.getWriteOnly();
+        }
+        if (p.getNullable() != null) {
+            property.isNullable = p.getNullable();
+        }
+
         if (p.getXml() != null) {
             if (p.getXml().getAttribute() != null) {
                 property.isXmlAttribute = p.getXml().getAttribute();
@@ -1995,7 +2005,7 @@ public class DefaultCodegen implements CodegenConfig {
             property.maxItems = p.getMaxProperties();
 
             // handle inner property
-            CodegenProperty cp = fromProperty("inner", (Schema) p.getAdditionalProperties());
+            CodegenProperty cp = fromProperty("inner", ModelUtils.getAdditionalProperties(p));
             updatePropertyForMap(property, cp);
         } else { // model
             // TODO revise the logic below
@@ -2257,7 +2267,7 @@ public class DefaultCodegen implements CodegenConfig {
             for (String key : operation.getResponses().keySet()) {
                 ApiResponse response = operation.getResponses().get(key);
                 addProducesInfo(openAPI, response, op);
-                CodegenResponse r = fromResponse(key, response);
+                CodegenResponse r = fromResponse(openAPI, key, response);
                 r.hasMore = true;
                 if (r.baseType != null &&
                         !defaultIncludes.contains(r.baseType) &&
@@ -2285,7 +2295,7 @@ public class DefaultCodegen implements CodegenConfig {
                         CodegenProperty innerProperty = fromProperty("response", as.getItems());
                         op.returnBaseType = innerProperty.baseType;
                     } else if (ModelUtils.isMapSchema(responseSchema)) {
-                        CodegenProperty innerProperty = fromProperty("response", (Schema) responseSchema.getAdditionalProperties());
+                        CodegenProperty innerProperty = fromProperty("response", ModelUtils.getAdditionalProperties(responseSchema));
                         op.returnBaseType = innerProperty.baseType;
                     } else {
                         if (cm.complexType != null) {
@@ -2326,7 +2336,7 @@ public class DefaultCodegen implements CodegenConfig {
                         op.returnTypeIsPrimitive = true;
                     }
                 }
-                addHeaders(methodResponse, op.responseHeaders);
+                addHeaders(openAPI, methodResponse, op.responseHeaders);
             }
         }
 
@@ -2366,7 +2376,7 @@ public class DefaultCodegen implements CodegenConfig {
                     bodyParameterName = (String) op.vendorExtensions.get("x-codegen-request-body-name");
                 }
                 bodyParam = fromRequestBody(requestBody, schemas, imports, bodyParameterName);
-                bodyParam.description = requestBody.getDescription();
+                bodyParam.description = escapeText(requestBody.getDescription());
                 postProcessParameter(bodyParam);
 
                 bodyParams.add(bodyParam);
@@ -2443,7 +2453,7 @@ public class DefaultCodegen implements CodegenConfig {
         }
 
         op.bodyParam = bodyParam;
-        op.httpMethod = httpMethod.toUpperCase();
+        op.httpMethod = httpMethod.toUpperCase(Locale.ROOT);
 
         // move "required" parameters in front of "optional" parameters
         if (sortParamsByRequiredFlag) {
@@ -2503,11 +2513,12 @@ public class DefaultCodegen implements CodegenConfig {
     /**
      * Convert OAS Response object to Codegen Response object
      *
+     * @param openAPI      a OAS object representing the spec
      * @param responseCode HTTP response code
      * @param response     OAS Response object
      * @return Codegen Response object
      */
-    public CodegenResponse fromResponse(String responseCode, ApiResponse response) {
+    public CodegenResponse fromResponse(OpenAPI openAPI, String responseCode, ApiResponse response) {
         CodegenResponse r = CodegenModelFactory.newInstance(CodegenModelType.RESPONSE);
         if ("default".equals(responseCode)) {
             r.code = "0";
@@ -2524,7 +2535,7 @@ public class DefaultCodegen implements CodegenConfig {
         if (response.getExtensions() != null && !response.getExtensions().isEmpty()) {
             r.vendorExtensions.putAll(response.getExtensions());
         }
-        addHeaders(response, r.headers);
+        addHeaders(openAPI, response, r.headers);
         r.hasHeaders = !r.headers.isEmpty();
 
         if (r.schema != null) {
@@ -2671,7 +2682,7 @@ public class DefaultCodegen implements CodegenConfig {
                 }
 
             } else if (ModelUtils.isMapSchema(parameterSchema)) { // for map parameter
-                CodegenProperty codegenProperty = fromProperty("inner", (Schema) parameterSchema.getAdditionalProperties());
+                CodegenProperty codegenProperty = fromProperty("inner", ModelUtils.getAdditionalProperties(parameterSchema));
                 codegenParameter.items = codegenProperty;
                 codegenParameter.mostInnerItems = codegenProperty.mostInnerItems;
                 codegenParameter.baseType = codegenProperty.dataType;
@@ -2896,7 +2907,7 @@ public class DefaultCodegen implements CodegenConfig {
     // TODO revise below as it should be replaced by ModelUtils.isByteArraySchema(parameterSchema)
     public boolean isDataTypeBinary(String dataType) {
         if (dataType != null) {
-            return dataType.toLowerCase().startsWith("byte");
+            return dataType.toLowerCase(Locale.ROOT).startsWith("byte");
         } else {
             return false;
         }
@@ -2905,7 +2916,7 @@ public class DefaultCodegen implements CodegenConfig {
     // TODO revise below as it should be replaced by ModelUtils.isFileSchema(parameterSchema)
     public boolean isDataTypeFile(String dataType) {
         if (dataType != null) {
-            return dataType.toLowerCase().equals("file");
+            return dataType.toLowerCase(Locale.ROOT).equals("file");
         } else {
             return false;
         }
@@ -2993,12 +3004,12 @@ public class DefaultCodegen implements CodegenConfig {
     protected void setReservedWordsLowerCase(List<String> words) {
         reservedWords = new HashSet<String>();
         for (String word : words) {
-            reservedWords.add(word.toLowerCase());
+            reservedWords.add(word.toLowerCase(Locale.ROOT));
         }
     }
 
     protected boolean isReservedWord(String word) {
-        return word != null && reservedWords.contains(word.toLowerCase());
+        return word != null && reservedWords.contains(word.toLowerCase(Locale.ROOT));
     }
 
     /**
@@ -3070,12 +3081,15 @@ public class DefaultCodegen implements CodegenConfig {
      * @param response   API response
      * @param properties list of codegen property
      */
-    private void addHeaders(ApiResponse response, List<CodegenProperty> properties) {
+    private void addHeaders(OpenAPI openAPI, ApiResponse response, List<CodegenProperty> properties) {
         if (response.getHeaders() != null) {
             for (Map.Entry<String, Header> headers : response.getHeaders().entrySet()) {
-                CodegenProperty cp = fromProperty(headers.getKey(), headers.getValue().getSchema());
+                String description = headers.getValue().getDescription();
-                cp.setDescription(escapeText(headers.getValue().getDescription()));
+                // follow the $ref
-                cp.setUnescapedDescription(headers.getValue().getDescription());
+                Header header = ModelUtils.getReferencedHeader(openAPI, headers.getValue());
+                CodegenProperty cp = fromProperty(headers.getKey(), header.getSchema());
+                cp.setDescription(escapeText(description));
+                cp.setUnescapedDescription(description);
                 properties.add(cp);
             }
         }
@@ -3124,7 +3138,7 @@ public class DefaultCodegen implements CodegenConfig {
             LOGGER.warn("generated unique operationId `" + uniqueName + "`");
         }
         co.operationId = uniqueName;
-        co.operationIdLowerCase = uniqueName.toLowerCase();
+        co.operationIdLowerCase = uniqueName.toLowerCase(Locale.ROOT);
         co.operationIdCamelCase = DefaultCodegen.camelize(uniqueName);
         co.operationIdSnakeCase = DefaultCodegen.underscore(uniqueName);
         opList.add(co);
@@ -3170,7 +3184,7 @@ public class DefaultCodegen implements CodegenConfig {
         word = word.replace('-', '_');
         // replace space with underscore
         word = word.replace(' ', '_');
-        word = word.toLowerCase();
+        word = word.toLowerCase(Locale.ROOT);
         return word;
     }
 
@@ -3334,7 +3348,7 @@ public class DefaultCodegen implements CodegenConfig {
      * @param schemas The complete set of model definitions (schemas).
      * @return A mapping from model name to type alias
      */
-    private static Map<String, String> getAllAliases(Map<String, Schema> schemas) {
+    static Map<String, String> getAllAliases(Map<String, Schema> schemas) {
         if (schemas == null || schemas.isEmpty()) {
             return new HashMap<>();
         }
@@ -3377,7 +3391,7 @@ public class DefaultCodegen implements CodegenConfig {
                 .map(StringUtils::capitalize)
                 .collect(Collectors.joining(""));
         if (result.length() > 0) {
-            result = result.substring(0, 1).toLowerCase() + result.substring(1);
+            result = result.substring(0, 1).toLowerCase(Locale.ROOT) + result.substring(1);
         }
         return result;
     }
@@ -3406,7 +3420,7 @@ public class DefaultCodegen implements CodegenConfig {
         Pattern p = Pattern.compile("\\/(.?)");
         Matcher m = p.matcher(word);
         while (m.find()) {
-            word = m.replaceFirst("." + m.group(1)/*.toUpperCase()*/); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.
+            word = m.replaceFirst("." + m.group(1)/*.toUpperCase(Locale.ROOT)*/); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.
             m = p.matcher(word);
         }
 
@@ -3422,7 +3436,7 @@ public class DefaultCodegen implements CodegenConfig {
 
         m = p.matcher(word);
         while (m.find()) {
-            word = m.replaceFirst("" + Character.toUpperCase(m.group(1).charAt(0)) + m.group(1).substring(1)/*.toUpperCase()*/);
+            word = m.replaceFirst("" + Character.toUpperCase(m.group(1).charAt(0)) + m.group(1).substring(1)/*.toUpperCase(Locale.ROOT)*/);
             m = p.matcher(word);
         }
 
@@ -3430,7 +3444,7 @@ public class DefaultCodegen implements CodegenConfig {
         p = Pattern.compile("(\\.?)(\\w)([^\\.]*)$");
         m = p.matcher(word);
         if (m.find()) {
-            String rep = m.group(1) + m.group(2).toUpperCase() + m.group(3);
+            String rep = m.group(1) + m.group(2).toUpperCase(Locale.ROOT) + m.group(3);
             rep = rep.replaceAll("\\$", "\\\\\\$");
             word = m.replaceAll(rep);
         }
@@ -3440,7 +3454,7 @@ public class DefaultCodegen implements CodegenConfig {
         m = p.matcher(word);
         while (m.find()) {
             String original = m.group(2);
-            String upperCase = original.toUpperCase();
+            String upperCase = original.toUpperCase(Locale.ROOT);
             if (original.equals(upperCase)) {
                 word = word.replaceFirst("_", "");
             } else {
@@ -3453,7 +3467,7 @@ public class DefaultCodegen implements CodegenConfig {
         p = Pattern.compile("(-)(.)");
         m = p.matcher(word);
         while (m.find()) {
-            word = m.replaceFirst(m.group(2).toUpperCase());
+            word = m.replaceFirst(m.group(2).toUpperCase(Locale.ROOT));
             m = p.matcher(word);
         }
 
@@ -3465,7 +3479,7 @@ public class DefaultCodegen implements CodegenConfig {
                 charAt = word.charAt(i);
             }
             i = i + 1;
-            word = word.substring(0, i).toLowerCase() + word.substring(i);
+            word = word.substring(0, i).toLowerCase(Locale.ROOT) + word.substring(i);
         }
 
         // remove all underscore
@@ -3488,7 +3502,7 @@ public class DefaultCodegen implements CodegenConfig {
      */
     public String apiDocFilename(String templateName, String tag) {
         String docExtension = getDocExtension();
-        String suffix = docExtension != null ? docExtension: apiDocTemplateFiles().get(templateName);
+        String suffix = docExtension != null ? docExtension : apiDocTemplateFiles().get(templateName);
         return apiDocFileFolder() + File.separator + toApiDocFilename(tag) + suffix;
     }
 
@@ -4239,7 +4253,7 @@ public class DefaultCodegen implements CodegenConfig {
                     codegenParameter.isPrimitiveType = false;
                     codegenParameter.isContainer = true;
                     codegenParameter.isListContainer = true;
-                    codegenParameter.description = s.getDescription();
+                    codegenParameter.description = escapeText(s.getDescription());
                     codegenParameter.dataType = getTypeDeclaration(s);
                     if (codegenParameter.baseType != null && codegenParameter.enumName != null) {
                         codegenParameter.datatypeWithEnum = codegenParameter.dataType.replace(codegenParameter.baseType, codegenParameter.enumName);
@@ -4365,7 +4379,7 @@ public class DefaultCodegen implements CodegenConfig {
         CodegenParameter codegenParameter = CodegenModelFactory.newInstance(CodegenModelType.PARAMETER);
         codegenParameter.baseName = "UNKNOWN_BASE_NAME";
         codegenParameter.paramName = "UNKNOWN_PARAM_NAME";
-        codegenParameter.description = body.getDescription();
+        codegenParameter.description = escapeText(body.getDescription());
         codegenParameter.required = body.getRequired() != null ? body.getRequired() : Boolean.FALSE;
         codegenParameter.isBodyParam = Boolean.TRUE;
 
@@ -4378,7 +4392,7 @@ public class DefaultCodegen implements CodegenConfig {
         }
 
         if (ModelUtils.isMapSchema(schema)) {
-            Schema inner = (Schema) schema.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(schema);
             if (inner == null) {
                 inner = new StringSchema().description("//TODO automatically added by openapi-generator");
                 schema.setAdditionalProperties(inner);
@@ -4423,7 +4437,7 @@ public class DefaultCodegen implements CodegenConfig {
             }
 
             if (StringUtils.isEmpty(bodyParameterName)) {
-                if(StringUtils.isEmpty(mostInnerItem.complexType)) {
+                if (StringUtils.isEmpty(mostInnerItem.complexType)) {
                     codegenParameter.baseName = "request_body";
                 } else {
                     codegenParameter.baseName = mostInnerItem.complexType;
@@ -4466,7 +4480,7 @@ public class DefaultCodegen implements CodegenConfig {
                 imports.add(codegenParameter.baseType);
             } else {
                 CodegenProperty codegenProperty = fromProperty("property", schema);
-                if (schema.getAdditionalProperties() != null) {// http body is map
+                if (ModelUtils.getAdditionalProperties(schema) != null) {// http body is map
                     LOGGER.error("Map should be supported. Please report to openapi-generator github repo about the issue.");
                 } else if (codegenProperty != null) {
                     String codegenModelName, codegenModelDescription;
@@ -4588,4 +4602,38 @@ public class DefaultCodegen implements CodegenConfig {
     public boolean isDataTypeString(String dataType) {
         return "String".equals(dataType);
     }
+
+    @Override
+    public List<CodegenServer> fromServers(List<Server> servers) {
+        if (servers == null) {
+            return Collections.emptyList();
+        }
+        List<CodegenServer> codegenServers = new LinkedList<>();
+        for (Server server : servers) {
+            CodegenServer cs = new CodegenServer();
+            cs.description = escapeText(server.getDescription());
+            cs.url = server.getUrl();
+            cs.variables = this.fromServerVariables(server.getVariables());
+            codegenServers.add(cs);
+        }
+        return codegenServers;
+    }
+
+    @Override
+    public List<CodegenServerVariable> fromServerVariables(Map<String, ServerVariable> variables) {
+        if (variables == null) {
+            return Collections.emptyList();
+        }
+        List<CodegenServerVariable> codegenServerVariables = new LinkedList<>();
+        for (Entry<String, ServerVariable> variableEntry : variables.entrySet()) {
+            CodegenServerVariable codegenServerVariable = new CodegenServerVariable();
+            ServerVariable variable = variableEntry.getValue();
+            codegenServerVariable.defaultValue = variable.getDefault();
+            codegenServerVariable.description = escapeText(variable.getDescription());
+            codegenServerVariable.enumValues = variable.getEnum();
+            codegenServerVariable.name = variableEntry.getKey();
+            codegenServerVariables.add(codegenServerVariable);
+        }
+        return codegenServerVariables;
+    }
 }

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultGenerator.java

@@ -286,7 +286,7 @@ public class DefaultGenerator extends AbstractGenerator implements Generator {
     private void generateModelDocumentation(List<File> files, Map<String, Object> models, String modelName) throws IOException {
         for (String templateName : config.modelDocTemplateFiles().keySet()) {
             String docExtension = config.getDocExtension();
-            String suffix = docExtension!=null ? docExtension : config.modelDocTemplateFiles().get(templateName);
+            String suffix = docExtension != null ? docExtension : config.modelDocTemplateFiles().get(templateName);
             String filename = config.modelDocFileFolder() + File.separator + config.toModelDocFilename(modelName) + suffix;
             if (!config.shouldOverwrite(filename)) {
                 LOGGER.info("Skipped overwriting " + filename);
@@ -382,6 +382,10 @@ public class DefaultGenerator extends AbstractGenerator implements Generator {
             } */
         });
 
+        Boolean skipFormModel = System.getProperty(CodegenConstants.SKIP_FORM_MODEL) != null ?
+                Boolean.valueOf(System.getProperty(CodegenConstants.SKIP_FORM_MODEL)) :
+                getGeneratorPropertyDefaultSwitch(CodegenConstants.SKIP_FORM_MODEL, false);
+
         // process models only
         for (String name : modelKeys) {
             try {
@@ -393,9 +397,14 @@ public class DefaultGenerator extends AbstractGenerator implements Generator {
 
                 // don't generate models that are not used as object (e.g. form parameters)
                 if (unusedModels.contains(name)) {
-                    LOGGER.debug("Model " + name + " not generated since it's marked as unused (due to form parameters)");
+                    if (Boolean.FALSE.equals(skipFormModel)) {
+                        // if skipFormModel sets to true, still generate the model and log the result
+                        LOGGER.info("Model " + name + " (marked as unused due to form parameters) is generated due to skipFormModel=false (default)");
+                    } else {
+                        LOGGER.info("Model " + name + " not generated since it's marked as unused (due to form parameters) and skipFormModel set to true");
                         continue;
                     }
+                }
 
                 Schema schema = schemas.get(name);
                 Map<String, Schema> schemaMap = new HashMap<>();
@@ -754,6 +763,12 @@ public class DefaultGenerator extends AbstractGenerator implements Generator {
             bundle.put("hasAuthMethods", true);
         }
         
+        List<CodegenServer> servers = config.fromServers(openAPI.getServers());
+        if (servers != null && !servers.isEmpty()) {
+            bundle.put("servers", servers);
+            bundle.put("hasServers", true);
+        }
+
         if (openAPI.getExternalDocs() != null) {
             bundle.put("externalDocs", openAPI.getExternalDocs());
         }

modules/openapi-generator/src/main/java/org/openapitools/codegen/InlineModelResolver.java

@@ -238,7 +238,7 @@ public class InlineModelResolver {
                                     }
                                 } else if (property instanceof MapSchema) {
                                     MapSchema mp = (MapSchema) property;
-                                    Schema innerProperty = (Schema) mp.getAdditionalProperties();
+                                    Schema innerProperty = ModelUtils.getAdditionalProperties(mp);
                                     if (innerProperty instanceof ObjectSchema) {
                                         ObjectSchema op = (ObjectSchema) innerProperty;
                                         if (op.getProperties() != null && op.getProperties().size() > 0) {
@@ -431,7 +431,7 @@ public class InlineModelResolver {
                 }
             }
             if (ModelUtils.isMapSchema(property)) {
-                Schema inner = (Schema) property.getAdditionalProperties();
+                Schema inner = ModelUtils.getAdditionalProperties(property);
                 if (inner instanceof ObjectSchema) {
                     ObjectSchema op = (ObjectSchema) inner;
                     if (op.getProperties() != null && op.getProperties().size() > 0) {
@@ -519,7 +519,7 @@ public class InlineModelResolver {
         model.setDescription(description);
         model.setName(object.getName());
         model.setExample(example);
-        model.setItems((Schema) object.getAdditionalProperties());
+        model.setItems(ModelUtils.getAdditionalProperties(object));
         return model;
     }
 

modules/openapi-generator/src/main/java/org/openapitools/codegen/auth/AuthParser.java

@@ -21,6 +21,7 @@ import io.swagger.v3.parser.core.models.AuthorizationValue;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
 import java.net.URLEncoder;
 import java.util.ArrayList;
@@ -39,8 +40,11 @@ public class AuthParser {
             for (String part : parts) {
                 String[] kvPair = part.split(":");
                 if (kvPair.length == 2) {
-                    // FIXME replace the deprecated method by decode(string, encoding). Which encoding is used ? Default UTF-8 ?
+                    try {
-                    auths.add(new AuthorizationValue(URLDecoder.decode(kvPair[0]), URLDecoder.decode(kvPair[1]), "header"));
+                        auths.add(new AuthorizationValue(URLDecoder.decode(kvPair[0], "UTF-8"), URLDecoder.decode(kvPair[1], "UTF-8"), "header"));
+                    } catch (UnsupportedEncodingException e) {
+                        LOGGER.warn(e.getMessage());
+                    }
                 }
             }
         }

modules/openapi-generator/src/main/java/org/openapitools/codegen/config/CodegenConfigurator.java

@@ -19,16 +19,33 @@ package org.openapitools.codegen.config;
 
 import com.fasterxml.jackson.annotation.JsonAnyGetter;
 import com.fasterxml.jackson.annotation.JsonAnySetter;
-import io.swagger.v3.oas.models.OpenAPI;
-import org.openapitools.codegen.*;
-import org.openapitools.codegen.auth.AuthParser;
 import io.swagger.parser.OpenAPIParser;
 import io.swagger.v3.core.util.Json;
+import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.parser.core.models.AuthorizationValue;
 import io.swagger.v3.parser.core.models.ParseOptions;
 import io.swagger.v3.parser.core.models.SwaggerParseResult;
 import org.apache.commons.lang3.Validate;
-import org.openapitools.codegen.languages.*;
+import org.openapitools.codegen.CliOption;
+import org.openapitools.codegen.ClientOptInput;
+import org.openapitools.codegen.ClientOpts;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenConfigLoader;
+import org.openapitools.codegen.CodegenConstants;
+import org.openapitools.codegen.SpecValidationException;
+import org.openapitools.codegen.auth.AuthParser;
+import org.openapitools.codegen.languages.CSharpNancyFXServerCodegen;
+import org.openapitools.codegen.languages.CppQt5ClientCodegen;
+import org.openapitools.codegen.languages.CppRestSdkClientCodegen;
+import org.openapitools.codegen.languages.CppTizenClientCodegen;
+import org.openapitools.codegen.languages.JavaJerseyServerCodegen;
+import org.openapitools.codegen.languages.PhpLumenServerCodegen;
+import org.openapitools.codegen.languages.PhpSlimServerCodegen;
+import org.openapitools.codegen.languages.PhpZendExpressivePathHandlerServerCodegen;
+import org.openapitools.codegen.languages.RubySinatraServerCodegen;
+import org.openapitools.codegen.languages.ScalaAkkaClientCodegen;
+import org.openapitools.codegen.languages.ScalaHttpClientCodegen;
+import org.openapitools.codegen.languages.SwiftClientCodegen;
 import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -40,6 +57,7 @@ import java.nio.file.Paths;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 
@@ -139,7 +157,7 @@ public class CodegenConfigurator implements Serializable {
     public CodegenConfigurator setGeneratorName(final String generatorName) {
         if (nameMigrationMap.containsKey(generatorName)) {
             String newValue = nameMigrationMap.get(generatorName);
-            LOGGER.warn(String.format("The name '%s' is a deprecated. Please update to the new name of '%s'.", generatorName, newValue));
+            LOGGER.warn(String.format(Locale.ROOT, "The name '%s' is a deprecated. Please update to the new name of '%s'.", generatorName, newValue));
             this.generatorName = newValue;
         } else {
             this.generatorName = generatorName;

modules/openapi-generator/src/main/java/org/openapitools/codegen/examples/ExampleGenerator.java

@@ -236,10 +236,10 @@ public class ExampleGenerator {
             Map<String, Object> mp = new HashMap<String, Object>();
             if (property.getName() != null) {
                 mp.put(property.getName(),
-                        resolvePropertyToExample(propertyName, mediaType, (Schema) property.getAdditionalProperties(), processedModels));
+                        resolvePropertyToExample(propertyName, mediaType, ModelUtils.getAdditionalProperties(property), processedModels));
             } else {
                 mp.put("key",
-                        resolvePropertyToExample(propertyName, mediaType, (Schema) property.getAdditionalProperties(), processedModels));
+                        resolvePropertyToExample(propertyName, mediaType, ModelUtils.getAdditionalProperties(property), processedModels));
             }
             return mp;
         } else if (ModelUtils.isUUIDSchema(property)) {

modules/openapi-generator/src/main/java/org/openapitools/codegen/ignore/CodegenIgnoreProcessor.java

@@ -25,9 +25,11 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.*;
+import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
+import java.util.Locale;
 
 /**
  * Presents a processing utility for parsing and evaluating files containing common ignore patterns. (.openapi-generator-ignore)
@@ -82,30 +84,30 @@ public class CodegenIgnoreProcessor {
                 loadCodegenRules(targetIgnoreFile);
                 this.ignoreFile = targetIgnoreFile;
             } catch (IOException e) {
-                LOGGER.error(String.format("Could not process %s.", targetIgnoreFile.getName()), e.getMessage());
+                LOGGER.error(String.format(Locale.ROOT, "Could not process %s.", targetIgnoreFile.getName()), e.getMessage());
             }
         } else if (!".swagger-codegen-ignore".equals(targetIgnoreFile.getName())) {
             final File legacyIgnoreFile = new File(targetIgnoreFile.getParentFile(), ".swagger-codegen-ignore");
             if (legacyIgnoreFile.exists() && legacyIgnoreFile.isFile()) {
-                LOGGER.info(String.format("Legacy support: '%s' file renamed to '%s'.", legacyIgnoreFile.getName(), targetIgnoreFile.getName()));
+                LOGGER.info(String.format(Locale.ROOT, "Legacy support: '%s' file renamed to '%s'.", legacyIgnoreFile.getName(), targetIgnoreFile.getName()));
                 try {
                     Files.move(legacyIgnoreFile, targetIgnoreFile);
                     loadFromFile(targetIgnoreFile);
                 } catch (IOException e) {
-                    LOGGER.error(String.format("Could not rename file: %s", e.getMessage()));
+                    LOGGER.error(String.format(Locale.ROOT, "Could not rename file: %s", e.getMessage()));
                 }
             } else {
                 // log info message
-                LOGGER.info(String.format("No %s file found.", targetIgnoreFile.getName()));
+                LOGGER.info(String.format(Locale.ROOT, "No %s file found.", targetIgnoreFile.getName()));
             }
         } else {
             // log info message
-            LOGGER.info(String.format("No %s file found.", targetIgnoreFile.getName()));
+            LOGGER.info(String.format(Locale.ROOT, "No %s file found.", targetIgnoreFile.getName()));
         }
     }
 
     void loadCodegenRules(final File codegenIgnore) throws IOException {
-        try (BufferedReader reader = new BufferedReader(new FileReader(codegenIgnore))) {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(codegenIgnore), Charset.forName("UTF-8")))) {
             String line;
 
             // NOTE: Comments that start with a : (e.g. //:) are pulled from git documentation for .gitignore

modules/openapi-generator/src/main/java/org/openapitools/codegen/ignore/rules/Rule.java

@@ -183,7 +183,6 @@ public abstract class Rule {
 
             }
         } catch (ParserException e) {
-            e.printStackTrace();
             return new InvalidRule(null, definition, e.getMessage());
         }
 

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractAdaCodegen.java

@@ -19,13 +19,11 @@ package org.openapitools.codegen.languages;
 
 import com.samskivert.mustache.Escapers;
 import com.samskivert.mustache.Mustache;
-
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.media.ArraySchema;
 import io.swagger.v3.oas.models.media.Schema;
 import io.swagger.v3.oas.models.responses.ApiResponse;
-
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenConstants;
 import org.openapitools.codegen.CodegenModel;
@@ -43,6 +41,7 @@ import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 abstract public class AbstractAdaCodegen extends DefaultCodegen implements CodegenConfig {
@@ -180,7 +179,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
     }
 
     public String toFilename(String name) {
-        return name.replace(".", "-").toLowerCase();
+        return name.replace(".", "-").toLowerCase(Locale.ROOT);
     }
 
     /**
@@ -329,7 +328,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
             return getTypeDeclaration(inner) + "_Vectors.Vector";
         }
         if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             String name = getTypeDeclaration(inner) + "_Map";
             if (name.startsWith("Swagger.")) {
                 return name;
@@ -391,7 +390,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
                 String mt = media.get("mediaType");
                 if (mt != null) {
                     mt = mt.replace('/', '_');
-                    media.put("adaMediaType", mt.toUpperCase());
+                    media.put("adaMediaType", mt.toUpperCase(Locale.ROOT));
                     count++;
                 }
             }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractApexCodegen.java

@@ -18,12 +18,12 @@
 package org.openapitools.codegen.languages;
 
 import java.util.*;
-import org.apache.commons.lang3.StringUtils;
 import com.google.common.base.Strings;
+import org.apache.commons.lang3.StringUtils;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenModel;
 import org.openapitools.codegen.CodegenOperation;
 import org.openapitools.codegen.CodegenParameter;
-import org.openapitools.codegen.CodegenModel;
-import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenProperty;
 import org.openapitools.codegen.CodegenType;
 import org.openapitools.codegen.DefaultCodegen;
@@ -90,7 +90,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
         // sanitize name
         name = sanitizeName(name); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.
 
-        if (name.toLowerCase().matches("^_*class$")) {
+        if (name.toLowerCase(Locale.ROOT).matches("^_*class$")) {
             return "propertyClass";
         }
 
@@ -107,7 +107,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
         }
 
         if (startsWithTwoUppercaseLetters(name)) {
-            name = name.substring(0, 2).toLowerCase() + name.substring(2);
+            name = name.substring(0, 2).toLowerCase(Locale.ROOT) + name.substring(2);
         }
 
         // camelize (lower first character) the variable name
@@ -125,7 +125,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
     private boolean startsWithTwoUppercaseLetters(String name) {
         boolean startsWithTwoUppercaseLetters = false;
         if (name.length() > 1) {
-            startsWithTwoUppercaseLetters = name.substring(0, 2).equals(name.substring(0, 2).toUpperCase());
+            startsWithTwoUppercaseLetters = name.substring(0, 2).equals(name.substring(0, 2).toUpperCase(Locale.ROOT));
         }
         return startsWithTwoUppercaseLetters;
     }
@@ -196,7 +196,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
             }
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
 
             if (inner == null) {
                 LOGGER.warn(p.getName() + "(map property) does not have a proper inner type defined");
@@ -225,15 +225,15 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
                 return null;
             }
 
-            return String.format(pattern, getTypeDeclaration(ap.getItems()));
+            return String.format(Locale.ROOT, pattern, getTypeDeclaration(ap.getItems()));
         } else if (ModelUtils.isMapSchema(p)) {
             final MapSchema ap = (MapSchema) p;
             final String pattern = "new HashMap<%s>()";
-            if (ap.getAdditionalProperties() == null) {
+            if (ModelUtils.getAdditionalProperties(ap) == null) {
                 return null;
             }
 
-            return String.format(pattern, String.format("String, %s", getTypeDeclaration((Schema) ap.getAdditionalProperties())));
+            return String.format(Locale.ROOT, pattern, String.format(Locale.ROOT, "String, %s", getTypeDeclaration(ModelUtils.getAdditionalProperties(ap))));
         } else if (ModelUtils.isLongSchema(p)) {
             if (p.getDefault() != null) {
                 return p.getDefault().toString() + "l";
@@ -297,7 +297,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
             p.example = "'" + p.example + "'";
         } else if ("".equals(p.example) || p.example == null && p.dataType != "Object") {
             // Get an example object from the generated model
-            if (!isReservedWord(p.dataType.toLowerCase())) {
+            if (!isReservedWord(p.dataType.toLowerCase(Locale.ROOT))) {
                 p.example = p.dataType + ".getExample()";
             }
         } else {
@@ -332,7 +332,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
             } else if (example.isEmpty()) {
                 example = "2000, 1, 23";
             } else {
-                LOGGER.warn(String.format("The example provided for property '%s' is not a valid RFC3339 date. Defaulting to '2000-01-23'. [%s]", p
+                LOGGER.warn(String.format(Locale.ROOT, "The example provided for property '%s' is not a valid RFC3339 date. Defaulting to '2000-01-23'. [%s]", p
                         .getName(), example));
                 example = "2000, 1, 23";
             }
@@ -343,7 +343,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
             } else if (example.isEmpty()) {
                 example = "2000, 1, 23, 4, 56, 7";
             } else {
-                LOGGER.warn(String.format("The example provided for property '%s' is not a valid RFC3339 datetime. Defaulting to '2000-01-23T04-56-07Z'. [%s]", p
+                LOGGER.warn(String.format(Locale.ROOT, "The example provided for property '%s' is not a valid RFC3339 datetime. Defaulting to '2000-01-23T04-56-07Z'. [%s]", p
                         .getName(), example));
                 example = "2000, 1, 23, 4, 56, 7";
             }
@@ -366,7 +366,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
         } else if (ModelUtils.isLongSchema(p)) {
             example = example.isEmpty() ? "123456789L" : example + "L";
         } else if (ModelUtils.isMapSchema(p)) {
-            example = "new " + getTypeDeclaration(p) + "{'key'=>" + toExampleValue((Schema) p.getAdditionalProperties()) + "}";
+            example = "new " + getTypeDeclaration(p) + "{'key'=>" + toExampleValue(ModelUtils.getAdditionalProperties(p)) + "}";
 
         } else if (ModelUtils.isPasswordSchema(p)) {
             example = example.isEmpty() ? "password123" : escapeText(example);
@@ -526,7 +526,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
 
         // for symbol, e.g. $, #
         if (getSymbolName(value) != null) {
-            return getSymbolName(value).toUpperCase();
+            return getSymbolName(value).toUpperCase(Locale.ROOT);
         }
 
         // number
@@ -540,7 +540,7 @@ public abstract class AbstractApexCodegen extends DefaultCodegen implements Code
         }
 
         // string
-        String var = value.replaceAll("\\W+", "_").toUpperCase();
+        String var = value.replaceAll("\\W+", "_").toUpperCase(Locale.ROOT);
         if (var.matches("\\d.*")) {
             return "_" + var;
         } else {

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractCSharpCodegen.java

@@ -234,7 +234,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
         }
 
         if (additionalProperties.containsKey(CodegenConstants.INVOKER_PACKAGE)) {
-            LOGGER.warn(String.format("%s is not used by C# generators. Please use %s",
+            LOGGER.warn(String.format(Locale.ROOT, "%s is not used by C# generators. Please use %s",
                     CodegenConstants.INVOKER_PACKAGE, CodegenConstants.PACKAGE_NAME));
         }
 
@@ -313,9 +313,9 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
 
         if (additionalProperties.containsKey(CodegenConstants.INTERFACE_PREFIX)) {
             String useInterfacePrefix = additionalProperties.get(CodegenConstants.INTERFACE_PREFIX).toString();
-            if ("false".equals(useInterfacePrefix.toLowerCase())) {
+            if ("false".equals(useInterfacePrefix.toLowerCase(Locale.ROOT))) {
                 setInterfacePrefix("");
-            } else if (!"true".equals(useInterfacePrefix.toLowerCase())) {
+            } else if (!"true".equals(useInterfacePrefix.toLowerCase(Locale.ROOT))) {
                 // NOTE: if user passes "true" explicitly, we use the default I- prefix. The other supported case here is a custom prefix.
                 setInterfacePrefix(sanitizeName(useInterfacePrefix));
             }
@@ -768,8 +768,8 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
         // NOTE: typeMapping here supports things like string/String, long/Long, datetime/DateTime as lowercase keys.
         //       Should we require explicit casing here (values are not insensitive).
         // TODO avoid using toLowerCase as typeMapping should be case-sensitive
-        if (typeMapping.containsKey(openAPIType.toLowerCase())) {
+        if (typeMapping.containsKey(openAPIType.toLowerCase(Locale.ROOT))) {
-            type = typeMapping.get(openAPIType.toLowerCase());
+            type = typeMapping.get(openAPIType.toLowerCase(Locale.ROOT));
             if (languageSpecificPrimitives.contains(type)) {
                 return type;
             }
@@ -811,7 +811,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
             return getArrayTypeDeclaration((ArraySchema) p);
         } else if (ModelUtils.isMapSchema(p)) {
             // Should we also support maps of maps?
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "<string, " + getTypeDeclaration(inner) + ">";
         }
         return super.getTypeDeclaration(p);

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractEiffelCodegen.java

@@ -17,15 +17,11 @@
 
 package org.openapitools.codegen.languages;
 
-import static com.google.common.base.Strings.isNullOrEmpty;
-
 import com.google.common.collect.ArrayListMultimap;
 import com.google.common.collect.Multimap;
-
 import io.swagger.v3.core.util.Json;
 import io.swagger.v3.oas.models.media.ArraySchema;
 import io.swagger.v3.oas.models.media.Schema;
-
 import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConfig;
@@ -46,9 +42,12 @@ import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 
+import static com.google.common.base.Strings.isNullOrEmpty;
+
 public abstract class AbstractEiffelCodegen extends DefaultCodegen implements CodegenConfig {
     private static final Logger LOGGER = LoggerFactory.getLogger(AbstractEiffelCodegen.class);
 
@@ -169,13 +168,13 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
     @Override
     public String toParamName(String name) {
         // params should be lowercase. E.g. "person: PERSON"
-        return toVarName(name).toLowerCase();
+        return toVarName(name).toLowerCase(Locale.ROOT);
     }
 
     @Override
     public String toModelName(String name) {
         // phone_number => PHONE_NUMBER
-        return toModelFilename(name).toUpperCase();
+        return toModelFilename(name).toUpperCase(Locale.ROOT);
     }
 
     @Override
@@ -221,7 +220,7 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
 
     @Override
     public String toApiTestFilename(String name) {
-        return toApiName(name).toLowerCase() + "_test";
+        return toApiName(name).toLowerCase(Locale.ROOT) + "_test";
     }
 
     @Override
@@ -229,7 +228,7 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
         if (name.length() == 0) {
             return "DEFAULT_API";
         }
-        return name.toUpperCase() + "_API";
+        return name.toUpperCase(Locale.ROOT) + "_API";
     }
 
     /**
@@ -269,7 +268,7 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
             }
         }
         if (!isNullOrEmpty(model.parentSchema)) {
-            model.parentSchema = model.parentSchema.toLowerCase();
+            model.parentSchema = model.parentSchema.toLowerCase(Locale.ROOT);
         }
     }
 
@@ -290,7 +289,7 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
             Schema inner = ap.getItems();
             return "LIST [" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
 
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         }
@@ -352,7 +351,7 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
         for (CodegenOperation operation : operations) {
             // http method verb conversion (e.g. PUT => Put)
 
-            operation.httpMethod = camelize(operation.httpMethod.toLowerCase());
+            operation.httpMethod = camelize(operation.httpMethod.toLowerCase(Locale.ROOT));
         }
 
         // remove model imports to avoid error
@@ -557,7 +556,7 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
     @Override
     public String toInstantiationType(Schema p) {
         if (ModelUtils.isMapSchema(p)) {
-            Schema additionalProperties2 = (Schema) p.getAdditionalProperties();
+            Schema additionalProperties2 = ModelUtils.getAdditionalProperties(p);
             String type = additionalProperties2.getType();
             if (null == type) {
                 LOGGER.error("No Type defined for Additional Schema " + additionalProperties2 + "\n" //
@@ -575,7 +574,7 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
     }
 
     public String unCamelize(String name) {
-        return name.replaceAll("(.)(\\p{Upper})", "$1_$2").toLowerCase();
+        return name.replaceAll("(.)(\\p{Upper})", "$1_$2").toLowerCase(Locale.ROOT);
     }
 
     public String toEiffelFeatureStyle(String operationId) {

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractGoCodegen.java

@@ -17,22 +17,16 @@
 
 package org.openapitools.codegen.languages;
 
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.*;
 import org.openapitools.codegen.utils.ModelUtils;
-import io.swagger.v3.oas.models.OpenAPI;
-import io.swagger.v3.oas.models.Operation;
-import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.core.util.Yaml;
-
-import java.util.*;
-
-import org.apache.commons.lang3.StringUtils;
-
-import com.fasterxml.jackson.core.JsonProcessingException;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.util.*;
+
 public abstract class AbstractGoCodegen extends DefaultCodegen implements CodegenConfig {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(AbstractGoCodegen.class);
@@ -258,7 +252,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
             Schema inner = ap.getItems();
             return "[]" + getTypeDeclaration(inner);
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "[string]" + getTypeDeclaration(inner);
         }
         //return super.getTypeDeclaration(p);
@@ -335,7 +329,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
         List<CodegenOperation> operations = (List<CodegenOperation>) objectMap.get("operation");
         for (CodegenOperation operation : operations) {
             // http method verb conversion (e.g. PUT => Put)
-            operation.httpMethod = camelize(operation.httpMethod.toLowerCase());
+            operation.httpMethod = camelize(operation.httpMethod.toLowerCase(Locale.ROOT));
         }
 
         // remove model imports to avoid error
@@ -389,7 +383,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
                     } else {
                         // Map optional type to dataType
                         param.vendorExtensions.put("x-optionalDataType",
-                                param.dataType.substring(0, 1).toUpperCase() + param.dataType.substring(1));
+                                param.dataType.substring(0, 1).toUpperCase(Locale.ROOT) + param.dataType.substring(1));
                     }
                 }
 
@@ -562,11 +556,11 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
 
         // for symbol, e.g. $, #
         if (getSymbolName(name) != null) {
-            return getSymbolName(name).toUpperCase();
+            return getSymbolName(name).toUpperCase(Locale.ROOT);
         }
 
         // string
-        String enumName = sanitizeName(underscore(name).toUpperCase());
+        String enumName = sanitizeName(underscore(name).toUpperCase(Locale.ROOT));
         enumName = enumName.replaceFirst("^_", "");
         enumName = enumName.replaceFirst("_$", "");
 
@@ -581,7 +575,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
 
     @Override
     public String toEnumName(CodegenProperty property) {
-        String enumName = underscore(toModelName(property.name)).toUpperCase();
+        String enumName = underscore(toModelName(property.name)).toUpperCase(Locale.ROOT);
 
         // remove [] for array or map of enum
         enumName = enumName.replace("[]", "");

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractJavaCodegen.java

@@ -49,6 +49,7 @@ import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;
+import java.util.Locale;
 import java.util.Map;
 import java.util.regex.Pattern;
 
@@ -564,7 +565,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
         // sanitize name
         name = sanitizeName(name, "\\W-[\\$]"); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.
 
-        if (name.toLowerCase().matches("^_*class$")) {
+        if (name.toLowerCase(Locale.ROOT).matches("^_*class$")) {
             return "propertyClass";
         }
 
@@ -578,7 +579,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
         }
 
         if (startsWithTwoUppercaseLetters(name)) {
-            name = name.substring(0, 2).toLowerCase() + name.substring(2);
+            name = name.substring(0, 2).toLowerCase(Locale.ROOT) + name.substring(2);
         }
 
         // If name contains special chars -> replace them.
@@ -604,7 +605,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
     private boolean startsWithTwoUppercaseLetters(String name) {
         boolean startsWithTwoUppercaseLetters = false;
         if (name.length() > 1) {
-            startsWithTwoUppercaseLetters = name.substring(0, 2).equals(name.substring(0, 2).toUpperCase());
+            startsWithTwoUppercaseLetters = name.substring(0, 2).equals(name.substring(0, 2).toUpperCase(Locale.ROOT));
         }
         return startsWithTwoUppercaseLetters;
     }
@@ -679,7 +680,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
             }
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             if (inner == null) {
                 LOGGER.warn(p.getName() + "(map property) does not have a proper inner type defined. Default to string");
                 inner = new StringSchema().description("TODO default missing array inner type to string");
@@ -720,7 +721,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
                 }
             }
 
-            return String.format(pattern, typeDeclaration);
+            return String.format(Locale.ROOT, pattern, typeDeclaration);
         } else if (ModelUtils.isMapSchema(p)) {
             final String pattern;
             if (fullJavaUtil) {
@@ -728,11 +729,11 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
             } else {
                 pattern = "new HashMap<%s>()";
             }
-            if (p.getAdditionalProperties() == null) {
+            if (ModelUtils.getAdditionalProperties(p) == null) {
                 return null;
             }
 
-            String typeDeclaration = String.format("String, %s", getTypeDeclaration((Schema) p.getAdditionalProperties()));
+            String typeDeclaration = String.format(Locale.ROOT, "String, %s", getTypeDeclaration(ModelUtils.getAdditionalProperties(p)));
             Object java8obj = additionalProperties.get("java8");
             if (java8obj != null) {
                 Boolean java8 = Boolean.valueOf(java8obj.toString());
@@ -741,7 +742,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
                 }
             }
 
-            return String.format(pattern, typeDeclaration);
+            return String.format(Locale.ROOT, pattern, typeDeclaration);
         } else if (ModelUtils.isIntegerSchema(p)) {
             if (p.getDefault() != null) {
                 if (SchemaTypeUtil.INTEGER64_FORMAT.equals(p.getFormat())) {
@@ -1049,7 +1050,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
 
         // for symbol, e.g. $, #
         if (getSymbolName(value) != null) {
-            return getSymbolName(value).toUpperCase();
+            return getSymbolName(value).toUpperCase(Locale.ROOT);
         }
 
         // number
@@ -1063,7 +1064,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
         }
 
         // string
-        String var = value.replaceAll("\\W+", "_").toUpperCase();
+        String var = value.replaceAll("\\W+", "_").toUpperCase(Locale.ROOT);
         if (var.matches("\\d.*")) {
             return "_" + var;
         } else {

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractKotlinCodegen.java

@@ -17,16 +17,13 @@
 
 package org.openapitools.codegen.languages;
 
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenConstants;
 import org.openapitools.codegen.DefaultCodegen;
 import org.openapitools.codegen.utils.ModelUtils;
-import io.swagger.v3.oas.models.OpenAPI;
-import io.swagger.v3.oas.models.Operation;
-import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.oas.models.responses.ApiResponse;
-
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -34,6 +31,7 @@ import java.io.File;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Locale;
 import java.util.Map;
 
 public abstract class AbstractKotlinCodegen extends DefaultCodegen implements CodegenConfig {
@@ -220,7 +218,7 @@ public abstract class AbstractKotlinCodegen extends DefaultCodegen implements Co
     @Override
     public String escapeReservedWord(String name) {
         // TODO: Allow enum escaping as an option (e.g. backticks vs append/prepend underscore vs match model property escaping).
-        return String.format("`%s`", name);
+        return String.format(Locale.ROOT, "`%s`", name);
     }
 
     @Override
@@ -282,7 +280,7 @@ public abstract class AbstractKotlinCodegen extends DefaultCodegen implements Co
         if (ModelUtils.isArraySchema(p)) {
             return getArrayTypeDeclaration((ArraySchema) p);
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
 
             // Maps will be keyed only by primitive Kotlin string
             return getSchemaType(p) + "<kotlin.String, " + getTypeDeclaration(inner) + ">";
@@ -414,7 +412,7 @@ public abstract class AbstractKotlinCodegen extends DefaultCodegen implements Co
                 modified = underscore(modified);
                 break;
             case UPPERCASE:
-                modified = modified.toUpperCase();
+                modified = modified.toUpperCase(Locale.ROOT);
                 break;
         }
 
@@ -536,7 +534,7 @@ public abstract class AbstractKotlinCodegen extends DefaultCodegen implements Co
     }
 
     private String titleCase(final String input) {
-        return input.substring(0, 1).toUpperCase() + input.substring(1);
+        return input.substring(0, 1).toUpperCase(Locale.ROOT) + input.substring(1);
     }
 
     @Override

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractPhpCodegen.java

@@ -1,5 +1,4 @@
-/*
+/*ap Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
- * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
  * Copyright 2018 SmartBear Software
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -17,6 +16,9 @@
 
 package org.openapitools.codegen.languages;
 
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenConstants;
@@ -24,23 +26,20 @@ import org.openapitools.codegen.CodegenOperation;
 import org.openapitools.codegen.CodegenParameter;
 import org.openapitools.codegen.CodegenProperty;
 import org.openapitools.codegen.DefaultCodegen;
+import org.openapitools.codegen.SupportingFile;
 import org.openapitools.codegen.utils.ModelUtils;
-
+import org.slf4j.Logger;
-import io.swagger.v3.oas.models.media.*;
+import org.slf4j.LoggerFactory;
 
 import java.io.File;
 import java.util.Arrays;
 import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
 import java.util.regex.Matcher;
 
-import org.apache.commons.lang3.StringUtils;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 public abstract class AbstractPhpCodegen extends DefaultCodegen implements CodegenConfig {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(AbstractPhpCodegen.class);
@@ -238,6 +237,9 @@ public abstract class AbstractPhpCodegen extends DefaultCodegen implements Codeg
 
         // apache v2 license
         // supportingFiles.add(new SupportingFile("LICENSE", "", "LICENSE"));
+
+        // all PHP codegens requires Composer, it means that we need to exclude from SVN at least vendor folder
+        supportingFiles.add(new SupportingFile(".gitignore", "", ".gitignore"));
     }
 
     public String getPackageName() {
@@ -328,7 +330,7 @@ public abstract class AbstractPhpCodegen extends DefaultCodegen implements Codeg
             Schema inner = ap.getItems();
             return getTypeDeclaration(inner) + "[]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "[string," + getTypeDeclaration(inner) + "]";
         } else if (StringUtils.isNotBlank(p.get$ref())) { // model
             String type = super.getTypeDeclaration(p);
@@ -623,7 +625,7 @@ public abstract class AbstractPhpCodegen extends DefaultCodegen implements Codeg
 
         // for symbol, e.g. $, #
         if (getSymbolName(name) != null) {
-            return (getSymbolName(name)).toUpperCase();
+            return (getSymbolName(name)).toUpperCase(Locale.ROOT);
         }
 
         // number
@@ -636,7 +638,7 @@ public abstract class AbstractPhpCodegen extends DefaultCodegen implements Codeg
         }
 
         // string
-        String enumName = sanitizeName(underscore(name).toUpperCase());
+        String enumName = sanitizeName(underscore(name).toUpperCase(Locale.ROOT));
         enumName = enumName.replaceFirst("^_", "");
         enumName = enumName.replaceFirst("_$", "");
 
@@ -649,7 +651,7 @@ public abstract class AbstractPhpCodegen extends DefaultCodegen implements Codeg
 
     @Override
     public String toEnumName(CodegenProperty property) {
-        String enumName = underscore(toModelName(property.name)).toUpperCase();
+        String enumName = underscore(toModelName(property.name)).toUpperCase(Locale.ROOT);
 
         // remove [] for array or map of enum
         enumName = enumName.replace("[]", "");

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractRubyCodegen.java

@@ -19,12 +19,14 @@ package org.openapitools.codegen.languages;
 
 import io.swagger.v3.oas.models.media.ArraySchema;
 import io.swagger.v3.oas.models.media.Schema;
-import org.openapitools.codegen.*;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.DefaultCodegen;
 import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.Arrays;
+import java.util.Locale;
 
 abstract class AbstractRubyCodegen extends DefaultCodegen implements CodegenConfig {
     private static final Logger LOGGER = LoggerFactory.getLogger(AbstractRubyCodegen.class);
@@ -88,7 +90,7 @@ abstract class AbstractRubyCodegen extends DefaultCodegen implements CodegenConf
             Schema inner = ((ArraySchema) schema).getItems();
             return getSchemaType(schema) + "<" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(schema)) {
-            Schema inner = (Schema) schema.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(schema);
             return getSchemaType(schema) + "<String, " + getTypeDeclaration(inner) + ">";
         }
 
@@ -116,7 +118,7 @@ abstract class AbstractRubyCodegen extends DefaultCodegen implements CodegenConf
         name = sanitizeName(name); // FIXME: a parameter should not be assigned. Also declare the methods parameters as 'final'.
         // if it's all uppper case, convert to lower case
         if (name.matches("^[A-Z_]*$")) {
-            name = name.toLowerCase();
+            name = name.toLowerCase(Locale.ROOT);
         }
 
         // camelize (lower first character) the variable name

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractScalaCodegen.java

@@ -181,7 +181,7 @@ public abstract class AbstractScalaCodegen extends DefaultCodegen {
             Schema inner = ap.getItems();
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
 
             return getSchemaType(p) + "[String, " + getTypeDeclaration(inner) + "]";
         }
@@ -206,7 +206,7 @@ public abstract class AbstractScalaCodegen extends DefaultCodegen {
     @Override
     public String toInstantiationType(Schema p) {
         if (ModelUtils.isMapSchema(p)) {
-            String inner = getSchemaType((Schema) p.getAdditionalProperties());
+            String inner = getSchemaType(ModelUtils.getAdditionalProperties(p));
             return instantiationTypes.get("map") + "[String, " + inner + "]";
         } else if (ModelUtils.isArraySchema(p)) {
             ArraySchema ap = (ArraySchema) p;
@@ -235,7 +235,7 @@ public abstract class AbstractScalaCodegen extends DefaultCodegen {
         } else if (ModelUtils.isIntegerSchema(p)) {
             return null;
         } else if (ModelUtils.isMapSchema(p)) {
-            String inner = getSchemaType((Schema) p.getAdditionalProperties());
+            String inner = getSchemaType(ModelUtils.getAdditionalProperties(p));
             return "new HashMap[String, " + inner + "]() ";
         } else if (ModelUtils.isArraySchema(p)) {
             ArraySchema ap = (ArraySchema) p;

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AbstractTypeScriptClientCodegen.java

@@ -227,7 +227,7 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
             Schema inner = ap.getItems();
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return "{ [key: string]: " + getTypeDeclaration(inner) + "; }";
         } else if (ModelUtils.isFileSchema(p)) {
             return "any";
@@ -246,7 +246,7 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
             inner = mp1.getItems();
             return this.getSchemaType(p) + "<" + this.getParameterDataType(parameter, inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            inner = (Schema) p.getAdditionalProperties();
+            inner = ModelUtils.getAdditionalProperties(p);
             return "{ [key: string]: " + this.getParameterDataType(parameter, inner) + "; }";
         } else if (ModelUtils.isStringSchema(p)) {
             // Handle string enums

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AdaCodegen.java

@@ -17,14 +17,18 @@
 
 package org.openapitools.codegen.languages;
 
+import com.samskivert.mustache.Mustache;
+import com.samskivert.mustache.Template;
+import org.apache.commons.lang3.StringUtils;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenConstants;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.SupportingFile;
+
 import java.io.File;
 import java.io.IOException;
 import java.io.Writer;
-
+import java.util.Locale;
-import org.apache.commons.lang3.StringUtils;
-import com.samskivert.mustache.Mustache;
-import com.samskivert.mustache.Template;
-import org.openapitools.codegen.*;
 
 public class AdaCodegen extends AbstractAdaCodegen implements CodegenConfig {
 
@@ -71,7 +75,7 @@ public class AdaCodegen extends AbstractAdaCodegen implements CodegenConfig {
             // e.g. petstore.api (package name) => petstore_api (project name)
             projectName = packageName.replaceAll("\\.", "_");
         }
-        String configBaseName = modelPackage.toLowerCase();
+        String configBaseName = modelPackage.toLowerCase(Locale.ROOT);
         supportingFiles.add(new SupportingFile("gnat-project.mustache", "", toFilename(projectName) + ".gpr"));
         // supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
         supportingFiles.add(new SupportingFile("config.gpr", "", "config.gpr"));

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AdaServerCodegen.java

@@ -19,7 +19,6 @@ package org.openapitools.codegen.languages;
 
 import com.samskivert.mustache.Mustache;
 import com.samskivert.mustache.Template;
-
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenConstants;
 import org.openapitools.codegen.CodegenType;
@@ -28,6 +27,7 @@ import org.openapitools.codegen.SupportingFile;
 import java.io.File;
 import java.io.IOException;
 import java.io.Writer;
+import java.util.Locale;
 
 public class AdaServerCodegen extends AbstractAdaCodegen implements CodegenConfig {
 
@@ -76,7 +76,7 @@ public class AdaServerCodegen extends AbstractAdaCodegen implements CodegenConfi
             // e.g. petstore.api (package name) => petstore_api (project name)
             projectName = packageName.replaceAll("\\.", "_");
         }
-        String configBaseName = modelPackage.toLowerCase();
+        String configBaseName = modelPackage.toLowerCase(Locale.ROOT);
         supportingFiles.add(new SupportingFile("gnat-project.mustache", "", toFilename(projectName) + ".gpr"));
         supportingFiles.add(new SupportingFile("README.mustache", "", "README.md"));
         supportingFiles.add(new SupportingFile("config.gpr", "", "config.gpr"));

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AndroidClientCodegen.java

@@ -189,7 +189,7 @@ public class AndroidClientCodegen extends DefaultCodegen implements CodegenConfi
             Schema inner = ap.getItems();
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
 
             return getSchemaType(p) + "<String, " + getTypeDeclaration(inner) + ">";
         }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ApexClientCodegen.java

@@ -217,6 +217,7 @@ public class ApexClientCodegen extends AbstractApexCodegen {
         if (ModelUtils.isArraySchema(p)) {
             Schema inner = ((ArraySchema) p).getItems();
             out = String.format(
+                    Locale.ROOT,
                     "new List<%s>()",
                     inner == null ? "Object" : getTypeDeclaration(inner)
             );
@@ -227,14 +228,14 @@ public class ApexClientCodegen extends AbstractApexCodegen {
             Long def = (Long) p.getDefault();
             out = def == null ? out : def.toString() + "L";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             String s = inner == null ? "Object" : getTypeDeclaration(inner);
-            out = String.format("new Map<String, %s>()", s);
+            out = String.format(Locale.ROOT, "new Map<String, %s>()", s);
         } else if (ModelUtils.isStringSchema(p)) {
             if (p.getDefault() != null) {
                 String def = p.getDefault().toString();
                 if (def != null) {
-                    out = p.getEnum() == null ? String.format("'%s'", escapeText(def)) : def;
+                    out = p.getEnum() == null ? String.format(Locale.ROOT, "'%s'", escapeText(def)) : def;
                 }
             }
         } else {
@@ -270,7 +271,7 @@ public class ApexClientCodegen extends AbstractApexCodegen {
         if (apiVersion.matches("^\\d{2}(\\.0)?$")) {
             return apiVersion.substring(0, 2) + ".0";
         } else {
-            LOGGER.warn(String.format("specified API version is invalid: %s - defaulting to %s", apiVersion, this.apiVersion));
+            LOGGER.warn(String.format(Locale.ROOT, "specified API version is invalid: %s - defaulting to %s", apiVersion, this.apiVersion));
             return this.apiVersion;
         }
     }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/AspNetCoreServerCodegen.java

@@ -17,21 +17,21 @@
 
 package org.openapitools.codegen.languages;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
-
 import com.samskivert.mustache.Mustache;
-
 import io.swagger.v3.oas.models.OpenAPI;
-
+import org.openapitools.codegen.CodegenConstants;
-import org.openapitools.codegen.*;
+import org.openapitools.codegen.CodegenOperation;
-import org.openapitools.codegen.utils.ModelUtils;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.SupportingFile;
 import org.openapitools.codegen.utils.URLPathUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.File;
 import java.net.URL;
-import java.util.*;
+import java.util.Arrays;
+import java.util.Locale;
+import java.util.Map;
 
 import static java.util.UUID.randomUUID;
 
@@ -39,7 +39,7 @@ public class AspNetCoreServerCodegen extends AbstractCSharpCodegen {
 
     public static final String USE_SWASHBUCKLE = "useSwashbuckle";
 
-    private String packageGuid = "{" + randomUUID().toString().toUpperCase() + "}";
+    private String packageGuid = "{" + randomUUID().toString().toUpperCase(Locale.ROOT) + "}";
 
     @SuppressWarnings("hiding")
     protected Logger LOGGER = LoggerFactory.getLogger(AspNetCoreServerCodegen.class);
@@ -141,7 +141,7 @@ public class AspNetCoreServerCodegen extends AbstractCSharpCodegen {
             additionalProperties.put(USE_SWASHBUCKLE, useSwashbuckle);
         }
 
-        additionalProperties.put("dockerTag", packageName.toLowerCase());
+        additionalProperties.put("dockerTag", packageName.toLowerCase(Locale.ROOT));
 
         apiPackage = packageName + ".Controllers";
         modelPackage = packageName + ".Models";
@@ -211,7 +211,7 @@ public class AspNetCoreServerCodegen extends AbstractCSharpCodegen {
         }
 
         // Converts, for example, PUT to HttpPut for controller attributes
-        operation.httpMethod = "Http" + operation.httpMethod.substring(0, 1) + operation.httpMethod.substring(1).toLowerCase();
+        operation.httpMethod = "Http" + operation.httpMethod.substring(0, 1) + operation.httpMethod.substring(1).toLowerCase(Locale.ROOT);
     }
 
     @Override

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/BashClientCodegen.java

@@ -388,7 +388,7 @@ public class BashClientCodegen extends DefaultCodegen implements CodegenConfig {
             Schema inner = ap.getItems();
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "[String, " + getTypeDeclaration(inner) + "]";
         }
         return super.getTypeDeclaration(p);
@@ -637,7 +637,7 @@ public class BashClientCodegen extends DefaultCodegen implements CodegenConfig {
                                 mapper.writerWithDefaultPrettyPrinter().writeValueAsString(
                                         definitions.get(p.dataType).getExample()));
                     } catch (JsonProcessingException e) {
-                        e.printStackTrace();
+                        LOGGER.warn(e.getMessage(), e);
                     }
                 } else {
                     /**

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CSharpClientCodegen.java

@@ -17,13 +17,9 @@
 
 package org.openapitools.codegen.languages;
 
-import static org.apache.commons.lang3.StringUtils.isEmpty;
-
 import com.google.common.collect.ImmutableMap;
 import com.samskivert.mustache.Mustache;
-
 import io.swagger.v3.oas.models.media.Schema;
-
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConstants;
 import org.openapitools.codegen.CodegenModel;
@@ -40,8 +36,11 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
+import static org.apache.commons.lang3.StringUtils.isEmpty;
+
 public class CSharpClientCodegen extends AbstractCSharpCodegen {
     @SuppressWarnings({"hiding"})
     private static final Logger LOGGER = LoggerFactory.getLogger(CSharpClientCodegen.class);
@@ -57,7 +56,7 @@ public class CSharpClientCodegen extends AbstractCSharpCodegen {
     // Defines the sdk option for targeted frameworks, which differs from targetFramework and targetFrameworkNuget
     private static final String MCS_NET_VERSION_KEY = "x-mcs-sdk";
 
-    protected String packageGuid = "{" + java.util.UUID.randomUUID().toString().toUpperCase() + "}";
+    protected String packageGuid = "{" + java.util.UUID.randomUUID().toString().toUpperCase(Locale.ROOT) + "}";
     protected String clientPackage = "Org.OpenAPITools.Client";
     protected String localVariablePrefix = "";
     protected String apiDocPath = "docs/";

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CSharpNancyFXServerCodegen.java

@@ -17,17 +17,24 @@
 
 package org.openapitools.codegen.languages;
 
-import static com.google.common.base.Strings.isNullOrEmpty;
+import com.google.common.base.Predicate;
-import static org.apache.commons.lang3.StringUtils.capitalize;
+import com.google.common.collect.ArrayListMultimap;
-import static org.openapitools.codegen.CodegenConstants.*;
+import com.google.common.collect.BiMap;
-import static org.openapitools.codegen.CodegenType.SERVER;
+import com.google.common.collect.HashBiMap;
-import static java.util.Arrays.asList;
+import com.google.common.collect.ImmutableMap;
-import static java.util.UUID.randomUUID;
+import com.google.common.collect.ImmutableSet;
-
+import com.google.common.collect.Multimap;
-import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.OpenAPI;
-import org.openapitools.codegen.utils.*;
+import io.swagger.v3.oas.models.media.Schema;
-import io.swagger.v3.oas.models.*;
+import org.openapitools.codegen.CodegenModel;
-import io.swagger.v3.oas.models.media.*;
+import org.openapitools.codegen.CodegenOperation;
+import org.openapitools.codegen.CodegenProperty;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.SupportingFile;
+import org.openapitools.codegen.utils.ModelUtils;
+import org.openapitools.codegen.utils.URLPathUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.File;
 import java.net.URL;
@@ -36,20 +43,34 @@ import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Set;
 
-import org.slf4j.Logger;
+import static com.google.common.base.Strings.isNullOrEmpty;
-import org.slf4j.LoggerFactory;
+import static java.util.Arrays.asList;
-
+import static java.util.UUID.randomUUID;
-import com.google.common.base.Predicate;
+import static org.apache.commons.lang3.StringUtils.capitalize;
-import com.google.common.collect.ArrayListMultimap;
+import static org.openapitools.codegen.CodegenConstants.INTERFACE_PREFIX;
-import com.google.common.collect.BiMap;
+import static org.openapitools.codegen.CodegenConstants.INTERFACE_PREFIX_DESC;
-import com.google.common.collect.HashBiMap;
+import static org.openapitools.codegen.CodegenConstants.OPTIONAL_PROJECT_FILE;
-import com.google.common.collect.ImmutableMap;
+import static org.openapitools.codegen.CodegenConstants.OPTIONAL_PROJECT_FILE_DESC;
-import com.google.common.collect.ImmutableSet;
+import static org.openapitools.codegen.CodegenConstants.OPTIONAL_PROJECT_GUID;
-import com.google.common.collect.Multimap;
+import static org.openapitools.codegen.CodegenConstants.OPTIONAL_PROJECT_GUID_DESC;
+import static org.openapitools.codegen.CodegenConstants.PACKAGE_NAME;
+import static org.openapitools.codegen.CodegenConstants.PACKAGE_VERSION;
+import static org.openapitools.codegen.CodegenConstants.RETURN_ICOLLECTION;
+import static org.openapitools.codegen.CodegenConstants.RETURN_ICOLLECTION_DESC;
+import static org.openapitools.codegen.CodegenConstants.SORT_PARAMS_BY_REQUIRED_FLAG;
+import static org.openapitools.codegen.CodegenConstants.SORT_PARAMS_BY_REQUIRED_FLAG_DESC;
+import static org.openapitools.codegen.CodegenConstants.SOURCE_FOLDER;
+import static org.openapitools.codegen.CodegenConstants.SOURCE_FOLDER_DESC;
+import static org.openapitools.codegen.CodegenConstants.USE_COLLECTION;
+import static org.openapitools.codegen.CodegenConstants.USE_COLLECTION_DESC;
+import static org.openapitools.codegen.CodegenConstants.USE_DATETIME_OFFSET;
+import static org.openapitools.codegen.CodegenConstants.USE_DATETIME_OFFSET_DESC;
+import static org.openapitools.codegen.CodegenType.SERVER;
 
 public class CSharpNancyFXServerCodegen extends AbstractCSharpCodegen {
     private static final Logger LOGGER = LoggerFactory.getLogger(CSharpNancyFXServerCodegen.class);
@@ -64,7 +85,7 @@ public class CSharpNancyFXServerCodegen extends AbstractCSharpCodegen {
     private static final Map<String, Predicate<Schema>> propertyToOpenAPITypeMapping =
             createPropertyToOpenAPITypeMapping();
 
-    private String packageGuid = "{" + randomUUID().toString().toUpperCase() + "}";
+    private String packageGuid = "{" + randomUUID().toString().toUpperCase(Locale.ROOT) + "}";
 
     private final Map<String, DependencyInfo> dependencies = new HashMap<>();
     private final Set<String> parentModels = new HashSet<>();
@@ -185,18 +206,18 @@ public class CSharpNancyFXServerCodegen extends AbstractCSharpCodegen {
             final String assemblyFramework = namespaceInfo.length > 3 ? namespaceInfo[3].trim() : "net45";
 
             if (isNullOrEmpty(model) || isNullOrEmpty(namespaceName)) {
-                LOGGER.warn(String.format("Could not import: '%s' - invalid namespace: '%s'", model, entry.getValue()));
+                LOGGER.warn(String.format(Locale.ROOT, "Could not import: '%s' - invalid namespace: '%s'", model, entry.getValue()));
                 importMapping.remove(model);
             } else {
-                LOGGER.info(String.format("Importing: '%s' from '%s' namespace.", model, namespaceName));
+                LOGGER.info(String.format(Locale.ROOT, "Importing: '%s' from '%s' namespace.", model, namespaceName));
                 importMapping.put(model, namespaceName);
             }
             if (!isNullOrEmpty(modelClass)) {
-                LOGGER.info(String.format("Mapping: '%s' class to '%s'", model, modelClass));
+                LOGGER.info(String.format(Locale.ROOT, "Mapping: '%s' class to '%s'", model, modelClass));
                 modelNameMapping.put(model, modelClass);
             }
             if (assembly != null && assemblyVersion != null) {
-                LOGGER.info(String.format("Adding dependency: '%s', version: '%s', framework: '%s'",
+                LOGGER.info(String.format(Locale.ROOT, "Adding dependency: '%s', version: '%s', framework: '%s'",
                         assembly, assemblyVersion, assemblyVersion));
                 dependencies.put(assembly, new DependencyInfo(assemblyVersion, assemblyFramework));
             }
@@ -248,7 +269,7 @@ public class CSharpNancyFXServerCodegen extends AbstractCSharpCodegen {
             operation.path = operation.path.replace("?", "/");
         }
         if (!isNullOrEmpty(operation.httpMethod)) {
-            operation.httpMethod = capitalize(operation.httpMethod.toLowerCase());
+            operation.httpMethod = capitalize(operation.httpMethod.toLowerCase(Locale.ROOT));
         }
     }
 
@@ -280,7 +301,7 @@ public class CSharpNancyFXServerCodegen extends AbstractCSharpCodegen {
         for (final CodegenProperty property : parent.vars) {
             final CodegenProperty duplicatedByParent = childPropertiesByName.get(property.name);
             if (duplicatedByParent != null) {
-                LOGGER.info(String.format("Property: '%s' in '%s' model is inherited from '%s'",
+                LOGGER.info(String.format(Locale.ROOT, "Property: '%s' in '%s' model is inherited from '%s'",
                         property.name, child.classname, parent.classname));
                 duplicatedByParent.isInherited = true;
                 final CodegenProperty parentVar = duplicatedByParent.clone();
@@ -322,7 +343,7 @@ public class CSharpNancyFXServerCodegen extends AbstractCSharpCodegen {
         } else {
             result = enumName;
         }
-        LOGGER.debug(String.format("toEnumVarName('%s', %s) = '%s'", name, datatype, enumName));
+        LOGGER.debug(String.format(Locale.ROOT, "toEnumVarName('%s', %s) = '%s'", name, datatype, enumName));
         return result;
     }
 
@@ -334,7 +355,7 @@ public class CSharpNancyFXServerCodegen extends AbstractCSharpCodegen {
         } else {
             apiName = capitalize(name);
         }
-        LOGGER.debug(String.format("toApiName('%s') = '%s'", name, apiName));
+        LOGGER.debug(String.format(Locale.ROOT, "toApiName('%s') = '%s'", name, apiName));
         return apiName;
     }
 
@@ -355,7 +376,7 @@ public class CSharpNancyFXServerCodegen extends AbstractCSharpCodegen {
         } else {
             result = null;
         }
-        LOGGER.debug(String.format("toModelImport('%s') = '%s'", name, result));
+        LOGGER.debug(String.format(Locale.ROOT, "toModelImport('%s') = '%s'", name, result));
         return result;
     }
 

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ClojureClientCodegen.java

@@ -17,6 +17,11 @@
 
 package org.openapitools.codegen.languages;
 
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.info.Contact;
+import io.swagger.v3.oas.models.info.Info;
+import io.swagger.v3.oas.models.info.License;
+import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenConstants;
@@ -24,16 +29,11 @@ import org.openapitools.codegen.CodegenOperation;
 import org.openapitools.codegen.CodegenType;
 import org.openapitools.codegen.DefaultCodegen;
 import org.openapitools.codegen.SupportingFile;
-import io.swagger.v3.oas.models.OpenAPI;
-import io.swagger.v3.oas.models.Operation;
-import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.oas.models.info.*;
-
-import org.apache.commons.lang3.StringUtils;
 
 import java.io.File;
-import java.util.Map;
 import java.util.List;
+import java.util.Locale;
+import java.util.Map;
 
 public class ClojureClientCodegen extends DefaultCodegen implements CodegenConfig {
     private static final String PROJECT_NAME = "projectName";
@@ -221,7 +221,7 @@ public class ClojureClientCodegen extends DefaultCodegen implements CodegenConfi
         List<CodegenOperation> ops = (List<CodegenOperation>) objs.get("operation");
         for (CodegenOperation op : ops) {
             // Convert httpMethod to lower case, e.g. "get", "post"
-            op.httpMethod = op.httpMethod.toLowerCase();
+            op.httpMethod = op.httpMethod.toLowerCase(Locale.ROOT);
         }
         return operations;
     }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ConfluenceWikiCodegen.java

@@ -19,7 +19,6 @@ package org.openapitools.codegen.languages;
 
 import io.swagger.v3.oas.models.media.ArraySchema;
 import io.swagger.v3.oas.models.media.Schema;
-
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenConstants;
@@ -32,6 +31,7 @@ import org.openapitools.codegen.utils.ModelUtils;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 public class ConfluenceWikiCodegen extends DefaultCodegen implements CodegenConfig {
@@ -99,7 +99,7 @@ public class ConfluenceWikiCodegen extends DefaultCodegen implements CodegenConf
             Schema inner = ap.getItems();
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "[String, " + getTypeDeclaration(inner) + "]";
         }
         return super.getTypeDeclaration(p);
@@ -110,7 +110,7 @@ public class ConfluenceWikiCodegen extends DefaultCodegen implements CodegenConf
         Map<String, Object> operations = (Map<String, Object>) objs.get("operations");
         List<CodegenOperation> operationList = (List<CodegenOperation>) operations.get("operation");
         for (CodegenOperation op : operationList) {
-            op.httpMethod = op.httpMethod.toLowerCase();
+            op.httpMethod = op.httpMethod.toLowerCase(Locale.ROOT);
         }
         return objs;
     }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppPistacheServerCodegen.java

@@ -22,7 +22,6 @@ import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.media.ArraySchema;
 import io.swagger.v3.oas.models.media.Schema;
 import io.swagger.v3.oas.models.responses.ApiResponse;
-
 import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CodegenModel;
 import org.openapitools.codegen.CodegenOperation;
@@ -38,6 +37,7 @@ import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 
@@ -198,8 +198,8 @@ public class CppPistacheServerCodegen extends AbstractCppCodegen {
     public Map<String, Object> postProcessOperationsWithModels(Map<String, Object> objs, List<Object> allModels) {
         Map<String, Object> operations = (Map<String, Object>) objs.get("operations");
         String classname = (String) operations.get("classname");
-        operations.put("classnameSnakeUpperCase", DefaultCodegen.underscore(classname).toUpperCase());
+        operations.put("classnameSnakeUpperCase", DefaultCodegen.underscore(classname).toUpperCase(Locale.ROOT));
-        operations.put("classnameSnakeLowerCase", DefaultCodegen.underscore(classname).toLowerCase());
+        operations.put("classnameSnakeLowerCase", DefaultCodegen.underscore(classname).toLowerCase(Locale.ROOT));
 
         List<CodegenOperation> operationList = (List<CodegenOperation>) operations.get("operation");
         for (CodegenOperation op : operationList) {
@@ -220,7 +220,7 @@ public class CppPistacheServerCodegen extends AbstractCppCodegen {
                 }
             }
 
-            op.httpMethod = op.httpMethod.substring(0, 1).toUpperCase() + op.httpMethod.substring(1).toLowerCase();
+            op.httpMethod = op.httpMethod.substring(0, 1).toUpperCase(Locale.ROOT) + op.httpMethod.substring(1).toLowerCase(Locale.ROOT);
 
             for (CodegenParameter param : op.allParams) {
                 if (param.isFormParam) isParsingSupported = false;
@@ -305,7 +305,7 @@ public class CppPistacheServerCodegen extends AbstractCppCodegen {
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
         }
         if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "<std::string, " + getTypeDeclaration(inner) + ">";
         }
         else if (ModelUtils.isByteArraySchema(p)) {
@@ -343,7 +343,7 @@ public class CppPistacheServerCodegen extends AbstractCppCodegen {
         else if (ModelUtils.isByteArraySchema(p)) {
             return "\"\"";
         } else if (ModelUtils.isMapSchema(p)) {
-            String inner = getSchemaType((Schema) p.getAdditionalProperties());
+            String inner = getSchemaType(ModelUtils.getAdditionalProperties(p));
             return "std::map<std::string, " + inner + ">()";
         } else if (ModelUtils.isArraySchema(p)) {
             ArraySchema ap = (ArraySchema) p;

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQt5ClientCodegen.java

@@ -17,12 +17,15 @@
 
 package org.openapitools.codegen.languages;
 
-import org.apache.commons.lang3.StringUtils;
+import io.swagger.v3.oas.models.media.ArraySchema;
-import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.media.Schema;
-import org.openapitools.codegen.utils.ModelUtils;
-
-import io.swagger.v3.oas.models.media.*;
 import io.swagger.v3.parser.util.SchemaTypeUtil;
+import org.apache.commons.lang3.StringUtils;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenConstants;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.SupportingFile;
+import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -30,6 +33,7 @@ import java.io.File;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 
@@ -294,7 +298,7 @@ public class CppQt5ClientCodegen extends AbstractCppCodegen implements CodegenCo
             Schema inner = ap.getItems();
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">*";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "<QString, " + getTypeDeclaration(inner) + ">*";
         }
         if (foundationClasses.contains(openAPIType)) {
@@ -325,7 +329,7 @@ public class CppQt5ClientCodegen extends AbstractCppCodegen implements CodegenCo
             }
             return "0";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return "new QMap<QString, " + getTypeDeclaration(inner) + ">()";
         } else if (ModelUtils.isArraySchema(p)) {
             ArraySchema ap = (ArraySchema) p;
@@ -371,7 +375,7 @@ public class CppQt5ClientCodegen extends AbstractCppCodegen implements CodegenCo
 
         // if it's all uppper case, convert to lower case
         if (varName.matches("^[A-Z_]*$")) {
-            varName = varName.toLowerCase();
+            varName = varName.toLowerCase(Locale.ROOT);
         }
 
         // camelize (lower first character) the variable name

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppQt5QHttpEngineServerCodegen.java

@@ -17,12 +17,14 @@
 
 package org.openapitools.codegen.languages;
 
-import org.apache.commons.lang3.StringUtils;
+import io.swagger.v3.oas.models.media.ArraySchema;
-import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.media.Schema;
-import org.openapitools.codegen.utils.ModelUtils;
-
-import io.swagger.v3.oas.models.media.*;
 import io.swagger.v3.parser.util.SchemaTypeUtil;
+import org.apache.commons.lang3.StringUtils;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.SupportingFile;
+import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -30,6 +32,7 @@ import java.io.File;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 
@@ -323,7 +326,7 @@ public class CppQt5QHttpEngineServerCodegen extends AbstractCppCodegen implement
             Schema inner = ap.getItems();
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "<QString, " + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isBinarySchema(p)) {
             return getSchemaType(p) + "*";
@@ -359,7 +362,7 @@ public class CppQt5QHttpEngineServerCodegen extends AbstractCppCodegen implement
             }
             return "0";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return "QMap<QString, " + getTypeDeclaration(inner) + ">()";
         } else if (ModelUtils.isArraySchema(p)) {
             ArraySchema ap = (ArraySchema) p;
@@ -407,7 +410,7 @@ public class CppQt5QHttpEngineServerCodegen extends AbstractCppCodegen implement
 
         // if it's all uppper case, convert to lower case
         if (varName.matches("^[A-Z_]*$")) {
-            varName = varName.toLowerCase();
+            varName = varName.toLowerCase(Locale.ROOT);
         }
 
         // camelize (lower first character) the variable name

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppRestSdkClientCodegen.java

@@ -17,17 +17,13 @@
 
 package org.openapitools.codegen.languages;
 
-import static com.google.common.base.Strings.isNullOrEmpty;
-
 import com.google.common.collect.ArrayListMultimap;
 import com.google.common.collect.Multimap;
-
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.media.ArraySchema;
 import io.swagger.v3.oas.models.media.Schema;
 import io.swagger.v3.oas.models.responses.ApiResponse;
-
 import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CodegenConstants;
 import org.openapitools.codegen.CodegenModel;
@@ -42,9 +38,12 @@ import java.util.Arrays;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 
+import static com.google.common.base.Strings.isNullOrEmpty;
+
 public class CppRestSdkClientCodegen extends AbstractCppCodegen {
 
     public static final String DECLSPEC = "declspec";
@@ -189,10 +188,10 @@ public class CppRestSdkClientCodegen extends AbstractCppCodegen {
 
         additionalProperties.put("modelNamespaceDeclarations", modelPackage.split("\\."));
         additionalProperties.put("modelNamespace", modelPackage.replaceAll("\\.", "::"));
-        additionalProperties.put("modelHeaderGuardPrefix", modelPackage.replaceAll("\\.", "_").toUpperCase());
+        additionalProperties.put("modelHeaderGuardPrefix", modelPackage.replaceAll("\\.", "_").toUpperCase(Locale.ROOT));
         additionalProperties.put("apiNamespaceDeclarations", apiPackage.split("\\."));
         additionalProperties.put("apiNamespace", apiPackage.replaceAll("\\.", "::"));
-        additionalProperties.put("apiHeaderGuardPrefix", apiPackage.replaceAll("\\.", "_").toUpperCase());
+        additionalProperties.put("apiHeaderGuardPrefix", apiPackage.replaceAll("\\.", "_").toUpperCase(Locale.ROOT));
         additionalProperties.put("declspec", declspec);
         additionalProperties.put("defaultInclude", defaultInclude);
     }
@@ -308,7 +307,7 @@ public class CppRestSdkClientCodegen extends AbstractCppCodegen {
             Schema inner = ap.getItems();
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "<utility::string_t, " + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isStringSchema(p)
                 || ModelUtils.isDateSchema(p) || ModelUtils.isDateTimeSchema(p)
@@ -339,7 +338,7 @@ public class CppRestSdkClientCodegen extends AbstractCppCodegen {
             }
             return "0";
         } else if (ModelUtils.isMapSchema(p)) {
-            String inner = getSchemaType((Schema) p.getAdditionalProperties());
+            String inner = getSchemaType(ModelUtils.getAdditionalProperties(p));
             return "std::map<utility::string_t, " + inner + ">()";
         } else if (ModelUtils.isArraySchema(p)) {
             ArraySchema ap = (ArraySchema) p;

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CppRestbedServerCodegen.java

@@ -270,7 +270,7 @@ public class CppRestbedServerCodegen extends AbstractCppCodegen {
             Schema inner = ap.getItems();
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "<std::string, " + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isByteArraySchema(p)) {
             return "std::string";
@@ -307,7 +307,7 @@ public class CppRestbedServerCodegen extends AbstractCppCodegen {
         } else if (ModelUtils.isByteArraySchema(p)) {
             return "\"\"";
         } else if (ModelUtils.isMapSchema(p)) {
-            String inner = getSchemaType((Schema) p.getAdditionalProperties());
+            String inner = getSchemaType(ModelUtils.getAdditionalProperties(p));
             return "std::map<std::string, " + inner + ">()";
         } else if (ModelUtils.isArraySchema(p)) {
             ArraySchema ap = (ArraySchema) p;

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/DartClientCodegen.java

@@ -307,7 +307,7 @@ public class DartClientCodegen extends DefaultCodegen implements CodegenConfig {
             Schema inner = ap.getItems();
             return getSchemaType(p) + "<" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
 
             return getSchemaType(p) + "<String, " + getTypeDeclaration(inner) + ">";
         }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/EiffelClientCodegen.java

@@ -17,13 +17,16 @@
 
 package org.openapitools.codegen.languages;
 
-import java.io.File;
+import org.openapitools.codegen.CodegenConstants;
-import java.util.UUID;
+import org.openapitools.codegen.CodegenProperty;
-
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.SupportingFile;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import org.openapitools.codegen.*;
+import java.io.File;
+import java.util.Locale;
+import java.util.UUID;
 
 public class EiffelClientCodegen extends AbstractEiffelCodegen {
     private static final Logger LOGGER = LoggerFactory.getLogger(EiffelClientCodegen.class);
@@ -168,7 +171,7 @@ public class EiffelClientCodegen extends AbstractEiffelCodegen {
 
     @Override
     public String toEnumName(CodegenProperty property) {
-        return sanitizeName(property.name).toUpperCase() + "_ENUM";
+        return sanitizeName(property.name).toUpperCase(Locale.ROOT) + "_ENUM";
     }
 
     @Override
@@ -179,7 +182,7 @@ public class EiffelClientCodegen extends AbstractEiffelCodegen {
 
         // for symbol, e.g. $, #
         if (getSymbolName(value) != null) {
-            return getSymbolName(value).toUpperCase();
+            return getSymbolName(value).toUpperCase(Locale.ROOT);
         }
 
         // number
@@ -193,7 +196,7 @@ public class EiffelClientCodegen extends AbstractEiffelCodegen {
         }
 
         // string
-        String var = value.replaceAll("\\W+", "_").toLowerCase();
+        String var = value.replaceAll("\\W+", "_").toLowerCase(Locale.ROOT);
         if (var.matches("\\d.*")) {
             return "val_" + var;
         } else if (var.startsWith("_")) {

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ElixirClientCodegen.java

@@ -447,7 +447,7 @@ public class ElixirClientCodegen extends DefaultCodegen implements CodegenConfig
             Schema inner = ap.getItems();
             return "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return "%{optional(String.t) => " + getTypeDeclaration(inner) + "}";
         } else if (ModelUtils.isPasswordSchema(p)) {
             return "String.t";

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ElmClientCodegen.java

@@ -17,15 +17,21 @@
 
 package org.openapitools.codegen.languages;
 
-import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.NumberSchema;
+import io.swagger.v3.oas.models.media.Schema;
+import io.swagger.v3.oas.models.responses.ApiResponse;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenModel;
+import org.openapitools.codegen.CodegenOperation;
+import org.openapitools.codegen.CodegenParameter;
+import org.openapitools.codegen.CodegenProperty;
+import org.openapitools.codegen.CodegenResponse;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.DefaultCodegen;
+import org.openapitools.codegen.SupportingFile;
 import org.openapitools.codegen.utils.ModelUtils;
-import org.openapitools.codegen.languages.features.BeanValidationFeatures;
-import org.openapitools.codegen.languages.features.JbossFeature;
-import org.openapitools.codegen.languages.features.SwaggerFeatures;
-import io.swagger.v3.oas.models.*;
-import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.oas.models.parameters.*;
-import io.swagger.v3.oas.models.responses.*;
 
 import java.io.File;
 import java.text.Collator;
@@ -36,6 +42,7 @@ import java.util.Comparator;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 import java.util.TreeSet;
@@ -259,7 +266,7 @@ public class ElmClientCodegen extends DefaultCodegen implements CodegenConfig {
                 Collections.sort(parent.children, new Comparator<CodegenModel>() {
                     @Override
                     public int compare(CodegenModel cm1, CodegenModel cm2) {
-                        return Collator.getInstance().compare(cm1.classname, cm2.classname);
+                        return Collator.getInstance(Locale.ROOT).compare(cm1.classname, cm2.classname);
                     }
                 });
             }
@@ -486,7 +493,7 @@ public class ElmClientCodegen extends DefaultCodegen implements CodegenConfig {
             Schema inner = ap.getItems();
             return getTypeDeclaration(inner);
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getTypeDeclaration(inner);
         }
         return super.getTypeDeclaration(p);
@@ -506,8 +513,8 @@ public class ElmClientCodegen extends DefaultCodegen implements CodegenConfig {
     }
 
     @Override
-    public CodegenResponse fromResponse(String responseCode, ApiResponse resp) {
+    public CodegenResponse fromResponse(OpenAPI openAPI, String responseCode, ApiResponse resp) {
-        final CodegenResponse response = super.fromResponse(responseCode, resp);
+        final CodegenResponse response = super.fromResponse(openAPI, responseCode, resp);
         if (response.dataType != null) {
             addEncoderAndDecoder(response.vendorExtensions, response.dataType, response.isMapContainer, response.primitiveType);
         }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ErlangClientCodegen.java

@@ -21,6 +21,7 @@ import com.samskivert.mustache.Mustache;
 import com.samskivert.mustache.Template;
 
 import org.openapitools.codegen.*;
+import org.openapitools.codegen.mustache.JoinWithCommaLambda;
 import io.swagger.v3.oas.models.media.*;
 
 import java.io.File;
@@ -133,6 +134,8 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
     public void processOpts() {
         super.processOpts();
 
+        additionalProperties.put("joinWithComma", new JoinWithCommaLambda());
+
         if (additionalProperties.containsKey(CodegenConstants.PACKAGE_NAME)) {
             setPackageName((String) additionalProperties.get(CodegenConstants.PACKAGE_NAME));
         } else {
@@ -287,7 +290,7 @@ public class ErlangClientCodegen extends DefaultCodegen implements CodegenConfig
         Pattern pattern = Pattern.compile("\\{([^\\}]+)\\}");
         for (CodegenOperation o : os) {
             // force http method to lower case
-            o.httpMethod = o.httpMethod.toLowerCase();
+            o.httpMethod = o.httpMethod.toLowerCase(Locale.ROOT);
 
             if (o.isListContainer) {
                 o.returnType = "[" + o.returnBaseType + "]";

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/FinchServerCodegen.java

@@ -239,7 +239,7 @@ public class FinchServerCodegen extends DefaultCodegen implements CodegenConfig
             Schema inner = ap.getItems();
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
 
             return getSchemaType(p) + "[String, " + getTypeDeclaration(inner) + "]";
         }
@@ -341,7 +341,7 @@ public class FinchServerCodegen extends DefaultCodegen implements CodegenConfig
     }
 
     private void generateScalaPath(CodegenOperation op) {
-        op.httpMethod = op.httpMethod.toLowerCase();
+        op.httpMethod = op.httpMethod.toLowerCase(Locale.ROOT);
 
         String path = op.path;
 
@@ -366,7 +366,7 @@ public class FinchServerCodegen extends DefaultCodegen implements CodegenConfig
                 final CodegenParameter cp = op.pathParams.get(pathParamIndex);
 
                 // TODO: Handle non-primitives…
-                scalaPath = colConcat(scalaPath, cp.dataType.toLowerCase());
+                scalaPath = colConcat(scalaPath, cp.dataType.toLowerCase(Locale.ROOT));
 
                 pathParamIndex++;
             } else {
@@ -425,7 +425,7 @@ public class FinchServerCodegen extends DefaultCodegen implements CodegenConfig
                     p.vendorExtensions.put("x-codegen-normalized-path-type", toPathParameter(p, "param", true));
                 } else {
                     // If parameter is primitive and required, we can rely on data types like "string" or "long"
-                    p.vendorExtensions.put("x-codegen-normalized-path-type", p.dataType.toLowerCase());
+                    p.vendorExtensions.put("x-codegen-normalized-path-type", p.dataType.toLowerCase(Locale.ROOT));
                 }
                 p.vendorExtensions.put("x-codegen-normalized-input-type", toInputParameter(p));
             } else {

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/FlashClientCodegen.java

@@ -17,25 +17,17 @@
 
 package org.openapitools.codegen.languages;
 
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.*;
-import org.openapitools.codegen.utils.*;
 import org.openapitools.codegen.utils.ModelUtils;
-import org.openapitools.codegen.mustache.*;
-
-import io.swagger.v3.oas.models.security.SecurityScheme;
-import io.swagger.v3.oas.models.*;
-import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.oas.models.responses.ApiResponse;
-import io.swagger.v3.oas.models.parameters.*;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.File;
 import java.util.Arrays;
 import java.util.HashMap;
-import java.util.HashSet;
+import java.util.Locale;
-
-import org.apache.commons.lang3.StringUtils;
 
 public class FlashClientCodegen extends DefaultCodegen implements CodegenConfig {
     private static final Logger LOGGER = LoggerFactory.getLogger(FlashClientCodegen.class);
@@ -267,7 +259,7 @@ public class FlashClientCodegen extends DefaultCodegen implements CodegenConfig
 
         // if it's all uppper case, convert to lower case
         if (name.matches("^[A-Z_]*$")) {
-            name = name.toLowerCase();
+            name = name.toLowerCase(Locale.ROOT);
         }
 
         // underscore the variable name

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/HaskellHttpClientCodegen.java

@@ -465,7 +465,7 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
         } else {
             baseTitle = baseTitle.trim();
             // Drop any API suffix
-            if (baseTitle.toUpperCase().endsWith("API")) {
+            if (baseTitle.toUpperCase(Locale.ROOT).endsWith("API")) {
                 baseTitle = baseTitle.substring(0, baseTitle.length() - 3);
             }
         }
@@ -473,7 +473,7 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
         if (!additionalProperties.containsKey(PROP_CABAL_PACKAGE)) {
             List<String> words = new ArrayList<>();
             for (String word : baseTitle.split(" ")) {
-                words.add(word.toLowerCase());
+                words.add(word.toLowerCase(Locale.ROOT));
             }
             setCabalPackage(StringUtils.join(words, "-"));
         }
@@ -548,7 +548,7 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
             Schema inner = ap.getItems();
             return "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return "(Map.Map String " + getTypeDeclaration(inner) + ")";
         }
         return super.getTypeDeclaration(p);
@@ -570,7 +570,7 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
     @Override
     public String toInstantiationType(Schema p) {
         if (ModelUtils.isMapSchema(p)) {
-            Schema additionalProperties2 = (Schema) p.getAdditionalProperties();
+            Schema additionalProperties2 = ModelUtils.getAdditionalProperties(p);
             String type = additionalProperties2.getType();
             if (null == type) {
                 LOGGER.error("No Type defined for Additional Schema " + additionalProperties2 + "\n" //
@@ -615,7 +615,7 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
             LOGGER.warn("generated unique operationId `" + uniqueName + "`");
         }
         op.operationId = uniqueName;
-        op.operationIdLowerCase = uniqueName.toLowerCase();
+        op.operationIdLowerCase = uniqueName.toLowerCase(Locale.ROOT);
         op.operationIdCamelCase = DefaultCodegen.camelize(uniqueName);
         op.operationIdSnakeCase = DefaultCodegen.underscore(uniqueName);
         opList.add(op);
@@ -628,7 +628,7 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
         op.vendorExtensions.put(X_OPERATION_TYPE, operationType);
         typeNames.add(operationType);
 
-        op.vendorExtensions.put(X_HADDOCK_PATH, String.format("%s %s", op.httpMethod, op.path.replace("/", "\\/")));
+        op.vendorExtensions.put(X_HADDOCK_PATH, String.format(Locale.ROOT, "%s %s", op.httpMethod, op.path.replace("/", "\\/")));
         op.vendorExtensions.put(X_HAS_BODY_OR_FORM_PARAM, op.getHasBodyParam() || op.getHasFormParams());
 
         for (CodegenParameter param : op.allParams) {
@@ -1003,9 +1003,9 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
         if (word.length() == 0) {
             return word;
         } else if (word.length() == 1) {
-            return word.substring(0, 1).toUpperCase();
+            return word.substring(0, 1).toUpperCase(Locale.ROOT);
         } else {
-            return word.substring(0, 1).toUpperCase() + word.substring(1);
+            return word.substring(0, 1).toUpperCase(Locale.ROOT) + word.substring(1);
         }
     }
 
@@ -1013,9 +1013,9 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
         if (word.length() == 0) {
             return word;
         } else if (word.length() == 1) {
-            return word.substring(0, 1).toLowerCase();
+            return word.substring(0, 1).toLowerCase(Locale.ROOT);
         } else {
-            return word.substring(0, 1).toLowerCase() + word.substring(1);
+            return word.substring(0, 1).toLowerCase(Locale.ROOT) + word.substring(1);
         }
     }
 
@@ -1303,7 +1303,7 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
         }
 
         // number
-        if (num.contains(datatype.toLowerCase())) {
+        if (num.contains(datatype.toLowerCase(Locale.ROOT))) {
             String varName = "Num" + value;
             varName = varName.replaceAll("-", "Minus_");
             varName = varName.replaceAll("\\+", "Plus_");
@@ -1317,7 +1317,7 @@ public class HaskellHttpClientCodegen extends DefaultCodegen implements CodegenC
     @Override
     public String toEnumValue(String value, String datatype) {
         List<String> num = new ArrayList<>(Arrays.asList("integer", "int", "double", "long", "float"));
-        if (num.contains(datatype.toLowerCase())) {
+        if (num.contains(datatype.toLowerCase(Locale.ROOT))) {
             return value;
         } else {
             return "\"" + escapeText(value) + "\"";

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/HaskellServantCodegen.java

@@ -17,6 +17,10 @@
 
 package org.openapitools.codegen.languages;
 
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.Operation;
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
 import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConfig;
@@ -29,15 +33,16 @@ import org.openapitools.codegen.CodegenType;
 import org.openapitools.codegen.DefaultCodegen;
 import org.openapitools.codegen.SupportingFile;
 import org.openapitools.codegen.utils.ModelUtils;
-
-import io.swagger.v3.oas.models.OpenAPI;
-import io.swagger.v3.oas.models.Operation;
-import io.swagger.v3.oas.models.parameters.Parameter;
-import io.swagger.v3.oas.models.media.*;
-
-import java.util.*;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
 import java.util.regex.Pattern;
 
 public class HaskellServantCodegen extends DefaultCodegen implements CodegenConfig {
@@ -204,9 +209,9 @@ public class HaskellServantCodegen extends DefaultCodegen implements CodegenConf
         if (word.length() == 0) {
             return word;
         } else if (word.length() == 1) {
-            return word.substring(0, 1).toUpperCase();
+            return word.substring(0, 1).toUpperCase(Locale.ROOT);
         } else {
-            return word.substring(0, 1).toUpperCase() + word.substring(1);
+            return word.substring(0, 1).toUpperCase(Locale.ROOT) + word.substring(1);
         }
     }
 
@@ -214,9 +219,9 @@ public class HaskellServantCodegen extends DefaultCodegen implements CodegenConf
         if (word.length() == 0) {
             return word;
         } else if (word.length() == 1) {
-            return word.substring(0, 1).toLowerCase();
+            return word.substring(0, 1).toLowerCase(Locale.ROOT);
         } else {
-            return word.substring(0, 1).toLowerCase() + word.substring(1);
+            return word.substring(0, 1).toLowerCase(Locale.ROOT) + word.substring(1);
         }
     }
 
@@ -230,7 +235,7 @@ public class HaskellServantCodegen extends DefaultCodegen implements CodegenConf
             title = "OpenAPI";
         } else {
             title = title.trim();
-            if (title.toUpperCase().endsWith("API")) {
+            if (title.toUpperCase(Locale.ROOT).endsWith("API")) {
                 title = title.substring(0, title.length() - 3);
             }
         }
@@ -240,7 +245,7 @@ public class HaskellServantCodegen extends DefaultCodegen implements CodegenConf
         // The package name is made by appending the lowercased words of the title interspersed with dashes
         List<String> wordsLower = new ArrayList<String>();
         for (String word : words) {
-            wordsLower.add(word.toLowerCase());
+            wordsLower.add(word.toLowerCase(Locale.ROOT));
         }
         String cabalName = joinStrings("-", wordsLower);
 
@@ -293,7 +298,7 @@ public class HaskellServantCodegen extends DefaultCodegen implements CodegenConf
             Schema inner = ap.getItems();
             return "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return "Map.Map String " + getTypeDeclaration(inner);
         }
         return fixModelChars(super.getTypeDeclaration(p));
@@ -328,7 +333,7 @@ public class HaskellServantCodegen extends DefaultCodegen implements CodegenConf
     @Override
     public String toInstantiationType(Schema p) {
         if (ModelUtils.isMapSchema(p)) {
-            Schema additionalProperties2 = (Schema) p.getAdditionalProperties();
+            Schema additionalProperties2 = ModelUtils.getAdditionalProperties(p);
             String type = additionalProperties2.getType();
             if (null == type) {
                 LOGGER.error("No Type defined for Additional Property " + additionalProperties2 + "\n" //
@@ -484,7 +489,7 @@ public class HaskellServantCodegen extends DefaultCodegen implements CodegenConf
         if (returnType.indexOf(" ") >= 0) {
             returnType = "(" + returnType + ")";
         }
-        path.add("Verb '" + op.httpMethod.toUpperCase() + " 200 '[JSON] " + returnType);
+        path.add("Verb '" + op.httpMethod.toUpperCase(Locale.ROOT) + " 200 '[JSON] " + returnType);
         type.add("m " + returnType);
 
         op.vendorExtensions.put("x-routeType", joinStrings(" :> ", path));

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JMeterClientCodegen.java

@@ -174,7 +174,7 @@ public class JMeterClientCodegen extends DefaultCodegen implements CodegenConfig
             Schema inner = ap.getItems();
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "[String, " + getTypeDeclaration(inner) + "]";
         }
         return super.getTypeDeclaration(p);

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaInflectorServerCodegen.java

@@ -18,7 +18,6 @@
 package org.openapitools.codegen.languages;
 
 import io.swagger.v3.oas.models.Operation;
-
 import org.apache.commons.lang3.BooleanUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CodegenModel;
@@ -32,6 +31,7 @@ import org.slf4j.LoggerFactory;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 public class JavaInflectorServerCodegen extends AbstractJavaCodegen {
@@ -198,7 +198,7 @@ public class JavaInflectorServerCodegen extends AbstractJavaCodegen {
 
     @Override
     protected String getOrGenerateOperationId(Operation operation, String path, String httpMethod) {
-        return super.getOrGenerateOperationId(operation, path, httpMethod.toUpperCase());
+        return super.getOrGenerateOperationId(operation, path, httpMethod.toUpperCase(Locale.ROOT));
     }
 
     public String apiFilename(String templateName, String tag) {

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaJerseyServerCodegen.java

@@ -17,13 +17,12 @@
 
 package org.openapitools.codegen.languages;
 
-import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.Operation;
-import io.swagger.v3.oas.models.*;
-
-import java.util.*;
-
 import org.apache.commons.lang3.BooleanUtils;
 import org.apache.commons.lang3.StringUtils;
+import org.openapitools.codegen.*;
+
+import java.util.*;
 
 public class JavaJerseyServerCodegen extends AbstractJavaJAXRSServerCodegen {
 
@@ -159,7 +158,7 @@ public class JavaJerseyServerCodegen extends AbstractJavaJAXRSServerCodegen {
     @Override
     public void addOperationToGroup(String tag, String resourcePath, Operation operation, CodegenOperation co, Map<String, List<CodegenOperation>> operations) {
         if (useTags) {
-            String basePath = tag.toLowerCase();
+            String basePath = tag.toLowerCase(Locale.ROOT);
             if (basePath.startsWith("/")) {
                 basePath = basePath.substring(1);
             }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaPKMSTServerCodegen.java

@@ -21,7 +21,6 @@ import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.PathItem;
 import io.swagger.v3.oas.models.tags.Tag;
-
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConstants;
 import org.openapitools.codegen.CodegenModel;
@@ -39,6 +38,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 /**
@@ -541,7 +541,7 @@ public class JavaPKMSTServerCodegen extends AbstractJavaCodegen {
             // Drop any API suffix
             if (title != null) {
                 title = title.trim().replace(" ", "-");
-                if (title.toUpperCase().endsWith("API")) {
+                if (title.toUpperCase(Locale.ROOT).endsWith("API")) {
                     title = title.substring(0, title.length() - 3);
                 }
 

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaPlayFrameworkCodegen.java

@@ -30,6 +30,7 @@ import org.openapitools.codegen.languages.features.BeanValidationFeatures;
 
 import java.io.File;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -191,7 +192,7 @@ public class JavaPlayFrameworkCodegen extends AbstractJavaCodegen implements Bea
         if (this.useSwaggerUI) {
             //App/Controllers
             supportingFiles.add(new SupportingFile("openapi.mustache", "public", "openapi.json"));
-            supportingFiles.add(new SupportingFile("apiDocController.mustache", String.format("app/%s", apiPackage.replace(".", File.separator)), "ApiDocController.java"));
+            supportingFiles.add(new SupportingFile("apiDocController.mustache", String.format(Locale.ROOT, "app/%s", apiPackage.replace(".", File.separator)), "ApiDocController.java"));
         }
 
         //We remove the default api.mustache that is used

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaVertXServerCodegen.java

@@ -22,7 +22,6 @@ import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.PathItem;
 import io.swagger.v3.oas.models.PathItem.HttpMethod;
 import io.swagger.v3.oas.models.media.Schema;
-
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenModel;
 import org.openapitools.codegen.CodegenOperation;
@@ -34,6 +33,7 @@ import org.openapitools.codegen.utils.URLPathUtils;
 import java.io.File;
 import java.net.URL;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.regex.Matcher;
@@ -175,7 +175,7 @@ public class JavaVertXServerCodegen extends AbstractJavaCodegen {
         if (operations != null) {
             List<CodegenOperation> ops = (List<CodegenOperation>) operations.get("operation");
             for (CodegenOperation operation : ops) {
-                operation.httpMethod = operation.httpMethod.toLowerCase();
+                operation.httpMethod = operation.httpMethod.toLowerCase(Locale.ROOT);
 
                 if ("Void".equalsIgnoreCase(operation.returnType)) {
                     operation.returnType = null;
@@ -251,7 +251,7 @@ public class JavaVertXServerCodegen extends AbstractJavaCodegen {
                 serviceIdTemp = computeServiceId(pathname, entry);
                 entry.getValue().addExtension("x-serviceid", serviceIdTemp);
                 entry.getValue().addExtension("x-serviceid-varname",
-                        serviceIdTemp.toUpperCase() + "_SERVICE_ID");
+                        serviceIdTemp.toUpperCase(Locale.ROOT) + "_SERVICE_ID");
             }
         }
     }
@@ -284,7 +284,7 @@ public class JavaVertXServerCodegen extends AbstractJavaCodegen {
         pattern = Pattern.compile("(_)(.)");
         matcher = pattern.matcher(word);
         while (matcher.find()) {
-            word = matcher.replaceFirst(matcher.group(2).toUpperCase());
+            word = matcher.replaceFirst(matcher.group(2).toUpperCase(Locale.ROOT));
             matcher = pattern.matcher(word);
         }
         return word;

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavascriptClientCodegen.java

@@ -18,7 +18,12 @@
 package org.openapitools.codegen.languages;
 
 import com.google.common.base.Strings;
-
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.info.Info;
+import io.swagger.v3.oas.models.info.License;
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenConstants;
@@ -27,18 +32,9 @@ import org.openapitools.codegen.CodegenOperation;
 import org.openapitools.codegen.CodegenParameter;
 import org.openapitools.codegen.CodegenProperty;
 import org.openapitools.codegen.CodegenType;
-import org.openapitools.codegen.SupportingFile;
 import org.openapitools.codegen.DefaultCodegen;
+import org.openapitools.codegen.SupportingFile;
 import org.openapitools.codegen.utils.ModelUtils;
-
-import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.oas.models.PathItem;
-import io.swagger.v3.oas.models.PathItem.HttpMethod;
-import io.swagger.v3.oas.models.*;
-import io.swagger.v3.oas.models.parameters.*;
-import io.swagger.v3.oas.models.info.*;
-
-import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -48,6 +44,7 @@ import java.util.Arrays;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 public class JavascriptClientCodegen extends DefaultCodegen implements CodegenConfig {
@@ -601,7 +598,7 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
             Schema inner = ap.getItems();
             return "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return "{String: " + getTypeDeclaration(inner) + "}";
         }
         return super.getTypeDeclaration(p);
@@ -863,9 +860,9 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
                 codegenModel.getVendorExtensions().put("x-itemType", getSchemaType(am.getItems()));
             }
         } else if (ModelUtils.isMapSchema(model)) {
-            if (model.getAdditionalProperties() != null) {
+            if (ModelUtils.getAdditionalProperties(model) != null) {
                 codegenModel.getVendorExtensions().put("x-isMap", true);
-                codegenModel.getVendorExtensions().put("x-itemType", getSchemaType((Schema) model.getAdditionalProperties()));
+                codegenModel.getVendorExtensions().put("x-itemType", getSchemaType(ModelUtils.getAdditionalProperties(model)));
             } else {
                 String type = model.getType();
                 if (isPrimitiveType(type)){
@@ -1132,7 +1129,7 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
 
         // for symbol, e.g. $, #
         if (getSymbolName(value) != null) {
-            return (getSymbolName(value)).toUpperCase();
+            return (getSymbolName(value)).toUpperCase(Locale.ROOT);
         }
 
         return value;

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavascriptClosureAngularClientCodegen.java

@@ -236,7 +236,7 @@ public class JavascriptClosureAngularClientCodegen extends DefaultCodegen implem
             Schema inner = ap.getItems();
             return getSchemaType(p) + "<!" + getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return "Object<!string, "+ getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isFileSchema(p)) {
             return "Object";

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavascriptFlowtypedClientCodegen.java

@@ -30,7 +30,7 @@ import java.text.SimpleDateFormat;
 import java.util.*;
 
 public class JavascriptFlowtypedClientCodegen extends AbstractTypeScriptClientCodegen {
-    private static final SimpleDateFormat SNAPSHOT_SUFFIX_FORMAT = new SimpleDateFormat("yyyyMMddHHmm");
+    private static final SimpleDateFormat SNAPSHOT_SUFFIX_FORMAT = new SimpleDateFormat("yyyyMMddHHmm", Locale.ROOT);
 
     public static final String NPM_NAME = "npmName";
     public static final String NPM_VERSION = "npmVersion";
@@ -119,7 +119,7 @@ public class JavascriptFlowtypedClientCodegen extends AbstractTypeScriptClientCo
 
     @Override
     protected void addAdditionPropertiesToCodeGenModel(CodegenModel codegenModel, Schema schema) {
-        codegenModel.additionalPropertiesType = getTypeDeclaration((Schema) schema.getAdditionalProperties());
+        codegenModel.additionalPropertiesType = getTypeDeclaration(ModelUtils.getAdditionalProperties(schema));
         addImport(codegenModel, codegenModel.additionalPropertiesType);
     }
 
@@ -141,7 +141,7 @@ public class JavascriptFlowtypedClientCodegen extends AbstractTypeScriptClientCo
             inner = ((ArraySchema) p).getItems();
             return this.getSchemaType(p) + "<" + this.getTypeDeclaration(inner) + ">";
         } else if (ModelUtils.isMapSchema(p)) {
-            inner = (Schema) p.getAdditionalProperties();
+            inner = ModelUtils.getAdditionalProperties(p);
             return "{ [key: string]: " + this.getTypeDeclaration(inner) + "; }";
         } else if (ModelUtils.isFileSchema(p)) {
             return "any";

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/LuaClientCodegen.java

@@ -17,21 +17,32 @@
 
 package org.openapitools.codegen.languages;
 
-import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.media.ArraySchema;
-import org.openapitools.codegen.utils.ModelUtils;
+import io.swagger.v3.oas.models.media.Schema;
-import io.swagger.v3.oas.models.OpenAPI;
-import io.swagger.v3.oas.models.Operation;
-import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.oas.models.responses.ApiResponse;
-
-import java.io.File;
-import java.util.*;
-
 import org.apache.commons.lang3.StringUtils;
-
+import org.openapitools.codegen.CliOption;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenConstants;
+import org.openapitools.codegen.CodegenOperation;
+import org.openapitools.codegen.CodegenParameter;
+import org.openapitools.codegen.CodegenProperty;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.DefaultCodegen;
+import org.openapitools.codegen.SupportingFile;
+import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.io.File;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.Locale;
+import java.util.Map;
+
 public class LuaClientCodegen extends DefaultCodegen implements CodegenConfig {
     private static final Logger LOGGER = LoggerFactory.getLogger(LuaClientCodegen.class);
 
@@ -337,7 +348,7 @@ public class LuaClientCodegen extends DefaultCodegen implements CodegenConfig {
             Schema inner = ap.getItems();
             return getTypeDeclaration(inner);
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getTypeDeclaration(inner);
         }
 
@@ -403,7 +414,7 @@ public class LuaClientCodegen extends DefaultCodegen implements CodegenConfig {
                     // find the datatype of the parameter
                     //final CodegenParameter cp = op.pathParams.get(pathParamIndex);
                     // TODO: Handle non-primitives…
-                    //luaPath = luaPath + cp.dataType.toLowerCase();
+                    //luaPath = luaPath + cp.dataType.toLowerCase(Locale.ROOT);
                     luaPath = luaPath + "/%s";
                     pathParamIndex++;
                 } else if (items[i].length() != 0) {
@@ -514,11 +525,11 @@ public class LuaClientCodegen extends DefaultCodegen implements CodegenConfig {
 
         // for symbol, e.g. $, #
         if (getSymbolName(name) != null) {
-            return getSymbolName(name).toUpperCase();
+            return getSymbolName(name).toUpperCase(Locale.ROOT);
         }
 
         // string
-        String enumName = sanitizeName(underscore(name).toUpperCase());
+        String enumName = sanitizeName(underscore(name).toUpperCase(Locale.ROOT));
         enumName = enumName.replaceFirst("^_", "");
         enumName = enumName.replaceFirst("_$", "");
 
@@ -531,7 +542,7 @@ public class LuaClientCodegen extends DefaultCodegen implements CodegenConfig {
 
     @Override
     public String toEnumName(CodegenProperty property) {
-        String enumName = underscore(toModelName(property.name)).toUpperCase();
+        String enumName = underscore(toModelName(property.name)).toUpperCase(Locale.ROOT);
 
         // remove [] for array or map of enum
         enumName = enumName.replace("[]", "");

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/NodeJSServerCodegen.java

@@ -20,25 +20,37 @@ package org.openapitools.codegen.languages;
 import com.google.common.collect.ArrayListMultimap;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Multimap;
-
+import io.swagger.v3.oas.models.OpenAPI;
-import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.Operation;
-import org.openapitools.codegen.utils.*;
+import io.swagger.v3.oas.models.PathItem;
-import io.swagger.v3.oas.models.*;
+import io.swagger.v3.oas.models.PathItem.HttpMethod;
-import io.swagger.v3.oas.models.info.*;
-import io.swagger.v3.oas.models.PathItem.*;
 import io.swagger.v3.oas.models.Paths;
-
+import io.swagger.v3.oas.models.info.Info;
+import org.openapitools.codegen.CliOption;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenOperation;
+import org.openapitools.codegen.CodegenParameter;
+import org.openapitools.codegen.CodegenResponse;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.DefaultCodegen;
+import org.openapitools.codegen.SupportingFile;
+import org.openapitools.codegen.utils.URLPathUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.io.File;
 import java.net.URL;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
 import java.util.Map.Entry;
 import java.util.regex.Pattern;
 
-import org.apache.commons.lang3.StringUtils;
-
 public class NodeJSServerCodegen extends DefaultCodegen implements CodegenConfig {
 
     private static final Logger LOGGER = LoggerFactory.getLogger(NodeJSServerCodegen.class);
@@ -232,7 +244,7 @@ public class NodeJSServerCodegen extends DefaultCodegen implements CodegenConfig
         @SuppressWarnings("unchecked")
         List<CodegenOperation> operations = (List<CodegenOperation>) objectMap.get("operation");
         for (CodegenOperation operation : operations) {
-            operation.httpMethod = operation.httpMethod.toLowerCase();
+            operation.httpMethod = operation.httpMethod.toLowerCase(Locale.ROOT);
 
             List<CodegenParameter> params = operation.allParams;
             if (params != null && params.size() == 0) {
@@ -368,7 +380,7 @@ public class NodeJSServerCodegen extends DefaultCodegen implements CodegenConfig
                         .replaceAll("^[-]*", "")
                         .replaceAll("[-]*$", "")
                         .replaceAll("[-]{2,}", "-")
-                        .toLowerCase();
+                        .toLowerCase(Locale.ROOT);
                 this.additionalProperties.put("projectName", projectName);
             }
         }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ObjcClientCodegen.java

@@ -17,6 +17,9 @@
 
 package org.openapitools.codegen.languages;
 
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenConstants;
@@ -28,10 +31,6 @@ import org.openapitools.codegen.CodegenType;
 import org.openapitools.codegen.DefaultCodegen;
 import org.openapitools.codegen.SupportingFile;
 import org.openapitools.codegen.utils.ModelUtils;
-
-import io.swagger.v3.oas.models.OpenAPI;
-import io.swagger.v3.oas.models.Operation;
-import io.swagger.v3.oas.models.media.*;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -40,11 +39,10 @@ import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
 
-import org.apache.commons.lang3.StringUtils;
-
 public class ObjcClientCodegen extends DefaultCodegen implements CodegenConfig {
     private static final Logger LOGGER = LoggerFactory.getLogger(ObjcClientCodegen.class);
 
@@ -341,8 +339,8 @@ public class ObjcClientCodegen extends DefaultCodegen implements CodegenConfig {
         }
 
         // TODO avoid using toLowerCase as typeMapping should be case-sensitive
-        if (typeMapping.containsKey(openAPIType.toLowerCase())) {
+        if (typeMapping.containsKey(openAPIType.toLowerCase(Locale.ROOT))) {
-            type = typeMapping.get(openAPIType.toLowerCase());
+            type = typeMapping.get(openAPIType.toLowerCase(Locale.ROOT));
             if (languageSpecificPrimitives.contains(type) && !foundationClasses.contains(type)) {
                 return toModelNameWithoutReservedWordCheck(type);
             }
@@ -377,7 +375,7 @@ public class ObjcClientCodegen extends DefaultCodegen implements CodegenConfig {
                 return getSchemaType(p) + "<" + innerTypeDeclaration + ">*";
             }
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
 
             String innerTypeDeclaration = getTypeDeclaration(inner);
 
@@ -417,7 +415,7 @@ public class ObjcClientCodegen extends DefaultCodegen implements CodegenConfig {
 
     @Override
     public boolean isDataTypeBinary(String dataType) {
-        return dataType.toLowerCase().startsWith("nsdata");
+        return dataType.toLowerCase(Locale.ROOT).startsWith("nsdata");
     }
 
     @Override

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PerlClientCodegen.java

@@ -220,7 +220,7 @@ public class PerlClientCodegen extends DefaultCodegen implements CodegenConfig {
             Schema inner = ap.getItems();
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "[string," + getTypeDeclaration(inner) + "]";
         }
         return super.getTypeDeclaration(p);

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PhpLaravelServerCodegen.java

@@ -204,7 +204,7 @@ public class PhpLaravelServerCodegen extends AbstractPhpCodegen {
         List<CodegenOperation> operations = (List<CodegenOperation>) objectMap.get("operation");
 
         for (CodegenOperation op : operations) {
-            op.httpMethod = op.httpMethod.toLowerCase();
+            op.httpMethod = op.httpMethod.toLowerCase(Locale.ROOT);
             // check to see if the path contains ".", which is not supported by PHP laravel
             // ref: https://github.com/swagger-api/swagger-codegen/issues/6897
             if (op.path != null && op.path.contains(".")) {

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PhpLumenServerCodegen.java

@@ -17,10 +17,12 @@
 
 package org.openapitools.codegen.languages;
 
-import org.openapitools.codegen.*;
+import org.openapitools.codegen.CodegenOperation;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.SupportingFile;
 
-import java.util.*;
 import java.io.File;
+import java.util.*;
 
 public class PhpLumenServerCodegen extends AbstractPhpCodegen {
     @SuppressWarnings("hiding")
@@ -115,7 +117,7 @@ public class PhpLumenServerCodegen extends AbstractPhpCodegen {
         List<CodegenOperation> operations = (List<CodegenOperation>) objectMap.get("operation");
 
         for (CodegenOperation op : operations) {
-            op.httpMethod = op.httpMethod.toLowerCase();
+            op.httpMethod = op.httpMethod.toLowerCase(Locale.ROOT);
             // check to see if the path contains ".", which is not supported by Lumen
             if (op.path != null && op.path.contains(".")) {
                 throw new IllegalArgumentException("'.' (dot) is not supported by PHP Lumen.");

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PhpSilexServerCodegen.java

@@ -116,6 +116,9 @@ public class PhpSilexServerCodegen extends DefaultCodegen implements CodegenConf
         supportingFiles.add(new SupportingFile("composer.json", "", "composer.json"));
         supportingFiles.add(new SupportingFile("index.mustache", "", "index.php"));
         supportingFiles.add(new SupportingFile(".htaccess", "", ".htaccess"));
+
+        // remove this line when this class extends AbstractPhpCodegen
+        supportingFiles.add(new SupportingFile(".gitignore", "", ".gitignore"));
     }
 
     @Override
@@ -160,7 +163,7 @@ public class PhpSilexServerCodegen extends DefaultCodegen implements CodegenConf
             Schema inner = ap.getItems();
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "[string," + getTypeDeclaration(inner) + "]";
         }
         return super.getTypeDeclaration(p);

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PhpSlimServerCodegen.java

@@ -113,7 +113,6 @@ public class PhpSlimServerCodegen extends AbstractPhpCodegen {
         supportingFiles.add(new SupportingFile("composer.mustache", "", "composer.json"));
         supportingFiles.add(new SupportingFile("index.mustache", "", "index.php"));
         supportingFiles.add(new SupportingFile(".htaccess", "", ".htaccess"));
-        supportingFiles.add(new SupportingFile(".gitignore", "", ".gitignore"));
         supportingFiles.add(new SupportingFile("AbstractApiController.mustache", toSrcPath(invokerPackage, srcBasePath), "AbstractApiController.php"));
         supportingFiles.add(new SupportingFile("SlimRouter.mustache", toSrcPath(invokerPackage, srcBasePath), "SlimRouter.php"));
         supportingFiles.add(new SupportingFile("phpunit.xml.mustache", "", "phpunit.xml.dist"));

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PhpSymfonyServerCodegen.java

@@ -17,17 +17,11 @@
 
 package org.openapitools.codegen.languages;
 
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.*;
 import org.openapitools.codegen.utils.ModelUtils;
-
-import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.oas.models.PathItem;
-import io.swagger.v3.oas.models.PathItem.HttpMethod;
-import io.swagger.v3.oas.models.*;
-import io.swagger.v3.oas.models.parameters.*;
-import io.swagger.v3.core.util.Yaml;
-
-import org.apache.commons.lang3.StringUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -194,7 +188,7 @@ public class PhpSymfonyServerCodegen extends AbstractPhpCodegen implements Codeg
         this.bundleName = bundleName;
         this.bundleClassName = bundleName + "Bundle";
         this.bundleExtensionName = bundleName + "Extension";
-        this.bundleAlias = snakeCase(bundleName).replaceAll("([A-Z]+)", "\\_$1").toLowerCase();
+        this.bundleAlias = snakeCase(bundleName).replaceAll("([A-Z]+)", "\\_$1").toLowerCase(Locale.ROOT);
     }
 
     public void setPhpLegacySupport(Boolean support) {
@@ -497,7 +491,7 @@ public class PhpSymfonyServerCodegen extends AbstractPhpCodegen implements Codeg
         }
 
         if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getTypeDeclaration(inner);
         }
 

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PhpZendExpressivePathHandlerServerCodegen.java

@@ -17,23 +17,18 @@
 
 package org.openapitools.codegen.languages;
 
-import io.swagger.v3.oas.models.PathItem;
-import org.openapitools.codegen.*;
-
-import io.swagger.v3.oas.models.PathItem.HttpMethod;
 import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.Operation;
+import io.swagger.v3.oas.models.PathItem;
+import io.swagger.v3.oas.models.PathItem.HttpMethod;
 import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.core.util.Yaml;
+import io.swagger.v3.oas.models.parameters.Parameter;
-import io.swagger.v3.oas.models.parameters.*;
+import io.swagger.v3.oas.models.parameters.QueryParameter;
+import org.openapitools.codegen.*;
 import org.openapitools.codegen.utils.ModelUtils;
 
-
 import java.io.File;
-import java.util.ArrayList;
+import java.util.*;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 
 public class PhpZendExpressivePathHandlerServerCodegen extends AbstractPhpCodegen {
 
@@ -120,7 +115,7 @@ public class PhpZendExpressivePathHandlerServerCodegen extends AbstractPhpCodege
             }
         }
         if (counter == 0) {
-            co.operationIdLowerCase = co.operationId.toLowerCase();
+            co.operationIdLowerCase = co.operationId.toLowerCase(Locale.ROOT);
             opList.add(co);
             co.baseName = tag;
         }

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java

@@ -17,14 +17,18 @@
 
 package org.openapitools.codegen.languages;
 
-import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.media.ArraySchema;
-
+import io.swagger.v3.oas.models.media.Schema;
-import io.swagger.v3.oas.models.OpenAPI;
-import io.swagger.v3.oas.models.Operation;
-import io.swagger.v3.oas.models.media.*;
-import org.openapitools.codegen.utils.ModelUtils;
-
 import org.apache.commons.lang3.StringUtils;
+import org.openapitools.codegen.CliOption;
+import org.openapitools.codegen.CodegenConfig;
+import org.openapitools.codegen.CodegenConstants;
+import org.openapitools.codegen.CodegenOperation;
+import org.openapitools.codegen.CodegenParameter;
+import org.openapitools.codegen.CodegenType;
+import org.openapitools.codegen.DefaultCodegen;
+import org.openapitools.codegen.SupportingFile;
+import org.openapitools.codegen.utils.ModelUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -33,6 +37,7 @@ import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 
 import static java.util.UUID.randomUUID;
@@ -40,7 +45,7 @@ import static java.util.UUID.randomUUID;
 public class PowerShellClientCodegen extends DefaultCodegen implements CodegenConfig {
     private static final Logger LOGGER = LoggerFactory.getLogger(PowerShellClientCodegen.class);
 
-    private String packageGuid = "{" + randomUUID().toString().toUpperCase() + "}";
+    private String packageGuid = "{" + randomUUID().toString().toUpperCase(Locale.ROOT) + "}";
 
     protected String sourceFolder = "src";
     protected String packageName = "Org.OpenAPITools";
@@ -383,7 +388,7 @@ public class PowerShellClientCodegen extends DefaultCodegen implements CodegenCo
             Schema inner = ap.getItems();
             return getTypeDeclaration(inner) + "[]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             // TODO not sure if the following map/hash declaration is correct
             return "{String, " + getTypeDeclaration(inner) + "}";
         } else if (!languageSpecificPrimitives.contains(getSchemaType(p))) {

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PythonClientCodegen.java

@@ -17,6 +17,9 @@
 
 package org.openapitools.codegen.languages;
 
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.StringUtils;
 import org.openapitools.codegen.CliOption;
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenConstants;
@@ -27,11 +30,6 @@ import org.openapitools.codegen.CodegenType;
 import org.openapitools.codegen.DefaultCodegen;
 import org.openapitools.codegen.SupportingFile;
 import org.openapitools.codegen.utils.ModelUtils;
-import io.swagger.v3.oas.models.OpenAPI;
-import io.swagger.v3.oas.models.Operation;
-import io.swagger.v3.oas.models.media.*;
-import io.swagger.v3.oas.models.responses.ApiResponse;
-import io.swagger.v3.parser.util.SchemaTypeUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -40,13 +38,10 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.regex.Pattern;
 
-import org.apache.commons.lang3.StringUtils;
-
-import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
-
 public class PythonClientCodegen extends DefaultCodegen implements CodegenConfig {
     private static final Logger LOGGER = LoggerFactory.getLogger(PythonClientCodegen.class);
 
@@ -404,7 +399,7 @@ public class PythonClientCodegen extends DefaultCodegen implements CodegenConfig
             Schema inner = ap.getItems();
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
 
             return getSchemaType(p) + "(str, " + getTypeDeclaration(inner) + ")";
         }
@@ -436,7 +431,7 @@ public class PythonClientCodegen extends DefaultCodegen implements CodegenConfig
 
         // if it's all uppper case, convert to lower case
         if (name.matches("^[A-Z_]*$")) {
-            name = name.toLowerCase();
+            name = name.toLowerCase(Locale.ROOT);
         }
 
         // underscore the variable name

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PythonFlaskConnexionServerCodegen.java

@@ -20,21 +20,21 @@ package org.openapitools.codegen.languages;
 import com.google.common.collect.ArrayListMultimap;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Multimap;
-
+import io.swagger.v3.oas.models.OpenAPI;
-import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.Operation;
-import org.openapitools.codegen.utils.ModelUtils;
-import io.swagger.v3.oas.models.media.*;
 import io.swagger.v3.oas.models.PathItem;
 import io.swagger.v3.oas.models.PathItem.HttpMethod;
-import io.swagger.v3.oas.models.*;
+import io.swagger.v3.oas.models.media.ArraySchema;
+import io.swagger.v3.oas.models.media.Schema;
+import org.apache.commons.lang3.StringUtils;
+import org.openapitools.codegen.*;
+import org.openapitools.codegen.utils.ModelUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.File;
 import java.util.*;
 
-import org.apache.commons.lang3.StringUtils;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 public class PythonFlaskConnexionServerCodegen extends DefaultCodegen implements CodegenConfig {
     private static final Logger LOGGER = LoggerFactory.getLogger(PythonFlaskConnexionServerCodegen.class);
 
@@ -289,7 +289,7 @@ public class PythonFlaskConnexionServerCodegen extends DefaultCodegen implements
             Schema inner = ap.getItems();
             return getSchemaType(p) + "[" + getTypeDeclaration(inner) + "]";
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getSchemaType(p) + "[str, " + getTypeDeclaration(inner) + "]";
         }
         return super.getTypeDeclaration(p);
@@ -400,7 +400,7 @@ public class PythonFlaskConnexionServerCodegen extends DefaultCodegen implements
 
         // if it's all uppper case, convert to lower case
         if (name.matches("^[A-Z_]*$")) {
-            name = name.toLowerCase();
+            name = name.toLowerCase(Locale.ROOT);
         }
 
         // underscore the variable name

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RClientCodegen.java

@@ -286,7 +286,7 @@ public class RClientCodegen extends DefaultCodegen implements CodegenConfig {
             Schema inner = ap.getItems();
             return getTypeDeclaration(inner);
         } else if (ModelUtils.isMapSchema(p)) {
-            Schema inner = (Schema) p.getAdditionalProperties();
+            Schema inner = ModelUtils.getAdditionalProperties(p);
             return getTypeDeclaration(inner);
         }
 
@@ -428,11 +428,11 @@ public class RClientCodegen extends DefaultCodegen implements CodegenConfig {
 
         // for symbol, e.g. $, #
         if (getSymbolName(name) != null) {
-            return getSymbolName(name).toUpperCase();
+            return getSymbolName(name).toUpperCase(Locale.ROOT);
         }
 
         // string
-        String enumName = sanitizeName(underscore(name).toUpperCase());
+        String enumName = sanitizeName(underscore(name).toUpperCase(Locale.ROOT));
         enumName = enumName.replaceFirst("^_", "");
         enumName = enumName.replaceFirst("_$", "");
 
@@ -445,7 +445,7 @@ public class RClientCodegen extends DefaultCodegen implements CodegenConfig {
 
     @Override
     public String toEnumName(CodegenProperty property) {
-        String enumName = underscore(toModelName(property.name)).toUpperCase();
+        String enumName = underscore(toModelName(property.name)).toUpperCase(Locale.ROOT);
 
         // remove [] for array or map of enum
         enumName = enumName.replace("[]", "");