add openapi (json/yaml) generator

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

@@ -0,0 +1,64 @@
+package org.openapitools.codegen.languages;
+
+import java.io.File;
+
+import org.apache.commons.io.FileUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.openapitools.codegen.*;
+import io.swagger.v3.oas.models.*;
+import io.swagger.v3.core.util.Json;
+
+public class OpenAPIGenerator extends DefaultCodegen implements CodegenConfig {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(OpenAPIGenerator.class);
+
+    public OpenAPIGenerator() {
+        super();
+        embeddedTemplateDir = templateDir = "openapi";
+        outputFolder = "generated-code/openapi";
+
+        supportingFiles.add(new SupportingFile("README.md", "", "README.md"));
+    }
+
+    @Override
+    public CodegenType getTag() {
+        return CodegenType.DOCUMENTATION;
+    }
+
+    @Override
+    public String getName() {
+        return "openapi";
+    }
+
+    @Override
+    public String getHelp() {
+        return "Creates a static openapi.json file (OpenAPI spec v3.0).";
+    }
+
+    @Override
+    public void processOpenAPI(OpenAPI openAPI) {
+        String swaggerString = Json.pretty(openAPI);
+
+        try {
+            String outputFile = outputFolder + File.separator + "openapi.json";
+            FileUtils.writeStringToFile(new File(outputFile), swaggerString);
+            LOGGER.info("wrote file to " + outputFile);
+        } catch (Exception e) {
+            LOGGER.error(e.getMessage(), e);
+        }
+    }
+
+    @Override
+    public String escapeQuotationMark(String input) {
+        // just return the original string
+        return input;
+    }
+
+    @Override
+    public String escapeUnsafeCharacters(String input) {
+        // just return the original string
+        return input;
+    }
+}

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

@@ -0,0 +1,71 @@
+package org.openapitools.codegen.languages;
+
+import org.openapitools.codegen.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Map;
+import java.io.File;
+
+public class OpenAPIYamlGenerator extends DefaultCodegen implements CodegenConfig {
+    public static final String OUTPUT_NAME = "outputFile";
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(OpenAPIYamlGenerator.class);
+
+    protected String outputFile = "openapi.yaml";
+
+    public OpenAPIYamlGenerator() {
+        super();
+        embeddedTemplateDir = templateDir = "openapi-yaml";
+        outputFolder = "generated-code/openapi-yaml";
+        cliOptions.add(new CliOption(OUTPUT_NAME, "output filename"));
+        supportingFiles.add(new SupportingFile("README.md", "", "README.md"));
+        supportingFiles.add(new SupportingFile("openapi.mustache",
+                "openapi",
+                "openapi.yaml"));
+    }
+
+    @Override
+    public CodegenType getTag() {
+        return CodegenType.DOCUMENTATION;
+    }
+
+    @Override
+    public String getName() {
+        return "openapi-yaml";
+    }
+
+    @Override
+    public String getHelp() {
+        return "Creates a static openapi.yaml file (OpenAPI spec v3).";
+    }
+
+
+    @Override
+    public void processOpts() {
+        super.processOpts();
+        if (additionalProperties.containsKey(OUTPUT_NAME)) {
+            this.outputFile = additionalProperties.get(OUTPUT_NAME).toString();
+        }
+    }
+
+    @Override
+    public Map<String, Object> postProcessSupportingFileData(Map<String, Object> objs) {
+        generateYAMLSpecFile(objs);
+        return super.postProcessSupportingFileData(objs);
+    }
+
+
+    @Override
+    public String escapeQuotationMark(String input) {
+        // just return the original string
+        return input;
+    }
+
+    @Override
+    public String escapeUnsafeCharacters(String input) {
+        // just return the original string
+        return input;
+    }
+
+}

modules/openapi-generator/src/main/resources/META-INF/services/org.openapitools.codegen.CodegenConfig

@@ -51,6 +51,8 @@ org.openapitools.codegen.languages.JMeterCodegen
 org.openapitools.codegen.languages.LuaClientCodegen
 org.openapitools.codegen.languages.NodeJSServerCodegen
 org.openapitools.codegen.languages.ObjcClientCodegen
+org.openapitools.codegen.languages.OpenAPIGenerator
+org.openapitools.codegen.languages.OpenAPIYamlGenerator
 org.openapitools.codegen.languages.PerlClientCodegen
 org.openapitools.codegen.languages.PhpClientCodegen
 org.openapitools.codegen.languages.PhpLumenServerCodegen

modules/openapi-generator/src/main/resources/openapi-yaml/README.md

@@ -0,0 +1,2 @@
+# OpenAPI YAML
+This is a OpenAPI YAML built by the [openapi-generator](https://github.com/openapitools/openapi-genreator) project.

modules/openapi-generator/src/main/resources/openapi-yaml/openapi.mustache

@@ -0,0 +1 @@
+{{{openapi-yaml}}}

modules/openapi-generator/src/main/resources/openapi/README.md

@@ -0,0 +1,2 @@
+# OpenAPI JSON
+This is a OpenAPI JSON built by the [openapi-generator](https://github.com/openapitools/openapi-genreator) project.

modules/openapi-generator/src/main/resources/swagger/README.md

@@ -1,2 +0,0 @@
-# Swagger JSON
-This is a swagger JSON built by the [swagger-codegen](https://github.com/swagger-api/swagger-codegen) project.