Add samples for when using the useSealed setting for Spring (#21515)

* Add samples for when using the useSealed setting for Spring

* Add the new sample generation to the workflow

.github/workflows/samples-spring-jdk17.yaml

@@ -10,6 +10,7 @@ on:
       - samples/server/petstore/springboot-lombok-tostring
       - samples/server/petstore/springboot-file-delegate-optional
       - samples/server/petstore/springboot-petstore-with-api-response-examples
+      - samples/server/petstore/spring-boot-oneof-sealed
   pull_request:
     paths:
       - samples/openapi3/client/petstore/spring-cloud-3-with-optional
@@ -19,6 +20,7 @@ on:
       - samples/server/petstore/springboot-lombok-tostring
       - samples/server/petstore/springboot-file-delegate-optional
       - samples/server/petstore/springboot-petstore-with-api-response-examples
+      - samples/server/petstore/spring-boot-oneof-sealed
 jobs:
   build:
     name: Build Java Spring (JDK17)
@@ -36,6 +38,7 @@ jobs:
           - samples/server/petstore/springboot-lombok-tostring
           - samples/server/petstore/springboot-file-delegate-optional
           - samples/server/petstore/springboot-petstore-with-api-response-examples
+          - samples/server/petstore/spring-boot-oneof-sealed
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-java@v4

bin/configs/spring-boot-oneof-sealed.yaml

@@ -0,0 +1,13 @@
+generatorName: spring
+outputDir: samples/openapi3/server/petstore/spring-boot-oneof-sealed
+inputSpec: modules/openapi-generator/src/test/resources/3_0/oneof_polymorphism_and_inheritance.yaml
+templateDir: modules/openapi-generator/src/main/resources/JavaSpring
+additionalProperties:
+  groupId: org.openapitools.openapi3
+  documentationProvider: springdoc
+  artifactId: springboot-oneof-sealed
+  snapshotVersion: "true"
+  hideGenerationTimestamp: "true"
+  generateBuilders: true
+  useOneOfInterfaces: true
+  useSealed: true

modules/openapi-generator/src/main/resources/JavaSpring/permits.mustache

@@ -1 +1 @@
-{{#useSealed}}{{#permits}}{{#-first}}permits {{/-first}}{{{.}}}{{^-last}}, {{/-last}}{{/permits}} {{/useSealed}}
+{{#useSealed}}{{#permits}}{{#-first}}permits {{/-first}}{{{.}}}{{^-last}}, {{/-last}}{{#-last}} {{/-last}}{{/permits}}{{/useSealed}}

modules/openapi-generator/src/test/java/org/openapitools/codegen/java/spring/SpringCodegenTest.java

@@ -2294,20 +2294,23 @@ public class SpringCodegenTest {
                         "Apple.java", "public final class Apple extends RepresentationModel<Apple>  {")},
                 {"oneOfDiscriminator.yaml", Map.of(
                         "FruitAllOfDisc.java", "public sealed interface FruitAllOfDisc permits AppleAllOfDisc, BananaAllOfDisc {",
-                        "FruitReqDisc.java", "public sealed interface FruitReqDisc permits AppleReqDisc, BananaReqDisc {\n")}
+                        "AppleAllOfDisc.java", "public final class AppleAllOfDisc extends RepresentationModel<AppleAllOfDisc>  implements FruitAllOfDisc {",
+                        "BananaAllOfDisc.java", "public final class BananaAllOfDisc extends RepresentationModel<BananaAllOfDisc>  implements FruitAllOfDisc {",
+                        "FruitReqDisc.java", "public sealed interface FruitReqDisc permits AppleReqDisc, BananaReqDisc {",
+                        "AppleReqDisc.java", "public final class AppleReqDisc extends RepresentationModel<AppleReqDisc>  implements FruitReqDisc {",
+                        "BananaReqDisc.java", "public final class BananaReqDisc extends RepresentationModel<BananaReqDisc>  implements FruitReqDisc {")}
         };
     }
 
     @Test(dataProvider = "sealedScenarios", description = "sealed scenarios")
-    public void sealedScenarios(String apiFile, Map<String, String> definitions) throws IOException {
+    public void sealedScenarios(String apiFile, Map<String, String> definitions) {
-        File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
+        Path output = newTempFolder();
-        output.deleteOnExit();
+        String outputPath = output.toString().replace('\\', '/');
-        String outputPath = output.getAbsolutePath().replace('\\', '/');
         OpenAPI openAPI = new OpenAPIParser()
                 .readLocation("src/test/resources/3_0/" + apiFile, null, new ParseOptions()).getOpenAPI();
 
         SpringCodegen codegen = new SpringCodegen();
-        codegen.setOutputDir(output.getAbsolutePath());
+        codegen.setOutputDir(outputPath);
         codegen.additionalProperties().put(CXFServerFeatures.LOAD_TEST_DATA_FROM_FILE, "true");
         codegen.setUseOneOfInterfaces(true);
         codegen.setUseSealed(true);

samples/openapi3/server/petstore/spring-boot-oneof-sealed/.openapi-generator-ignore

@@ -0,0 +1,23 @@
+# OpenAPI Generator Ignore
+# Generated by openapi-generator https://github.com/openapitools/openapi-generator
+
+# Use this file to prevent files from being overwritten by the generator.
+# The patterns follow closely to .gitignore or .dockerignore.
+
+# As an example, the C# client generator defines ApiClient.cs.
+# You can make changes and tell OpenAPI Generator to ignore just this file by uncommenting the following line:
+#ApiClient.cs
+
+# You can match any string of characters against a directory, file or extension with a single asterisk (*):
+#foo/*/qux
+# The above matches foo/bar/qux and foo/baz/qux, but not foo/bar/baz/qux
+
+# You can recursively match patterns against a directory, file or extension with a double asterisk (**):
+#foo/**/qux
+# This matches foo/bar/qux, foo/baz/qux, and foo/bar/baz/qux
+
+# You can also negate patterns with an exclamation (!).
+# For example, you can ignore all files in a docs folder with the file extension .md:
+#docs/*.md
+# Then explicitly reverse the ignore rule for a single file:
+#!docs/README.md

samples/openapi3/server/petstore/spring-boot-oneof-sealed/.openapi-generator/FILES

@@ -0,0 +1,31 @@
+README.md
+pom.xml
+src/main/java/org/openapitools/OpenApiGeneratorApplication.java
+src/main/java/org/openapitools/RFC3339DateFormat.java
+src/main/java/org/openapitools/api/ApiUtil.java
+src/main/java/org/openapitools/api/BarApi.java
+src/main/java/org/openapitools/api/FooApi.java
+src/main/java/org/openapitools/configuration/EnumConverterConfiguration.java
+src/main/java/org/openapitools/configuration/HomeController.java
+src/main/java/org/openapitools/configuration/SpringDocConfiguration.java
+src/main/java/org/openapitools/model/Addressable.java
+src/main/java/org/openapitools/model/Apple.java
+src/main/java/org/openapitools/model/Banana.java
+src/main/java/org/openapitools/model/Bar.java
+src/main/java/org/openapitools/model/BarCreate.java
+src/main/java/org/openapitools/model/BarRef.java
+src/main/java/org/openapitools/model/BarRefOrValue.java
+src/main/java/org/openapitools/model/Entity.java
+src/main/java/org/openapitools/model/EntityRef.java
+src/main/java/org/openapitools/model/Extensible.java
+src/main/java/org/openapitools/model/Foo.java
+src/main/java/org/openapitools/model/FooRef.java
+src/main/java/org/openapitools/model/FooRefOrValue.java
+src/main/java/org/openapitools/model/Fruit.java
+src/main/java/org/openapitools/model/FruitType.java
+src/main/java/org/openapitools/model/Pasta.java
+src/main/java/org/openapitools/model/Pizza.java
+src/main/java/org/openapitools/model/PizzaSpeziale.java
+src/main/resources/application.properties
+src/main/resources/openapi.yaml
+src/test/java/org/openapitools/OpenApiGeneratorApplicationTests.java

samples/openapi3/server/petstore/spring-boot-oneof-sealed/.openapi-generator/VERSION

@@ -0,0 +1 @@
+7.15.0-SNAPSHOT

samples/openapi3/server/petstore/spring-boot-oneof-sealed/README.md

@@ -0,0 +1,21 @@
+# OpenAPI generated server
+
+Spring Boot Server
+
+## Overview
+This server was generated by the [OpenAPI Generator](https://openapi-generator.tech) project.
+By using the [OpenAPI-Spec](https://openapis.org), you can easily generate a server stub.
+This is an example of building a OpenAPI-enabled server in Java using the SpringBoot framework.
+
+
+The underlying library integrating OpenAPI to Spring Boot is [springdoc](https://springdoc.org).
+Springdoc will generate an OpenAPI v3 specification based on the generated Controller and Model classes.
+The specification is available to download using the following url:
+http://localhost:8080/v3/api-docs/
+
+Start your server as a simple java application
+
+You can view the api documentation in swagger-ui by pointing to
+http://localhost:8080/swagger-ui.html
+
+Change default port value in application.properties

samples/openapi3/server/petstore/spring-boot-oneof-sealed/pom.xml

@@ -0,0 +1,82 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.openapitools.openapi3</groupId>
+    <artifactId>springboot-oneof-sealed</artifactId>
+    <packaging>jar</packaging>
+    <name>springboot-oneof-sealed</name>
+    <version>0.0.1-SNAPSHOT</version>
+    <properties>
+        <java.version>17</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <springdoc.version>1.6.14</springdoc.version>
+        <swagger-ui.version>5.3.1</swagger-ui.version>
+    </properties>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.7.15</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <build>
+        <sourceDirectory>src/main/java</sourceDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.data</groupId>
+            <artifactId>spring-data-commons</artifactId>
+        </dependency>
+          <!--SpringDoc dependencies -->
+        <dependency>
+            <groupId>org.springdoc</groupId>
+            <artifactId>springdoc-openapi-ui</artifactId>
+            <version>${springdoc.version}</version>
+        </dependency>
+        <!-- @Nullable annotation -->
+        <dependency>
+            <groupId>com.google.code.findbugs</groupId>
+            <artifactId>jsr305</artifactId>
+            <version>3.0.2</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.dataformat</groupId>
+            <artifactId>jackson-dataformat-yaml</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-jsr310</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.openapitools</groupId>
+            <artifactId>jackson-databind-nullable</artifactId>
+            <version>0.2.6</version>
+        </dependency>
+        <!-- Bean Validation API support -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/OpenApiGeneratorApplication.java

@@ -0,0 +1,30 @@
+package org.openapitools;
+
+import com.fasterxml.jackson.databind.Module;
+import org.openapitools.jackson.nullable.JsonNullableModule;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.FilterType;
+import org.springframework.context.annotation.FullyQualifiedAnnotationBeanNameGenerator;
+
+@SpringBootApplication(
+    nameGenerator = FullyQualifiedAnnotationBeanNameGenerator.class
+)
+@ComponentScan(
+    basePackages = {"org.openapitools", "org.openapitools.api" , "org.openapitools.configuration"},
+    nameGenerator = FullyQualifiedAnnotationBeanNameGenerator.class
+)
+public class OpenApiGeneratorApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(OpenApiGeneratorApplication.class, args);
+    }
+
+    @Bean(name = "org.openapitools.OpenApiGeneratorApplication.jsonNullableModule")
+    public Module jsonNullableModule() {
+        return new JsonNullableModule();
+    }
+
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/RFC3339DateFormat.java

@@ -0,0 +1,38 @@
+package org.openapitools;
+
+import com.fasterxml.jackson.databind.util.StdDateFormat;
+
+import java.text.DateFormat;
+import java.text.FieldPosition;
+import java.text.ParsePosition;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+
+public class RFC3339DateFormat extends DateFormat {
+  private static final long serialVersionUID = 1L;
+  private static final TimeZone TIMEZONE_Z = TimeZone.getTimeZone("UTC");
+
+  private final StdDateFormat fmt = new StdDateFormat()
+          .withTimeZone(TIMEZONE_Z)
+          .withColonInTimeZone(true);
+
+  public RFC3339DateFormat() {
+    this.calendar = new GregorianCalendar();
+  }
+
+  @Override
+  public Date parse(String source, ParsePosition pos) {
+    return fmt.parse(source, pos);
+  }
+
+  @Override
+  public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) {
+    return fmt.format(date, toAppendTo, fieldPosition);
+  }
+
+  @Override
+  public Object clone() {
+    return this;
+  }
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/api/ApiUtil.java

@@ -0,0 +1,19 @@
+package org.openapitools.api;
+
+import org.springframework.web.context.request.NativeWebRequest;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+public class ApiUtil {
+    public static void setExampleResponse(NativeWebRequest req, String contentType, String example) {
+        try {
+            HttpServletResponse res = req.getNativeResponse(HttpServletResponse.class);
+            res.setCharacterEncoding("UTF-8");
+            res.addHeader("Content-Type", contentType);
+            res.getWriter().print(example);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/api/BarApi.java

@@ -0,0 +1,86 @@
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) (7.15.0-SNAPSHOT).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+package org.openapitools.api;
+
+import org.openapitools.model.Bar;
+import org.openapitools.model.BarCreate;
+import io.swagger.v3.oas.annotations.ExternalDocumentation;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.Parameters;
+import io.swagger.v3.oas.annotations.media.ArraySchema;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.security.SecurityRequirement;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import io.swagger.v3.oas.annotations.enums.ParameterIn;
+import io.swagger.v3.oas.annotations.media.ExampleObject;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.lang.Nullable;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.multipart.MultipartFile;
+
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import javax.annotation.Generated;
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+@Validated
+@Tag(name = "Bar", description = "the Bar API")
+public interface BarApi {
+
+    default Optional<NativeWebRequest> getRequest() {
+        return Optional.empty();
+    }
+
+    /**
+     * POST /bar : Create a Bar
+     *
+     * @param barCreate  (required)
+     * @return Bar created (status code 200)
+     */
+    @Operation(
+        operationId = "createBar",
+        summary = "Create a Bar",
+        tags = { "Bar" },
+        responses = {
+            @ApiResponse(responseCode = "200", description = "Bar created", content = {
+                @Content(mediaType = "application/json", schema = @Schema(implementation = Bar.class))
+            })
+        }
+    )
+    @RequestMapping(
+        method = RequestMethod.POST,
+        value = "/bar",
+        produces = { "application/json" },
+        consumes = { "application/json" }
+    )
+    
+    default ResponseEntity<Bar> createBar(
+        @Parameter(name = "BarCreate", description = "", required = true) @Valid @RequestBody BarCreate barCreate
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "{ \"foo\" : { \"fooPropA\" : \"fooPropA\", \"fooPropB\" : \"fooPropB\" }, \"id\" : \"id\", \"fooPropB\" : \"fooPropB\", \"barPropA\" : \"barPropA\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/api/BarApiController.java

@@ -0,0 +1,48 @@
+package org.openapitools.api;
+
+import org.openapitools.model.Bar;
+import org.openapitools.model.BarCreate;
+
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.lang.Nullable;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.CookieValue;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RequestPart;
+import org.springframework.web.multipart.MultipartFile;
+import org.springframework.web.context.request.NativeWebRequest;
+
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import javax.annotation.Generated;
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+@Controller
+@RequestMapping("${openapi.byRefOrValue.base-path:}")
+public class BarApiController implements BarApi {
+
+    private final NativeWebRequest request;
+
+    @Autowired
+    public BarApiController(NativeWebRequest request) {
+        this.request = request;
+    }
+
+    @Override
+    public Optional<NativeWebRequest> getRequest() {
+        return Optional.ofNullable(request);
+    }
+
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/api/FooApi.java

@@ -0,0 +1,124 @@
+/**
+ * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech) (7.15.0-SNAPSHOT).
+ * https://openapi-generator.tech
+ * Do not edit the class manually.
+ */
+package org.openapitools.api;
+
+import org.openapitools.model.Foo;
+import org.openapitools.model.FooRefOrValue;
+import io.swagger.v3.oas.annotations.ExternalDocumentation;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.Parameters;
+import io.swagger.v3.oas.annotations.media.ArraySchema;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.security.SecurityRequirement;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import io.swagger.v3.oas.annotations.enums.ParameterIn;
+import io.swagger.v3.oas.annotations.media.ExampleObject;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.lang.Nullable;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.multipart.MultipartFile;
+
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import javax.annotation.Generated;
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+@Validated
+@Tag(name = "Foo", description = "the Foo API")
+public interface FooApi {
+
+    default Optional<NativeWebRequest> getRequest() {
+        return Optional.empty();
+    }
+
+    /**
+     * POST /foo : Create a Foo
+     *
+     * @param foo The Foo to be created (optional)
+     * @return Error (status code 201)
+     */
+    @Operation(
+        operationId = "createFoo",
+        summary = "Create a Foo",
+        tags = { "Foo" },
+        responses = {
+            @ApiResponse(responseCode = "201", description = "Error", content = {
+                @Content(mediaType = "application/json", schema = @Schema(implementation = FooRefOrValue.class))
+            })
+        }
+    )
+    @RequestMapping(
+        method = RequestMethod.POST,
+        value = "/foo",
+        produces = { "application/json" },
+        consumes = { "application/json;charset=utf-8" }
+    )
+    
+    default ResponseEntity<FooRefOrValue> createFoo(
+        @Parameter(name = "Foo", description = "The Foo to be created") @Valid @RequestBody(required = false) @Nullable Foo foo
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json"))) {
+                    String exampleString = "{ \"fooPropA\" : \"fooPropA\", \"fooPropB\" : \"fooPropB\" }";
+                    ApiUtil.setExampleResponse(request, "application/json", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+
+    /**
+     * GET /foo : GET all Foos
+     *
+     * @return Success (status code 200)
+     */
+    @Operation(
+        operationId = "getAllFoos",
+        summary = "GET all Foos",
+        tags = { "Foo" },
+        responses = {
+            @ApiResponse(responseCode = "200", description = "Success", content = {
+                @Content(mediaType = "application/json;charset=utf-8", array = @ArraySchema(schema = @Schema(implementation = FooRefOrValue.class)))
+            })
+        }
+    )
+    @RequestMapping(
+        method = RequestMethod.GET,
+        value = "/foo",
+        produces = { "application/json;charset=utf-8" }
+    )
+    
+    default ResponseEntity<List<FooRefOrValue>> getAllFoos(
+        
+    ) {
+        getRequest().ifPresent(request -> {
+            for (MediaType mediaType: MediaType.parseMediaTypes(request.getHeader("Accept"))) {
+                if (mediaType.isCompatibleWith(MediaType.valueOf("application/json;charset=utf-8"))) {
+                    String exampleString = "[ { \"fooPropA\" : \"fooPropA\", \"fooPropB\" : \"fooPropB\" }, { \"fooPropA\" : \"fooPropA\", \"fooPropB\" : \"fooPropB\" } ]";
+                    ApiUtil.setExampleResponse(request, "application/json;charset=utf-8", exampleString);
+                    break;
+                }
+            }
+        });
+        return new ResponseEntity<>(HttpStatus.NOT_IMPLEMENTED);
+
+    }
+
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/api/FooApiController.java

@@ -0,0 +1,48 @@
+package org.openapitools.api;
+
+import org.openapitools.model.Foo;
+import org.openapitools.model.FooRefOrValue;
+
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.lang.Nullable;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.CookieValue;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RequestPart;
+import org.springframework.web.multipart.MultipartFile;
+import org.springframework.web.context.request.NativeWebRequest;
+
+import javax.validation.constraints.*;
+import javax.validation.Valid;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import javax.annotation.Generated;
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+@Controller
+@RequestMapping("${openapi.byRefOrValue.base-path:}")
+public class FooApiController implements FooApi {
+
+    private final NativeWebRequest request;
+
+    @Autowired
+    public FooApiController(NativeWebRequest request) {
+        this.request = request;
+    }
+
+    @Override
+    public Optional<NativeWebRequest> getRequest() {
+        return Optional.ofNullable(request);
+    }
+
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/configuration/EnumConverterConfiguration.java

@@ -0,0 +1,22 @@
+package org.openapitools.configuration;
+
+import org.openapitools.model.FruitType;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.convert.converter.Converter;
+
+@Configuration(value = "org.openapitools.configuration.enumConverterConfiguration")
+public class EnumConverterConfiguration {
+
+    @Bean(name = "org.openapitools.configuration.EnumConverterConfiguration.fruitTypeConverter")
+    Converter<String, FruitType> fruitTypeConverter() {
+        return new Converter<String, FruitType>() {
+            @Override
+            public FruitType convert(String source) {
+                return FruitType.fromValue(source);
+            }
+        };
+    }
+
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/configuration/HomeController.java

@@ -0,0 +1,20 @@
+package org.openapitools.configuration;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.GetMapping;
+
+/**
+ * Home redirection to OpenAPI api documentation
+ */
+@Controller
+public class HomeController {
+
+    @RequestMapping("/")
+    public String index() {
+        return "redirect:swagger-ui.html";
+    }
+
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/configuration/SpringDocConfiguration.java

@@ -0,0 +1,27 @@
+package org.openapitools.configuration;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import io.swagger.v3.oas.models.OpenAPI;
+import io.swagger.v3.oas.models.info.Info;
+import io.swagger.v3.oas.models.info.Contact;
+import io.swagger.v3.oas.models.info.License;
+import io.swagger.v3.oas.models.Components;
+import io.swagger.v3.oas.models.security.SecurityScheme;
+
+@Configuration
+public class SpringDocConfiguration {
+
+    @Bean(name = "org.openapitools.configuration.SpringDocConfiguration.apiInfo")
+    OpenAPI apiInfo() {
+        return new OpenAPI()
+                .info(
+                        new Info()
+                                .title("ByRefOrValue")
+                                .description("This tests for a oneOf interface representation ")
+                                .version("0.0.1")
+                )
+        ;
+    }
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Addressable.java

@@ -0,0 +1,173 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Base schema for addressable entities
+ */
+
+@Schema(name = "Addressable", description = "Base schema for addressable entities")
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class Addressable {
+
+  private @Nullable String href;
+
+  private @Nullable String id;
+
+  public Addressable href(@Nullable String href) {
+    this.href = href;
+    return this;
+  }
+
+  /**
+   * Hyperlink reference
+   * @return href
+   */
+  
+  @Schema(name = "href", description = "Hyperlink reference", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("href")
+  public @Nullable String getHref() {
+    return href;
+  }
+
+  public void setHref(@Nullable String href) {
+    this.href = href;
+  }
+
+  public Addressable id(@Nullable String id) {
+    this.id = id;
+    return this;
+  }
+
+  /**
+   * unique identifier
+   * @return id
+   */
+  
+  @Schema(name = "id", description = "unique identifier", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("id")
+  public @Nullable String getId() {
+    return id;
+  }
+
+  public void setId(@Nullable String id) {
+    this.id = id;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Addressable addressable = (Addressable) o;
+    return Objects.equals(this.href, addressable.href) &&
+        Objects.equals(this.id, addressable.id);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(href, id);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Addressable {\n");
+    sb.append("    href: ").append(toIndentedString(href)).append("\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder {
+
+    private Addressable instance;
+
+    public Builder() {
+      this(new Addressable());
+    }
+
+    protected Builder(Addressable instance) {
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(Addressable value) { 
+      this.instance.setHref(value.href);
+      this.instance.setId(value.id);
+      return this;
+    }
+
+    public Addressable.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    public Addressable.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    /**
+    * returns a built Addressable instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public Addressable build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static Addressable.Builder builder() {
+    return new Addressable.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public Addressable.Builder toBuilder() {
+    Addressable.Builder builder = new Addressable.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Apple.java

@@ -0,0 +1,188 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import org.springframework.lang.Nullable;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Apple
+ */
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class Apple implements Fruit {
+
+  private Integer seeds;
+
+  private FruitType fruitType;
+
+  public Apple() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public Apple(Integer seeds) {
+    this.seeds = seeds;
+    this.fruitType = fruitType;
+  }
+
+  public Apple seeds(Integer seeds) {
+    this.seeds = seeds;
+    return this;
+  }
+
+  /**
+   * Get seeds
+   * @return seeds
+   */
+  @NotNull 
+  @Schema(name = "seeds", requiredMode = Schema.RequiredMode.REQUIRED)
+  @JsonProperty("seeds")
+  public Integer getSeeds() {
+    return seeds;
+  }
+
+  public void setSeeds(Integer seeds) {
+    this.seeds = seeds;
+  }
+
+  public Apple fruitType(FruitType fruitType) {
+    this.fruitType = fruitType;
+    return this;
+  }
+
+  /**
+   * Get fruitType
+   * @return fruitType
+   */
+  @NotNull @Valid 
+  @Schema(name = "fruitType", requiredMode = Schema.RequiredMode.REQUIRED)
+  @JsonProperty("fruitType")
+  public FruitType getFruitType() {
+    return fruitType;
+  }
+
+  public void setFruitType(FruitType fruitType) {
+    this.fruitType = fruitType;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Apple apple = (Apple) o;
+    return Objects.equals(this.seeds, apple.seeds) &&
+        Objects.equals(this.fruitType, apple.fruitType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(seeds, fruitType);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Apple {\n");
+    sb.append("    seeds: ").append(toIndentedString(seeds)).append("\n");
+    sb.append("    fruitType: ").append(toIndentedString(fruitType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder {
+
+    private Apple instance;
+
+    public Builder() {
+      this(new Apple());
+    }
+
+    protected Builder(Apple instance) {
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(Apple value) { 
+      this.instance.setSeeds(value.seeds);
+      this.instance.setFruitType(value.fruitType);
+      return this;
+    }
+
+    public Apple.Builder seeds(Integer seeds) {
+      this.instance.seeds(seeds);
+      return this;
+    }
+    
+    public Apple.Builder fruitType(FruitType fruitType) {
+      this.instance.fruitType(fruitType);
+      return this;
+    }
+    
+    /**
+    * returns a built Apple instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public Apple build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static Apple.Builder builder() {
+    return new Apple.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public Apple.Builder toBuilder() {
+    Apple.Builder builder = new Apple.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Banana.java

@@ -0,0 +1,188 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import org.springframework.lang.Nullable;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Banana
+ */
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class Banana implements Fruit {
+
+  private Integer length;
+
+  private FruitType fruitType;
+
+  public Banana() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public Banana(Integer length) {
+    this.length = length;
+    this.fruitType = fruitType;
+  }
+
+  public Banana length(Integer length) {
+    this.length = length;
+    return this;
+  }
+
+  /**
+   * Get length
+   * @return length
+   */
+  @NotNull 
+  @Schema(name = "length", requiredMode = Schema.RequiredMode.REQUIRED)
+  @JsonProperty("length")
+  public Integer getLength() {
+    return length;
+  }
+
+  public void setLength(Integer length) {
+    this.length = length;
+  }
+
+  public Banana fruitType(FruitType fruitType) {
+    this.fruitType = fruitType;
+    return this;
+  }
+
+  /**
+   * Get fruitType
+   * @return fruitType
+   */
+  @NotNull @Valid 
+  @Schema(name = "fruitType", requiredMode = Schema.RequiredMode.REQUIRED)
+  @JsonProperty("fruitType")
+  public FruitType getFruitType() {
+    return fruitType;
+  }
+
+  public void setFruitType(FruitType fruitType) {
+    this.fruitType = fruitType;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Banana banana = (Banana) o;
+    return Objects.equals(this.length, banana.length) &&
+        Objects.equals(this.fruitType, banana.fruitType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(length, fruitType);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Banana {\n");
+    sb.append("    length: ").append(toIndentedString(length)).append("\n");
+    sb.append("    fruitType: ").append(toIndentedString(fruitType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder {
+
+    private Banana instance;
+
+    public Builder() {
+      this(new Banana());
+    }
+
+    protected Builder(Banana instance) {
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(Banana value) { 
+      this.instance.setLength(value.length);
+      this.instance.setFruitType(value.fruitType);
+      return this;
+    }
+
+    public Banana.Builder length(Integer length) {
+      this.instance.length(length);
+      return this;
+    }
+    
+    public Banana.Builder fruitType(FruitType fruitType) {
+      this.instance.fruitType(fruitType);
+      return this;
+    }
+    
+    /**
+    * returns a built Banana instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public Banana build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static Banana.Builder builder() {
+    return new Banana.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public Banana.Builder toBuilder() {
+    Banana.Builder builder = new Banana.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Bar.java

@@ -0,0 +1,299 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import org.openapitools.model.Entity;
+import org.openapitools.model.FooRefOrValue;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Bar
+ */
+
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class Bar extends Entity implements BarRefOrValue {
+
+  private String id;
+
+  private @Nullable String barPropA;
+
+  private @Nullable String fooPropB;
+
+  private @Nullable FooRefOrValue foo;
+
+  public Bar() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public Bar(String id, String atType) {
+    super(atType);
+    this.id = id;
+  }
+
+  public Bar id(String id) {
+    this.id = id;
+    return this;
+  }
+
+  /**
+   * Get id
+   * @return id
+   */
+  @NotNull 
+  @Schema(name = "id", requiredMode = Schema.RequiredMode.REQUIRED)
+  @JsonProperty("id")
+  public String getId() {
+    return id;
+  }
+
+  public void setId(String id) {
+    this.id = id;
+  }
+
+  public Bar barPropA(@Nullable String barPropA) {
+    this.barPropA = barPropA;
+    return this;
+  }
+
+  /**
+   * Get barPropA
+   * @return barPropA
+   */
+  
+  @Schema(name = "barPropA", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("barPropA")
+  public @Nullable String getBarPropA() {
+    return barPropA;
+  }
+
+  public void setBarPropA(@Nullable String barPropA) {
+    this.barPropA = barPropA;
+  }
+
+  public Bar fooPropB(@Nullable String fooPropB) {
+    this.fooPropB = fooPropB;
+    return this;
+  }
+
+  /**
+   * Get fooPropB
+   * @return fooPropB
+   */
+  
+  @Schema(name = "fooPropB", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("fooPropB")
+  public @Nullable String getFooPropB() {
+    return fooPropB;
+  }
+
+  public void setFooPropB(@Nullable String fooPropB) {
+    this.fooPropB = fooPropB;
+  }
+
+  public Bar foo(@Nullable FooRefOrValue foo) {
+    this.foo = foo;
+    return this;
+  }
+
+  /**
+   * Get foo
+   * @return foo
+   */
+  @Valid 
+  @Schema(name = "foo", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("foo")
+  public @Nullable FooRefOrValue getFoo() {
+    return foo;
+  }
+
+  public void setFoo(@Nullable FooRefOrValue foo) {
+    this.foo = foo;
+  }
+
+
+  public Bar href(String href) {
+    super.href(href);
+    return this;
+  }
+
+  public Bar atSchemaLocation(String atSchemaLocation) {
+    super.atSchemaLocation(atSchemaLocation);
+    return this;
+  }
+
+  public Bar atBaseType(String atBaseType) {
+    super.atBaseType(atBaseType);
+    return this;
+  }
+
+  public Bar atType(String atType) {
+    super.atType(atType);
+    return this;
+  }
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Bar bar = (Bar) o;
+    return Objects.equals(this.id, bar.id) &&
+        Objects.equals(this.barPropA, bar.barPropA) &&
+        Objects.equals(this.fooPropB, bar.fooPropB) &&
+        Objects.equals(this.foo, bar.foo) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, barPropA, fooPropB, foo, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Bar {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    barPropA: ").append(toIndentedString(barPropA)).append("\n");
+    sb.append("    fooPropB: ").append(toIndentedString(fooPropB)).append("\n");
+    sb.append("    foo: ").append(toIndentedString(foo)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder extends Entity.Builder {
+
+    private Bar instance;
+
+    public Builder() {
+      this(new Bar());
+    }
+
+    protected Builder(Bar instance) {
+      super(instance); // the parent builder shares the same instance
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(Bar value) { 
+      super.copyOf(value);
+      this.instance.setId(value.id);
+      this.instance.setBarPropA(value.barPropA);
+      this.instance.setFooPropB(value.fooPropB);
+      this.instance.setFoo(value.foo);
+      return this;
+    }
+
+    public Bar.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    public Bar.Builder barPropA(String barPropA) {
+      this.instance.barPropA(barPropA);
+      return this;
+    }
+    
+    public Bar.Builder fooPropB(String fooPropB) {
+      this.instance.fooPropB(fooPropB);
+      return this;
+    }
+    
+    public Bar.Builder foo(FooRefOrValue foo) {
+      this.instance.foo(foo);
+      return this;
+    }
+    
+    @Override
+    public Bar.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    @Override
+    public Bar.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    @Override
+    public Bar.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    @Override
+    public Bar.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built Bar instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public Bar build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        super.build();
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static Bar.Builder builder() {
+    return new Bar.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public Bar.Builder toBuilder() {
+    Bar.Builder builder = new Bar.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/BarCreate.java

@@ -0,0 +1,281 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonTypeName;
+import org.openapitools.model.Entity;
+import org.openapitools.model.FooRefOrValue;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * BarCreate
+ */
+
+
+@JsonTypeName("Bar_Create")
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class BarCreate extends Entity {
+
+  private @Nullable String barPropA;
+
+  private @Nullable String fooPropB;
+
+  private @Nullable FooRefOrValue foo;
+
+  public BarCreate() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public BarCreate(String atType) {
+    super(atType);
+  }
+
+  public BarCreate barPropA(@Nullable String barPropA) {
+    this.barPropA = barPropA;
+    return this;
+  }
+
+  /**
+   * Get barPropA
+   * @return barPropA
+   */
+  
+  @Schema(name = "barPropA", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("barPropA")
+  public @Nullable String getBarPropA() {
+    return barPropA;
+  }
+
+  public void setBarPropA(@Nullable String barPropA) {
+    this.barPropA = barPropA;
+  }
+
+  public BarCreate fooPropB(@Nullable String fooPropB) {
+    this.fooPropB = fooPropB;
+    return this;
+  }
+
+  /**
+   * Get fooPropB
+   * @return fooPropB
+   */
+  
+  @Schema(name = "fooPropB", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("fooPropB")
+  public @Nullable String getFooPropB() {
+    return fooPropB;
+  }
+
+  public void setFooPropB(@Nullable String fooPropB) {
+    this.fooPropB = fooPropB;
+  }
+
+  public BarCreate foo(@Nullable FooRefOrValue foo) {
+    this.foo = foo;
+    return this;
+  }
+
+  /**
+   * Get foo
+   * @return foo
+   */
+  @Valid 
+  @Schema(name = "foo", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("foo")
+  public @Nullable FooRefOrValue getFoo() {
+    return foo;
+  }
+
+  public void setFoo(@Nullable FooRefOrValue foo) {
+    this.foo = foo;
+  }
+
+
+  public BarCreate href(String href) {
+    super.href(href);
+    return this;
+  }
+
+  public BarCreate id(String id) {
+    super.id(id);
+    return this;
+  }
+
+  public BarCreate atSchemaLocation(String atSchemaLocation) {
+    super.atSchemaLocation(atSchemaLocation);
+    return this;
+  }
+
+  public BarCreate atBaseType(String atBaseType) {
+    super.atBaseType(atBaseType);
+    return this;
+  }
+
+  public BarCreate atType(String atType) {
+    super.atType(atType);
+    return this;
+  }
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    BarCreate barCreate = (BarCreate) o;
+    return Objects.equals(this.barPropA, barCreate.barPropA) &&
+        Objects.equals(this.fooPropB, barCreate.fooPropB) &&
+        Objects.equals(this.foo, barCreate.foo) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(barPropA, fooPropB, foo, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class BarCreate {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    barPropA: ").append(toIndentedString(barPropA)).append("\n");
+    sb.append("    fooPropB: ").append(toIndentedString(fooPropB)).append("\n");
+    sb.append("    foo: ").append(toIndentedString(foo)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder extends Entity.Builder {
+
+    private BarCreate instance;
+
+    public Builder() {
+      this(new BarCreate());
+    }
+
+    protected Builder(BarCreate instance) {
+      super(instance); // the parent builder shares the same instance
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(BarCreate value) { 
+      super.copyOf(value);
+      this.instance.setBarPropA(value.barPropA);
+      this.instance.setFooPropB(value.fooPropB);
+      this.instance.setFoo(value.foo);
+      return this;
+    }
+
+    public BarCreate.Builder barPropA(String barPropA) {
+      this.instance.barPropA(barPropA);
+      return this;
+    }
+    
+    public BarCreate.Builder fooPropB(String fooPropB) {
+      this.instance.fooPropB(fooPropB);
+      return this;
+    }
+    
+    public BarCreate.Builder foo(FooRefOrValue foo) {
+      this.instance.foo(foo);
+      return this;
+    }
+    
+    @Override
+    public BarCreate.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    @Override
+    public BarCreate.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    @Override
+    public BarCreate.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    @Override
+    public BarCreate.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    @Override
+    public BarCreate.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built BarCreate instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public BarCreate build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        super.build();
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static BarCreate.Builder builder() {
+    return new BarCreate.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public BarCreate.Builder toBuilder() {
+    BarCreate.Builder builder = new BarCreate.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/BarRef.java

@@ -0,0 +1,209 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import org.openapitools.model.EntityRef;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * BarRef
+ */
+
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class BarRef extends EntityRef implements BarRefOrValue {
+
+  public BarRef() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public BarRef(String atType) {
+    super(atType);
+  }
+
+
+  public BarRef name(String name) {
+    super.name(name);
+    return this;
+  }
+
+  public BarRef atReferredType(String atReferredType) {
+    super.atReferredType(atReferredType);
+    return this;
+  }
+
+  public BarRef href(String href) {
+    super.href(href);
+    return this;
+  }
+
+  public BarRef id(String id) {
+    super.id(id);
+    return this;
+  }
+
+  public BarRef atSchemaLocation(String atSchemaLocation) {
+    super.atSchemaLocation(atSchemaLocation);
+    return this;
+  }
+
+  public BarRef atBaseType(String atBaseType) {
+    super.atBaseType(atBaseType);
+    return this;
+  }
+
+  public BarRef atType(String atType) {
+    super.atType(atType);
+    return this;
+  }
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    return super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class BarRef {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder extends EntityRef.Builder {
+
+    private BarRef instance;
+
+    public Builder() {
+      this(new BarRef());
+    }
+
+    protected Builder(BarRef instance) {
+      super(instance); // the parent builder shares the same instance
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(BarRef value) { 
+      super.copyOf(value);
+      return this;
+    }
+
+    @Override
+    public BarRef.Builder name(String name) {
+      this.instance.name(name);
+      return this;
+    }
+    
+    @Override
+    public BarRef.Builder atReferredType(String atReferredType) {
+      this.instance.atReferredType(atReferredType);
+      return this;
+    }
+    
+    @Override
+    public BarRef.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    @Override
+    public BarRef.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    @Override
+    public BarRef.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    @Override
+    public BarRef.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    @Override
+    public BarRef.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built BarRef instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public BarRef build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        super.build();
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static BarRef.Builder builder() {
+    return new BarRef.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public BarRef.Builder toBuilder() {
+    BarRef.Builder builder = new BarRef.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/BarRefOrValue.java

@@ -0,0 +1,38 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import org.openapitools.model.Bar;
+import org.openapitools.model.BarRef;
+import org.openapitools.model.FooRefOrValue;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+
+@JsonIgnoreProperties(
+  value = "@type", // ignore manually set @type, it will be automatically generated by Jackson during serialization
+  allowSetters = true // allows the @type to be set during deserialization
+)
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "@type", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = Bar.class, name = "Bar"),
+  @JsonSubTypes.Type(value = BarRef.class, name = "BarRef")
+})
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public sealed interface BarRefOrValue permits Bar, BarRef {
+    public String getAtType();
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Entity.java

@@ -0,0 +1,290 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Entity
+ */
+
+@JsonIgnoreProperties(
+  value = "@type", // ignore manually set @type, it will be automatically generated by Jackson during serialization
+  allowSetters = true // allows the @type to be set during deserialization
+)
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "@type", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = Bar.class, name = "Bar"),
+  @JsonSubTypes.Type(value = BarCreate.class, name = "Bar_Create"),
+  @JsonSubTypes.Type(value = Foo.class, name = "Foo"),
+  @JsonSubTypes.Type(value = Pasta.class, name = "Pasta"),
+  @JsonSubTypes.Type(value = Pizza.class, name = "Pizza"),
+  @JsonSubTypes.Type(value = PizzaSpeziale.class, name = "PizzaSpeziale")
+})
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public sealed class Entity permits Bar, BarCreate, Foo, Pasta, Pizza {
+
+  private @Nullable String href;
+
+  private @Nullable String id;
+
+  private @Nullable String atSchemaLocation;
+
+  private @Nullable String atBaseType;
+
+  private String atType;
+
+  public Entity() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public Entity(String atType) {
+    this.atType = atType;
+  }
+
+  public Entity href(@Nullable String href) {
+    this.href = href;
+    return this;
+  }
+
+  /**
+   * Hyperlink reference
+   * @return href
+   */
+  
+  @Schema(name = "href", description = "Hyperlink reference", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("href")
+  public @Nullable String getHref() {
+    return href;
+  }
+
+  public void setHref(@Nullable String href) {
+    this.href = href;
+  }
+
+  public Entity id(@Nullable String id) {
+    this.id = id;
+    return this;
+  }
+
+  /**
+   * unique identifier
+   * @return id
+   */
+  
+  @Schema(name = "id", description = "unique identifier", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("id")
+  public @Nullable String getId() {
+    return id;
+  }
+
+  public void setId(@Nullable String id) {
+    this.id = id;
+  }
+
+  public Entity atSchemaLocation(@Nullable String atSchemaLocation) {
+    this.atSchemaLocation = atSchemaLocation;
+    return this;
+  }
+
+  /**
+   * A URI to a JSON-Schema file that defines additional attributes and relationships
+   * @return atSchemaLocation
+   */
+  
+  @Schema(name = "@schemaLocation", description = "A URI to a JSON-Schema file that defines additional attributes and relationships", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("@schemaLocation")
+  public @Nullable String getAtSchemaLocation() {
+    return atSchemaLocation;
+  }
+
+  public void setAtSchemaLocation(@Nullable String atSchemaLocation) {
+    this.atSchemaLocation = atSchemaLocation;
+  }
+
+  public Entity atBaseType(@Nullable String atBaseType) {
+    this.atBaseType = atBaseType;
+    return this;
+  }
+
+  /**
+   * When sub-classing, this defines the super-class
+   * @return atBaseType
+   */
+  
+  @Schema(name = "@baseType", description = "When sub-classing, this defines the super-class", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("@baseType")
+  public @Nullable String getAtBaseType() {
+    return atBaseType;
+  }
+
+  public void setAtBaseType(@Nullable String atBaseType) {
+    this.atBaseType = atBaseType;
+  }
+
+  public Entity atType(String atType) {
+    this.atType = atType;
+    return this;
+  }
+
+  /**
+   * When sub-classing, this defines the sub-class Extensible name
+   * @return atType
+   */
+  @NotNull 
+  @Schema(name = "@type", description = "When sub-classing, this defines the sub-class Extensible name", requiredMode = Schema.RequiredMode.REQUIRED)
+  @JsonProperty("@type")
+  public String getAtType() {
+    return atType;
+  }
+
+  public void setAtType(String atType) {
+    this.atType = atType;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Entity entity = (Entity) o;
+    return Objects.equals(this.href, entity.href) &&
+        Objects.equals(this.id, entity.id) &&
+        Objects.equals(this.atSchemaLocation, entity.atSchemaLocation) &&
+        Objects.equals(this.atBaseType, entity.atBaseType) &&
+        Objects.equals(this.atType, entity.atType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(href, id, atSchemaLocation, atBaseType, atType);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Entity {\n");
+    sb.append("    href: ").append(toIndentedString(href)).append("\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    atSchemaLocation: ").append(toIndentedString(atSchemaLocation)).append("\n");
+    sb.append("    atBaseType: ").append(toIndentedString(atBaseType)).append("\n");
+    sb.append("    atType: ").append(toIndentedString(atType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder {
+
+    private Entity instance;
+
+    public Builder() {
+      this(new Entity());
+    }
+
+    protected Builder(Entity instance) {
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(Entity value) { 
+      this.instance.setHref(value.href);
+      this.instance.setId(value.id);
+      this.instance.setAtSchemaLocation(value.atSchemaLocation);
+      this.instance.setAtBaseType(value.atBaseType);
+      this.instance.setAtType(value.atType);
+      return this;
+    }
+
+    public Entity.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    public Entity.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    public Entity.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    public Entity.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    public Entity.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built Entity instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public Entity build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static Entity.Builder builder() {
+    return new Entity.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public Entity.Builder toBuilder() {
+    Entity.Builder builder = new Entity.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/EntityRef.java

@@ -0,0 +1,347 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Entity reference schema to be use for all entityRef class.
+ */
+
+@Schema(name = "EntityRef", description = "Entity reference schema to be use for all entityRef class.")
+@JsonIgnoreProperties(
+  value = "@type", // ignore manually set @type, it will be automatically generated by Jackson during serialization
+  allowSetters = true // allows the @type to be set during deserialization
+)
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "@type", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = BarRef.class, name = "BarRef"),
+  @JsonSubTypes.Type(value = FooRef.class, name = "FooRef")
+})
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public sealed class EntityRef permits BarRef, FooRef {
+
+  private @Nullable String name;
+
+  private @Nullable String atReferredType;
+
+  private @Nullable String href;
+
+  private @Nullable String id;
+
+  private @Nullable String atSchemaLocation;
+
+  private @Nullable String atBaseType;
+
+  private String atType;
+
+  public EntityRef() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public EntityRef(String atType) {
+    this.atType = atType;
+  }
+
+  public EntityRef name(@Nullable String name) {
+    this.name = name;
+    return this;
+  }
+
+  /**
+   * Name of the related entity.
+   * @return name
+   */
+  
+  @Schema(name = "name", description = "Name of the related entity.", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("name")
+  public @Nullable String getName() {
+    return name;
+  }
+
+  public void setName(@Nullable String name) {
+    this.name = name;
+  }
+
+  public EntityRef atReferredType(@Nullable String atReferredType) {
+    this.atReferredType = atReferredType;
+    return this;
+  }
+
+  /**
+   * The actual type of the target instance when needed for disambiguation.
+   * @return atReferredType
+   */
+  
+  @Schema(name = "@referredType", description = "The actual type of the target instance when needed for disambiguation.", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("@referredType")
+  public @Nullable String getAtReferredType() {
+    return atReferredType;
+  }
+
+  public void setAtReferredType(@Nullable String atReferredType) {
+    this.atReferredType = atReferredType;
+  }
+
+  public EntityRef href(@Nullable String href) {
+    this.href = href;
+    return this;
+  }
+
+  /**
+   * Hyperlink reference
+   * @return href
+   */
+  
+  @Schema(name = "href", description = "Hyperlink reference", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("href")
+  public @Nullable String getHref() {
+    return href;
+  }
+
+  public void setHref(@Nullable String href) {
+    this.href = href;
+  }
+
+  public EntityRef id(@Nullable String id) {
+    this.id = id;
+    return this;
+  }
+
+  /**
+   * unique identifier
+   * @return id
+   */
+  
+  @Schema(name = "id", description = "unique identifier", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("id")
+  public @Nullable String getId() {
+    return id;
+  }
+
+  public void setId(@Nullable String id) {
+    this.id = id;
+  }
+
+  public EntityRef atSchemaLocation(@Nullable String atSchemaLocation) {
+    this.atSchemaLocation = atSchemaLocation;
+    return this;
+  }
+
+  /**
+   * A URI to a JSON-Schema file that defines additional attributes and relationships
+   * @return atSchemaLocation
+   */
+  
+  @Schema(name = "@schemaLocation", description = "A URI to a JSON-Schema file that defines additional attributes and relationships", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("@schemaLocation")
+  public @Nullable String getAtSchemaLocation() {
+    return atSchemaLocation;
+  }
+
+  public void setAtSchemaLocation(@Nullable String atSchemaLocation) {
+    this.atSchemaLocation = atSchemaLocation;
+  }
+
+  public EntityRef atBaseType(@Nullable String atBaseType) {
+    this.atBaseType = atBaseType;
+    return this;
+  }
+
+  /**
+   * When sub-classing, this defines the super-class
+   * @return atBaseType
+   */
+  
+  @Schema(name = "@baseType", description = "When sub-classing, this defines the super-class", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("@baseType")
+  public @Nullable String getAtBaseType() {
+    return atBaseType;
+  }
+
+  public void setAtBaseType(@Nullable String atBaseType) {
+    this.atBaseType = atBaseType;
+  }
+
+  public EntityRef atType(String atType) {
+    this.atType = atType;
+    return this;
+  }
+
+  /**
+   * When sub-classing, this defines the sub-class Extensible name
+   * @return atType
+   */
+  @NotNull 
+  @Schema(name = "@type", description = "When sub-classing, this defines the sub-class Extensible name", requiredMode = Schema.RequiredMode.REQUIRED)
+  @JsonProperty("@type")
+  public String getAtType() {
+    return atType;
+  }
+
+  public void setAtType(String atType) {
+    this.atType = atType;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    EntityRef entityRef = (EntityRef) o;
+    return Objects.equals(this.name, entityRef.name) &&
+        Objects.equals(this.atReferredType, entityRef.atReferredType) &&
+        Objects.equals(this.href, entityRef.href) &&
+        Objects.equals(this.id, entityRef.id) &&
+        Objects.equals(this.atSchemaLocation, entityRef.atSchemaLocation) &&
+        Objects.equals(this.atBaseType, entityRef.atBaseType) &&
+        Objects.equals(this.atType, entityRef.atType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(name, atReferredType, href, id, atSchemaLocation, atBaseType, atType);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class EntityRef {\n");
+    sb.append("    name: ").append(toIndentedString(name)).append("\n");
+    sb.append("    atReferredType: ").append(toIndentedString(atReferredType)).append("\n");
+    sb.append("    href: ").append(toIndentedString(href)).append("\n");
+    sb.append("    id: ").append(toIndentedString(id)).append("\n");
+    sb.append("    atSchemaLocation: ").append(toIndentedString(atSchemaLocation)).append("\n");
+    sb.append("    atBaseType: ").append(toIndentedString(atBaseType)).append("\n");
+    sb.append("    atType: ").append(toIndentedString(atType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder {
+
+    private EntityRef instance;
+
+    public Builder() {
+      this(new EntityRef());
+    }
+
+    protected Builder(EntityRef instance) {
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(EntityRef value) { 
+      this.instance.setName(value.name);
+      this.instance.setAtReferredType(value.atReferredType);
+      this.instance.setHref(value.href);
+      this.instance.setId(value.id);
+      this.instance.setAtSchemaLocation(value.atSchemaLocation);
+      this.instance.setAtBaseType(value.atBaseType);
+      this.instance.setAtType(value.atType);
+      return this;
+    }
+
+    public EntityRef.Builder name(String name) {
+      this.instance.name(name);
+      return this;
+    }
+    
+    public EntityRef.Builder atReferredType(String atReferredType) {
+      this.instance.atReferredType(atReferredType);
+      return this;
+    }
+    
+    public EntityRef.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    public EntityRef.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    public EntityRef.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    public EntityRef.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    public EntityRef.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built EntityRef instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public EntityRef build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static EntityRef.Builder builder() {
+    return new EntityRef.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public EntityRef.Builder toBuilder() {
+    EntityRef.Builder builder = new EntityRef.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Extensible.java

@@ -0,0 +1,213 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Extensible
+ */
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class Extensible {
+
+  private @Nullable String atSchemaLocation;
+
+  private @Nullable String atBaseType;
+
+  private String atType;
+
+  public Extensible() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public Extensible(String atType) {
+    this.atType = atType;
+  }
+
+  public Extensible atSchemaLocation(@Nullable String atSchemaLocation) {
+    this.atSchemaLocation = atSchemaLocation;
+    return this;
+  }
+
+  /**
+   * A URI to a JSON-Schema file that defines additional attributes and relationships
+   * @return atSchemaLocation
+   */
+  
+  @Schema(name = "@schemaLocation", description = "A URI to a JSON-Schema file that defines additional attributes and relationships", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("@schemaLocation")
+  public @Nullable String getAtSchemaLocation() {
+    return atSchemaLocation;
+  }
+
+  public void setAtSchemaLocation(@Nullable String atSchemaLocation) {
+    this.atSchemaLocation = atSchemaLocation;
+  }
+
+  public Extensible atBaseType(@Nullable String atBaseType) {
+    this.atBaseType = atBaseType;
+    return this;
+  }
+
+  /**
+   * When sub-classing, this defines the super-class
+   * @return atBaseType
+   */
+  
+  @Schema(name = "@baseType", description = "When sub-classing, this defines the super-class", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("@baseType")
+  public @Nullable String getAtBaseType() {
+    return atBaseType;
+  }
+
+  public void setAtBaseType(@Nullable String atBaseType) {
+    this.atBaseType = atBaseType;
+  }
+
+  public Extensible atType(String atType) {
+    this.atType = atType;
+    return this;
+  }
+
+  /**
+   * When sub-classing, this defines the sub-class Extensible name
+   * @return atType
+   */
+  @NotNull 
+  @Schema(name = "@type", description = "When sub-classing, this defines the sub-class Extensible name", requiredMode = Schema.RequiredMode.REQUIRED)
+  @JsonProperty("@type")
+  public String getAtType() {
+    return atType;
+  }
+
+  public void setAtType(String atType) {
+    this.atType = atType;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Extensible extensible = (Extensible) o;
+    return Objects.equals(this.atSchemaLocation, extensible.atSchemaLocation) &&
+        Objects.equals(this.atBaseType, extensible.atBaseType) &&
+        Objects.equals(this.atType, extensible.atType);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(atSchemaLocation, atBaseType, atType);
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Extensible {\n");
+    sb.append("    atSchemaLocation: ").append(toIndentedString(atSchemaLocation)).append("\n");
+    sb.append("    atBaseType: ").append(toIndentedString(atBaseType)).append("\n");
+    sb.append("    atType: ").append(toIndentedString(atType)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder {
+
+    private Extensible instance;
+
+    public Builder() {
+      this(new Extensible());
+    }
+
+    protected Builder(Extensible instance) {
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(Extensible value) { 
+      this.instance.setAtSchemaLocation(value.atSchemaLocation);
+      this.instance.setAtBaseType(value.atBaseType);
+      this.instance.setAtType(value.atType);
+      return this;
+    }
+
+    public Extensible.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    public Extensible.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    public Extensible.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built Extensible instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public Extensible build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static Extensible.Builder builder() {
+    return new Extensible.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public Extensible.Builder toBuilder() {
+    Extensible.Builder builder = new Extensible.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Foo.java

@@ -0,0 +1,248 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import org.openapitools.model.Entity;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Foo
+ */
+
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class Foo extends Entity implements FooRefOrValue {
+
+  private @Nullable String fooPropA;
+
+  private @Nullable String fooPropB;
+
+  public Foo() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public Foo(String atType) {
+    super(atType);
+  }
+
+  public Foo fooPropA(@Nullable String fooPropA) {
+    this.fooPropA = fooPropA;
+    return this;
+  }
+
+  /**
+   * Get fooPropA
+   * @return fooPropA
+   */
+  
+  @Schema(name = "fooPropA", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("fooPropA")
+  public @Nullable String getFooPropA() {
+    return fooPropA;
+  }
+
+  public void setFooPropA(@Nullable String fooPropA) {
+    this.fooPropA = fooPropA;
+  }
+
+  public Foo fooPropB(@Nullable String fooPropB) {
+    this.fooPropB = fooPropB;
+    return this;
+  }
+
+  /**
+   * Get fooPropB
+   * @return fooPropB
+   */
+  
+  @Schema(name = "fooPropB", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("fooPropB")
+  public @Nullable String getFooPropB() {
+    return fooPropB;
+  }
+
+  public void setFooPropB(@Nullable String fooPropB) {
+    this.fooPropB = fooPropB;
+  }
+
+
+  public Foo href(String href) {
+    super.href(href);
+    return this;
+  }
+
+  public Foo id(String id) {
+    super.id(id);
+    return this;
+  }
+
+  public Foo atSchemaLocation(String atSchemaLocation) {
+    super.atSchemaLocation(atSchemaLocation);
+    return this;
+  }
+
+  public Foo atBaseType(String atBaseType) {
+    super.atBaseType(atBaseType);
+    return this;
+  }
+
+  public Foo atType(String atType) {
+    super.atType(atType);
+    return this;
+  }
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Foo foo = (Foo) o;
+    return Objects.equals(this.fooPropA, foo.fooPropA) &&
+        Objects.equals(this.fooPropB, foo.fooPropB) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(fooPropA, fooPropB, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Foo {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    fooPropA: ").append(toIndentedString(fooPropA)).append("\n");
+    sb.append("    fooPropB: ").append(toIndentedString(fooPropB)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder extends Entity.Builder {
+
+    private Foo instance;
+
+    public Builder() {
+      this(new Foo());
+    }
+
+    protected Builder(Foo instance) {
+      super(instance); // the parent builder shares the same instance
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(Foo value) { 
+      super.copyOf(value);
+      this.instance.setFooPropA(value.fooPropA);
+      this.instance.setFooPropB(value.fooPropB);
+      return this;
+    }
+
+    public Foo.Builder fooPropA(String fooPropA) {
+      this.instance.fooPropA(fooPropA);
+      return this;
+    }
+    
+    public Foo.Builder fooPropB(String fooPropB) {
+      this.instance.fooPropB(fooPropB);
+      return this;
+    }
+    
+    @Override
+    public Foo.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    @Override
+    public Foo.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    @Override
+    public Foo.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    @Override
+    public Foo.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    @Override
+    public Foo.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built Foo instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public Foo build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        super.build();
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static Foo.Builder builder() {
+    return new Foo.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public Foo.Builder toBuilder() {
+    Foo.Builder builder = new Foo.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/FooRef.java

@@ -0,0 +1,240 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import org.openapitools.model.EntityRef;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * FooRef
+ */
+
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class FooRef extends EntityRef implements FooRefOrValue {
+
+  private @Nullable String foorefPropA;
+
+  public FooRef() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public FooRef(String atType) {
+    super(atType);
+  }
+
+  public FooRef foorefPropA(@Nullable String foorefPropA) {
+    this.foorefPropA = foorefPropA;
+    return this;
+  }
+
+  /**
+   * Get foorefPropA
+   * @return foorefPropA
+   */
+  
+  @Schema(name = "foorefPropA", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("foorefPropA")
+  public @Nullable String getFoorefPropA() {
+    return foorefPropA;
+  }
+
+  public void setFoorefPropA(@Nullable String foorefPropA) {
+    this.foorefPropA = foorefPropA;
+  }
+
+
+  public FooRef name(String name) {
+    super.name(name);
+    return this;
+  }
+
+  public FooRef atReferredType(String atReferredType) {
+    super.atReferredType(atReferredType);
+    return this;
+  }
+
+  public FooRef href(String href) {
+    super.href(href);
+    return this;
+  }
+
+  public FooRef id(String id) {
+    super.id(id);
+    return this;
+  }
+
+  public FooRef atSchemaLocation(String atSchemaLocation) {
+    super.atSchemaLocation(atSchemaLocation);
+    return this;
+  }
+
+  public FooRef atBaseType(String atBaseType) {
+    super.atBaseType(atBaseType);
+    return this;
+  }
+
+  public FooRef atType(String atType) {
+    super.atType(atType);
+    return this;
+  }
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    FooRef fooRef = (FooRef) o;
+    return Objects.equals(this.foorefPropA, fooRef.foorefPropA) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(foorefPropA, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class FooRef {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    foorefPropA: ").append(toIndentedString(foorefPropA)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder extends EntityRef.Builder {
+
+    private FooRef instance;
+
+    public Builder() {
+      this(new FooRef());
+    }
+
+    protected Builder(FooRef instance) {
+      super(instance); // the parent builder shares the same instance
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(FooRef value) { 
+      super.copyOf(value);
+      this.instance.setFoorefPropA(value.foorefPropA);
+      return this;
+    }
+
+    public FooRef.Builder foorefPropA(String foorefPropA) {
+      this.instance.foorefPropA(foorefPropA);
+      return this;
+    }
+    
+    @Override
+    public FooRef.Builder name(String name) {
+      this.instance.name(name);
+      return this;
+    }
+    
+    @Override
+    public FooRef.Builder atReferredType(String atReferredType) {
+      this.instance.atReferredType(atReferredType);
+      return this;
+    }
+    
+    @Override
+    public FooRef.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    @Override
+    public FooRef.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    @Override
+    public FooRef.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    @Override
+    public FooRef.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    @Override
+    public FooRef.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built FooRef instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public FooRef build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        super.build();
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static FooRef.Builder builder() {
+    return new FooRef.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public FooRef.Builder toBuilder() {
+    FooRef.Builder builder = new FooRef.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/FooRefOrValue.java

@@ -0,0 +1,37 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import org.openapitools.model.Foo;
+import org.openapitools.model.FooRef;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+
+@JsonIgnoreProperties(
+  value = "@type", // ignore manually set @type, it will be automatically generated by Jackson during serialization
+  allowSetters = true // allows the @type to be set during deserialization
+)
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "@type", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = Foo.class, name = "Foo"),
+  @JsonSubTypes.Type(value = FooRef.class, name = "FooRef")
+})
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public sealed interface FooRefOrValue permits Foo, FooRef {
+    public String getAtType();
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Fruit.java

@@ -0,0 +1,41 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.openapitools.model.Apple;
+import org.openapitools.model.Banana;
+import org.openapitools.model.FruitType;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+
+@JsonIgnoreProperties(
+  value = "fruitType", // ignore manually set fruitType, it will be automatically generated by Jackson during serialization
+  allowSetters = true // allows the fruitType to be set during deserialization
+)
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "fruitType", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = Apple.class, name = "APPLE"),
+  @JsonSubTypes.Type(value = Banana.class, name = "BANANA"),
+  @JsonSubTypes.Type(value = Apple.class, name = "Apple"),
+  @JsonSubTypes.Type(value = Banana.class, name = "Banana")
+})
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public sealed interface Fruit permits Apple, Banana {
+    public FruitType getFruitType();
+}

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/FruitType.java

@@ -0,0 +1,56 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonValue;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
+/**
+ * Gets or Sets FruitType
+ */
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public enum FruitType {
+  
+  APPLE("APPLE"),
+  
+  BANANA("BANANA");
+
+  private final String value;
+
+  FruitType(String value) {
+    this.value = value;
+  }
+
+  @JsonValue
+  public String getValue() {
+    return value;
+  }
+
+  @Override
+  public String toString() {
+    return String.valueOf(value);
+  }
+
+  @JsonCreator
+  public static FruitType fromValue(String value) {
+    for (FruitType b : FruitType.values()) {
+      if (b.value.equals(value)) {
+        return b;
+      }
+    }
+    throw new IllegalArgumentException("Unexpected value '" + value + "'");
+  }
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Pasta.java

@@ -0,0 +1,218 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import org.openapitools.model.Entity;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Pasta
+ */
+
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class Pasta extends Entity {
+
+  private @Nullable String vendor;
+
+  public Pasta() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public Pasta(String atType) {
+    super(atType);
+  }
+
+  public Pasta vendor(@Nullable String vendor) {
+    this.vendor = vendor;
+    return this;
+  }
+
+  /**
+   * Get vendor
+   * @return vendor
+   */
+  
+  @Schema(name = "vendor", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("vendor")
+  public @Nullable String getVendor() {
+    return vendor;
+  }
+
+  public void setVendor(@Nullable String vendor) {
+    this.vendor = vendor;
+  }
+
+
+  public Pasta href(String href) {
+    super.href(href);
+    return this;
+  }
+
+  public Pasta id(String id) {
+    super.id(id);
+    return this;
+  }
+
+  public Pasta atSchemaLocation(String atSchemaLocation) {
+    super.atSchemaLocation(atSchemaLocation);
+    return this;
+  }
+
+  public Pasta atBaseType(String atBaseType) {
+    super.atBaseType(atBaseType);
+    return this;
+  }
+
+  public Pasta atType(String atType) {
+    super.atType(atType);
+    return this;
+  }
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Pasta pasta = (Pasta) o;
+    return Objects.equals(this.vendor, pasta.vendor) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(vendor, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Pasta {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    vendor: ").append(toIndentedString(vendor)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder extends Entity.Builder {
+
+    private Pasta instance;
+
+    public Builder() {
+      this(new Pasta());
+    }
+
+    protected Builder(Pasta instance) {
+      super(instance); // the parent builder shares the same instance
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(Pasta value) { 
+      super.copyOf(value);
+      this.instance.setVendor(value.vendor);
+      return this;
+    }
+
+    public Pasta.Builder vendor(String vendor) {
+      this.instance.vendor(vendor);
+      return this;
+    }
+    
+    @Override
+    public Pasta.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    @Override
+    public Pasta.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    @Override
+    public Pasta.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    @Override
+    public Pasta.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    @Override
+    public Pasta.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built Pasta instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public Pasta build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        super.build();
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static Pasta.Builder builder() {
+    return new Pasta.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public Pasta.Builder toBuilder() {
+    Pasta.Builder builder = new Pasta.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/Pizza.java

@@ -0,0 +1,227 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import java.math.BigDecimal;
+import org.openapitools.model.Entity;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * Pizza
+ */
+
+@JsonIgnoreProperties(
+  value = "@type", // ignore manually set @type, it will be automatically generated by Jackson during serialization
+  allowSetters = true // allows the @type to be set during deserialization
+)
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "@type", visible = true)
+@JsonSubTypes({
+  @JsonSubTypes.Type(value = PizzaSpeziale.class, name = "PizzaSpeziale")
+})
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public sealed class Pizza extends Entity permits PizzaSpeziale {
+
+  private @Nullable BigDecimal pizzaSize;
+
+  public Pizza() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public Pizza(String atType) {
+    super(atType);
+  }
+
+  public Pizza pizzaSize(@Nullable BigDecimal pizzaSize) {
+    this.pizzaSize = pizzaSize;
+    return this;
+  }
+
+  /**
+   * Get pizzaSize
+   * @return pizzaSize
+   */
+  @Valid 
+  @Schema(name = "pizzaSize", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("pizzaSize")
+  public @Nullable BigDecimal getPizzaSize() {
+    return pizzaSize;
+  }
+
+  public void setPizzaSize(@Nullable BigDecimal pizzaSize) {
+    this.pizzaSize = pizzaSize;
+  }
+
+
+  public Pizza href(String href) {
+    super.href(href);
+    return this;
+  }
+
+  public Pizza id(String id) {
+    super.id(id);
+    return this;
+  }
+
+  public Pizza atSchemaLocation(String atSchemaLocation) {
+    super.atSchemaLocation(atSchemaLocation);
+    return this;
+  }
+
+  public Pizza atBaseType(String atBaseType) {
+    super.atBaseType(atBaseType);
+    return this;
+  }
+
+  public Pizza atType(String atType) {
+    super.atType(atType);
+    return this;
+  }
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Pizza pizza = (Pizza) o;
+    return Objects.equals(this.pizzaSize, pizza.pizzaSize) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(pizzaSize, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class Pizza {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    pizzaSize: ").append(toIndentedString(pizzaSize)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder extends Entity.Builder {
+
+    private Pizza instance;
+
+    public Builder() {
+      this(new Pizza());
+    }
+
+    protected Builder(Pizza instance) {
+      super(instance); // the parent builder shares the same instance
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(Pizza value) { 
+      super.copyOf(value);
+      this.instance.setPizzaSize(value.pizzaSize);
+      return this;
+    }
+
+    public Pizza.Builder pizzaSize(BigDecimal pizzaSize) {
+      this.instance.pizzaSize(pizzaSize);
+      return this;
+    }
+    
+    @Override
+    public Pizza.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    @Override
+    public Pizza.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    @Override
+    public Pizza.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    @Override
+    public Pizza.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    @Override
+    public Pizza.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built Pizza instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public Pizza build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        super.build();
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static Pizza.Builder builder() {
+    return new Pizza.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public Pizza.Builder toBuilder() {
+    Pizza.Builder builder = new Pizza.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/java/org/openapitools/model/PizzaSpeziale.java

@@ -0,0 +1,230 @@
+package org.openapitools.model;
+
+import java.net.URI;
+import java.util.Objects;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import java.math.BigDecimal;
+import org.openapitools.model.Pizza;
+import org.springframework.lang.Nullable;
+import org.openapitools.jackson.nullable.JsonNullable;
+import java.time.OffsetDateTime;
+import javax.validation.Valid;
+import javax.validation.constraints.*;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+
+import java.util.*;
+import javax.annotation.Generated;
+
+/**
+ * PizzaSpeziale
+ */
+
+
+@Generated(value = "org.openapitools.codegen.languages.SpringCodegen", comments = "Generator version: 7.15.0-SNAPSHOT")
+public final class PizzaSpeziale extends Pizza {
+
+  private @Nullable String toppings;
+
+  public PizzaSpeziale() {
+    super();
+  }
+
+  /**
+   * Constructor with only required parameters
+   */
+  public PizzaSpeziale(String atType) {
+    super(atType);
+  }
+
+  public PizzaSpeziale toppings(@Nullable String toppings) {
+    this.toppings = toppings;
+    return this;
+  }
+
+  /**
+   * Get toppings
+   * @return toppings
+   */
+  
+  @Schema(name = "toppings", requiredMode = Schema.RequiredMode.NOT_REQUIRED)
+  @JsonProperty("toppings")
+  public @Nullable String getToppings() {
+    return toppings;
+  }
+
+  public void setToppings(@Nullable String toppings) {
+    this.toppings = toppings;
+  }
+
+
+  public PizzaSpeziale pizzaSize(BigDecimal pizzaSize) {
+    super.pizzaSize(pizzaSize);
+    return this;
+  }
+
+  public PizzaSpeziale href(String href) {
+    super.href(href);
+    return this;
+  }
+
+  public PizzaSpeziale id(String id) {
+    super.id(id);
+    return this;
+  }
+
+  public PizzaSpeziale atSchemaLocation(String atSchemaLocation) {
+    super.atSchemaLocation(atSchemaLocation);
+    return this;
+  }
+
+  public PizzaSpeziale atBaseType(String atBaseType) {
+    super.atBaseType(atBaseType);
+    return this;
+  }
+
+  public PizzaSpeziale atType(String atType) {
+    super.atType(atType);
+    return this;
+  }
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    PizzaSpeziale pizzaSpeziale = (PizzaSpeziale) o;
+    return Objects.equals(this.toppings, pizzaSpeziale.toppings) &&
+        super.equals(o);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(toppings, super.hashCode());
+  }
+
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class PizzaSpeziale {\n");
+    sb.append("    ").append(toIndentedString(super.toString())).append("\n");
+    sb.append("    toppings: ").append(toIndentedString(toppings)).append("\n");
+    sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
+  
+  public static class Builder extends Pizza.Builder {
+
+    private PizzaSpeziale instance;
+
+    public Builder() {
+      this(new PizzaSpeziale());
+    }
+
+    protected Builder(PizzaSpeziale instance) {
+      super(instance); // the parent builder shares the same instance
+      this.instance = instance;
+    }
+
+    protected Builder copyOf(PizzaSpeziale value) { 
+      super.copyOf(value);
+      this.instance.setToppings(value.toppings);
+      return this;
+    }
+
+    public PizzaSpeziale.Builder toppings(String toppings) {
+      this.instance.toppings(toppings);
+      return this;
+    }
+    
+    @Override
+    public PizzaSpeziale.Builder pizzaSize(BigDecimal pizzaSize) {
+      this.instance.pizzaSize(pizzaSize);
+      return this;
+    }
+    
+    @Override
+    public PizzaSpeziale.Builder href(String href) {
+      this.instance.href(href);
+      return this;
+    }
+    
+    @Override
+    public PizzaSpeziale.Builder id(String id) {
+      this.instance.id(id);
+      return this;
+    }
+    
+    @Override
+    public PizzaSpeziale.Builder atSchemaLocation(String atSchemaLocation) {
+      this.instance.atSchemaLocation(atSchemaLocation);
+      return this;
+    }
+    
+    @Override
+    public PizzaSpeziale.Builder atBaseType(String atBaseType) {
+      this.instance.atBaseType(atBaseType);
+      return this;
+    }
+    
+    @Override
+    public PizzaSpeziale.Builder atType(String atType) {
+      this.instance.atType(atType);
+      return this;
+    }
+    
+    /**
+    * returns a built PizzaSpeziale instance.
+    *
+    * The builder is not reusable (NullPointerException)
+    */
+    public PizzaSpeziale build() {
+      try {
+        return this.instance;
+      } finally {
+        // ensure that this.instance is not reused
+        super.build();
+        this.instance = null;
+      }
+    }
+
+    @Override
+    public String toString() {
+      return getClass() + "=(" + instance + ")";
+    }
+  }
+
+  /**
+  * Create a builder with no initialized field (except for the default values).
+  */
+  public static PizzaSpeziale.Builder builder() {
+    return new PizzaSpeziale.Builder();
+  }
+
+  /**
+  * Create a builder with a shallow copy of this instance.
+  */
+  public PizzaSpeziale.Builder toBuilder() {
+    PizzaSpeziale.Builder builder = new PizzaSpeziale.Builder();
+    return builder.copyOf(this);
+  }
+
+}
+

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+server.port=8080
+spring.jackson.date-format=org.openapitools.RFC3339DateFormat
+spring.jackson.serialization.WRITE_DATES_AS_TIMESTAMPS=false

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/main/resources/openapi.yaml

@@ -0,0 +1,264 @@
+openapi: 3.0.1
+info:
+  description: |
+    This tests for a oneOf interface representation
+  title: ByRefOrValue
+  version: 0.0.1
+servers:
+- url: http://localhost:8080
+tags:
+- name: Foo
+- name: Bar
+paths:
+  /foo:
+    get:
+      operationId: getAllFoos
+      responses:
+        "200":
+          $ref: "#/components/responses/200FooArray"
+      summary: GET all Foos
+      tags:
+      - Foo
+      x-accepts:
+      - application/json;charset=utf-8
+      x-tags:
+      - tag: Foo
+    post:
+      operationId: createFoo
+      requestBody:
+        $ref: "#/components/requestBodies/Foo"
+      responses:
+        "201":
+          $ref: "#/components/responses/201Foo"
+      summary: Create a Foo
+      tags:
+      - Foo
+      x-content-type: application/json;charset=utf-8
+      x-accepts:
+      - application/json
+      x-tags:
+      - tag: Foo
+  /bar:
+    post:
+      operationId: createBar
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/Bar_Create"
+        required: true
+      responses:
+        "200":
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Bar"
+          description: Bar created
+      summary: Create a Bar
+      tags:
+      - Bar
+      x-content-type: application/json
+      x-accepts:
+      - application/json
+      x-tags:
+      - tag: Bar
+components:
+  requestBodies:
+    Foo:
+      content:
+        application/json;charset=utf-8:
+          schema:
+            $ref: "#/components/schemas/Foo"
+      description: The Foo to be created
+  responses:
+    "204":
+      content: {}
+      description: Deleted
+    "201Foo":
+      content:
+        application/json:
+          schema:
+            $ref: "#/components/schemas/FooRefOrValue"
+      description: Error
+    "200FooArray":
+      content:
+        application/json;charset=utf-8:
+          schema:
+            items:
+              $ref: "#/components/schemas/FooRefOrValue"
+            type: array
+      description: Success
+  schemas:
+    Addressable:
+      description: Base schema for addressable entities
+      properties:
+        href:
+          description: Hyperlink reference
+          type: string
+        id:
+          description: unique identifier
+          type: string
+      type: object
+    Extensible:
+      properties:
+        '@schemaLocation':
+          description: A URI to a JSON-Schema file that defines additional attributes
+            and relationships
+          type: string
+        '@baseType':
+          description: "When sub-classing, this defines the super-class"
+          type: string
+        '@type':
+          description: "When sub-classing, this defines the sub-class Extensible name"
+          type: string
+      required:
+      - '@type'
+      type: object
+    Entity:
+      allOf:
+      - $ref: "#/components/schemas/Addressable"
+      - $ref: "#/components/schemas/Extensible"
+      discriminator:
+        propertyName: '@type'
+      type: object
+    EntityRef:
+      allOf:
+      - $ref: "#/components/schemas/Addressable"
+      - $ref: "#/components/schemas/Extensible"
+      description: Entity reference schema to be use for all entityRef class.
+      discriminator:
+        propertyName: '@type'
+      properties:
+        name:
+          description: Name of the related entity.
+          type: string
+        '@referredType':
+          description: The actual type of the target instance when needed for disambiguation.
+          type: string
+      type: object
+    FooRefOrValue:
+      discriminator:
+        propertyName: '@type'
+      oneOf:
+      - $ref: "#/components/schemas/Foo"
+      - $ref: "#/components/schemas/FooRef"
+      type: object
+      x-one-of-name: FooRefOrValue
+    Foo:
+      allOf:
+      - $ref: "#/components/schemas/Entity"
+      example:
+        fooPropA: fooPropA
+        fooPropB: fooPropB
+      properties:
+        fooPropA:
+          type: string
+        fooPropB:
+          type: string
+      type: object
+    FooRef:
+      allOf:
+      - $ref: "#/components/schemas/EntityRef"
+      properties:
+        foorefPropA:
+          type: string
+      type: object
+    BarRef:
+      allOf:
+      - $ref: "#/components/schemas/EntityRef"
+      type: object
+    Bar_Create:
+      allOf:
+      - $ref: "#/components/schemas/Entity"
+      properties:
+        barPropA:
+          type: string
+        fooPropB:
+          type: string
+        foo:
+          $ref: "#/components/schemas/FooRefOrValue"
+      type: object
+    Bar:
+      allOf:
+      - $ref: "#/components/schemas/Entity"
+      example:
+        foo:
+          fooPropA: fooPropA
+          fooPropB: fooPropB
+        id: id
+        fooPropB: fooPropB
+        barPropA: barPropA
+      properties:
+        id:
+          type: string
+        barPropA:
+          type: string
+        fooPropB:
+          type: string
+        foo:
+          $ref: "#/components/schemas/FooRefOrValue"
+      required:
+      - id
+      type: object
+    BarRefOrValue:
+      oneOf:
+      - $ref: "#/components/schemas/Bar"
+      - $ref: "#/components/schemas/BarRef"
+      type: object
+      x-one-of-name: BarRefOrValue
+    Pizza:
+      allOf:
+      - $ref: "#/components/schemas/Entity"
+      properties:
+        pizzaSize:
+          type: number
+      type: object
+    Pasta:
+      allOf:
+      - $ref: "#/components/schemas/Entity"
+      properties:
+        vendor:
+          type: string
+      type: object
+    PizzaSpeziale:
+      allOf:
+      - $ref: "#/components/schemas/Pizza"
+      properties:
+        toppings:
+          type: string
+      type: object
+    FruitType:
+      enum:
+      - APPLE
+      - BANANA
+      type: string
+    Fruit:
+      discriminator:
+        mapping:
+          APPLE: "#/components/schemas/Apple"
+          BANANA: "#/components/schemas/Banana"
+        propertyName: fruitType
+      oneOf:
+      - $ref: "#/components/schemas/Apple"
+      - $ref: "#/components/schemas/Banana"
+      properties:
+        fruitType:
+          $ref: "#/components/schemas/FruitType"
+      required:
+      - fruitType
+      type: object
+      x-one-of-name: Fruit
+    Apple:
+      properties:
+        seeds:
+          type: integer
+      required:
+      - seeds
+      type: object
+    Banana:
+      properties:
+        length:
+          type: integer
+      required:
+      - length
+      type: object

samples/openapi3/server/petstore/spring-boot-oneof-sealed/src/test/java/org/openapitools/OpenApiGeneratorApplicationTests.java

@@ -0,0 +1,13 @@
+package org.openapitools;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class OpenApiGeneratorApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}