[JAVA] Enumeration comparison in Java using equalsIgnoreCase when String - Fix issue 8084 (#15273)

* fix issue 8084

* add config

* add config

---------

Co-authored-by: Rodrigo Maciel de Almeida <rodrigo.almeida@wefin.com.br>

docs/generators/java-camel.md

@@ -94,6 +94,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |title|server title name or client service name| |OpenAPI Spring|
 |unhandledException|Declare operation methods to throw a generic exception and allow unhandled exceptions (useful for Spring `@ControllerAdvice` directives).| |false|
 |useBeanValidation|Use BeanValidation API annotations| |true|
+|useEnumCaseInsensitive|Use `equalsIgnoreCase` when String for enum comparison| |false|
 |useFeignClientUrl|Whether to generate Feign client with url parameter.| |true|
 |useJakartaEe|whether to use Jakarta EE namespace instead of javax| |false|
 |useOneOfInterfaces|whether to use a java interface to describe a set of oneOf options, where each option is a class that implements the interface| |false|

docs/generators/spring.md

@@ -87,6 +87,7 @@ These options may be applied as additional-properties (cli) or configOptions (pl
 |title|server title name or client service name| |OpenAPI Spring|
 |unhandledException|Declare operation methods to throw a generic exception and allow unhandled exceptions (useful for Spring `@ControllerAdvice` directives).| |false|
 |useBeanValidation|Use BeanValidation API annotations| |true|
+|useEnumCaseInsensitive|Use `equalsIgnoreCase` when String for enum comparison| |false|
 |useFeignClientUrl|Whether to generate Feign client with url parameter.| |true|
 |useJakartaEe|whether to use Jakarta EE namespace instead of javax| |false|
 |useOneOfInterfaces|whether to use a java interface to describe a set of oneOf options, where each option is a class that implements the interface| |false|

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

@@ -112,6 +112,7 @@ public class SpringCodegen extends AbstractJavaCodegen
     public static final String RETURN_SUCCESS_CODE = "returnSuccessCode";
     public static final String UNHANDLED_EXCEPTION_HANDLING = "unhandledException";
     public static final String USE_RESPONSE_ENTITY = "useResponseEntity";
+    public static final String USE_ENUM_CASE_INSENSITIVE = "useEnumCaseInsensitive";
     public static final String USE_SPRING_BOOT3 = "useSpringBoot3";
     public static final String REQUEST_MAPPING_OPTION = "requestMappingMode";
     public static final String USE_REQUEST_MAPPING_ON_CONTROLLER = "useRequestMappingOnController";
@@ -160,6 +161,7 @@ public class SpringCodegen extends AbstractJavaCodegen
     protected boolean useSpringController = false;
     protected boolean useSwaggerUI = true;
     protected boolean useResponseEntity = true;
+    protected boolean useEnumCaseInsensitive = false;
     protected boolean useSpringBoot3 = false;
     protected boolean generatedConstructorWithRequiredArgs = true;
     protected RequestMappingMode requestMappingMode = RequestMappingMode.controller;
@@ -254,6 +256,9 @@ public class SpringCodegen extends AbstractJavaCodegen
                 "Use the `ResponseEntity` type to wrap return values of generated API methods. "
                     + "If disabled, method are annotated using a `@ResponseStatus` annotation, which has the status of the first response declared in the Api definition",
                 useResponseEntity));
+        cliOptions.add(CliOption.newBoolean(USE_ENUM_CASE_INSENSITIVE,
+                "Use `equalsIgnoreCase` when String for enum comparison",
+                useEnumCaseInsensitive));
         cliOptions.add(CliOption.newBoolean(USE_SPRING_BOOT3,
             "Generate code and provide dependencies for use with Spring Boot 3.x. (Use jakarta instead of javax in imports). Enabling this option will also enable `useJakartaEe`.",
             useSpringBoot3));
@@ -501,6 +506,11 @@ public class SpringCodegen extends AbstractJavaCodegen
         writePropertyBack(USE_RESPONSE_ENTITY, useResponseEntity);
         additionalProperties.put("springHttpStatus", new SpringHttpStatusLambda());
 
+        if (additionalProperties.containsKey(USE_ENUM_CASE_INSENSITIVE)) {
+            this.setUseEnumCaseInsensitive(Boolean.parseBoolean(additionalProperties.get(USE_ENUM_CASE_INSENSITIVE).toString()));
+        }
+        writePropertyBack(USE_ENUM_CASE_INSENSITIVE, useEnumCaseInsensitive);
+
         if (additionalProperties.containsKey(USE_SPRING_BOOT3)) {
             this.setUseSpringBoot3(convertPropertyToBoolean(USE_SPRING_BOOT3));
         }
@@ -1060,6 +1070,10 @@ public class SpringCodegen extends AbstractJavaCodegen
         this.useResponseEntity = useResponseEntity;
     }
 
+    public void setUseEnumCaseInsensitive(boolean useEnumCaseInsensitive) {
+        this.useEnumCaseInsensitive = useEnumCaseInsensitive;
+    }
+
     @Override
     public void postProcessModelProperty(CodegenModel model, CodegenProperty property) {
         super.postProcessModelProperty(model, property);

modules/openapi-generator/src/main/resources/Java/modelEnum.mustache

@@ -56,7 +56,7 @@ import com.google.gson.stream.JsonWriter;
 {{/jackson}}
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

modules/openapi-generator/src/main/resources/Java/modelInnerEnum.mustache

@@ -51,7 +51,7 @@
 {{/jackson}}
     public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
       for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-        if (b.value.equals(value)) {
+        if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
           return b;
         }
       }

modules/openapi-generator/src/main/resources/JavaJaxRS/cxf-cdi/enumClass.mustache

@@ -26,7 +26,7 @@
 
     public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{dataType}} value) {
         for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-            if (b.value.equals(value)) {
+            if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
                 return b;
             }
         }

modules/openapi-generator/src/main/resources/JavaJaxRS/cxf-ext/enumClass.mustache

@@ -26,7 +26,7 @@
 
     public static {{datatypeWithEnum}} fromValue({{dataType}} value) {
         for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-            if (b.value.equals(value)) {
+            if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
                 return b;
             }
         }

modules/openapi-generator/src/main/resources/JavaJaxRS/cxf-ext/enumOuterClass.mustache

@@ -38,7 +38,7 @@ import com.fasterxml.jackson.annotation.JsonValue;
 {{/jackson}}
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

modules/openapi-generator/src/main/resources/JavaJaxRS/cxf/enumClass.mustache

@@ -32,7 +32,7 @@
     {{/jackson}}
     public static {{datatypeWithEnum}} fromValue({{dataType}} value) {
         for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-            if (b.value.equals(value)) {
+            if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
                 return b;
             }
         }

modules/openapi-generator/src/main/resources/JavaJaxRS/cxf/enumOuterClass.mustache

@@ -38,7 +38,7 @@ import com.fasterxml.jackson.annotation.JsonValue;
 {{/jackson}}
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

modules/openapi-generator/src/main/resources/JavaJaxRS/enumClass.mustache

@@ -45,7 +45,7 @@
     @JsonCreator
     public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
       for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-        if (b.value.equals(value)) {
+        if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
           return b;
         }
       }

modules/openapi-generator/src/main/resources/JavaJaxRS/enumOuterClass.mustache

@@ -43,7 +43,7 @@ import com.fasterxml.jackson.annotation.JsonCreator;
   @JsonCreator
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

modules/openapi-generator/src/main/resources/JavaJaxRS/modelEnum.mustache

@@ -41,7 +41,7 @@ import com.fasterxml.jackson.annotation.JsonValue;
   @JsonCreator
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

modules/openapi-generator/src/main/resources/JavaJaxRS/spec/enumClass.mustache

@@ -39,7 +39,7 @@
     @JsonCreator
     public static {{datatypeWithEnum}} fromValue({{dataType}} value) {
         for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-            if (b.value.equals(value)) {
+            if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
                 return b;
             }
         }

modules/openapi-generator/src/main/resources/JavaJaxRS/spec/enumOuterClass.mustache

@@ -49,7 +49,7 @@ import com.fasterxml.jackson.annotation.JsonValue;
   @JsonCreator
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

modules/openapi-generator/src/main/resources/JavaPlayFramework/enumClass.mustache

@@ -35,7 +35,7 @@
     @JsonCreator
     public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
       for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-        if (b.value.equals(value)) {
+        if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
           return b;
         }
       }

modules/openapi-generator/src/main/resources/JavaPlayFramework/enumOuterClass.mustache

@@ -33,7 +33,7 @@ import com.fasterxml.jackson.annotation.JsonCreator;
   @JsonCreator
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

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

@@ -41,7 +41,7 @@
     @JsonCreator
     public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
       for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-        if (b.value.equals(value)) {
+        if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
           return b;
         }
       }

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

@@ -42,7 +42,7 @@ public enum {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatyp
   @JsonCreator
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

modules/openapi-generator/src/main/resources/JavaVertXServer/enumOuterClass.mustache

@@ -27,7 +27,7 @@ import com.fasterxml.jackson.annotation.JsonValue;
 
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

modules/openapi-generator/src/main/resources/JavaVertXWebServer/enumOuterClass.mustache

@@ -27,7 +27,7 @@ import com.fasterxml.jackson.annotation.JsonValue;
 
   public static {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
     for ({{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{{datatypeWithEnum}}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-      if (b.value.equals(value)) {
+      if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
         return b;
       }
     }

modules/openapi-generator/src/main/resources/java-micronaut/common/model/modelEnum.mustache

@@ -47,7 +47,7 @@ import com.fasterxml.jackson.annotation.JsonValue;
     {{/jackson}}
     public static {{#datatypeWithEnum}}{{{.}}}{{/datatypeWithEnum}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
         for ({{#datatypeWithEnum}}{{{.}}}{{/datatypeWithEnum}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{#datatypeWithEnum}}{{{.}}}{{/datatypeWithEnum}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-            if (b.value.equals(value)) {
+            if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
                 return b;
             }
         }

modules/openapi-generator/src/main/resources/java-micronaut/common/model/modelInnerEnum.mustache

@@ -46,7 +46,7 @@
     {{/jackson}}
         public static {{#datatypeWithEnum}}{{{.}}}{{/datatypeWithEnum}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} fromValue({{{dataType}}} value) {
             for ({{#datatypeWithEnum}}{{{.}}}{{/datatypeWithEnum}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}} b : {{#datatypeWithEnum}}{{{.}}}{{/datatypeWithEnum}}{{^datatypeWithEnum}}{{{classname}}}{{/datatypeWithEnum}}.values()) {
-                if (b.value.equals(value)) {
+                if (b.value.{{^isString}}equals{{/isString}}{{#isString}}{{#useEnumCaseInsensitive}}equalsIgnoreCase{{/useEnumCaseInsensitive}}{{^useEnumCaseInsensitive}}equals{{/useEnumCaseInsensitive}}{{/isString}}(value)) {
                     return b;
                 }
             }

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

@@ -2608,4 +2608,66 @@ public class SpringCodegenTest {
                 ));
     }
 
+    @Test
+    public void testEnumCaseInsensitive_issue8084() throws IOException {
+        File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
+        output.deleteOnExit();
+
+        final OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/2_0/issue8084.yaml");
+        final SpringCodegen codegen = new SpringCodegen();
+        codegen.setOpenAPI(openAPI);
+        codegen.setOutputDir(output.getAbsolutePath());
+
+        codegen.additionalProperties().put(SpringCodegen.DATE_LIBRARY, "java8-localdatetime");
+        codegen.additionalProperties().put(INTERFACE_ONLY, "true");
+        codegen.additionalProperties().put(USE_RESPONSE_ENTITY, "false");
+        codegen.additionalProperties().put(DELEGATE_PATTERN, "true");
+        codegen.additionalProperties().put(USE_ENUM_CASE_INSENSITIVE, "true");
+
+        ClientOptInput input = new ClientOptInput();
+        input.openAPI(openAPI);
+        input.config(codegen);
+
+        DefaultGenerator generator = new DefaultGenerator();
+
+        Map<String, File> files = generator.opts(input).generate().stream()
+                .collect(Collectors.toMap(File::getName, Function.identity()));
+
+        JavaFileAssert javaFileAssert = JavaFileAssert.assertThat(files.get("EnumTest.java"));
+        javaFileAssert
+                .assertMethod("fromValue")
+                .bodyContainsLines("if (b.value.equalsIgnoreCase(value)) {");
+    }
+
+    @Test
+    public void testEnumCaseSensitive_issue8084() throws IOException {
+        File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
+        output.deleteOnExit();
+
+        final OpenAPI openAPI = TestUtils.parseFlattenSpec("src/test/resources/2_0/issue8084.yaml");
+        final SpringCodegen codegen = new SpringCodegen();
+        codegen.setOpenAPI(openAPI);
+        codegen.setOutputDir(output.getAbsolutePath());
+
+        codegen.additionalProperties().put(SpringCodegen.DATE_LIBRARY, "java8-localdatetime");
+        codegen.additionalProperties().put(INTERFACE_ONLY, "true");
+        codegen.additionalProperties().put(USE_RESPONSE_ENTITY, "false");
+        codegen.additionalProperties().put(DELEGATE_PATTERN, "true");
+        codegen.additionalProperties().put(USE_ENUM_CASE_INSENSITIVE, "false");
+
+        ClientOptInput input = new ClientOptInput();
+        input.openAPI(openAPI);
+        input.config(codegen);
+
+        DefaultGenerator generator = new DefaultGenerator();
+
+        Map<String, File> files = generator.opts(input).generate().stream()
+                .collect(Collectors.toMap(File::getName, Function.identity()));
+
+        JavaFileAssert javaFileAssert = JavaFileAssert.assertThat(files.get("EnumTest.java"));
+        javaFileAssert
+                .assertMethod("fromValue")
+                .bodyContainsLines("if (b.value.equals(value)) {");
+    }
+
 }

modules/openapi-generator/src/test/resources/2_0/issue8084.yaml

@@ -0,0 +1,52 @@
+swagger: '2.0'
+info:
+  description: 'blah'
+  version: 1.0.0
+  title: sample spec
+host: fake.site.com
+tags:
+  - name: Test
+schemes:
+  - https
+paths:
+  /test:
+    post:
+      summary: Post to test
+      description: ''
+      operationId: postToTest
+      consumes:
+        - application/json
+      produces:
+        - application/json
+      parameters:
+        - in: body
+          name: Obj to test
+          schema:
+            $ref: '#/definitions/ObjTest'
+      responses:
+        '201':
+          description: successful operation
+          schema:
+            $ref: '#/definitions/ObjTest'
+definitions:
+  ObjTest:
+    description: A model to return
+    type: object
+    properties:
+      field1:
+        type: integer
+        format: int64
+      field2:
+        type: string
+        pattern: "\\w"
+        x-pattern-message: "Only letters, numbers and underscore"
+      field3:
+        type: string
+        pattern: "\\w"
+  EnumTest:
+    title: An enum to test
+    type: string
+    enum:
+      - ONE
+      - Two
+      - three