[all] Move feature set setter (OpenAPITools#5460)

When I originally implemented the feature set code, I added the
getter/setter on DefaultCodegen and CodegenConfig as well as on
GeneratorMetadata. GeneratorMetadata also includes the library variation
features. When I went to add library-specific features, I realized the
discrepancy.

This removes the public setter from DefaultCodegen/CodegenConfig, and
adds a protected modifyFeatureSet which accepts a lambda and hides the
builder logic away in the method.

This will be a breaking change for anyone who's created a custom
generator in 4.2.3, so the impact is very limited.

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

@@ -268,7 +268,7 @@ private void generateMarkdownHelp(StringBuilder sb, CodegenConfig config) {
         if (Boolean.TRUE.equals(featureSets)) {
             sb.append(newline).append("## FEATURE SET").append(newline).append(newline);
 
-            List<FeatureSet.FeatureSetFlattened> flattened = config.getFeatureSet().flatten();
+            List<FeatureSet.FeatureSetFlattened> flattened = config.getGeneratorMetadata().getFeatureSet().flatten();
             flattened.sort(Comparator.comparing(FeatureSet.FeatureSetFlattened::getFeatureCategory));
 
             AtomicReference<String> lastCategory = new AtomicReference<>();
@@ -385,7 +385,7 @@ private void generatePlainTextHelp(StringBuilder sb, CodegenConfig config) {
         if (Boolean.TRUE.equals(featureSets)) {
             sb.append(newline).append("FEATURE SET").append(newline);
 
-            List<FeatureSet.FeatureSetFlattened> flattened = config.getFeatureSet().flatten();
+            List<FeatureSet.FeatureSetFlattened> flattened = config.getGeneratorMetadata().getFeatureSet().flatten();
             flattened.sort(Comparator.comparing(FeatureSet.FeatureSetFlattened::getFeatureCategory));
 
             AtomicReference<String> lastCategory = new AtomicReference<>();

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

@@ -287,8 +287,6 @@ public interface CodegenConfig {
 
     FeatureSet getFeatureSet();
 
-    void setFeatureSet(FeatureSet featureSet);
-
     boolean isRemoveEnumValuePrefix();
 
     void setRemoveEnumValuePrefix(boolean removeEnumValuePrefix);

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

@@ -67,6 +67,7 @@
 import java.io.File;
 import java.util.*;
 import java.util.Map.Entry;
+import java.util.function.Consumer;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
@@ -124,7 +125,6 @@ public class DefaultCodegen implements CodegenConfig {
                 .build();
     }
 
-    protected FeatureSet featureSet;
     protected GeneratorMetadata generatorMetadata;
     protected String inputSpec;
     protected String outputFolder = "";
@@ -1289,10 +1289,9 @@ public DefaultCodegen() {
             codegenType = CodegenType.OTHER;
         }
 
-        featureSet = DefaultFeatureSet;
-
         generatorMetadata = GeneratorMetadata.newBuilder()
                 .stability(Stability.STABLE)
+                .featureSet(DefaultFeatureSet)
                 .generationMessage(String.format(Locale.ROOT, "OpenAPI Generator: %s (%s)", getName(), codegenType.toValue()))
                 .build();
 
@@ -5672,12 +5671,7 @@ public void setStrictSpecBehavior(final boolean strictSpecBehavior) {
 
     @Override
     public FeatureSet getFeatureSet() {
-        return this.featureSet;
-    }
-
-    @Override
-    public void setFeatureSet(final FeatureSet featureSet) {
-        this.featureSet = featureSet == null ? DefaultFeatureSet : featureSet;
+        return this.generatorMetadata.getFeatureSet();
     }
 
     /**
@@ -5742,4 +5736,11 @@ public void addOneOfInterfaceModel(ComposedSchema cs, String type) {
 
     public void addImportsToOneOfInterface(List<Map<String, String>> imports) {}
     //// End of methods related to the "useOneOfInterfaces" feature
+
+    protected void modifyFeatureSet(Consumer<FeatureSet.Builder> processor) {
+        FeatureSet.Builder builder = getFeatureSet().modify();
+        processor.accept(builder);
+        this.generatorMetadata = GeneratorMetadata.newBuilder(generatorMetadata)
+                .featureSet(builder.build()).build();
+    }
 }

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

@@ -101,7 +101,7 @@ public abstract class AbstractJavaCodegen extends DefaultCodegen implements Code
     public AbstractJavaCodegen() {
         super();
 
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(DocumentationFeature.Readme)
                 .wireFormatFeatures(EnumSet.of(WireFormatFeature.JSON, WireFormatFeature.XML))
                 .securityFeatures(EnumSet.noneOf(
@@ -119,7 +119,7 @@ public AbstractJavaCodegen() {
                 .includeClientModificationFeatures(
                         ClientModificationFeature.BasePath
                 )
-                .build();
+        );
 
         supportsInheritance = true;
         modelTemplateFiles.put("model.mustache", ".java");

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

@@ -82,7 +82,7 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
     public AbstractTypeScriptClientCodegen() {
         super();
 
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(DocumentationFeature.Readme)
                 .wireFormatFeatures(EnumSet.of(WireFormatFeature.JSON, WireFormatFeature.XML))
                 .securityFeatures(EnumSet.noneOf(
@@ -100,7 +100,7 @@ public AbstractTypeScriptClientCodegen() {
                 .includeClientModificationFeatures(
                         ClientModificationFeature.BasePath
                 )
-                .build();
+        );
 
         // clear import mapping (from default generator) as TS does not use it
         // at the moment

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

@@ -57,7 +57,7 @@ public void processOpts() {
         super.processOpts();
 
         // TODO: Ada maintainer review.
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .excludeDocumentationFeatures(DocumentationFeature.Readme)
                 .excludeWireFormatFeatures(
                         WireFormatFeature.XML,
@@ -86,7 +86,7 @@ public void processOpts() {
                         ParameterFeature.Cookie
                 )
                 .includeClientModificationFeatures(ClientModificationFeature.BasePath)
-                .build();
+        );
 
         if (additionalProperties.containsKey(CodegenConstants.PACKAGE_NAME)) {
             packageName = (String) additionalProperties.get(CodegenConstants.PACKAGE_NAME);

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

@@ -36,7 +36,7 @@ public AdaServerCodegen() {
         super();
 
         // TODO: Ada maintainer review.
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(DocumentationFeature.Readme)
                 .excludeWireFormatFeatures(
                         WireFormatFeature.XML,
@@ -64,7 +64,7 @@ public AdaServerCodegen() {
                         ParameterFeature.Cookie
                 )
                 .includeClientModificationFeatures(ClientModificationFeature.BasePath)
-                .build();
+        );
     }
 
     @Override

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

@@ -61,7 +61,7 @@ public AndroidClientCodegen() {
         super();
 
         // TODO: Android client maintainer review.
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(DocumentationFeature.Readme)
                 .excludeWireFormatFeatures(
                         WireFormatFeature.PROTOBUF
@@ -87,7 +87,7 @@ public AndroidClientCodegen() {
                         ParameterFeature.Cookie
                 )
                 .includeClientModificationFeatures(ClientModificationFeature.BasePath)
-                .build();
+        );
 
         outputFolder = "generated-code/android";
         modelTemplateFiles.put("model.mustache", ".java");

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/Apache2ConfigCodegen.java

@@ -52,7 +52,7 @@ public Apache2ConfigCodegen() {
         super();
 
         // TODO: Apache2 maintainer review.
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .parameterFeatures(EnumSet.of(ParameterFeature.Path))
                 .securityFeatures(EnumSet.of(SecurityFeature.BasicAuth))
                 .dataTypeFeatures(EnumSet.noneOf(DataTypeFeature.class))
@@ -61,7 +61,7 @@ public Apache2ConfigCodegen() {
                 .globalFeatures(EnumSet.noneOf(GlobalFeature.class))
                 .schemaSupportFeatures(EnumSet.noneOf(SchemaSupportFeature.class))
                 .clientModificationFeatures(EnumSet.noneOf(ClientModificationFeature.class))
-                .build();
+        );
 
         apiTemplateFiles.put("apache-config.mustache", ".conf");
 

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

@@ -187,13 +187,13 @@ public AsciidocDocumentationCodegen() {
         super();
 
         // TODO: Asciidoc maintainer review.
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .securityFeatures(EnumSet.noneOf(SecurityFeature.class))
                 .documentationFeatures(EnumSet.noneOf(DocumentationFeature.class))
                 .globalFeatures(EnumSet.noneOf(GlobalFeature.class))
                 .schemaSupportFeatures(EnumSet.noneOf(SchemaSupportFeature.class))
                 .clientModificationFeatures(EnumSet.noneOf(ClientModificationFeature.class))
-                .build();
+        );
 
         LOGGER.trace("start asciidoc codegen");
 

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

@@ -89,7 +89,7 @@ public AspNetCoreServerCodegen() {
         super();
 
         // TODO: AspnetCore community review
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(DocumentationFeature.Readme)
                 .excludeWireFormatFeatures(WireFormatFeature.PROTOBUF)
                 .includeSecurityFeatures(
@@ -117,7 +117,7 @@ public AspNetCoreServerCodegen() {
                 .includeParameterFeatures(
                         ParameterFeature.Cookie
                 )
-                .build();
+        );
 
         outputFolder = "generated-code" + File.separator + getName();
 

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

@@ -44,7 +44,7 @@ public AvroSchemaCodegen() {
                 .build();
 
         // TODO: Avro maintainer review.
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .parameterFeatures(EnumSet.noneOf(ParameterFeature.class))
                 .securityFeatures(EnumSet.noneOf(SecurityFeature.class))
                 .wireFormatFeatures(EnumSet.noneOf(WireFormatFeature.class))
@@ -55,7 +55,7 @@ public AvroSchemaCodegen() {
                         SchemaSupportFeature.Union
                 )
                 .clientModificationFeatures(EnumSet.noneOf(ClientModificationFeature.class))
-                .build();
+        );
 
         outputFolder = "generated-code/avro-schema";
         modelTemplateFiles.put("model.mustache", ".avsc");

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

@@ -103,7 +103,7 @@ public BashClientCodegen() {
         super();
 
         // TODO: Bash maintainer review
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .documentationFeatures(EnumSet.of(
                         DocumentationFeature.Readme
                 ))
@@ -125,7 +125,7 @@ public BashClientCodegen() {
                         SchemaSupportFeature.Polymorphism,
                         SchemaSupportFeature.Union
                 )
-                .build();
+        );
 
         setReservedWordsLowerCase(
                 Arrays.asList(

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

@@ -53,7 +53,7 @@ public CLibcurlClientCodegen() {
         // TODO: c maintainer review
         // Assumes that C community considers api/model header files as documentation.
         // Generator supports Basic, OAuth, and API key explicitly. Bearer is excluded although clients are able to set headers directly.
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(
                         DocumentationFeature.Readme
                 )
@@ -73,7 +73,7 @@ public CLibcurlClientCodegen() {
                         SchemaSupportFeature.Polymorphism,
                         SchemaSupportFeature.Union
                 )
-                .build();
+        );
 
         modelPackage = "models";
         apiPackage = "api";

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

@@ -80,7 +80,7 @@ public class CSharpClientCodegen extends AbstractCSharpCodegen {
     public CSharpClientCodegen() {
         super();
 
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(DocumentationFeature.Readme)
                 .securityFeatures(EnumSet.of(
                         SecurityFeature.OAuth2_Implicit,
@@ -103,7 +103,7 @@ public CSharpClientCodegen() {
                         ClientModificationFeature.BasePath,
                         ClientModificationFeature.UserAgent
                 )
-                .build();
+        );
 
         supportsInheritance = true;
         modelTemplateFiles.put("model.mustache", ".cs");

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CSharpDotNet2ClientCodegen.java

@@ -41,9 +41,7 @@ public class CSharpDotNet2ClientCodegen extends AbstractCSharpCodegen {
     public CSharpDotNet2ClientCodegen() {
         super();
 
-        featureSet = getFeatureSet().modify()
-                .includeDocumentationFeatures(DocumentationFeature.Readme)
-                .build();
+        modifyFeatureSet(features -> features.includeDocumentationFeatures(DocumentationFeature.Readme));
 
         generatorMetadata = GeneratorMetadata.newBuilder(generatorMetadata)
                 .stability(Stability.DEPRECATED)

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

@@ -69,7 +69,7 @@ public class CSharpNancyFXServerCodegen extends AbstractCSharpCodegen {
     public CSharpNancyFXServerCodegen() {
         super();
 
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .excludeDocumentationFeatures(DocumentationFeature.Readme)
                 .securityFeatures(EnumSet.noneOf(SecurityFeature.class))
                 .excludeGlobalFeatures(
@@ -84,7 +84,7 @@ public CSharpNancyFXServerCodegen() {
                 .excludeParameterFeatures(
                         ParameterFeature.Cookie
                 )
-                .build();
+        );
 
         outputFolder = "generated-code" + File.separator + getName();
         apiTemplateFiles.put("api.mustache", ".cs");

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

@@ -92,7 +92,7 @@ public class CSharpNetCoreClientCodegen extends AbstractCSharpCodegen {
     public CSharpNetCoreClientCodegen() {
         super();
 
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(DocumentationFeature.Readme)
                 .securityFeatures(EnumSet.of(
                         SecurityFeature.OAuth2_Implicit,
@@ -115,7 +115,7 @@ public CSharpNetCoreClientCodegen() {
                         ClientModificationFeature.BasePath,
                         ClientModificationFeature.UserAgent
                 )
-                .build();
+        );
 
         // mapped non-nullable type without ?
         typeMapping = new HashMap<String, String>();

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

@@ -64,7 +64,7 @@ public ClojureClientCodegen() {
         super();
 
         // TODO: Clojure maintainer review
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .excludeDocumentationFeatures(
                         DocumentationFeature.Readme
                 )
@@ -80,7 +80,7 @@ public ClojureClientCodegen() {
                         SchemaSupportFeature.Polymorphism,
                         SchemaSupportFeature.Union
                 )
-                .build();
+        );
 
         outputFolder = "generated-code" + File.separator + "clojure";
         modelTemplateFiles.put("spec.mustache", ".clj");

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

@@ -36,7 +36,7 @@ public ConfluenceWikiCodegen() {
         super();
 
         // TODO: ConfluenceWiki maintainer review
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .documentationFeatures(EnumSet.noneOf(DocumentationFeature.class))
                 .securityFeatures(EnumSet.noneOf(SecurityFeature.class))
                 .excludeParameterFeatures(ParameterFeature.Cookie)
@@ -49,7 +49,7 @@ public ConfluenceWikiCodegen() {
                         SchemaSupportFeature.Polymorphism,
                         SchemaSupportFeature.Union
                 )
-                .build();
+        );
 
         outputFolder = "docs";
         embeddedTemplateDir = templateDir = "confluenceWikiDocs";

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

@@ -69,7 +69,7 @@ public CppPistacheServerCodegen() {
         super();
 
         // TODO: cpp-pistache-server maintainer review
-        featureSet = getFeatureSet().modify()
+        modifyFeatureSet(features -> features
                 .includeDocumentationFeatures(DocumentationFeature.Readme)
                 .securityFeatures(EnumSet.noneOf(SecurityFeature.class))
                 .excludeGlobalFeatures(
@@ -85,7 +85,7 @@ public CppPistacheServerCodegen() {
                 .excludeParameterFeatures(
                         ParameterFeature.Cookie
                 )
-                .build();
+        );
 
         if (StringUtils.isEmpty(modelNamePrefix)) {
             modelNamePrefix = PREFIX;