Non functional Java styling changes

Created by: agilob

PR checklist

• Read the contribution guidelines.
• Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
• Run the following to build the project and update samples:

  ./mvnw clean package 
  ./bin/generate-samples.sh
  ./bin/utils/export_docs_generators.sh

  Commit all changed files. This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master. These must match the expectations made by your contribution. You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*. For Windows users, please run the script in Git BASH.
• File the PR against the correct branch: master (5.3.0), 6.0.x
• If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request.

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

@@ -535,9 +535,7 @@ public class CodegenConfigurator {
             Set<String> warnings = new HashSet<>();
             if (specification != null) {
                 List<String> unusedModels = ModelUtils.getUnusedSchemas(specification);
-                if (unusedModels != null) {
-                    unusedModels.forEach(name -> warnings.add("Unused model: " + name));
-                }
+                unusedModels.forEach(name -> warnings.add("Unused model: " + name));
             }
 
             if (workflowSettings.isValidateSpec()) {

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

@@ -535,9 +535,7 @@ public class CodegenConfigurator {
             Set<String> warnings = new HashSet<>();
             if (specification != null) {
                 List<String> unusedModels = ModelUtils.getUnusedSchemas(specification);
-                if (unusedModels != null) {
-                    unusedModels.forEach(name -> warnings.add("Unused model: " + name));
-                }
+                unusedModels.forEach(name -> warnings.add("Unused model: " + name));
             }
 
             if (workflowSettings.isValidateSpec()) {

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

@@ -165,7 +165,7 @@ public class ExampleGenerator {
                     }
                 } else if (modelName != null && mediaType.startsWith(MIME_TYPE_XML)) {
                     final Schema schema = this.examples.get(modelName);
-                    String example = new XmlExampleGenerator(this.examples).toXml(schema, 0, Collections.<String>emptySet());
+                    String example = new XmlExampleGenerator(this.examples).toXml(schema, 0, Collections.emptySet());
                     if (example != null) {
                         kv.put(EXAMPLE, example);
                         output.add(kv);

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

@@ -44,7 +44,7 @@ public class XmlExampleGenerator {
     }
 
     public String toXml(Schema schema) {
-        return toXml(null, schema, 0, Collections.<String>emptySet());
+        return toXml(null, schema, 0, Collections.emptySet());
     }
 
     protected String toXml(Schema schema, int indent, Collection<String> path) {

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

@@ -41,7 +41,7 @@ public class RootedFileRule extends Rule {
     }
 
     private String getExtensionPart(final String input, int stopIndex) {
-        return input.substring(stopIndex > 0 ? stopIndex+1: input.length(), input.length());
+        return input.substring(stopIndex > 0 ? stopIndex+1: input.length());
     }
 
     @Override

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

@@ -50,7 +50,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
     protected List<Map<String, Object>> orderedModels;
     protected final Map<String, List<String>> modelDepends;
     protected final Map<String, String> nullableTypeMapping;
-    protected final HashMap<String, String> operationsScopes;
+    protected final Map<String, String> operationsScopes;
     protected int scopeIndex = 0;
 
     public AbstractAdaCodegen() {
@@ -155,7 +155,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
                         "xor")
         );
 
-        typeMapping = new HashMap<String, String>();
+        typeMapping = new HashMap<>();
         typeMapping.put("date", "Swagger.Date");
         typeMapping.put("DateTime", "Swagger.Datetime");
         typeMapping.put("string", "Swagger.UString");
@@ -172,7 +172,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
         typeMapping.put("binary", "Swagger.Binary");
 
         // Mapping to convert an Ada required type to an optional type (nullable).
-        nullableTypeMapping = new HashMap<String, String>();
+        nullableTypeMapping = new HashMap<>();
         nullableTypeMapping.put("Swagger.Date", "Swagger.Nullable_Date");
         nullableTypeMapping.put("Swagger.Datetime", "Swagger.Nullable_Date");
         nullableTypeMapping.put("Swagger.UString", "Swagger.Nullable_UString");
@@ -181,10 +181,10 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
         nullableTypeMapping.put("Boolean", "Swagger.Nullable_Boolean");
         nullableTypeMapping.put("Swagger.Object", "Swagger.Object");
 
-        modelDepends = new HashMap<String, List<String>>();
-        orderedModels = new ArrayList<Map<String, Object>>();
-        operationsScopes = new HashMap<String, String>();
-        super.importMapping = new HashMap<String, String>();
+        modelDepends = new HashMap<>();
+        orderedModels = new ArrayList<>();
+        operationsScopes = new HashMap<>();
+        super.importMapping = new HashMap<>();
 
         // CLI options
         addOption(CodegenConstants.PROJECT_NAME, "GNAT project name",
@@ -193,7 +193,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
         modelNameSuffix = "Type";
         embeddedTemplateDir = templateDir = "Ada";
 
-        languageSpecificPrimitives = new HashSet<String>(
+        languageSpecificPrimitives = new HashSet<>(
                 Arrays.asList("integer", "boolean", "number", "long", "float",
                         "double", "object", "string", "date", "DateTime", "binary"));
     }
@@ -651,7 +651,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
             Object v = model.get("model");
             if (v instanceof CodegenModel) {
                 CodegenModel m = (CodegenModel) v;
-                List<String> d = new ArrayList<String>();
+                List<String> d = new ArrayList<>();
                 for (CodegenProperty p : m.vars) {
                     boolean isModel = false;
                     CodegenProperty item = p;
@@ -687,8 +687,8 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
         //     if I find a model that has no dependencies, or all of its dependencies are in revisedOrderedModels, consider it the independentModel
         //   put the independentModel at the end of revisedOrderedModels, and remove it from orderedModels
         //
-        List<Map<String, Object>> revisedOrderedModels = new ArrayList<Map<String, Object>>();
-        List<String> collectedModelNames = new ArrayList<String>();
+        List<Map<String, Object>> revisedOrderedModels = new ArrayList<>();
+        List<String> collectedModelNames = new ArrayList<>();
         int sizeOrderedModels = orderedModels.size();
         for (int i = 0; i < sizeOrderedModels; i++) {
             Map<String, Object> independentModel = null;
@@ -760,7 +760,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
      * @return the authMethods to be used by the operation with its required scopes.
      */
     private List<CodegenSecurity> postProcessAuthMethod(List<CodegenSecurity> authMethods, Map<String, List<String>> scopes) {
-        List<CodegenSecurity> result = (scopes == null) ? null : new ArrayList<CodegenSecurity>();
+        List<CodegenSecurity> result = (scopes == null) ? null : new ArrayList<>();
         if (authMethods != null) {
             for (CodegenSecurity authMethod : authMethods) {
                 if (authMethod.scopes != null) {
@@ -803,7 +803,7 @@ abstract public class AbstractAdaCodegen extends DefaultCodegen implements Codeg
                     opSecurity.isKeyInQuery = authMethod.isKeyInQuery;
                     opSecurity.flow = authMethod.flow;
                     opSecurity.tokenUrl = authMethod.tokenUrl;
-                    List<Map<String, Object>> opAuthScopes = new ArrayList<Map<String, Object>>();
+                    List<Map<String, Object>> opAuthScopes = new ArrayList<>();
                     for (String opScopeName : opScopes) {
                         for (Map<String, Object> scope : authMethod.scopes) {
                             String name = (String) scope.get("scope");

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

@@ -81,9 +81,9 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
     protected boolean supportNullable = Boolean.FALSE;
 
     // nullable type
-    protected Set<String> nullableType = new HashSet<String>();
+    protected Set<String> nullableType = new HashSet<>();
 
-    protected Set<String> valueTypes = new HashSet<String>();
+    protected Set<String> valueTypes = new HashSet<>();
 
     private final Logger LOGGER = LoggerFactory.getLogger(AbstractCSharpCodegen.class);
 
@@ -104,14 +104,14 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
         outputFolder = "generated-code" + File.separator + this.getName();
         embeddedTemplateDir = templateDir = this.getName();
 
-        collectionTypes = new HashSet<String>(
+        collectionTypes = new HashSet<>(
                 Arrays.asList(
                         "IList", "List",
                         "ICollection", "Collection",
                         "IEnumerable")
         );
 
-        mapTypes = new HashSet<String>(
+        mapTypes = new HashSet<>(
                 Arrays.asList("IDictionary")
         );
 
@@ -141,7 +141,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
         );
 
         // TODO: Either include fully qualified names here or handle in DefaultCodegen via lastIndexOf(".") search
-        languageSpecificPrimitives = new HashSet<String>(
+        languageSpecificPrimitives = new HashSet<>(
                 Arrays.asList(
                         "String",
                         "string",
@@ -184,7 +184,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
 
 
         // Nullable types here assume C# 2 support is not part of base
-        typeMapping = new HashMap<String, String>();
+        typeMapping = new HashMap<>();
         typeMapping.put("string", "string");
         typeMapping.put("binary", "byte[]");
         typeMapping.put("ByteArray", "byte[]");
@@ -207,11 +207,11 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
         typeMapping.put("AnyType", "Object");
 
         // nullable type
-        nullableType = new HashSet<String>(
+        nullableType = new HashSet<>(
                 Arrays.asList("decimal", "bool", "int", "float", "long", "double", "DateTime", "DateTimeOffset", "Guid")
         );
         // value Types
-        valueTypes = new HashSet<String>(
+        valueTypes = new HashSet<>(
                 Arrays.asList("decimal", "bool", "int", "float", "long", "double")
         );
     }
@@ -463,9 +463,9 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
      *
      * @param models processed models to be further processed for enum references
      */
-    @SuppressWarnings({"unchecked"})
+    @SuppressWarnings("unchecked")
     private void postProcessEnumRefs(final Map<String, Object> models) {
-        Map<String, CodegenModel> enumRefs = new HashMap<String, CodegenModel>();
+        Map<String, CodegenModel> enumRefs = new HashMap<>();
         for (Map.Entry<String, Object> entry : models.entrySet()) {
             CodegenModel model = ModelUtils.getModelByName(entry.getKey(), models);
             if (model.isEnum) {
@@ -1325,7 +1325,7 @@ public abstract class AbstractCSharpCodegen extends DefaultCodegen implements Co
 
         // only process files with .cs extension
         if ("cs".equals(FilenameUtils.getExtension(file.toString()))) {
-            String command = csharpPostProcessFile + " " + file.toString();
+            String command = csharpPostProcessFile + " " + file;
             try {
                 Process p = Runtime.getRuntime().exec(command);
                 int exitValue = p.waitFor();

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

@@ -323,7 +323,7 @@ abstract public class AbstractCppCodegen extends DefaultCodegen implements Codeg
         }
         // only process files with cpp extension
         if ("cpp".equals(FilenameUtils.getExtension(file.toString())) || "h".equals(FilenameUtils.getExtension(file.toString()))) {
-            String command = cppPostProcessFile + " " + file.toString();
+            String command = cppPostProcessFile + " " + file;
             try {
                 Process p = Runtime.getRuntime().exec(command);
                 p.waitFor();

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

@@ -340,7 +340,7 @@ public abstract class AbstractDartCodegen extends DefaultCodegen {
 
         // replace all characters that have a mapping but ignore underscores
         // append an underscore to each replacement so that it can be camelized
-        if (name.chars().anyMatch(character -> specialCharReplacements.containsKey("" + ((char) character)))) {
+        if (name.chars().anyMatch(character -> specialCharReplacements.containsKey(String.valueOf((char) character)))) {
             name = escape(name, specialCharReplacements, Collections.singletonList("_"), "_");
         }
         // remove the rest
@@ -752,7 +752,7 @@ public abstract class AbstractDartCodegen extends DefaultCodegen {
         // process all files with dart extension
         if ("dart".equals(FilenameUtils.getExtension(file.toString()))) {
             // currently supported is "dartfmt -w" and "dart format"
-            String command = dartPostProcessFile + " " + file.toString();
+            String command = dartPostProcessFile + " " + file;
             try {
                 Process p = Runtime.getRuntime().exec(command);
                 int exitValue = p.waitFor();

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

@@ -53,9 +53,9 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
                 "redefine", "rename", "require", "rescue", "Result", "retry", "select", "separate", "then", "True",
                 "TUPLE", "undefine", "until", "variant", "Void", "when", "xor"));
 
-        defaultIncludes = new HashSet<String>(Arrays.asList("map", "array"));
+        defaultIncludes = new HashSet<>(Arrays.asList("map", "array"));
 
-        languageSpecificPrimitives = new HashSet<String>(
+        languageSpecificPrimitives = new HashSet<>(
                 Arrays.asList("BOOLEAN", "INTEGER_8", "INTEGER_16", "INTEGER_32", "INTEGER_64", "NATURAL_8",
                         "NATURAL_16", "NATURAL_32", "NATURAL_64", "REAL_32", "REAL_64"));
 
@@ -559,7 +559,7 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
     }
 
     public Map<String, String> createMapping(String key, String value) {
-        Map<String, String> customImport = new HashMap<String, String>();
+        Map<String, String> customImport = new HashMap<>();
         customImport.put(key, value);
 
         return customImport;
@@ -592,7 +592,7 @@ public abstract class AbstractEiffelCodegen extends DefaultCodegen implements Co
 
     public String toEiffelFeatureStyle(String operationId) {
         if (operationId.startsWith("get_")) {
-            return operationId.substring(4, operationId.length());
+            return operationId.substring(4);
         } else {
             return operationId;
         }

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

@@ -73,7 +73,7 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
     // true if nullable types will be supported (as option)
     protected boolean supportNullable = Boolean.TRUE;
 
-    protected Set<String> nullableType = new HashSet<String>();
+    protected Set<String> nullableType = new HashSet<>();
 
 
     private final Logger LOGGER = LoggerFactory.getLogger(AbstractFSharpCodegen.class);
@@ -89,9 +89,9 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
         outputFolder = this.getName();
         embeddedTemplateDir = templateDir = this.getName();
 
-        collectionTypes = new HashSet<String>(Arrays.asList("list", "seq"));
+        collectionTypes = new HashSet<>(Arrays.asList("list", "seq"));
 
-        mapTypes = new HashSet<String>(
+        mapTypes = new HashSet<>(
                 Arrays.asList("IDictionary")
         );
 
@@ -114,7 +114,7 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
         );
 
         // TODO - these are based on C# generator, do we need to add any more?
-        languageSpecificPrimitives = new HashSet<String>(
+        languageSpecificPrimitives = new HashSet<>(
                 Arrays.asList(
                         "String",
                         "string",
@@ -156,7 +156,7 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
         instantiationTypes.put("map", "IDictionary");
 
 
-        typeMapping = new HashMap<String, String>();
+        typeMapping = new HashMap<>();
         typeMapping.put("string", "string");
         typeMapping.put("binary", "byte[]");
         typeMapping.put("ByteArray", "byte[]");
@@ -177,7 +177,7 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
         typeMapping.put("URI", "string");
 
         // nullable type
-        nullableType = new HashSet<String>(
+        nullableType = new HashSet<>(
                 Arrays.asList("decimal", "bool", "int", "float", "long", "double", "string", "Guid", "apiKey")
         );
     }
@@ -349,12 +349,12 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
      * Output of CodeGen models must therefore be in dependency order (rather than alphabetical order, which seems to be the default).
      * This could probably be made more efficient if absolutely needed.
      */
-    @SuppressWarnings({"unchecked"})
+    @SuppressWarnings("unchecked")
     public Map<String, Object> postProcessDependencyOrders(final Map<String, Object> objs) {
 
-        Map<String, Set<String>> dependencies = new HashMap<String, Set<String>>();
+        Map<String, Set<String>> dependencies = new HashMap<>();
 
-        List<String> classNames = new ArrayList<String>();
+        List<String> classNames = new ArrayList<>();
 
         for (String k : objs.keySet()) {
             CodegenModel model = ModelUtils.getModelByName(k, objs);
@@ -381,7 +381,7 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
             }
         }
 
-        Map<String, Object> sorted = new LinkedHashMap<String, Object>();
+        Map<String, Object> sorted = new LinkedHashMap<>();
         for (int i = sortedKeys.length - 1; i >= 0; i--) {
             Object k = sortedKeys[i];
             sorted.put(k.toString(), objs.get(k));
@@ -400,9 +400,9 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
      *
      * @param models processed models to be further processed for enum references
      */
-    @SuppressWarnings({"unchecked"})
+    @SuppressWarnings("unchecked")
     private void postProcessEnumRefs(final Map<String, Object> models) {
-        Map<String, CodegenModel> enumRefs = new HashMap<String, CodegenModel>();
+        Map<String, CodegenModel> enumRefs = new HashMap<>();
         for (Map.Entry<String, Object> entry : models.entrySet()) {
             CodegenModel model = ModelUtils.getModelByName(entry.getKey(), models);
             if (model.isEnum) {
@@ -455,10 +455,9 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
                     // Since we iterate enumVars for modelInnerEnum and enumClass templates, and CodegenModel is missing some of CodegenProperty's properties,
                     // we can take advantage of Mustache's contextual lookup to add the same "properties" to the model's enumVars scope rather than CodegenProperty's scope.
                     List<Map<String, String>> enumVars = (ArrayList<Map<String, String>>) model.allowableValues.get("enumVars");
-                    List<Map<String, Object>> newEnumVars = new ArrayList<Map<String, Object>>();
+                    List<Map<String, Object>> newEnumVars = new ArrayList<>();
                     for (Map<String, String> enumVar : enumVars) {
-                        Map<String, Object> mixedVars = new HashMap<String, Object>();
-                        mixedVars.putAll(enumVar);
+                        Map<String, Object> mixedVars = new HashMap<>(enumVar);
 
                         mixedVars.put("isString", isString);
                         mixedVars.put("isLong", isLong);
@@ -473,7 +472,7 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
                     }
                 }
             } else {
-                LOGGER.warn("Expected to retrieve model %s by name, but no model was found. Check your -Dmodels inclusions.", openAPIName);
+                LOGGER.warn("Expected to retrieve model {} by name, but no model was found. Check your -Dmodels inclusions.", openAPIName);
             }
         }
     }
@@ -1115,7 +1114,7 @@ public abstract class AbstractFSharpCodegen extends DefaultCodegen implements Co
 
         // only process files with .fs extension
         if ("fs".equals(FilenameUtils.getExtension(file.toString()))) {
-            String command = fsharpPostProcessFile + " " + file.toString();
+            String command = fsharpPostProcessFile + " " + file;
             try {
                 Process p = Runtime.getRuntime().exec(command);
                 int exitValue = p.waitFor();

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

@@ -56,7 +56,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
         supportsInheritance = true;
         hideGenerationTimestamp = Boolean.FALSE;
 
-        defaultIncludes = new HashSet<String>(
+        defaultIncludes = new HashSet<>(
                 Arrays.asList(
                         "map",
                         "array")
@@ -77,7 +77,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
                 // Added "error" as it's used so frequently that it may as well be a keyword
         );
 
-        languageSpecificPrimitives = new HashSet<String>(
+        languageSpecificPrimitives = new HashSet<>(
                 Arrays.asList(
                         "string",
                         "bool",
@@ -133,14 +133,14 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
         typeMapping.put("object", "map[string]interface{}");
         typeMapping.put("AnyType", "interface{}");
 
-        numberTypes = new HashSet<String>(
+        numberTypes = new HashSet<>(
                 Arrays.asList(
                         "uint", "uint8", "uint16", "uint32", "uint64",
                         "int", "int8", "int16", "int32", "int64",
                         "float32", "float64")
         );
 
-        importMapping = new HashMap<String, String>();
+        importMapping = new HashMap<>();
 
         cliOptions.clear();
         cliOptions.add(new CliOption(CodegenConstants.PACKAGE_NAME, "Go package name (convention: lowercase).")
@@ -252,7 +252,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
         String[] parts = name.split("_");
         String suffix = parts[parts.length - 1];
 
-        Set<String> reservedSuffixes = new HashSet<String>(Arrays.asList(
+        Set<String> reservedSuffixes = new HashSet<>(Arrays.asList(
                 // Test
                 "test",
                 // $GOOS
@@ -699,7 +699,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
     }
 
     public Map<String, String> createMapping(String key, String value) {
-        Map<String, String> customImport = new HashMap<String, String>();
+        Map<String, String> customImport = new HashMap<>();
         customImport.put(key, value);
 
         return customImport;
@@ -813,7 +813,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
         }
 
         // only process the following type (or we can simply rely on the file extension to check if it's a Go file)
-        Set<String> supportedFileType = new HashSet<String>(
+        Set<String> supportedFileType = new HashSet<>(
                 Arrays.asList(
                         "supporting-mustache",
                         "model-test",
@@ -828,7 +828,7 @@ public abstract class AbstractGoCodegen extends DefaultCodegen implements Codege
         if ("go".equals(FilenameUtils.getExtension(file.toString()))) {
             // e.g. "gofmt -w yourcode.go"
             // e.g. "go fmt path/to/your/package"
-            String command = goPostProcessFile + " " + file.toString();
+            String command = goPostProcessFile + " " + file;
             try {
                 Process p = Runtime.getRuntime().exec(command);
                 int exitValue = p.waitFor();

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

@@ -55,13 +55,13 @@ public abstract class AbstractGraphQLCodegen extends DefaultCodegen implements C
                 )
         );
 
-        defaultIncludes = new HashSet<String>(
+        defaultIncludes = new HashSet<>(
                 Arrays.asList(
                         "map",
                         "array")
         );
 
-        languageSpecificPrimitives = new HashSet<String>(
+        languageSpecificPrimitives = new HashSet<>(
                 Arrays.asList(
                         "null",
                         "ID",
@@ -344,7 +344,7 @@ public abstract class AbstractGraphQLCodegen extends DefaultCodegen implements C
     }
 
     public Map<String, String> createMapping(String key, String value) {
-        Map<String, String> customImport = new HashMap<String, String>();
+        Map<String, String> customImport = new HashMap<>();
         customImport.put(key, value);
 
         return customImport;