added capability to work with language argument options on generator service.

Author: HugoMario

modules/swagger-codegen/src/main/java/io/swagger/codegen/v3/service/GeneratorUtil.java

@@ -6,6 +6,7 @@
 import io.swagger.codegen.CodegenConfigLoader;
 import io.swagger.codegen.CodegenConstants;
 import io.swagger.codegen.v3.ClientOptInput;
+import io.swagger.codegen.v3.CodegenArgument;
 import io.swagger.codegen.v3.config.CodegenConfigurator;
 import io.swagger.codegen.v3.service.exception.BadRequestException;
 import io.swagger.models.Swagger;
@@ -198,6 +199,7 @@ public static ClientOptInput getClientOptInput(GenerationRequest generationReque
 
         if (isNotEmpty(lang)) {
             configurator.setLang(lang);
+            readCodegenArguments(configurator, options);
         }
         if (isNotEmpty(options.getAuth())) {
             configurator.setAuth(options.getAuth());
@@ -286,4 +288,26 @@ public static ClientOptInput getClientOptInput(GenerationRequest generationReque
         LOGGER.debug("getClientOptInput - end");
         return configurator.toClientOptInput();
     }
+
+    private static void readCodegenArguments(CodegenConfigurator configurator, Options options) {
+        if (options == null) {
+            return;
+        }
+        io.swagger.codegen.v3.CodegenConfig config = io.swagger.codegen.v3.CodegenConfigLoader.forName(configurator.getLang());
+        if (config == null) {
+            return;
+        }
+        final List<CodegenArgument> arguments = config.readLanguageArguments();
+        if (arguments == null || arguments.isEmpty()) {
+            return;
+        }
+        for (CodegenArgument codegenArgument : arguments) {
+            final String value = options.getCodegenArguments().get(codegenArgument.getOption().substring(2));
+            if (value == null) {
+                continue;
+            }
+            codegenArgument.setValue(value);
+        }
+        configurator.setCodegenArguments(arguments);
+    }
 }

modules/swagger-codegen/src/main/java/io/swagger/codegen/v3/service/Options.java

@@ -37,6 +37,8 @@ public class Options {
     private Boolean skipOverride;
     private String outputDir = "";
 
+    private Map<String, String> codegenArguments = new LinkedHashMap<>();
+
     public Options authorizationValue(AuthorizationValue authorizationValue) {
         this.authorizationValue = authorizationValue;
         return this;
@@ -211,6 +213,25 @@ public Options addImportMapping(String key, String value) {
         return this;
     }
 
+    public Options codegenArguments(Map<String, String> codegenArguments) {
+        this.codegenArguments = codegenArguments;
+        return this;
+    }
+
+    public Map<String, String> getCodegenArguments() {
+        return codegenArguments;
+    }
+
+    public void setCodegenArguments(Map<String, String> codegenArguments) {
+        this.codegenArguments = codegenArguments;
+    }
+
+    public Options addCodegenArgument(String key, String value) {
+        this.codegenArguments.put(key, value);
+        return this;
+    }
+
+
     public Options invokerPackage(String invokerPackage) {
         this.invokerPackage = invokerPackage;
         return this;