add enum name mapping feature to go generators (#17289)

Author: wing328

bin/configs/go-petstore.yaml

@@ -15,4 +15,6 @@ additionalProperties:
   packageName: petstore
   disallowAdditionalPropertiesIfNotPresent: false
   generateInterfaces: true
+enumNameMappings:
+  delivered: SHIPPED
 

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

@@ -750,6 +750,10 @@ public String toEnumDefaultValue(String value, String datatype) {
 
     @Override
     public String toEnumVarName(String name, String datatype) {
+        if (enumNameMapping.containsKey(name)) {
+            return enumNameMapping.get(name);
+        }
+
         if (name.length() == 0) {
             return "EMPTY";
         }
@@ -784,6 +788,10 @@ public String toEnumVarName(String name, String datatype) {
 
     @Override
     public String toEnumName(CodegenProperty property) {
+        if (enumNameMapping.containsKey(property.name)) {
+            return enumNameMapping.get(property.name);
+        }
+
         String enumName = underscore(toModelName(property.name)).toUpperCase(Locale.ROOT);
 
         // remove [] for array or map of enum

samples/openapi3/client/petstore/go/go-petstore/docs/OuterEnum.md

@@ -7,7 +7,7 @@
 
 * `APPROVED` (value: `"approved"`)
 
-* `DELIVERED` (value: `"delivered"`)
+* `SHIPPED` (value: `"delivered"`)
 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)

samples/openapi3/client/petstore/go/go-petstore/docs/OuterEnumDefaultValue.md

@@ -7,7 +7,7 @@
 
 * `APPROVED` (value: `"approved"`)
 
-* `DELIVERED` (value: `"delivered"`)
+* `SHIPPED` (value: `"delivered"`)
 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)