Add mapping features to Julia generators (#16370)

* add mapping features to julia generators

* additional changes required for mapped names (#16383)

---------

Co-authored-by: Tanmay Mohapatra <tanmaykm@gmail.com>

Author: wing328

bin/configs/julia-client-petstore-new.yaml

@@ -1,9 +1,13 @@
 generatorName: julia-client
 outputDir: samples/client/petstore/julia
-inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/julia/petstore.yaml
 templateDir: modules/openapi-generator/src/main/resources/julia-client
 additionalProperties:
   hideGenerationTimestamp: "true"
   packageName: OpenAPIGenPetStoreClient
   exportOperations: "true"
-  exportModels: "true"
+  exportModels: "true"
+modelNameMappings:
+  another_model: MappedModel
+nameMappings:
+  another_property: mappedProperty 

bin/configs/julia-server-petstore-new.yaml

@@ -1,9 +1,9 @@
 generatorName: julia-server
 outputDir: samples/server/petstore/julia
-inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
+inputSpec: modules/openapi-generator/src/test/resources/3_0/julia/petstore.yaml
 templateDir: modules/openapi-generator/src/main/resources/julia-server
 additionalProperties:
   hideGenerationTimestamp: "true"
   packageName: OpenAPIGenPetStoreServer
   exportOperations: "true"
-  exportModels: "true"
+  exportModels: "true"

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

@@ -209,6 +209,11 @@ public String toModelFilename(String name) {
         return "model_" + toModelName(name);
     }
 
+    @Override
+    public String toModelDocFilename(String name) {
+        return toModelName(name);
+    }
+
     @Override
     public String toApiFilename(String name) {
         name = name.replaceAll("-", "_");
@@ -226,6 +231,12 @@ public String toApiName(String name) {
 
     @Override
     public String toParamName(String name) {
+        // obtain the name from parameterNameMapping directly if provided
+        if (parameterNameMapping.containsKey(name)) {
+            return parameterNameMapping.get(name);
+        }
+
+        name = toVarName(name);
         CamelizeOption camelizeOption = CamelizeOption.UPPERCASE_FIRST_CHAR;
         name = camelize(sanitizeName(name), camelizeOption);
         name = CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, name);
@@ -242,7 +253,13 @@ public String toApiVarName(String name) {
 
     @Override
     public String toVarName(String name) {
+        // obtain the name from nameMapping directly if provided
+        if (nameMapping.containsKey(name)) {
+            return nameMapping.get(name);
+        }
+
         return name;
+
     }
 
     /**
@@ -288,6 +305,11 @@ protected boolean needsVarEscape(String name) {
      */
     @Override
     public String toModelName(final String name) {
+        // obtain the name from modelNameMapping directly if provided
+        if (modelNameMapping.containsKey(name)) {
+            return modelNameMapping.get(name);
+        }
+
         String result = sanitizeName(name);
 
         // remove dollar sign