feat(dart-dio): correctly handle Map<String, Object>, List<Object> using JsonObject (#4401)

* feat(dart-dio): correctly handle Map<String, Object>, List<Object> using JsonObject

Signed-off-by: Minsu Lee <[email protected]>

* feat(dart-dio): correctly handle Map<String, Object>, List<Object> using JsonObject

Signed-off-by: Minsu Lee <[email protected]>

Author: amondnet

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

@@ -80,6 +80,7 @@ public DartDioClientCodegen() {
 
         importMapping.put("BuiltList", "package:built_collection/built_collection.dart");
         importMapping.put("BuiltMap", "package:built_collection/built_collection.dart");
+        importMapping.put("JsonObject", "package:built_value/json_object.dart");
         importMapping.put("Uint8List", "dart:typed_data");
     }
 
@@ -129,6 +130,13 @@ public String toEnumVarName(String name, String datatype) {
         return name;
     }
 
+    @Override
+    protected void addAdditionPropertiesToCodeGenModel(CodegenModel codegenModel, Schema schema) {
+        //super.addAdditionPropertiesToCodeGenModel(codegenModel, schema);
+        codegenModel.additionalPropertiesType = getSchemaType(ModelUtils.getAdditionalProperties(schema));
+        addImport(codegenModel, codegenModel.additionalPropertiesType);
+    }
+
     @Override
     public void processOpts() {
         if (StringUtils.isEmpty(System.getenv("DART_POST_PROCESS_FILE"))) {
@@ -230,9 +238,16 @@ public void postProcessModelProperty(CodegenModel model, CodegenProperty propert
             //Updates any List properties on a model to a BuiltList. This happens in post processing rather
             //than type mapping as we only want this to apply to models, not every other class.
             if ("List".equals(property.baseType)) {
-                property.setDatatype(property.dataType.replaceAll(property.baseType, "BuiltList"));
+                property.setDatatype(
+                    property.dataType.replaceAll(property.baseType, "BuiltList"));
                 property.setBaseType("BuiltList");
                 model.imports.add("BuiltList");
+                if ("Object".equals(property.items.baseType)) {
+                    property.setDatatype(
+                        property.dataType.replaceAll("Object", "JsonObject"));
+                    property.items.setDatatype("JsonObject");
+                    model.imports.add("JsonObject");
+                }
             }
         }
         if (property.isMapContainer) {
@@ -242,6 +257,11 @@ public void postProcessModelProperty(CodegenModel model, CodegenProperty propert
                 property.setDatatype(property.dataType.replaceAll(property.baseType, "BuiltMap"));
                 property.setBaseType("BuiltMap");
                 model.imports.add("BuiltMap");
+                if ("Object".equals(property.items.baseType)) {
+                    property.setDatatype(property.dataType.replaceAll("Object", "JsonObject"));
+                    property.items.setDatatype("JsonObject");
+                    model.imports.add("JsonObject");
+                }
             }
         }
 

modules/openapi-generator/src/main/resources/dart-dio/serializers.mustache

@@ -2,6 +2,7 @@ library serializers;
 
 import 'package:built_value/serializer.dart';
 import 'package:built_collection/built_collection.dart';
+import 'package:built_value/json_object.dart';
 import 'package:built_value/standard_json_plugin.dart';
 
 {{#models}}{{#model}}import 'package:{{pubName}}/model/{{classFilename}}.dart';
@@ -23,4 +24,4 @@ const FullType(BuiltList, const [const FullType({{classname}})]),
 ).build();
 
 Serializers standardSerializers =
-(serializers.toBuilder()..addPlugin(StandardJsonPlugin())).build();
+(serializers.toBuilder()..addPlugin(StandardJsonPlugin())).build();