[normalizer] fix schemas incorrectly skipped

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

@@ -499,7 +499,7 @@ public Schema normalizeSchema(Schema schema, Set<Schema> visitedSchemas) {
         }
 
         if (StringUtils.isNotEmpty(schema.get$ref())) {
-            // not need to process $ref
+            // no need to process $ref
             return schema;
         }
 
@@ -594,7 +594,7 @@ private void normalizeProperties(Map<String, Schema> properties, Set<Schema> vis
         }
         for (Map.Entry<String, Schema> propertiesEntry : properties.entrySet()) {
             Schema property = propertiesEntry.getValue();
-            Schema newProperty = normalizeSchema(property, visitedSchemas);
+            Schema newProperty = normalizeSchema(property, new HashSet<>());
             propertiesEntry.setValue(newProperty);
         }
     }

modules/openapi-generator/src/test/resources/3_1/java/petstore.yaml

@@ -914,3 +914,33 @@ components:
           description: A list of "good output" node IDs in the prompt.
           items:
             type: string
+    circular_reference_1:
+      type: object
+      properties:
+        prop1:
+          $ref: '#/components/schemas/circular_reference_2'
+    circular_reference_2:
+      type: object
+      properties:
+        prop1:
+          $ref: '#/components/schemas/circular_reference_3'
+    circular_reference_3:
+      type: object
+      properties:
+        prop1:
+          $ref: '#/components/schemas/circular_reference_1'
+    array_of_same_ref:
+      type: object
+      properties:
+        arrayFooOne:
+          type: array
+          items:
+            $ref: '#/components/schemas/Tag'
+        arrayFooTwo:
+          type: array
+          items:
+            $ref: '#/components/schemas/Tag'
+        arrayFooThree:
+          type: array
+          items:
+            $ref: '#/components/schemas/Tag'

samples/client/petstore/java/okhttp-gson-3.1/.openapi-generator/FILES

@@ -8,8 +8,12 @@ build.sbt
 docs/Animal.md
 docs/AnyOfArray.md
 docs/AnyTypeTest.md
+docs/ArrayOfSameRef.md
 docs/Cat.md
 docs/Category.md
+docs/CircularReference1.md
+docs/CircularReference2.md
+docs/CircularReference3.md
 docs/Dog.md
 docs/FakeApi.md
 docs/ModelApiResponse.md
@@ -60,8 +64,12 @@ src/main/java/org/openapitools/client/model/AbstractOpenApiSchema.java
 src/main/java/org/openapitools/client/model/Animal.java
 src/main/java/org/openapitools/client/model/AnyOfArray.java
 src/main/java/org/openapitools/client/model/AnyTypeTest.java
+src/main/java/org/openapitools/client/model/ArrayOfSameRef.java
 src/main/java/org/openapitools/client/model/Cat.java
 src/main/java/org/openapitools/client/model/Category.java
+src/main/java/org/openapitools/client/model/CircularReference1.java
+src/main/java/org/openapitools/client/model/CircularReference2.java
+src/main/java/org/openapitools/client/model/CircularReference3.java
 src/main/java/org/openapitools/client/model/Dog.java
 src/main/java/org/openapitools/client/model/ModelApiResponse.java
 src/main/java/org/openapitools/client/model/OneOfStringOrInt.java

samples/client/petstore/java/okhttp-gson-3.1/README.md

@@ -146,8 +146,12 @@ Class | Method | HTTP request | Description
  - [Animal](docs/Animal.md)
  - [AnyOfArray](docs/AnyOfArray.md)
  - [AnyTypeTest](docs/AnyTypeTest.md)
+ - [ArrayOfSameRef](docs/ArrayOfSameRef.md)
  - [Cat](docs/Cat.md)
  - [Category](docs/Category.md)
+ - [CircularReference1](docs/CircularReference1.md)
+ - [CircularReference2](docs/CircularReference2.md)
+ - [CircularReference3](docs/CircularReference3.md)
  - [Dog](docs/Dog.md)
  - [ModelApiResponse](docs/ModelApiResponse.md)
  - [OneOfStringOrInt](docs/OneOfStringOrInt.md)

samples/client/petstore/java/okhttp-gson-3.1/api/openapi.yaml

@@ -1015,6 +1015,32 @@ components:
       maxItems: 5
       minItems: 3
       type: array
+    circular_reference_1:
+      properties:
+        prop1:
+          $ref: '#/components/schemas/circular_reference_2'
+    circular_reference_2:
+      properties:
+        prop1:
+          $ref: '#/components/schemas/circular_reference_3'
+    circular_reference_3:
+      properties:
+        prop1:
+          $ref: '#/components/schemas/circular_reference_1'
+    array_of_same_ref:
+      properties:
+        arrayFooOne:
+          items:
+            $ref: '#/components/schemas/Tag'
+          type: array
+        arrayFooTwo:
+          items:
+            $ref: '#/components/schemas/Tag'
+          type: array
+        arrayFooThree:
+          items:
+            $ref: '#/components/schemas/Tag'
+          type: array
     updatePetWithForm_request:
       properties:
         name:

samples/client/petstore/java/okhttp-gson-3.1/docs/ArrayOfSameRef.md

@@ -0,0 +1,15 @@
+
+
+# ArrayOfSameRef
+
+
+## Properties
+
+| Name | Type | Description | Notes |
+|------------ | ------------- | ------------- | -------------|
+|**arrayFooOne** | [**List<Tag>**](Tag.md) |  |  [optional] |
+|**arrayFooTwo** | [**List<Tag>**](Tag.md) |  |  [optional] |
+|**arrayFooThree** | [**List<Tag>**](Tag.md) |  |  [optional] |
+
+
+

samples/client/petstore/java/okhttp-gson-3.1/docs/CircularReference1.md

@@ -0,0 +1,13 @@
+
+
+# CircularReference1
+
+
+## Properties
+
+| Name | Type | Description | Notes |
+|------------ | ------------- | ------------- | -------------|
+|**prop1** | [**CircularReference2**](CircularReference2.md) |  |  [optional] |
+
+
+

samples/client/petstore/java/okhttp-gson-3.1/docs/CircularReference2.md

@@ -0,0 +1,13 @@
+
+
+# CircularReference2
+
+
+## Properties
+
+| Name | Type | Description | Notes |
+|------------ | ------------- | ------------- | -------------|
+|**prop1** | [**CircularReference3**](CircularReference3.md) |  |  [optional] |
+
+
+

samples/client/petstore/java/okhttp-gson-3.1/docs/CircularReference3.md

@@ -0,0 +1,13 @@
+
+
+# CircularReference3
+
+
+## Properties
+
+| Name | Type | Description | Notes |
+|------------ | ------------- | ------------- | -------------|
+|**prop1** | [**CircularReference1**](CircularReference1.md) |  |  [optional] |
+
+
+

samples/client/petstore/java/okhttp-gson-3.1/src/main/java/org/openapitools/client/JSON.java

@@ -131,8 +131,12 @@ private static Class getClassByDiscriminator(Map classByDiscriminatorValue, Stri
         gsonBuilder.registerTypeAdapter(byte[].class, byteArrayAdapter);
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.AnyOfArray.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.AnyTypeTest.CustomTypeAdapterFactory());
+        gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.ArrayOfSameRef.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.Cat.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.Category.CustomTypeAdapterFactory());
+        gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.CircularReference1.CustomTypeAdapterFactory());
+        gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.CircularReference2.CustomTypeAdapterFactory());
+        gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.CircularReference3.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.Dog.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.ModelApiResponse.CustomTypeAdapterFactory());
         gsonBuilder.registerTypeAdapterFactory(new org.openapitools.client.model.OneOfStringOrInt.CustomTypeAdapterFactory());