Support models with multi-level hierarchy (via roxspring) (#4503)

* Example of broken multi-level hierarchy

* Support for multiple levels of hierarchy in model objects

* Support for multiple levels of hierarchy in generators

* Regenerated samples

* Temporarily skip scalaz sample verification, which is having issue with Java version in CI container

* Re-enable scalaz in verify samples

Co-authored-by: Rob Oxspring <roxspring@imapmail.org>

samples/client/petstore/go/go-petstore-withXml/README.md

@@ -86,6 +86,8 @@ Class | Method | HTTP request | Description
  - [ArrayOfArrayOfNumberOnly](docs/ArrayOfArrayOfNumberOnly.md)
  - [ArrayOfNumberOnly](docs/ArrayOfNumberOnly.md)
  - [ArrayTest](docs/ArrayTest.md)
+ - [BigCat](docs/BigCat.md)
+ - [BigCatAllOf](docs/BigCatAllOf.md)
  - [Capitalization](docs/Capitalization.md)
  - [Cat](docs/Cat.md)
  - [CatAllOf](docs/CatAllOf.md)

samples/client/petstore/go/go-petstore-withXml/api/openapi.yaml

@@ -1422,6 +1422,10 @@ components:
       allOf:
       - $ref: '#/components/schemas/Animal'
       - $ref: '#/components/schemas/Cat_allOf'
+    BigCat:
+      allOf:
+      - $ref: '#/components/schemas/Cat'
+      - $ref: '#/components/schemas/BigCat_allOf'
     Animal:
       discriminator:
         propertyName: className
@@ -2086,6 +2090,15 @@ components:
       properties:
         declawed:
           type: boolean
+    BigCat_allOf:
+      properties:
+        kind:
+          enum:
+          - lions
+          - tigers
+          - leopards
+          - jaguars
+          type: string
   securitySchemes:
     petstore_auth:
       flows:

samples/client/petstore/go/go-petstore-withXml/docs/BigCat.md

@@ -0,0 +1,14 @@
+# BigCat
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**ClassName** | **string** |  | 
+**Color** | **string** |  | [optional] [default to red]
+**Declawed** | **bool** |  | [optional] 
+**Kind** | **string** |  | [optional] 
+
+[[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/client/petstore/go/go-petstore-withXml/docs/BigCatAllOf.md

@@ -0,0 +1,11 @@
+# BigCatAllOf
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**Kind** | **string** |  | [optional] 
+
+[[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/client/petstore/go/go-petstore-withXml/model_big_cat.go

@@ -0,0 +1,18 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * API version: 1.0.0
+ */
+
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+package petstore
+// BigCat struct for BigCat
+type BigCat struct {
+	ClassName string `json:"className" xml:"className"`
+	Color string `json:"color,omitempty" xml:"color"`
+	Declawed bool `json:"declawed,omitempty" xml:"declawed"`
+	Kind string `json:"kind,omitempty" xml:"kind"`
+}

samples/client/petstore/go/go-petstore-withXml/model_big_cat_all_of.go

@@ -0,0 +1,15 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * API version: 1.0.0
+ */
+
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+package petstore
+// BigCatAllOf struct for BigCatAllOf
+type BigCatAllOf struct {
+	Kind string `json:"kind,omitempty" xml:"kind"`
+}

samples/client/petstore/go/go-petstore/README.md

@@ -86,6 +86,8 @@ Class | Method | HTTP request | Description
  - [ArrayOfArrayOfNumberOnly](docs/ArrayOfArrayOfNumberOnly.md)
  - [ArrayOfNumberOnly](docs/ArrayOfNumberOnly.md)
  - [ArrayTest](docs/ArrayTest.md)
+ - [BigCat](docs/BigCat.md)
+ - [BigCatAllOf](docs/BigCatAllOf.md)
  - [Capitalization](docs/Capitalization.md)
  - [Cat](docs/Cat.md)
  - [CatAllOf](docs/CatAllOf.md)

samples/client/petstore/go/go-petstore/api/openapi.yaml

@@ -1422,6 +1422,10 @@ components:
       allOf:
       - $ref: '#/components/schemas/Animal'
       - $ref: '#/components/schemas/Cat_allOf'
+    BigCat:
+      allOf:
+      - $ref: '#/components/schemas/Cat'
+      - $ref: '#/components/schemas/BigCat_allOf'
     Animal:
       discriminator:
         propertyName: className
@@ -2086,6 +2090,15 @@ components:
       properties:
         declawed:
           type: boolean
+    BigCat_allOf:
+      properties:
+        kind:
+          enum:
+          - lions
+          - tigers
+          - leopards
+          - jaguars
+          type: string
   securitySchemes:
     petstore_auth:
       flows:

samples/client/petstore/go/go-petstore/docs/BigCat.md

@@ -0,0 +1,14 @@
+# BigCat
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**ClassName** | **string** |  | 
+**Color** | **string** |  | [optional] [default to red]
+**Declawed** | **bool** |  | [optional] 
+**Kind** | **string** |  | [optional] 
+
+[[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/client/petstore/go/go-petstore/docs/BigCatAllOf.md

@@ -0,0 +1,11 @@
+# BigCatAllOf
+
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+**Kind** | **string** |  | [optional] 
+
+[[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/client/petstore/go/go-petstore/model_big_cat.go

@@ -0,0 +1,17 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * API version: 1.0.0
+ * Generated by: OpenAPI Generator (https://openapi-generator.tech)
+ */
+
+package petstore
+// BigCat struct for BigCat
+type BigCat struct {
+	ClassName string `json:"className"`
+	Color string `json:"color,omitempty"`
+	Declawed bool `json:"declawed,omitempty"`
+	Kind string `json:"kind,omitempty"`
+}

samples/client/petstore/go/go-petstore/model_big_cat_all_of.go

@@ -0,0 +1,14 @@
+/*
+ * OpenAPI Petstore
+ *
+ * This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: \" \\
+ *
+ * API version: 1.0.0
+ * Generated by: OpenAPI Generator (https://openapi-generator.tech)
+ */
+
+package petstore
+// BigCatAllOf struct for BigCatAllOf
+type BigCatAllOf struct {
+	Kind string `json:"kind,omitempty"`
+}