add getActualInstanceRecursively (#6636)

Author: wing328

modules/openapi-generator/src/main/resources/Java/libraries/jersey2/AbstractOpenApiSchema.mustache

@@ -52,6 +52,25 @@ public abstract class AbstractOpenApiSchema {
      */
     public void setActualInstance(Object instance) {this.instance = instance;}
 
+    /**
+     * Get the instant recursively when the schemas defined in oneOf/anyof happen to be oneOf/anyOf schema as well
+     *
+     * @return an instance of the actual schema/object
+     */
+    public Object getActualInstanceRecursively() {
+        return getActualInstanceRecursively(this);
+    }
+
+    private Object getActualInstanceRecursively(AbstractOpenApiSchema object) {
+        if (object.getActualInstance() == null) {
+            return null;
+        } else if (object.getActualInstance() instanceof AbstractOpenApiSchema) {
+            return getActualInstanceRecursively((AbstractOpenApiSchema)object.getActualInstance());
+        } else {
+            return object.getActualInstance();
+        }
+    }
+
     /**
      * Get the schema type (e.g. anyOf, oneOf)
      *

samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/AbstractOpenApiSchema.java

@@ -63,6 +63,25 @@ public AbstractOpenApiSchema(String schemaType, Boolean isNullable) {
      */
     public void setActualInstance(Object instance) {this.instance = instance;}
 
+    /**
+     * Get the instant recursively when the schemas defined in oneOf/anyof happen to be oneOf/anyOf schema as well
+     *
+     * @return an instance of the actual schema/object
+     */
+    public Object getActualInstanceRecursively() {
+        return getActualInstanceRecursively(this);
+    }
+
+    private Object getActualInstanceRecursively(AbstractOpenApiSchema object) {
+        if (object.getActualInstance() == null) {
+            return null;
+        } else if (object.getActualInstance() instanceof AbstractOpenApiSchema) {
+            return getActualInstanceRecursively((AbstractOpenApiSchema)object.getActualInstance());
+        } else {
+            return object.getActualInstance();
+        }
+    }
+
     /**
      * Get the schema type (e.g. anyOf, oneOf)
      *

samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/model/AbstractOpenApiSchema.java

@@ -63,6 +63,25 @@ public AbstractOpenApiSchema(String schemaType, Boolean isNullable) {
      */
     public void setActualInstance(Object instance) {this.instance = instance;}
 
+    /**
+     * Get the instant recursively when the schemas defined in oneOf/anyof happen to be oneOf/anyOf schema as well
+     *
+     * @return an instance of the actual schema/object
+     */
+    public Object getActualInstanceRecursively() {
+        return getActualInstanceRecursively(this);
+    }
+
+    private Object getActualInstanceRecursively(AbstractOpenApiSchema object) {
+        if (object.getActualInstance() == null) {
+            return null;
+        } else if (object.getActualInstance() instanceof AbstractOpenApiSchema) {
+            return getActualInstanceRecursively((AbstractOpenApiSchema)object.getActualInstance());
+        } else {
+            return object.getActualInstance();
+        }
+    }
+
     /**
      * Get the schema type (e.g. anyOf, oneOf)
      *

samples/openapi3/client/petstore/java/jersey2-java8/src/test/java/org/openapitools/client/model/MammalTest.java

@@ -45,12 +45,29 @@ public void testMammal() throws Exception {
         Zebra z = new Zebra();
         z.setType(Zebra.TypeEnum.MOUNTAIN);
         z.setClassName("zebra");
-
         m.setActualInstance(z);
-
         Assert.assertEquals(JSON.getDefault().getMapper().writeValueAsString(m), "{\"type\":\"mountain\",\"className\":\"zebra\"}");
     }
 
+    /**
+     * Model tests for getActualInstanceRecursively
+     */
+    @Test
+    public void testGetActualInstanceRecursively() throws Exception {
+        Mammal m = new Mammal();
+        Pig p = new Pig();
+        DanishPig dp = new DanishPig();
+        dp.setClassName("danish_pig");
+        p.setActualInstance(dp);
+        m.setActualInstance(p);
+        Assert.assertTrue(m.getActualInstanceRecursively() instanceof DanishPig);
+
+        Pig p2 = new Pig();
+        m.setActualInstance(p2);
+        Assert.assertEquals(m.getActualInstanceRecursively(), null);
+
+    }
+
     /**
      * Test the property 'hasBaleen'
      */