Issue 4244 - Add x-discriminator-value

modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java

@@ -184,12 +184,18 @@ public Map<String, Object> postProcessAllModels(Map<String, Object> objs) {
             for (String name : allModels.keySet()) {
                 CodegenModel cm = allModels.get(name);
                 CodegenModel parent = allModels.get(cm.parent);
+                // if a discriminator exists on the parent, don't add this child to the inheritance heirarchy
+                // TODO Determine what to do if the parent discriminator name == the grandparent discriminator name
                 while (parent != null) {
                     if (parent.children == null) {
-                        parent.children = new ArrayList<CodegenModel>();
+                       parent.children = new ArrayList<CodegenModel>();
                     }
                     parent.children.add(cm);
-                    parent = allModels.get(parent.parent);
+                    if (parent.discriminator == null) {
+                        parent = allModels.get(parent.parent);
+                    } else {
+                        parent = null;
+                    }
                 }
             }
         }
@@ -1257,6 +1263,18 @@ public CodegenModel fromModel(String name, Model model, Map<String, Model> allDe
                 allProperties = new LinkedHashMap<String, Property>();
                 allRequired = new ArrayList<String>();
                 m.allVars = new ArrayList<CodegenProperty>();
+                int modelImplCnt = 0; // only one inline object allowed in a ComposedModel
+                for (Model innerModel: ((ComposedModel)model).getAllOf()) {
+                    if (innerModel instanceof ModelImpl) {
+                        if (m.discriminator == null) {
+                            m.discriminator = ((ModelImpl) innerModel).getDiscriminator();
+                        }
+                        if (modelImplCnt++ > 1) {
+                            LOGGER.warn("More than one inline schema specified in allOf:. Only the first one is recognized. All others are ignored.");
+                            break; // only one ModelImpl with discriminator allowed in allOf
+                        }
+                    }
+                }
             } else {
                 allProperties = null;
                 allRequired = null;

modules/swagger-codegen/src/main/resources/Java/typeInfoAnnotation.mustache

@@ -1,5 +1,7 @@
 {{#jackson}}
-@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "{{discriminator}}" )
-@JsonSubTypes({ 
-  {{#children}}@JsonSubTypes.Type(value = {{name}}.class, name = "{{name}}"),{{/children}}
-}){{/jackson}}
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "{{discriminator}}", visible = true )
+@JsonSubTypes({
+  {{#children}}
+  @JsonSubTypes.Type(value = {{name}}.class, name = "{{^vendorExtensions.x-discriminator-value}}{{name}}{{/vendorExtensions.x-discriminator-value}}{{#vendorExtensions.x-discriminator-value}}{{{vendorExtensions.x-discriminator-value}}}{{/vendorExtensions.x-discriminator-value}}"),
+  {{/children}}
+}){{/jackson}}

modules/swagger-codegen/src/main/resources/JavaInflector/typeInfoAnnotation.mustache

@@ -0,0 +1,7 @@
+{{#jackson}}
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "{{discriminator}}", visible = true )
+@JsonSubTypes({
+  {{#children}}
+  @JsonSubTypes.Type(value = {{name}}.class, name = "{{^vendorExtensions.x-discriminator-value}}{{name}}{{/vendorExtensions.x-discriminator-value}}{{#vendorExtensions.x-discriminator-value}}{{{vendorExtensions.x-discriminator-value}}}{{/vendorExtensions.x-discriminator-value}}"),
+  {{/children}}
+}){{/jackson}}

modules/swagger-codegen/src/main/resources/JavaJaxRS/typeInfoAnnotation.mustache

@@ -0,0 +1,7 @@
+{{#jackson}}
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "{{discriminator}}", visible = true )
+@JsonSubTypes({
+  {{#children}}
+  @JsonSubTypes.Type(value = {{name}}.class, name = "{{^vendorExtensions.x-discriminator-value}}{{name}}{{/vendorExtensions.x-discriminator-value}}{{#vendorExtensions.x-discriminator-value}}{{{vendorExtensions.x-discriminator-value}}}{{/vendorExtensions.x-discriminator-value}}"),
+  {{/children}}
+}){{/jackson}}

modules/swagger-codegen/src/main/resources/JavaSpring/typeInfoAnnotation.mustache

@@ -0,0 +1,7 @@
+{{#jackson}}
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "{{discriminator}}", visible = true )
+@JsonSubTypes({
+  {{#children}}
+  @JsonSubTypes.Type(value = {{name}}.class, name = "{{^vendorExtensions.x-discriminator-value}}{{name}}{{/vendorExtensions.x-discriminator-value}}{{#vendorExtensions.x-discriminator-value}}{{{vendorExtensions.x-discriminator-value}}}{{/vendorExtensions.x-discriminator-value}}"),
+  {{/children}}
+}){{/jackson}}