fix some inheritance/composition issues and add allOf unit tests

Fix #3629 #3544 #3474 #3636

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

@@ -100,6 +100,7 @@ public class DefaultCodegen {
     protected List<CliOption> cliOptions = new ArrayList<CliOption>();
     protected boolean skipOverwrite;
     protected boolean supportsInheritance;
+    protected boolean supportsMixins;
     protected Map<String, String> supportedLibraries = new LinkedHashMap<String, String>();
     protected String library;
     protected Boolean sortParamsByRequiredFlag = true;
@@ -1233,7 +1234,7 @@ public class DefaultCodegen {
             List<String> required = new ArrayList<String>();
             Map<String, Property> allProperties;
             List<String> allRequired;
-            if (supportsInheritance) {
+            if (supportsInheritance || supportsMixins) {
                 allProperties = new LinkedHashMap<String, Property>();
                 allRequired = new ArrayList<String>();
                 m.allVars = new ArrayList<CodegenProperty>();
@@ -1254,17 +1255,20 @@ public class DefaultCodegen {
                         interfaceModel = allDefinitions.get(_interface.getSimpleRef());
                     }
                     // set first interface with discriminator found as parent
-                    if (parent == null && interfaceModel instanceof ModelImpl && ((ModelImpl) interfaceModel).getDiscriminator() != null) {
+                    if (parent == null
+                            && ((interfaceModel instanceof ModelImpl && ((ModelImpl) interfaceModel).getDiscriminator() != null)
+                            || (interfaceModel instanceof ComposedModel && isDiscriminatorInInterfaceTree((ComposedModel) interfaceModel, allDefinitions)))) {
                         parent = _interface;
                     } else {
                         final String interfaceRef = toModelName(_interface.getSimpleRef());
                         m.interfaces.add(interfaceRef);
                         addImport(m, interfaceRef);
                         if (allDefinitions != null) {
+                            if (!supportsMixins) {
+                                addProperties(properties, required, interfaceModel, allDefinitions);
+                            }
                             if (supportsInheritance) {
                                 addProperties(allProperties, allRequired, interfaceModel, allDefinitions);
-                            } else {
-                                addProperties(properties, required, interfaceModel, allDefinitions);
                             }
                         }
                     }
@@ -1323,6 +1327,30 @@ public class DefaultCodegen {
         return m;
     }
 
+    /**
+     * Recursively look for a discriminator in the interface tree
+     */
+    private boolean isDiscriminatorInInterfaceTree(ComposedModel model, Map<String, Model> allDefinitions) {
+        if (model == null || allDefinitions == null)
+            return false;
+
+        Model child = ((ComposedModel) model).getChild();
+        if (child instanceof ModelImpl && ((ModelImpl) child).getDiscriminator() != null) {
+            return true;
+        }
+        for (RefModel _interface : model.getInterfaces()) {
+            Model interfaceModel = allDefinitions.get(_interface.getSimpleRef());
+            if (interfaceModel instanceof ModelImpl && ((ModelImpl) interfaceModel).getDiscriminator() != null) {
+                return true;
+            }
+            if (interfaceModel instanceof ComposedModel) {
+
+                return isDiscriminatorInInterfaceTree((ComposedModel) interfaceModel, allDefinitions);
+            }
+        }
+        return false;
+    }
+
     protected void addAdditionPropertiesToCodeGenModel(CodegenModel codegenModel, ModelImpl swaggerModel) {
         MapProperty mapProperty = new MapProperty(swaggerModel.getAdditionalProperties());
         addParentContainer(codegenModel, codegenModel.name, mapProperty);

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavascriptClientCodegen.java

@@ -223,6 +223,7 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
             setUseInheritance(Boolean.parseBoolean((String)additionalProperties.get(USE_INHERITANCE)));
         } else {
             supportsInheritance = true;
+            supportsMixins = true;
         }
         if (additionalProperties.containsKey(EMIT_MODEL_METHODS)) {
             setEmitModelMethods(Boolean.parseBoolean((String)additionalProperties.get(EMIT_MODEL_METHODS)));
@@ -386,6 +387,7 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
 
     public void setUseInheritance(boolean useInheritance) {
         this.supportsInheritance = useInheritance;
+        this.supportsMixins = useInheritance;
     }
 
     public void setEmitModelMethods(boolean emitModelMethods) {
@@ -889,7 +891,7 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
             // NOTE: can't use 'mandatory' as it is built from ModelImpl.getRequired(), which sorts names
             // alphabetically and in any case the document order of 'required' and 'properties' can differ.
             List<CodegenProperty> required = new ArrayList<>();
-            List<CodegenProperty> allRequired = supportsInheritance ? new ArrayList<CodegenProperty>() : required;
+            List<CodegenProperty> allRequired = supportsInheritance || supportsMixins ? new ArrayList<CodegenProperty>() : required;
             cm.vendorExtensions.put("x-required", required);
             cm.vendorExtensions.put("x-all-required", allRequired);
 
@@ -903,7 +905,7 @@ public class JavascriptClientCodegen extends DefaultCodegen implements CodegenCo
                 }
             }
 
-            if (supportsInheritance) {
+            if (supportsInheritance || supportsMixins) {
                 for (CodegenProperty var : cm.allVars) {
                     if (Boolean.TRUE.equals(var.required)) {
                         allRequired.add(var);

modules/swagger-codegen/src/test/java/io/swagger/codegen/CodegenTest.java

@@ -1,5 +1,6 @@
 package io.swagger.codegen;
 
+import io.swagger.models.Model;
 import io.swagger.models.Operation;
 import io.swagger.models.Swagger;
 import io.swagger.models.properties.Property;
@@ -187,6 +188,129 @@ public class CodegenTest {
         Assert.assertEquals(op.discriminator, "className");
     }
 
+    @Test(description = "handle simple composition")
+    public void  simpleCompositionTest() {
+        final Swagger swagger = parseAndPrepareSwagger("src/test/resources/2_0/allOfTest.yaml");
+        final DefaultCodegen codegen = new DefaultCodegen();
+        codegen.supportsInheritance = true;
+        final Model model = swagger.getDefinitions().get("SimpleComposition");
+        CodegenModel composed = codegen.fromModel("SimpleComposition", model, swagger.getDefinitions());
+
+        Assert.assertEquals(composed.vars.size(), 3);
+        Assert.assertEquals(composed.vars.get(0).baseName, "modelOneProp");
+        Assert.assertEquals(composed.vars.get(1).baseName, "modelTwoProp");
+        Assert.assertEquals(composed.vars.get(2).baseName, "simpleCompositionProp");
+        Assert.assertNull(composed.parent);
+    }
+
+    @Test(description = "handle multi level composition")
+    public void  multiCompositionTest() {
+        final Swagger swagger = parseAndPrepareSwagger("src/test/resources/2_0/allOfTest.yaml");
+        final DefaultCodegen codegen = new DefaultCodegen();
+        codegen.supportsInheritance = true;
+        final Model model = swagger.getDefinitions().get("CompositionOfSimpleComposition");
+        CodegenModel composed = codegen.fromModel("CompositionOfSimpleComposition", model, swagger.getDefinitions());
+
+        Assert.assertEquals(composed.vars.size(), 5);
+        Assert.assertEquals(composed.vars.get(0).baseName, "modelOneProp");
+        Assert.assertEquals(composed.vars.get(1).baseName, "modelTwoProp");
+        Assert.assertEquals(composed.vars.get(2).baseName, "simpleCompositionProp");
+        Assert.assertEquals(composed.vars.get(3).baseName, "modelThreeProp");
+        Assert.assertEquals(composed.vars.get(4).baseName, "compositionOfSimpleCompositionProp");
+        Assert.assertNull(composed.parent);
+    }
+
+    @Test(description = "handle simple inheritance")
+    public void  simpleInheritanceTest() {
+        final Swagger swagger = parseAndPrepareSwagger("src/test/resources/2_0/allOfTest.yaml");
+        final DefaultCodegen codegen = new DefaultCodegen();
+        codegen.supportsInheritance = true;
+        final Model model = swagger.getDefinitions().get("ChildOfSimpleParent");
+        CodegenModel child = codegen.fromModel("ChildOfSimpleParent", model, swagger.getDefinitions());
+
+        Assert.assertEquals(child.vars.size(), 2);
+        Assert.assertEquals(child.vars.get(0).baseName, "modelOneProp");
+        Assert.assertEquals(child.vars.get(1).baseName, "childOfSimpleParentProp");
+        Assert.assertEquals(child.parent, "SimpleParent");
+    }
+
+    @Test(description = "handle multi level inheritance")
+    public void  multiInheritanceTest() {
+        final Swagger swagger = parseAndPrepareSwagger("src/test/resources/2_0/allOfTest.yaml");
+        final DefaultCodegen codegen = new DefaultCodegen();
+        codegen.supportsInheritance = true;
+        final Model model = swagger.getDefinitions().get("ChildOfChildOfSimpleParent");
+        CodegenModel child = codegen.fromModel("ChildOfChildOfSimpleParent", model, swagger.getDefinitions());
+
+        Assert.assertEquals(child.vars.size(), 1);
+        Assert.assertEquals(child.vars.get(0).baseName, "childOfChildOfSimpleParentProp");
+        Assert.assertEquals(child.parent, "ChildOfSimpleParent");
+    }
+
+    @Test(description = "copy properties in multi level inheritance if supportsInheritance is false")
+    public void  noSupportsInheritanceTest() {
+        final Swagger swagger = parseAndPrepareSwagger("src/test/resources/2_0/allOfTest.yaml");
+        final DefaultCodegen codegen = new DefaultCodegen();
+        final Model model = swagger.getDefinitions().get("ChildOfChildOfSimpleParent");
+        CodegenModel child = codegen.fromModel("ChildOfChildOfSimpleParent", model, swagger.getDefinitions());
+
+        Assert.assertEquals(child.vars.size(), 5);
+        Assert.assertEquals(child.vars.get(0).baseName, "modelOneProp");
+        Assert.assertEquals(child.vars.get(1).baseName, "disc");
+        Assert.assertEquals(child.vars.get(2).baseName, "simpleParentProp");
+        Assert.assertEquals(child.vars.get(3).baseName, "childOfSimpleParentProp");
+        Assert.assertEquals(child.vars.get(4).baseName, "childOfChildOfSimpleParentProp");
+        Assert.assertEquals(child.parent, "ChildOfSimpleParent");
+    }
+
+    @Test(description = "don't copy interfaces properties if supportsMixins is true")
+    public void  supportsMixinsTest() {
+        final Swagger swagger = parseAndPrepareSwagger("src/test/resources/2_0/allOfTest.yaml");
+        final DefaultCodegen codegen = new DefaultCodegen();
+        codegen.supportsInheritance = true;
+        codegen.supportsMixins = true;
+        final Model model = swagger.getDefinitions().get("ChildOfChildOfSimpleParent");
+        CodegenModel child = codegen.fromModel("ChildOfChildOfSimpleParent", model, swagger.getDefinitions());
+
+        Assert.assertEquals(child.vars.size(), 1);
+        Assert.assertEquals(child.vars.get(0).baseName, "childOfChildOfSimpleParentProp");
+        Assert.assertEquals(child.allVars.size(), 5);
+        Assert.assertEquals(child.allVars.get(0).baseName, "modelOneProp");
+        Assert.assertEquals(child.allVars.get(1).baseName, "disc");
+        Assert.assertEquals(child.allVars.get(2).baseName, "simpleParentProp");
+        Assert.assertEquals(child.allVars.get(3).baseName, "childOfSimpleParentProp");
+        Assert.assertEquals(child.allVars.get(4).baseName, "childOfChildOfSimpleParentProp");
+
+        Assert.assertEquals(child.parent, "ChildOfSimpleParent");
+    }
+
+    @Test(description = "handle inheritance from composed model")
+    public void  inheritanceOfComposedModelTest() {
+        final Swagger swagger = parseAndPrepareSwagger("src/test/resources/2_0/allOfTest.yaml");
+        final DefaultCodegen codegen = new DefaultCodegen();
+        codegen.supportsInheritance = true;
+        final Model model = swagger.getDefinitions().get("ChildOfComposedParent");
+        CodegenModel child = codegen.fromModel("ChildOfComposedParent", model, swagger.getDefinitions());
+
+        Assert.assertEquals(child.vars.size(), 1);
+        Assert.assertEquals(child.vars.get(0).baseName, "childOfComposedParentProp");
+        Assert.assertEquals(child.parent, "ComposedParent");
+    }
+
+    @Test(description = "handle multi level inheritance from composed model")
+    public void  multiInheritanceOfComposedModelTest() {
+        final Swagger swagger = parseAndPrepareSwagger("src/test/resources/2_0/allOfTest.yaml");
+        final DefaultCodegen codegen = new DefaultCodegen();
+        codegen.supportsInheritance = true;
+        final Model model = swagger.getDefinitions().get("ChildOfChildOfComposedParent");
+        CodegenModel child = codegen.fromModel("ChildOfChildOfComposedParent", model, swagger.getDefinitions());
+
+        Assert.assertEquals(child.vars.size(), 1);
+        Assert.assertEquals(child.vars.get(0).baseName, "childOfChildOfComposedParentProp");
+        Assert.assertEquals(child.parent, "ChildOfComposedParent");
+    }
+
+
     @Test(description = "use operation consumes and produces")
     public void localConsumesAndProducesTest() {
         final Swagger model = parseAndPrepareSwagger("src/test/resources/2_0/globalConsumesAndProduces.json");

modules/swagger-codegen/src/test/resources/2_0/allOfTest.yaml

@@ -0,0 +1,104 @@
+swagger: '2.0'
+info:
+  version: 0.0.0
+  title: Simple API
+paths:
+  /:
+    get:
+      responses:
+        200:
+          description: OK
+
+definitions:
+
+  ModelOne:
+    type: object
+    properties:
+      modelOneProp:
+        type: string
+
+  ModelTwo:
+    type: object
+    properties:
+      modelTwoProp:
+        type: string
+
+  ModelThree:
+    type: object
+    properties:
+      modelThreeProp:
+        type: string
+
+  SimpleComposition:
+    allOf:
+      - $ref: '#/definitions/ModelOne'
+      - $ref: '#/definitions/ModelTwo'
+      - type: object
+        properties:
+          simpleCompositionProp:
+            type: string
+
+  CompositionOfSimpleComposition:
+      allOf:
+        - $ref: '#/definitions/SimpleComposition'
+        - $ref: '#/definitions/ModelThree'
+        - type: object
+          properties:
+            compositionOfSimpleCompositionProp:
+              type: string
+
+  SimpleParent:
+    type: object
+    discriminator: disc
+    properties:
+      disc:
+        type: string
+      simpleParentProp:
+        type: string
+    required: [disc]
+
+  ChildOfSimpleParent:
+    allOf:
+      - $ref: '#/definitions/ModelOne'
+      - $ref: '#/definitions/SimpleParent'
+      - type: object
+        properties:
+          childOfSimpleParentProp:
+            type: string
+
+  ChildOfChildOfSimpleParent:
+    allOf:
+      - $ref: '#/definitions/ChildOfSimpleParent'
+      - type: object
+        properties:
+          childOfChildOfSimpleParentProp:
+            type: string
+
+  ComposedParent:
+    allOf:
+      - $ref: '#/definitions/ModelOne'
+      - $ref: '#/definitions/ModelTwo'
+      - type: object
+        discriminator: disc
+        properties:
+          disc:
+            type: string
+          composedParentProp:
+            type: string
+        required: [disc]
+
+  ChildOfComposedParent:
+    allOf:
+    - $ref: '#/definitions/ComposedParent'
+    - type: object
+      properties:
+        childOfComposedParentProp:
+          type: string
+
+  ChildOfChildOfComposedParent:
+    allOf:
+      - $ref: '#/definitions/ChildOfComposedParent'
+      - type: object
+        properties:
+          childOfChildOfComposedParentProp:
+            type: string