QPID-6246 : @ManagedAnnotation should only be applied to interfaces which extend ManagedInterface and should not be inherited

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1641910 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 99 insertions, 0 deletions

diff --git a/qpid/java/broker-codegen/src/main/java/org/apache/qpid/server/model/validation/ManagedAnnotationValidator.java b/qpid/java/broker-codegen/src/main/java/org/apache/qpid/server/model/validation/ManagedAnnotationValidator.java
new file mode 100644
index 0000000000..b38866147b
--- /dev/null
+++ b/qpid/java/broker-codegen/src/main/java/org/apache/qpid/server/model/validation/ManagedAnnotationValidator.java
@@ -0,0 +1,98 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+package org.apache.qpid.server.model.validation;
+
+import java.util.Set;
+
+import javax.annotation.processing.AbstractProcessor;
+import javax.annotation.processing.RoundEnvironment;
+import javax.annotation.processing.SupportedAnnotationTypes;
+import javax.lang.model.SourceVersion;
+import javax.lang.model.element.Element;
+import javax.lang.model.element.ElementKind;
+import javax.lang.model.element.TypeElement;
+import javax.lang.model.type.TypeMirror;
+import javax.lang.model.util.Elements;
+import javax.lang.model.util.Types;
+import javax.tools.Diagnostic;
+
+@SupportedAnnotationTypes(ManagedAnnotationValidator.MANAGED_ANNOTATION_CLASS_NAME)
+public class ManagedAnnotationValidator extends AbstractProcessor
+{
+    public static final String MANAGED_ANNOTATION_CLASS_NAME = "org.apache.qpid.server.model.ManagedAnnotation";
+
+
+    @Override
+    public SourceVersion getSupportedSourceVersion()
+    {
+        return SourceVersion.latest();
+    }
+
+
+    @Override
+    public boolean process(final Set<? extends TypeElement> annotations, final RoundEnvironment roundEnv)
+    {
+        Elements elementUtils = processingEnv.getElementUtils();
+        Types typeUtils = processingEnv.getTypeUtils();
+
+        TypeElement annotationElement = elementUtils.getTypeElement(MANAGED_ANNOTATION_CLASS_NAME);
+
+        String className = "org.apache.qpid.server.model.ManagedInterface";
+        TypeMirror configuredObjectType = getErasure(className);
+
+        for (Element e : roundEnv.getElementsAnnotatedWith(annotationElement))
+        {
+            if (e.getKind() != ElementKind.INTERFACE)
+            {
+                processingEnv.getMessager()
+                        .printMessage(Diagnostic.Kind.ERROR,
+                                      "@"
+                                      + annotationElement.getSimpleName()
+                                      + " can only be applied to an interface",
+                                      e
+                                     );
+            }
+
+
+            if(!typeUtils.isAssignable(typeUtils.erasure(e.asType()), configuredObjectType))
+            {
+
+                processingEnv.getMessager()
+                        .printMessage(Diagnostic.Kind.ERROR,
+                                      "@"
+                                      + annotationElement.getSimpleName()
+                                      + " can only be applied to an interface which extends " + className,
+                                      e
+                                     );
+            }
+        }
+
+        return false;
+    }
+
+
+    private TypeMirror getErasure(final String className)
+    {
+        final Types typeUtils = processingEnv.getTypeUtils();
+        final Elements elementUtils = processingEnv.getElementUtils();
+        return typeUtils.erasure(elementUtils.getTypeElement(className).asType());
+    }
+}
diff --git a/qpid/java/broker-codegen/src/main/resources/META-INF/services/javax.annotation.processing.Processor b/qpid/java/broker-codegen/src/main/resources/META-INF/services/javax.annotation.processing.Processor
index 64440bb999..7f88042433 100644
--- a/qpid/java/broker-codegen/src/main/resources/META-INF/services/javax.annotation.processing.Processor
+++ b/qpid/java/broker-codegen/src/main/resources/META-INF/services/javax.annotation.processing.Processor
@@ -22,3 +22,4 @@ org.apache.qpid.server.plugin.PluggableProcessor
 org.apache.qpid.server.model.ConfiguredObjectRegistrationGenerator
 org.apache.qpid.server.model.validation.AttributeAnnotationValidator
 org.apache.qpid.server.model.validation.AttributeFieldValidation
+org.apache.qpid.server.model.validation.ManagedAnnotationValidator