/*
* Copyright 2011 Google Inc.
*
* Licensed 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 com.google.gwt.i18n.server.impl;
import java.lang.annotation.Annotation;
import java.lang.annotation.Inherited;
import java.util.Arrays;
import java.util.LinkedList;
/**
* Reflection-oriented utilities for implementing the Message/etc API.
*/
public class ReflectionUtils {
public static <A extends Annotation> A getAnnotation(Class<?> clazz,
Class<A> annotClass, boolean forceInherit) {
boolean inherited = forceInherit
|| annotClass.isAnnotationPresent(Inherited.class);
LinkedList<Class<?>> workQueue = new LinkedList<Class<?>>();
workQueue.add(clazz);
while (!workQueue.isEmpty()) {
clazz = workQueue.removeFirst();
A result = clazz.getAnnotation(annotClass);
if (result != null || !inherited) {
return result;
}
Class<?> superClass = clazz.getSuperclass();
if (superClass != null) {
workQueue.addLast(superClass);
}
workQueue.addAll(Arrays.asList((Class<?>[]) clazz.getInterfaces()));
}
return null;
}
}