Java tutorial
//package com.java2s; /* * 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. */ import java.lang.annotation.Annotation; import java.lang.reflect.AnnotatedElement; import java.lang.reflect.Field; import java.security.AccessController; import java.security.PrivilegedAction; import javax.xml.bind.annotation.XmlElement; import javax.xml.bind.annotation.XmlElementRef; import javax.xml.namespace.QName; public class Main { /** * Get the name of the field by looking at the XmlElement annotation. * * @param jaxbClass * @param fieldName * @return * @throws NoSuchFieldException */ private static QName getXmlElementRefOrElementQName(Class<?> jaxbClass, Field field) throws NoSuchFieldException { XmlElementRef xmlElementRef = (XmlElementRef) getAnnotation(field, XmlElementRef.class); if (xmlElementRef != null) { return new QName(xmlElementRef.namespace(), xmlElementRef.name()); } XmlElement xmlElement = (XmlElement) getAnnotation(field, XmlElement.class); // If XmlElement does not exist, default to using the field name if (xmlElement == null || xmlElement.name().equals("##default")) { return new QName("", field.getName()); } return new QName(xmlElement.namespace(), xmlElement.name()); } /** * Get an annotation. This is wrappered to avoid a Java2Security violation. * @param cls Class that contains annotation * @param annotation Class of requrested Annotation * @return annotation or null */ private static <T extends Annotation> T getAnnotation(final AnnotatedElement element, final Class<T> annotation) { return AccessController.doPrivileged(new PrivilegedAction<T>() { public T run() { return element.getAnnotation(annotation); } }); } }