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/*
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* Copyright 2005-2010 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.ws.server.endpoint.mapping.jaxb;
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import java.lang.reflect.Method;
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import javax.xml.bind.JAXBContext;
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import javax.xml.bind.JAXBException;
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import javax.xml.bind.JAXBIntrospector;
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import javax.xml.bind.annotation.XmlRootElement;
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import javax.xml.namespace.QName;
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import org.springframework.core.MethodParameter;
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import org.springframework.ws.context.MessageContext;
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import org.springframework.ws.server.endpoint.mapping.AbstractAnnotationMethodEndpointMapping;
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import org.springframework.ws.server.endpoint.support.PayloadRootUtils;
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import org.springframework.xml.transform.TransformerHelper;
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/**
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* Implementation of the {@link org.springframework.ws.server.EndpointMapping EndpointMapping} interface that uses the
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* JAXB2 {@link XmlRootElement} annotation to map methods to request payload root elements.
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* <p/>
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* Endpoints typically have the following form:
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* <pre>
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* @Endpoint
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* public class MyEndpoint{
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* public void doSomethingWithRequest(@RequestBody MyRootElement rootElement) {
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* ...
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* }
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* }
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* </pre>
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* where MyRootElement is annotated with {@code @XmlRootElement}:
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* <pre>
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* @XmlRootElement(name = "myRoot", namespace = "http://springframework.org/spring-ws")
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* public class MyRootElement {
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* ...
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* }
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* </pre>
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*
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* @author Arjen Poutsma
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* @since 2.0
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*/
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public class XmlRootElementEndpointMapping extends AbstractAnnotationMethodEndpointMapping<QName> {
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private TransformerHelper transformerHelper = new TransformerHelper();
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public void setTransformerHelper(TransformerHelper transformerHelper) {
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this.transformerHelper = transformerHelper;
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}
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@Override
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protected QName getLookupKeyForMethod(Method method) {
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Class<?>[] parameterTypes = method.getParameterTypes();
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for (int i = 0; i < parameterTypes.length; i++) {
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MethodParameter methodParameter = new MethodParameter(method, i);
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Class<?> parameterType = methodParameter.getParameterType();
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if (parameterType.isAnnotationPresent(XmlRootElement.class)) {
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QName result = handleRootElement(parameterType);
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if (result != null) {
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return result;
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}
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}
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}
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return null;
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}
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private QName handleRootElement(Class<?> parameterType) {
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try {
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Object param = parameterType.newInstance();
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QName result = getElementName(parameterType, param);
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if (result != null) {
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return result;
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}
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}
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catch (InstantiationException e) {
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// ignore
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}
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catch (IllegalAccessException ex) {
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// ignore
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}
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return null;
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}
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private QName getElementName(Class<?> parameterType, Object param) {
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try {
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JAXBContext context = JAXBContext.newInstance(parameterType);
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JAXBIntrospector introspector = context.createJAXBIntrospector();
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return introspector.getElementName(param);
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}
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catch (JAXBException ex) {
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return null;
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}
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}
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@Override
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protected QName getLookupKeyForMessage(MessageContext messageContext) throws Exception {
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return PayloadRootUtils.getPayloadRootQName(messageContext.getRequest().getPayloadSource(), transformerHelper);
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}
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}
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Arjen Poutsma