Package org.springframework.ws.server.endpoint.adapter.method.dom

Source Code of org.springframework.ws.server.endpoint.adapter.method.dom.JDomPayloadMethodProcessor

/*
* Copyright 2005-2012 the original author or authors.
*
* 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 org.springframework.ws.server.endpoint.adapter.method.dom;

import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;

import org.springframework.core.MethodParameter;
import org.springframework.ws.server.endpoint.adapter.method.AbstractPayloadSourceMethodProcessor;

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.input.DOMBuilder;
import org.jdom2.transform.JDOMResult;
import org.jdom2.transform.JDOMSource;
import org.w3c.dom.Node;

/**
* Implementation of {@link org.springframework.ws.server.endpoint.adapter.method.MethodArgumentResolver
* MethodArgumentResolver} and {@link org.springframework.ws.server.endpoint.adapter.method.MethodReturnValueHandler
* MethodReturnValueHandler} that supports JDOM {@linkplain Element elements}.
*
* @author Arjen Poutsma
* @since 2.0
*/
public class JDomPayloadMethodProcessor extends AbstractPayloadSourceMethodProcessor {

    @Override
    protected boolean supportsRequestPayloadParameter(MethodParameter parameter) {
        return supports(parameter);
    }

    @Override
    protected Element resolveRequestPayloadArgument(MethodParameter parameter, Source requestPayload) throws Exception {
        if (requestPayload instanceof DOMSource) {
            Node node = ((DOMSource) requestPayload).getNode();
            DOMBuilder domBuilder = new DOMBuilder();
            if (node.getNodeType() == Node.ELEMENT_NODE) {
                return domBuilder.build((org.w3c.dom.Element) node);
            }
            else if (node.getNodeType() == Node.DOCUMENT_NODE) {
                Document document = domBuilder.build((org.w3c.dom.Document) node);
                return document.getRootElement();
            }
        }
        // we have no other option than to transform
        JDOMResult jdomResult = new JDOMResult();
        transform(requestPayload, jdomResult);
        return jdomResult.getDocument().getRootElement();
    }

    @Override
    protected boolean supportsResponsePayloadReturnType(MethodParameter returnType) {
        return supports(returnType);
    }

    @Override
    protected Source createResponsePayload(MethodParameter returnType, Object returnValue) {
        Element returnedElement = (Element) returnValue;
        return new JDOMSource(returnedElement);
    }

    private boolean supports(MethodParameter parameter) {
        return Element.class.equals(parameter.getParameterType());
    }

}
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