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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://oss.oracle.com/licenses/CDDL+GPL-1.1
 * or LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
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 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.xml.ws.message;

import com.sun.xml.bind.api.Bridge;
import com.sun.xml.bind.unmarshaller.DOMScanner;
import com.sun.xml.ws.streaming.DOMStreamReader;
import com.sun.xml.ws.util.DOMUtil;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.ContentHandler;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;

import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPHeader;
import javax.xml.soap.SOAPMessage;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import javax.xml.stream.XMLStreamWriter;

/**
 * {@link com.sun.xml.ws.api.message.Header} implementation for a DOM.
 *
 * @author Kohsuke Kawaguchi
 */
public class DOMHeader extends AbstractHeaderImpl {
    protected final N node;

    private final String nsUri;
    private final String localName;

    public DOMHeader(N node) {
        assert node!=null;
        this.node = node;

        this.nsUri = fixNull(node.getNamespaceURI());
        this.localName = node.getLocalName();
    }


    public String getNamespaceURI() {
        return nsUri;
    }

    public String getLocalPart() {
        return localName;
    }

    public XMLStreamReader readHeader() throws XMLStreamException {
        DOMStreamReader r = new DOMStreamReader(node);
        r.nextTag();    // move ahead to the start tag
        return r;
    }

    public  T readAsJAXB(Unmarshaller unmarshaller) throws JAXBException {
        return (T) unmarshaller.unmarshal(node);
    }
    /** @deprecated */
    public  T readAsJAXB(Bridge bridge) throws JAXBException {
        return bridge.unmarshal(node);
    }

    public void writeTo(XMLStreamWriter w) throws XMLStreamException {
        DOMUtil.serializeNode(node, w);
    }

    private static String fixNull(String s) {
        if(s!=null)     return s;
        else            return "";
    }

    public void writeTo(ContentHandler contentHandler, ErrorHandler errorHandler) throws SAXException {
        DOMScanner ds = new DOMScanner();
        ds.setContentHandler(contentHandler);
        ds.scan(node);
    }

    public String getAttribute(String nsUri, String localName) {
        if(nsUri.length()==0)   nsUri=null; // DOM wants null, not "".
        return node.getAttributeNS(nsUri,localName);
    }

    public void writeTo(SOAPMessage saaj) throws SOAPException {
        SOAPHeader header = saaj.getSOAPHeader();
        if(header == null)
            header = saaj.getSOAPPart().getEnvelope().addHeader();
        Node clone = header.getOwnerDocument().importNode(node,true);
        header.appendChild(clone);
    }

    @Override
    public String getStringContent() {
        return node.getTextContent();
    }
    
    public N getWrappedNode() {
        return node;
    }


    @Override
    public int hashCode() {
        return getWrappedNode().hashCode();
    }


    @Override
    public boolean equals(Object obj) {
        if (obj instanceof DOMHeader) {
            return getWrappedNode().equals(((DOMHeader) obj).getWrappedNode());
        } else {
            return false;
        }
    }
    
    
}