Apache CXF example source code file (OverlayW3CDOMStreamWriter.java)

This example Apache CXF source code file (OverlayW3CDOMStreamWriter.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Apache CXF tags/keywords

dom, element, linkedlist, list, node, node, overlayw3cdomstreamwriter, overlayw3cdomstreamwriter, override, string, string, util, w3cdomstreamwriter, xmlstreamexception, xmlstreamexception

The Apache CXF OverlayW3CDOMStreamWriter.java source code

/**
 * 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.
 */
package org.apache.cxf.staxutils;


import java.util.LinkedList;
import java.util.List;

import javax.xml.stream.XMLStreamException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

import org.apache.cxf.common.util.StringUtils;


/**
 * Special StreamWriter that will "overlay" any write events onto the DOM.
 * If the startElement ends up writing an element that already exists at that
 * location, it will just walk into it instead of creating a new element
 */
public class OverlayW3CDOMStreamWriter extends W3CDOMStreamWriter {

    List<Boolean> isOverlaidStack = new LinkedList();
    boolean isOverlaid = true;
    
    public OverlayW3CDOMStreamWriter(Document document) {
        super(document);
    }

    public OverlayW3CDOMStreamWriter(Element e) {
        super(e);
    }
    
    @Override
    public void writeEndElement() throws XMLStreamException {
        isOverlaid = isOverlaidStack.remove(0);
        super.writeEndElement();
    }
    public void writeStartElement(String local) throws XMLStreamException {
        isOverlaidStack.add(0, isOverlaid);
        if (isOverlaid) {
            Element nd = getCurrentNode();
            Node nd2 = null;
            if (nd == null) {
                nd2 = getDocument().getDocumentElement();
            } else {
                nd2 = nd.getFirstChild();
            }
            while (nd2 != null) {
                if (nd2.getNodeType() == Node.ELEMENT_NODE 
                    && local.equals(nd2.getLocalName())
                    && StringUtils.isEmpty(nd2.getNamespaceURI())) {
                    setChild((Element)nd2, false);
                    return;
                }
                nd2 = nd2.getNextSibling();
            }
        }
        isOverlaid = false;
        super.writeStartElement(local);
    }

    public void writeStartElement(String namespace, String local) throws XMLStreamException {
        isOverlaidStack.add(0, isOverlaid);
        if (isOverlaid) {
            Element nd = getCurrentNode();
            Node nd2 = null;
            if (nd == null) {
                nd2 = getDocument().getDocumentElement();
            } else {
                nd2 = nd.getFirstChild();
            }
            while (nd2 != null) {
                if (nd2.getNodeType() == Node.ELEMENT_NODE 
                    && local.equals(nd2.getLocalName())
                    && namespace.equals(nd2.getNamespaceURI())) {
                    setChild((Element)nd2, false);
                    return;
                }
                nd2 = nd2.getNextSibling();
            }
        }
        isOverlaid = false;
        super.writeStartElement(namespace, local);
    }

    public void writeStartElement(String prefix, String local, String namespace) throws XMLStreamException {
        if (prefix == null || prefix.equals("")) {
            writeStartElement(namespace, local);
        } else {
            isOverlaidStack.add(0, isOverlaid);
            if (isOverlaid) {
    
                Element nd = getCurrentNode();
                Node nd2 = null;
                if (nd == null) {
                    nd2 = getDocument().getDocumentElement();
                } else {
                    nd2 = nd.getFirstChild();
                }
                
                while (nd2 != null) {
                    if (nd2.getNodeType() == Node.ELEMENT_NODE 
                        && local.equals(nd2.getLocalName())
                        && namespace.equals(nd2.getNamespaceURI())) {
                        setChild((Element)nd2, false);
                        return;
                    }
                    nd2 = nd2.getNextSibling();
                }
            }
            isOverlaid = false;
            super.writeStartElement(prefix, local, namespace);
        }
    }
    
}