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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: XmlUtil.java,v $
* $Revision: 1.4 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
package org.openoffice.xmerge.util;
import org.w3c.dom.Node;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
/**
* Class containing static util methods for handling XML trees.
*
* @author smak
*/
public final class XmlUtil {
/**
* Perform a deep clone of certain <code>Node</code> which
* will base on the document <code>Node</code> of the old
* <code>Node</code>.
*
* @param oldNode The <code>Document</code> of this
* <code>Node</code> is used to clone
* the <code>Node</code>
* @param newNode The <code>Node</code> to clone.
*
* @return The cloned <code>Node</code>.
*/
public static Node deepClone(Node oldNode, Node newNode) {
Document docNode = oldNode.getOwnerDocument();
// clone the starting node
Node clonedNode = cloneNode(docNode, newNode);
// then clone the sub-tree recursively
cloneTree(docNode, clonedNode, newNode);
return clonedNode;
}
/**
* Clone the sub-tree under certain given <code>Node</code>
*
* @param docNode The <code>Document</code> used to clone
* the <code>Node</code>.
* @param oldNode The <code>Node</code> to clone.
* @param newNode The destination <code>Node</code>.
*/
private static void cloneTree(Document docNode, Node oldNode, Node newNode) {
NodeList nodeList = newNode.getChildNodes();
int nodeListLen = nodeList.getLength();
for (int i = 0; i < nodeListLen; i++) {
Node newClonedChild = cloneNode(docNode, nodeList.item(i));
if (newClonedChild != null) {
oldNode.appendChild(newClonedChild);
cloneTree(docNode, newClonedChild, nodeList.item(i));
}
}
}
/**
* Clone a <code>Node</code> (either text or element).
*
* @param docNode The <code>Document</code> used to
* clone the <code>Node</code>.
* @param newNode The <code>Node</code> to clone.
*
* @return The cloned <code>Node</code>.
*/
private static Node cloneNode(Document docNode, Node newNode) {
Node clonedNode = null;
// only support text node and element node (will copy the attributes)
switch (newNode.getNodeType()) {
case Node.TEXT_NODE:
String textStr = newNode.getNodeValue();
clonedNode = docNode.createTextNode(textStr);
break;
case Node.ELEMENT_NODE:
Element oldElem = (Element)newNode;
String tagName = newNode.getNodeName();
Element newElem = (docNode.createElement(tagName));
// copy the attributes
NamedNodeMap attrs = oldElem.getAttributes();
for (int i = 0; i < attrs.getLength(); i++) {
newElem.setAttribute(attrs.item(i).getNodeName(),
attrs.item(i).getNodeValue());
}
clonedNode = newElem;
break;
}
return clonedNode;
}
/**
* Returns the name and type of an XML DOM <code>Node</code>.
*
* @param node <code>Node</code> to query.
*
* @return Name and type of XML DOM <code>Node</code>.
*/
public static String getNodeInfo(Node node) {
String str = null;
switch (node.getNodeType()) {
case Node.ELEMENT_NODE:
str = "ELEMENT";
break;
case Node.ATTRIBUTE_NODE:
str = "ATTRIBUTE";
break;
case Node.TEXT_NODE:
str = "TEXT";
break;
case Node.CDATA_SECTION_NODE:
str = "CDATA_SECTION";
break;
case Node.ENTITY_REFERENCE_NODE:
str = "ENTITY_REFERENCE";
break;
case Node.ENTITY_NODE:
str = "ENTITY";
break;
case Node.PROCESSING_INSTRUCTION_NODE:
str = "PROCESSING_INSTRUCTION";
break;
case Node.COMMENT_NODE:
str = "COMMENT";
break;
case Node.DOCUMENT_NODE:
str = "DOCUMENT";
break;
case Node.DOCUMENT_TYPE_NODE:
str = "DOCUMENT_TYPE";
break;
case Node.DOCUMENT_FRAGMENT_NODE:
str = "DOCUMENT_FRAGMENT";
break;
case Node.NOTATION_NODE:
str = "NOTATION";
break;
}
StringBuffer buffer = new StringBuffer("name=\"");
buffer.append(node.getNodeName());
buffer.append("\" type=\"");
buffer.append(str);
buffer.append("\"");
return buffer.toString();
}
}
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