package org.xmldb.xupdate.lexus.commands;
/*
* The XML:DB Initiative Software License, Version 1.0
*
*
* Copyright (c) 2000-2003 The XML:DB Initiative. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* XML:DB Initiative (http://www.xmldb.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The name "XML:DB Initiative" must not be used to endorse or
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* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the XML:DB Initiative. For more information
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*/
import org.w3c.dom.Attr;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xmldb.common.xml.queries.XObject;
import org.xmldb.common.xml.queries.XPathQuery;
import org.xmldb.common.xml.queries.XPathQueryFactory;
/**
*
* @version $Id: InsertVariable.java,v 1.6 2003/05/21 08:17:38 jbreedveld Exp $
* @author <a href="http://www.smb-tec.com">SMB</a>
*/
public class InsertVariable extends InsertStates {
/**
*
*/
public InsertVariable() {
super();
}
/**
*
*/
public Node execute(Node contextNode) throws Exception {
String selection = (String) attributes.get("select");
NodeList newNodes = null;
if (selection.charAt(0) == '$') {
String name = selection.substring(1);
newNodes = CommandConstants.tempTree.getTreeForName(name);
} else {
newNodes = selectNewNodes(selection, contextNode);
}
Node result = contextNode;
int newNodesLength = newNodes.getLength();
for (int i = 0; i < newNodesLength; i++) {
Node current = newNodes.item(i);
switch (current.getNodeType()) {
case Node.ATTRIBUTE_NODE:
switch (contextNode.getNodeType()) {
case Node.ELEMENT_NODE:
Attr attribute = (Attr) current.cloneNode(true);
((Element) contextNode).setAttributeNode(attribute);
result = attribute;
break;
default:
throw new Exception("can't append attribute !");
}
break;
default:
result = contextNode.appendChild(current.cloneNode(true));
}
}
return result;
}
/**
*
*/
protected NodeList selectNewNodes(String query, Node contextNode) throws Exception {
XPathQuery xpath = XPathQueryFactory.newInstance().newXPathQuery();
xpath.setQString(query);
XObject xResult = xpath.execute(contextNode);
if (xResult.getType() != XObject.CLASS_NODESET) {
throw new Exception("XPath leads not to a Node or NodeList !");
}
NodeList result = xResult.nodeset();
return result;
}
}