package org.xmldb.common.xml.queries.xalan2;
/*
* 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
* promote products derived from this software without prior written
* permission. For written permission, please contact info@xmldb.org.
*
* 5. Products derived from this software may not be called "XML:DB",
* nor may "XML:DB" appear in their name, without prior written
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*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* 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.Node;
import org.w3c.dom.Document;
import org.w3c.dom.traversal.NodeFilter;
import org.apache.xml.utils.PrefixResolver;
import org.apache.xml.utils.PrefixResolverDefault;
import org.apache.xpath.XPathAPI;
import org.xmldb.common.xml.queries.XPathQuery;
import org.xmldb.common.xml.queries.XObject;
/**
* @version $Revision: 1.6 $ $Date: 2003/05/16 16:02:50 $
* @author <a href="http://www.softwarebuero.de">SMB</a>
*/
public final class XPathQueryImpl implements XPathQuery {
//
// Data
//
private String qstring;
private Node rootNode;
private Node namespace;
private NodeFilter filter;
private PrefixResolver prefixResolver;
public XPathQueryImpl() {
}
public void setQString( String qstring ) throws Exception {
this.qstring = qstring;
}
public void setNamespace( Node namespace ) throws Exception {
this.namespace = namespace;
}
public void setNodeFilter( NodeFilter filter ) throws Exception {
this.filter = filter;
}
/**
* Execute the xpath.
*
* @param rootNode The node from which the query should start or null.
* @return The XObject insulating the query result.
*/
public XObject execute( Node rootNode ) throws Exception {
if (rootNode.getNodeType() == Node.DOCUMENT_NODE) {
rootNode = ((Document)rootNode).getDocumentElement ();
}
this.rootNode = rootNode;
prefixResolver = namespace != null ? new PrefixResolverDefault (namespace):
new PrefixResolverDefault (rootNode);
// execute the XPath query on the specified root node
org.apache.xpath.objects.XObject xobj =
XPathAPI.eval (rootNode, qstring, prefixResolver);
// seems that the
// if (xobj.getType() == org.apache.xpath.objects.XObject.CLASS_NODESET) {
// ((org.w3c.dom.NodeList)xobj.nodeset()).getLength();
// }
return new XObjectImpl (xobj);
}
}