001: /*
002: * $Id: XPathProcessorImpl.java,v 1.2 2002/06/06 15:02:07 valis Exp $
003: *
004: * ===========================================================================
005: *
006: * The JGenerator Software License, Version 1.0
007: *
008: * Copyright (c) 2000 Dmitry Skavish (skavish@usa.net). All rights reserved.
009: *
010: * Redistribution and use in source and binary forms, with or without
011: * modification, are permitted provided that the following conditions are met:
012: *
013: * 1. Redistributions of source code must retain the above copyright
014: * notice, this list of conditions and the following disclaimer.
015: *
016: * 2. Redistributions in binary form must reproduce the above copyright
017: * notice, this list of conditions and the following disclaimer in
018: * the documentation and/or other materials provided with the
019: * distribution.
020: *
021: * 3. The end-user documentation included with the redistribution, if
022: * any, must include the following acknowlegement:
023: * "This product includes software developed by Dmitry Skavish
024: * (skavish@usa.net, http://www.flashgap.com/)."
025: * Alternately, this acknowlegement may appear in the software itself,
026: * if and wherever such third-party acknowlegements normally appear.
027: *
028: * 4. The name "The JGenerator" must not be used to endorse or promote
029: * products derived from this software without prior written permission.
030: * For written permission, please contact skavish@usa.net.
031: *
032: * 5. Products derived from this software may not be called "The JGenerator"
033: * nor may "The JGenerator" appear in their names without prior written
034: * permission of Dmitry Skavish.
035: *
036: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
037: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
038: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
039: * DISCLAIMED. IN NO EVENT SHALL DMITRY SKAVISH OR THE OTHER
040: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
041: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
042: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
043: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
044: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
045: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
046: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
047: * SUCH DAMAGE.
048: *
049: */
050:
051: package org.openlaszlo.iv.flash.xml.jaxen;
052:
053: import org.openlaszlo.iv.flash.xml.XPathProcessor;
054: import java.util.Iterator;
055: import javax.xml.transform.TransformerException;
056: import org.jaxen.JaxenException;
057: import org.jaxen.dom.DOMXPath;
058: import org.w3c.dom.Node;
059:
060: /**
061: * Jaxen XPath processor
062: * <P>
063: * Provides various methods for XPath processing
064: *
065: * @author Andrew Wason
066: */
067: public class XPathProcessorImpl implements XPathProcessor {
068:
069: /**
070: * Evaluates XPath to list of nodes.
071: *
072: * @param path XPath expression
073: * @param node xml node to evaluated on
074: * @return result of xpath execution - Iterator on nodes
075: * @exception TransformerException
076: */
077: public Iterator selectNodeList(String path, Node node)
078: throws TransformerException {
079: try {
080: DOMXPath xpath = new DOMXPath(path);
081: return xpath.selectNodes(node).iterator();
082: } catch (JaxenException e) {
083: throw new TransformerException(e);
084: }
085: }
086:
087: /**
088: * Evaluates XPath to one node.
089: *
090: * @param path XPath expression
091: * @param node xml node to be evaluated on
092: * @return xml node
093: * @exception TransformerException
094: */
095: public Node selectSingleNode(String path, Node node)
096: throws TransformerException {
097: try {
098: DOMXPath xpath = new DOMXPath(path);
099: return (Node) xpath.selectSingleNode(node);
100: } catch (JaxenException e) {
101: throw new TransformerException((Throwable) e);
102: }
103: }
104: }
|