/*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*
* This software is open source.
* See the bottom of this file for the licence.
*/
package org.dom4j.xpath;
import org.dom4j.InvalidXPathException;
import org.dom4j.Node;
import org.dom4j.NodeType;
import org.dom4j.XPathException;
import org.jaxen.*;
import org.jaxen.dom4j.DocumentNavigator;
import org.jaxen.pattern.Pattern;
import org.jaxen.pattern.PatternParser;
import org.jaxen.saxpath.SAXPathException;
import java.util.ArrayList;
/**
* <p>
* <code>XPathPattern</code> is an implementation of Pattern which uses an
* XPath xpath.
* </p>
*
* @author <a href="mailto:jstrachan@apache.org">James Strachan </a>
* @version $Revision: 1.18 $
*/
public class XPathPattern implements org.dom4j.rule.Pattern {
private String text;
private Pattern pattern;
private Context context;
public XPathPattern(Pattern pattern) {
this.pattern = pattern;
this.text = pattern.getText();
this.context = new Context(getContextSupport());
}
public XPathPattern(String text) {
this.text = text;
this.context = new Context(getContextSupport());
try {
this.pattern = PatternParser.parse(text);
} catch (SAXPathException e) {
throw new InvalidXPathException(text, e.getMessage());
} catch (RuntimeException e) {
throw new InvalidXPathException(text);
}
}
public boolean matches(Node node) {
try {
ArrayList<Node> list = new ArrayList<Node>(1);
list.add(node);
context.setNodeSet(list);
return pattern.matches(node, context);
} catch (JaxenException e) {
handleJaxenException(e);
return false;
}
}
public String getText() {
return text;
}
public double getPriority() {
return pattern.getPriority();
}
public org.dom4j.rule.Pattern[] getUnionPatterns() {
Pattern[] patterns = pattern.getUnionPatterns();
if (patterns != null) {
int size = patterns.length;
XPathPattern[] answer = new XPathPattern[size];
for (int i = 0; i < size; i++) {
answer[i] = new XPathPattern(patterns[i]);
}
return answer;
}
return null;
}
public NodeType getMatchType() {
return NodeType.byCode(pattern.getMatchType());
}
public String getMatchesNodeName() {
return pattern.getMatchesNodeName();
}
public void setVariableContext(VariableContext variableContext) {
context.getContextSupport().setVariableContext(variableContext);
}
@Override
public String toString() {
return "[XPathPattern: text: " + text + " Pattern: " + pattern + "]";
}
protected ContextSupport getContextSupport() {
return new ContextSupport(new SimpleNamespaceContext(),
XPathFunctionContext.getInstance(),
new SimpleVariableContext(), DocumentNavigator.getInstance());
}
protected void handleJaxenException(JaxenException exception)
throws XPathException {
throw new XPathException(text, exception);
}
}
/*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 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 name "DOM4J" must not be used to endorse or promote products derived
* from this Software without prior written permission of MetaStuff, Ltd. For
* written permission, please contact dom4j-info@metastuff.com.
*
* 4. Products derived from this Software may not be called "DOM4J" nor may
* "DOM4J" appear in their names without prior written permission of MetaStuff,
* Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
*
* 5. Due credit should be given to the DOM4J Project - http://dom4j.sourceforge.net
*
* THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``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 METASTUFF, LTD. OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*/