/*
* $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/xml/XMLTagLibrary.java,v 1.6 2002/05/17 18:04:00 jstrachan Exp $
* $Revision: 1.6 $
* $Date: 2002/05/17 18:04:00 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 The Apache Software Foundation. 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 acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* 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,
* 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* $Id: XMLTagLibrary.java,v 1.6 2002/05/17 18:04:00 jstrachan Exp $
*/
package org.apache.commons.jelly.tags.jsl;
import java.io.IOException;
import java.io.Writer;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.jelly.JellyContext;
import org.apache.commons.jelly.JellyException;
import org.apache.commons.jelly.Script;
import org.apache.commons.jelly.expression.Expression;
import org.apache.commons.jelly.expression.ExpressionFactory;
import org.apache.commons.jelly.tags.xml.ExprTag;
import org.apache.commons.jelly.tags.xml.XMLTagLibrary;
import org.apache.commons.jelly.tags.xml.XPathExpression;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.dom4j.DocumentHelper;
import org.dom4j.rule.Pattern;
import org.jaxen.JaxenException;
import org.jaxen.XPath;
import org.jaxen.dom4j.Dom4jXPath;
/** Describes the Taglib. This class could be generated by XDoclet
*
* @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
* @version $Revision: 1.6 $
*/
public class JSLTagLibrary extends XMLTagLibrary {
/** The Log to which logging calls will be made. */
private Log log = LogFactory.getLog(JSLTagLibrary.class);
public JSLTagLibrary() {
registerTag("stylesheet", StylesheetTag.class);
registerTag("style", StyleTag.class);
registerTag("template", TemplateTag.class);
registerTag("applyTemplates", ApplyTemplatesTag.class);
registerTag("valueOf", ExprTag.class);
}
public Expression createExpression(
ExpressionFactory factory,
String tagName,
String attributeName,
String attributeValue) throws Exception {
// #### may need to include some namespace URI information in the XPath instance?
if (attributeName.equals("select")) {
if ( log.isDebugEnabled() ) {
log.debug( "Parsing XPath expression: " + attributeValue );
}
try {
XPath xpath = new Dom4jXPath(attributeValue);
return new XPathExpression(xpath);
}
catch (JaxenException e) {
throw new JellyException( "Could not parse XPath expression: \"" + attributeValue + "\" reason: " + e, e );
}
}
if (attributeName.equals("match")) {
if ( log.isDebugEnabled() ) {
log.debug( "Parsing XPath pattern: " + attributeValue );
}
try {
Pattern pattern = DocumentHelper.createPattern( attributeValue );
return new XPathPatternExpression(pattern);
}
catch (Exception e) {
throw new JellyException( "Could not parse XPath expression: \"" + attributeValue + "\" reason: " + e, e );
}
}
// will use the default expression instead
return super.createExpression(factory, tagName, attributeName, attributeValue);
}
}