/*
* $Header: /home/cvs/jakarta-commons-sandbox/jelly/src/java/org/apache/commons/jelly/tags/xml/ExprTag.java,v 1.8 2002/05/20 10:09:28 jstrachan Exp $
* $Revision: 1.8 $
* $Date: 2002/05/20 10:09:28 $
*
* ====================================================================
*
* 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: ExprTag.java,v 1.8 2002/05/20 10:09:28 jstrachan Exp $
*/
package org.apache.commons.jelly.tags.xml;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.jelly.JellyContext;
import org.apache.commons.jelly.MissingAttributeException;
import org.apache.commons.jelly.TagSupport;
import org.apache.commons.jelly.XMLOutput;
import org.dom4j.Node;
import org.dom4j.io.SAXWriter;
import org.jaxen.XPath;
/** A tag which performs a copy-of operation like the XSLT tag
*
* @author James Strachan
*/
public class CopyOfTag extends XPathTagSupport {
/** The XPath expression to evaluate. */
private XPath select;
public CopyOfTag() {
}
// Tag interface
//-------------------------------------------------------------------------
public void doTag(XMLOutput output) throws Exception {
Object xpathContext = getXPathContext();
if (select == null) {
throw new MissingAttributeException( "select" );
}
SAXWriter saxWriter = new SAXWriter(output, output);
List nodes = select.selectNodes(xpathContext);
for (Iterator iter = nodes.iterator(); iter.hasNext(); ) {
Object object = iter.next();
if ( object instanceof Node ) {
saxWriter.write( (Node) object );
}
else if (object != null ) {
output.write( object.toString() );
}
}
}
// Properties
//-------------------------------------------------------------------------
/** Sets the XPath expression to evaluate. */
public void setSelect(XPath select) {
this.select = select;
}
}