/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999 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 acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xalan" 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 name, without prior written
* permission of the Apache Software Foundation.
*
* 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 and was
* originally based on software copyright (c) 1999, Lotus
* Development Corporation., http://www.lotus.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xalan.templates;
import org.w3c.dom.*;
import org.xml.sax.*;
import org.apache.xpath.*;
import org.apache.xpath.objects.XObject;
import org.apache.xalan.trace.SelectionEvent;
import org.apache.xml.utils.QName;
import org.apache.xalan.res.XSLTErrorResources;
import org.apache.xalan.transformer.TransformerImpl;
import javax.xml.transform.TransformerException;
/**
* <meta name="usage" content="advanced"/>
* Implement xsl:choose.
* <pre>
* <!ELEMENT xsl:choose (xsl:when+, xsl:otherwise?)>
* <!ATTLIST xsl:choose %space-att;>
* </pre>
* @see <a href="http://www.w3.org/TR/xslt#section-Conditional-Processing-with-xsl:choose">XXX in XSLT Specification</a>
*/
public class ElemChoose extends ElemTemplateElement
{
/**
* Get an int constant identifying the type of element.
* @see org.apache.xalan.templates.Constants
*
* @return The token ID for this element
*/
public int getXSLToken()
{
return Constants.ELEMNAME_CHOOSE;
}
/**
* Return the node name.
*
* @return The element's name
*/
public String getNodeName()
{
return Constants.ELEMNAME_CHOOSE_STRING;
}
/**
* Constructor ElemChoose
*
*/
public ElemChoose(){}
/**
* Execute the xsl:choose transformation.
*
*
* @param transformer non-null reference to the the current transform-time state.
* @param sourceNode non-null reference to the <a href="http://www.w3.org/TR/xslt#dt-current-node">current source node</a>.
* @param mode reference, which may be null, to the <a href="http://www.w3.org/TR/xslt#modes">current mode</a>.
*
* @throws TransformerException
*/
public void execute(
TransformerImpl transformer, Node sourceNode, QName mode)
throws TransformerException
{
if (TransformerImpl.S_DEBUG)
transformer.getTraceManager().fireTraceEvent(sourceNode, mode, this);
boolean found = false;
for (ElemTemplateElement childElem = getFirstChildElem();
childElem != null; childElem = childElem.getNextSiblingElem())
{
int type = childElem.getXSLToken();
if (Constants.ELEMNAME_WHEN == type)
{
found = true;
ElemWhen when = (ElemWhen) childElem;
// must be xsl:when
XObject test = when.getTest().execute(transformer.getXPathContext(),
sourceNode, this);
if (TransformerImpl.S_DEBUG)
transformer.getTraceManager().fireSelectedEvent(sourceNode, when,
"test", when.getTest(), test);
if ((null != test) && test.bool())
{
transformer.executeChildTemplates(when, sourceNode, mode, true);
return;
}
}
else if (Constants.ELEMNAME_OTHERWISE == type)
{
found = true;
// xsl:otherwise
transformer.executeChildTemplates(childElem, sourceNode, mode, true);
return;
}
}
if (!found)
transformer.getMsgMgr().error(this,
XSLTErrorResources.ER_CHOOSE_REQUIRES_WHEN);
}
/**
* Add a child to the child list.
*
* @param newChild Child to add to this node's child list
*
* @return The child that was just added to the child list
*
* @throws DOMException
*/
public Node appendChild(Node newChild) throws DOMException
{
int type = ((ElemTemplateElement) newChild).getXSLToken();
switch (type)
{
case Constants.ELEMNAME_WHEN :
case Constants.ELEMNAME_OTHERWISE :
// TODO: Positional checking
break;
default :
error(XSLTErrorResources.ER_CANNOT_ADD,
new Object[]{ newChild.getNodeName(),
this.getNodeName() }); //"Can not add " +((ElemTemplateElement)newChild).m_elemName +
//" to " + this.m_elemName);
}
return super.appendChild(newChild);
}
}