/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* $Id: ElemChoose.java 468643 2006-10-28 06:56:03Z minchau $
*/
package org.apache.xalan.templates;
import javax.xml.transform.TransformerException;
import org.apache.xalan.res.XSLTErrorResources;
import org.apache.xalan.transformer.TransformerImpl;
import org.apache.xpath.XPathContext;
import org.apache.xpath.objects.XObject;
/**
* 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>
* @xsl.usage advanced
*/
public class ElemChoose extends ElemTemplateElement
{
static final long serialVersionUID = -3070117361903102033L;
/**
* 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.
*
* @throws TransformerException
*/
public void execute(TransformerImpl transformer) throws TransformerException
{
if (transformer.getDebug())
transformer.getTraceManager().fireTraceEvent(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
XPathContext xctxt = transformer.getXPathContext();
int sourceNode = xctxt.getCurrentNode();
// System.err.println("\""+when.getTest().getPatternString()+"\"");
// if(when.getTest().getPatternString().equals("COLLECTION/icuser/ictimezone/LITERAL='GMT +13:00 Pacific/Tongatapu'"))
// System.err.println("Found COLLECTION/icuser/ictimezone/LITERAL");
if (transformer.getDebug())
{
XObject test = when.getTest().execute(xctxt, sourceNode, when);
if (transformer.getDebug())
transformer.getTraceManager().fireSelectedEvent(sourceNode, when,
"test", when.getTest(), test);
if (test.bool())
{
transformer.getTraceManager().fireTraceEvent(when);
transformer.executeChildTemplates(when, true);
transformer.getTraceManager().fireTraceEndEvent(when);
return;
}
}
else if (when.getTest().bool(xctxt, sourceNode, when))
{
transformer.executeChildTemplates(when, true);
return;
}
}
else if (Constants.ELEMNAME_OTHERWISE == type)
{
found = true;
if (transformer.getDebug())
transformer.getTraceManager().fireTraceEvent(childElem);
// xsl:otherwise
transformer.executeChildTemplates(childElem, true);
if (transformer.getDebug())
transformer.getTraceManager().fireTraceEndEvent(childElem);
return;
}
}
if (!found)
transformer.getMsgMgr().error(
this, XSLTErrorResources.ER_CHOOSE_REQUIRES_WHEN);
if (transformer.getDebug())
transformer.getTraceManager().fireTraceEndEvent(this);
}
/**
* 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 ElemTemplateElement appendChild(ElemTemplateElement newChild)
{
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);
}
/**
* Tell if this element can accept variable declarations.
* @return true if the element can accept and process variable declarations.
*/
public boolean canAcceptVariables()
{
return false;
}
}