/*
* 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: ElemExsltFuncResult.java 468643 2006-10-28 06:56:03Z minchau $
*/
package org.apache.xalan.templates;
import javax.xml.transform.TransformerException;
import org.apache.xalan.transformer.TransformerImpl;
import org.apache.xpath.XPathContext;
import org.apache.xpath.objects.XObject;
/**
* Handles the EXSLT result element within an EXSLT function element.
*/
public class ElemExsltFuncResult extends ElemVariable
{
static final long serialVersionUID = -3478311949388304563L;
/*
* To keep the binary compatibility put those three private global
* variables back, although they are never used in this verison
*/
// A flag indicating whether the return result is set
private boolean m_isResultSet = false;
// The return result
private XObject m_result = null;
// The frame size of the current caller
private int m_callerFrameSize = 0;
/**
* Generate the EXSLT function return value, and assign it to the variable
* index slot assigned for it in ElemExsltFunction compose().
*
*/
public void execute(TransformerImpl transformer) throws TransformerException
{
XPathContext context = transformer.getXPathContext();
if (transformer.getDebug())
transformer.getTraceManager().fireTraceEvent(this);
// Verify that result has not already been set by another result
// element. Recursion is allowed: intermediate results are cleared
// in the owner ElemExsltFunction execute().
if (transformer.currentFuncResultSeen()) {
throw new TransformerException("An EXSLT function cannot set more than one result!");
}
int sourceNode = context.getCurrentNode();
// Set the return value;
XObject var = getValue(transformer, sourceNode);
transformer.popCurrentFuncResult();
transformer.pushCurrentFuncResult(var);
if (transformer.getDebug())
transformer.getTraceManager().fireTraceEndEvent(this);
}
/**
* Get an integer representation of the element type.
*
* @return An integer representation of the element, defined in the
* Constants class.
* @see org.apache.xalan.templates.Constants
*/
public int getXSLToken()
{
return Constants.EXSLT_ELEMNAME_FUNCRESULT;
}
/**
* Return the node name, defined in the
* Constants class.
* @see org.apache.xalan.templates.Constants
* @return The node name
*
*/
public String getNodeName()
{
return Constants.EXSLT_ELEMNAME_FUNCRESULT_STRING;
}
}