/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999-2003 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 javax.xml.transform.TransformerException;
import org.apache.xalan.transformer.TransformerImpl;
import org.apache.xpath.VariableStack;
import org.apache.xpath.objects.XObject;
/**
* <meta name="usage" content="advanced"/>
* Implement xsl:param.
* <pre>
* <!ELEMENT xsl:param %template;>
* <!ATTLIST xsl:param
* name %qname; #REQUIRED
* select %expr; #IMPLIED
* >
* </pre>
* @see <a href="http://www.w3.org/TR/xslt#variables">variables in XSLT Specification</a>
*/
public class ElemParam extends ElemVariable
{
int m_qnameID;
/**
* Constructor ElemParam
*
*/
public ElemParam(){}
/**
* Get an int constant identifying the type of element.
* @see org.apache.xalan.templates.Constants
*
* @return The token ID of the element
*/
public int getXSLToken()
{
return Constants.ELEMNAME_PARAMVARIABLE;
}
/**
* Return the node name.
*
* @return The element's name
*/
public String getNodeName()
{
return Constants.ELEMNAME_PARAMVARIABLE_STRING;
}
/**
* Copy constructor.
*
* @param param Element from an xsl:param
*
* @throws TransformerException
*/
public ElemParam(ElemParam param) throws TransformerException
{
super(param);
}
/**
* This function is called after everything else has been
* recomposed, and allows the template to set remaining
* values that may be based on some other property that
* depends on recomposition.
*/
public void compose(StylesheetRoot sroot) throws TransformerException
{
super.compose(sroot);
m_qnameID = sroot.getComposeState().getQNameID(m_qname);
if(m_parentNode.getXSLToken() == Constants.ELEMNAME_TEMPLATE)
((ElemTemplate)m_parentNode).m_inArgsSize++;
}
/**
* Execute a variable declaration and push it onto the variable stack.
* @see <a href="http://www.w3.org/TR/xslt#variables">variables in XSLT Specification</a>
*
* @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) throws TransformerException
{
if (TransformerImpl.S_DEBUG)
transformer.getTraceManager().fireTraceEvent(this);
VariableStack vars = transformer.getXPathContext().getVarStack();
if(!vars.isLocalSet(m_index))
{
int sourceNode = transformer.getXPathContext().getCurrentNode();
XObject var = getValue(transformer, sourceNode);
// transformer.getXPathContext().getVarStack().pushVariable(m_qname, var);
transformer.getXPathContext().getVarStack().setLocalVariable(m_index, var);
}
if (TransformerImpl.S_DEBUG)
transformer.getTraceManager().fireTraceEndEvent(this);
}
}