/*
* 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.xslt;
import org.w3c.dom.*;
import org.xml.sax.*;
import org.apache.xalan.xpath.*;
import org.apache.xalan.xpath.xml.QName;
import org.apache.xalan.xslt.trace.SelectionEvent;
import org.apache.xalan.xslt.res.XSLTErrorResources;
/**
* <meta name="usage" content="advanced"/>
* Implement xsl:variable.
*/
public class ElemVariable extends ElemTemplateElement
{
public XPath m_selectPattern = null;
public QName m_qname = null;
public boolean m_isTopLevel = false;
// public transient XObject m_value = null;
// public transient Node m_varContext = null;
public int getXSLToken()
{
return Constants.ELEMNAME_VARIABLE;
}
/**
* Copy constructor.
*/
public ElemVariable (ElemVariable param)
throws SAXException
{
super(null,
param.m_stylesheet, param.m_elemName,
null, param.m_lineNumber, param.m_columnNumber);
m_selectPattern = param.m_selectPattern;
m_qname = param.m_qname;
m_isTopLevel = param.m_isTopLevel;
// m_value = param.m_value;
// m_varContext = param.m_varContext;
}
public ElemVariable (XSLTEngineImpl processor,
Stylesheet stylesheetTree,
String name,
AttributeList atts,
int lineNumber, int columnNumber)
throws SAXException
{
super(processor, stylesheetTree, name, atts, lineNumber, columnNumber);
int nAttrs = atts.getLength();
for(int i = 0; i < nAttrs; i++)
{
String aname = atts.getName(i);
int tok = getAttrTok(aname);
switch(tok)
{
case Constants.TATTRNAME_SELECT:
m_selectPattern = m_stylesheet.createXPath(atts.getValue(i), this);
break;
case Constants.TATTRNAME_NAME:
m_qname = new QName(atts.getValue(i), stylesheetTree.m_namespaces);
break;
case Constants.TATTRNAME_XMLSPACE:
processSpaceAttr(atts, i);
break;
default:
if(!isAttrOK(aname, atts, i))
{
processor.error(XSLTErrorResources.ER_ILLEGAL_ATTRIBUTE, new Object[] {name, aname}); //name+" has an illegal attribute: "+aname);
}
}
}
if(null == m_qname)
processor.error(XSLTErrorResources.ER_NO_NAME_ATTRIB, new Object[] {name}); //name+" must have a 'name' attribute.");
}
public void execute(XSLTEngineImpl processor,
Node sourceTree,
Node sourceNode,
QName mode)
throws XSLProcessorException,
java.net.MalformedURLException,
java.io.FileNotFoundException,
java.io.IOException,
SAXException
{
super.execute(processor, sourceTree, sourceNode, mode);
// System.out.println("Calling getValue for variable named: "+m_qname.m_localpart);
XObject var = getValue(processor, sourceTree, sourceNode);
processor.getVarStack().pushVariable(m_qname, var);
}
/**
* Get the XObject representation of the variable.
*/
public XObject getValue(XSLTEngineImpl processor,
Node sourceTree,
Node sourceNode)
throws XSLProcessorException,
java.net.MalformedURLException,
java.io.FileNotFoundException,
java.io.IOException,
SAXException
{
XObject var;
if(null != m_selectPattern)
{
XPathSupport execContext = processor.getXMLProcessorLiaison();
var = m_selectPattern.execute(execContext, sourceNode, this);
if(null != m_stylesheet.m_stylesheetRoot.m_traceListeners)
{
m_stylesheet.m_stylesheetRoot.fireSelectedEvent(new SelectionEvent(processor,
sourceNode,
this,
"select",
m_selectPattern,
var));
}
}
else
{
// Use result tree fragment
DocumentFragment df = processor.createResultTreeFrag(m_stylesheet, this,
sourceTree,
sourceNode, null);
var = new XRTreeFrag(df);
}
return var;
}
}