org.apache.xalan.templates.ElemFallback Maven / Gradle / Ivy
/*
* 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: ElemFallback.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;
/**
* Implement xsl:fallback.
*
*
*
*
* @see fallback in XSLT Specification
* @xsl.usage advanced
*/
public class ElemFallback extends ElemTemplateElement
{
static final long serialVersionUID = 1782962139867340703L;
/**
* 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_FALLBACK;
}
/**
* Return the node name.
*
* @return The Element's name
*/
public String getNodeName()
{
return Constants.ELEMNAME_FALLBACK_STRING;
}
/**
* This is the normal call when xsl:fallback is instantiated.
* In accordance with the XSLT 1.0 Recommendation, chapter 15,
* "Normally, instantiating an xsl:fallback element does nothing."
*
* @param transformer non-null reference to the the current transform-time state.
*
* @throws TransformerException
*/
public void execute(
TransformerImpl transformer)
throws TransformerException
{
}
/**
* Execute the fallback elements. This must be explicitly called to
* instantiate the content of an xsl:fallback element.
* When an XSLT transformer performs fallback for an instruction
* element, if the instruction element has one or more xsl:fallback
* children, then the content of each of the xsl:fallback children
* must be instantiated in sequence; otherwise, an error must
* be signaled. The content of an xsl:fallback element is a template.
*
* @param transformer non-null reference to the the current transform-time state.
*
* @throws TransformerException
*/
public void executeFallback(
TransformerImpl transformer)
throws TransformerException
{
int parentElemType = m_parentNode.getXSLToken();
if (Constants.ELEMNAME_EXTENSIONCALL == parentElemType
|| Constants.ELEMNAME_UNDEFINED == parentElemType)
{
transformer.executeChildTemplates(this, true);
}
else
{
// Should never happen
System.out.println(
"Error! parent of xsl:fallback must be an extension or unknown element!");
}
}
}