/*
* @(#)$Id: UnsupportedElement.java,v 1.5 2003/01/30 18:46:02 mkwan Exp $
*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2001-2003 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) 2001, Sun
* Microsystems., http://www.sun.com. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* @author Morten Jorgensen
*
*/
package org.apache.xalan.xsltc.compiler;
import java.util.Vector;
import org.apache.xalan.xsltc.compiler.util.ClassGenerator;
import org.apache.xalan.xsltc.compiler.util.ErrorMsg;
import org.apache.xalan.xsltc.compiler.util.MethodGenerator;
import org.apache.xalan.xsltc.compiler.util.Type;
import org.apache.xalan.xsltc.compiler.util.TypeCheckError;
import org.apache.xalan.xsltc.compiler.util.Util;
final class UnsupportedElement extends SyntaxTreeNode {
private Fallback _fallback = null;
private ErrorMsg _message = null;
/**
* Basic consutrcor - stores element uri/prefix/localname
*/
public UnsupportedElement(String uri, String prefix, String local) {
super(uri, prefix, local);
}
/**
* There are different categories of unsupported elements (believe it
* or not): there are elements within the XSLT namespace (these would
* be elements that are not yet implemented), there are extensions of
* other XSLT processors and there are unrecognised extension elements
* of this XSLT processor. The error message passed to this method
* should describe the unsupported element itself and what category
* the element belongs in.
*/
public void setErrorMessage(ErrorMsg message) {
_message = message;
}
/**
* Displays the contents of this element
*/
public void display(int indent) {
indent(indent);
Util.println("Unsupported element = " + _qname.getNamespace() +
":" + _qname.getLocalPart());
displayContents(indent + IndentIncrement);
}
/**
* Scan all descendants and find the first xsl:fallback element (if any)
*/
private SyntaxTreeNode findFallback(SyntaxTreeNode root) {
// First check if this element exists at all
if (root == null) return null;
// Then check if the element is an xsl:fallback element
if (root instanceof Fallback) return((Fallback)root);
// Then traverse all child elements
Vector children = root.getContents();
if (children != null) {
final int count = children.size();
for (int i = 0; i < count; i++) {
SyntaxTreeNode child = (SyntaxTreeNode)children.elementAt(i);
SyntaxTreeNode node = findFallback(child);
if (node != null) return node;
}
}
return null;
}
/**
* Find any fallback in the descendant nodes; then activate & parse it
*/
public void parseContents(Parser parser) {
_fallback = (Fallback)findFallback(this);
if (_fallback != null) {
_fallback.activate();
_fallback.parseContents(parser);
}
}
/**
* Run type check on the fallback element (if any).
*/
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
if (_fallback == null) {
throw new TypeCheckError(_message);
}
return(_fallback.typeCheck(stable));
}
/**
* Translate the fallback element (if any). The stylesheet should never
* be compiled if an unsupported element does not have a fallback element,
* so this method should never be called unless _fallback != null
*/
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
if (_fallback != null) _fallback.translate(classGen, methodGen);
}
}