/*
* Copyright (c) 2007-2012, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
/*
* Copyright 2001-2004 The Apache Software Foundation.
*
* Licensed 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: Fallback.java,v 1.2.4.1 2005/09/01 14:22:25 pvedula Exp $
*/
package com.sun.org.apache.xalan.internal.xsltc.compiler;
import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
import com.sun.org.apache.bcel.internal.generic.InstructionList;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError;
/**
* @author Morten Jorgensen
*/
final class Fallback extends Instruction {
private boolean _active = false;
/**
* This element never produces any data on the stack
*/
public Type typeCheck(SymbolTable stable) throws TypeCheckError {
if (_active) {
return(typeCheckContents(stable));
}
else {
return Type.Void;
}
}
/**
* Activate this fallback element
*/
public void activate() {
_active = true;
}
public String toString() {
return("fallback");
}
/**
* Parse contents only if this fallback element is put in place of
* some unsupported element or non-XSLTC extension element
*/
public void parseContents(Parser parser) {
if (_active) parseChildren(parser);
}
/**
* Translate contents only if this fallback element is put in place of
* some unsupported element or non-XSLTC extension element
*/
public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
final ConstantPoolGen cpg = classGen.getConstantPool();
final InstructionList il = methodGen.getInstructionList();
if (_active) translateContents(classGen, methodGen);
}
}