| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * 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); |
| } |
| } |