- /*
- * 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 1.7 2004/02/16 22:24:29 minchau 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);
- }
- }