- /*
- * 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: BooleanExpr.java,v 1.6 2004/02/16 22:24:28 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.GOTO;
- import com.sun.org.apache.bcel.internal.generic.InstructionList;
- import com.sun.org.apache.bcel.internal.generic.PUSH;
- 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;
-
- /**
- * This class implements inlined calls to the XSLT standard functions
- * true() and false().
- * @author Jacek Ambroziak
- * @author Santiago Pericas-Geertsen
- */
- final class BooleanExpr extends Expression {
- private boolean _value;
-
- public BooleanExpr(boolean value) {
- _value = value;
- }
-
- public Type typeCheck(SymbolTable stable) throws TypeCheckError {
- _type = Type.Boolean;
- return _type;
- }
-
- public String toString() {
- return _value ? "true()" : "false()";
- }
-
- public boolean getValue() {
- return _value;
- }
-
- public boolean contextDependent() {
- return false;
- }
-
- public void translate(ClassGenerator classGen, MethodGenerator methodGen) {
- ConstantPoolGen cpg = classGen.getConstantPool();
- InstructionList il = methodGen.getInstructionList();
- il.append(new PUSH(cpg, _value));
- }
-
- public void translateDesynthesized(ClassGenerator classGen,
- MethodGenerator methodGen) {
- final InstructionList il = methodGen.getInstructionList();
- if (_value) {
- il.append(NOP); // true list falls through
- }
- else {
- _falseList.add(il.append(new GOTO(null)));
- }
- }
- }