/*
* 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 1.2.4.1 2005/09/01 11:44:57 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.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)));
}
}
}