/*******************************************************************************
* Copyright (c) 2002 - 2006 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package com.ibm.wala.fixpoint;
/**
* A boolean variable for dataflow analysis.
*/
public class BooleanVariable extends AbstractVariable<BooleanVariable> {
private boolean B;
public BooleanVariable() {
}
/**
* @param b initial value for this variable
*/
public BooleanVariable(boolean b) {
this.B = b;
}
@Override
public void copyState(BooleanVariable other) {
if (other == null) {
throw new IllegalArgumentException("other null");
}
B = other.B;
}
public boolean sameValue(BooleanVariable other) {
if (other == null) {
throw new IllegalArgumentException("other is null");
}
return B == other.B;
}
@Override
public String toString() {
return (B ? "[TRUE]" : "[FALSE]");
}
/**
* @return the value of this variable
*/
public boolean getValue() {
return B;
}
/**
* @param other
* @throws IllegalArgumentException if other is null
*/
public void or(BooleanVariable other) {
if (other == null) {
throw new IllegalArgumentException("other is null");
}
B = B | other.B;
}
public void set(boolean b) {
B = b;
}
@Override
public boolean equals(Object obj) {
return this == obj;
}
}