package ca.ubc.cs.spl.aspectPatterns.examples.interpreter.java;
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This file is part of the design patterns project at UBC
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* either http://www.mozilla.org/MPL/ or http://aspectj.org/MPL/.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is ca.ubc.cs.spl.aspectPatterns.
*
* For more details and the latest version of this code, please see:
* http://www.cs.ubc.ca/labs/spl/projects/aodps.html
*
* Contributor(s):
*/
/**
* Implements an OR <i>Expression</i> for booleans.
* This is a concrete boolean <i>NonterminalExpression</i>
*
* @author Jan Hannemann
* @author Gregor Kiczales
* @version 1.1, 02/11/04
*/
public class OrExpression implements BooleanExpression {
/**
* stores the first part of this OR <i>Expression</i>
*/
protected BooleanExpression expression1;
/**
* stores the second part of this OR <i>Expression</i>
*/
protected BooleanExpression expression2;
/**
* Creates a new OR <i>Expression</i> with the given parts
*
* @param expression1 the first <i>Expression</i>
* @param expression1 the second <i>Expression</i>
*/
public OrExpression(BooleanExpression op1, BooleanExpression op2) {
this.expression1 = op1;
this.expression2 = op2;
}
/**
* Evaluates this <i>Expression</i> in the given <i>Context</i>
*
* @param c the context to evaluate the <i>Expression</i> in
* @returns the boolean value of the <i>Expression</i>
*/
public boolean evaluate(VariableContext c) {
return (expression1.evaluate(c) || expression2.evaluate(c));
}
/**
* Replaces a variable with an <i>Expression</i>
*
* @param name the name of the variable
* @param exp the <i>Expression</i> to replace the variable
* @returns a copy of this <i>Expression</i> with the variable replaced
*/
public BooleanExpression replace(String name, BooleanExpression exp) {
return new OrExpression(expression1.replace(name, exp), expression2.replace(name,exp));
}
/**
* Copies this <i>Expression</i>
*
* @returns the copied <i>Expression</i>
*/
public BooleanExpression copy() {
return new OrExpression(expression1.copy(), expression2.copy());
}
}