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Wed Mar 24 16:00:00 GMT 2004
VariableExp
package examples.interpreter.aspectj; /* -*- 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.patterns. * * Contributor(s): */ /** * Implements a variable expression for booleans. This is a concrete boolean * expression * * @author Jan Hannemann * @author Gregor Kiczales * @version 1.0, 05/13/02 */ public class VariableExp implements BooleanExp { /** * the name of the variable this object represents */ protected String name = null; /** * Creates a new variable expression with a given name * * @param name the name of the new variable */ public VariableExp(String name) { this.name = name; } /** * Accessor for the variable's name * * @returns the name of the variable */ public String getName() { return name; } /** * Evaluates this expression in the given <i>Context</i> * * @param c the context to evaluate the expression in * @returns the boolean value of the expression */ public boolean evaluate(Context c) { return c.lookup(name); } }
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