RSS feed
[root]
/
document
/
software design
/
Design pattern example in aspect programming
/
examples
/
java
/
interpreter
login:
password:
title search:
Search this site
Enter your search terms
Web
www.carfield.com.hk
Submit search form
Prev
Next
Wed Mar 24 16:00:00 GMT 2004
NotExp
package 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.patterns. * * Contributor(s): */ /** * Implements negation for booleans expressions. This is a concrete boolean * expression * * @author Jan Hannemann * @author Gregor Kiczales * @version 1.0, 05/13/02 */ public class NotExp implements BooleanExp { /** * the expression this expression negates */ protected BooleanExp exp = null; /** * Creates a new NOT expression negating the argument expression * * @param exp the expression to negate */ public NotExp(BooleanExp exp) { this.exp = exp; } /** * 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 (! exp.evaluate(c)); } /** * Replaces a variable with an expression * * @param name the name of the variable * @param exp the expression to replace the variable * @returns a copy of this expression with the variable replaced */ public BooleanExp replace(String name, BooleanExp exp) { return new NotExp(this.exp.replace(name, exp)); } /** * Copies this expression * * @returns the copied expression */ public BooleanExp copy() { return new NotExp(exp.copy()); } }
(google search)
(amazon search)
1
2
3
second
download zip of files only
Prev
Next