001 /***************************************************************************** 002 * Copyright (c) PicoContainer Organization. All rights reserved. * 003 * ------------------------------------------------------------------------- * 004 * The software in this package is published under the terms of the BSD * 005 * style license a copy of which has been included with this distribution in * 006 * the LICENSE.txt file. * 007 * * 008 * Idea by Rachel Davies, Original code by various * 009 *****************************************************************************/ 010 package org.nanocontainer.aop.defaults; 011 012 import org.nanocontainer.aop.ComponentPointcut; 013 014 /** 015 * Component pointcut that matches against a component key. 016 * 017 * @author Stephen Molitor 018 * @version $Revision: 3144 $ 019 */ 020 public class KeyEqualsComponentPointcut implements ComponentPointcut { 021 022 private final Object componentKey; 023 024 /** 025 * Creates a new <code>KeyEqualsComponentPointcut</code> that matches 026 * against <code>componentKey</code>. 027 * 028 * @param componentKey the component key to match against. 029 */ 030 public KeyEqualsComponentPointcut(Object componentKey) { 031 if (componentKey == null) { 032 throw new NullPointerException("componentKey cannot be null"); 033 } 034 this.componentKey = componentKey; 035 } 036 037 /** 038 * Tests to see if the <code>componentKey</code> matches the component key 039 * passed to the constructor. 040 * 041 * @param componentKey the candidate component key to match against. 042 * @return true if <code>componentKey</code> is equivalent to the 043 * component key passed to the constructor, else false. 044 */ 045 public boolean picks(Object componentKey) { 046 return this.componentKey.equals(componentKey); 047 } 048 049 }