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 *****************************************************************************/ 008 009 package org.picocontainer.gems.constraints; 010 011 import org.picocontainer.ComponentAdapter; 012 013 /** 014 * Constraint that accepts an adapter of a specific key. 015 * 016 * @author Nick Sieger 017 */ 018 @SuppressWarnings("serial") 019 public final class IsKey extends AbstractConstraint { 020 021 022 private final Object key; 023 024 /** 025 * Creates a new <code>IsKey</code> instance. 026 * 027 * @param key the key to match 028 */ 029 public IsKey(final Object key) { 030 this.key = key; 031 } 032 033 @Override 034 public boolean evaluate(final ComponentAdapter adapter) { 035 return key.equals(adapter.getComponentKey()); 036 } 037 038 }