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     * @version 1.1
018     */
019    public class IsKey extends AbstractConstraint {
020    
021        private Object key;
022    
023        /**
024         * Creates a new <code>IsKey</code> instance.
025         *
026         * @param key the key to match
027         */
028        public IsKey(Object key) {
029            this.key = key;
030        }
031    
032        public boolean evaluate(ComponentAdapter adapter) {
033            return key.equals(adapter.getComponentKey());
034        }
035    
036    }