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    }