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Java > Open Source Codes > org > jboss > metadata > spi > retrieval > basic > BasicItem


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2006, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.metadata.spi.retrieval.basic;
23
24 import java.util.concurrent.atomic.AtomicBoolean JavaDoc;
25
26 import org.jboss.metadata.spi.loader.MetaDataLoader;
27 import org.jboss.metadata.spi.retrieval.Item;
28
29 /**
30  * BasicItem.
31  *
32  * @param <T> The item type
33  * @author <a HREF="adrian@jboss.com">Adrian Brock</a>
34  * @version $Revision: 57133 $
35  */
36 public abstract class BasicItem<T> implements Item<T>
37 {
38    /** The loader */
39    private MetaDataLoader loader;
40
41    /** Whether this is valid */
42    private AtomicBoolean JavaDoc valid = new AtomicBoolean JavaDoc(true);
43
44    /**
45     * Create a new BasicItem.
46     *
47     * @param loader the loader
48     */
49    public BasicItem(MetaDataLoader loader)
50    {
51       this.loader = loader;
52    }
53    
54    public boolean isCachable()
55    {
56       return loader.isCachable(this);
57    }
58
59    public boolean isValid()
60    {
61       return valid.get();
62    }
63    
64    public void invalidate()
65    {
66       this.valid.set(false);
67    }
68 }
69
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