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


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 org.jboss.metadata.spi.MetaData;
25 import org.jboss.metadata.spi.loader.MetaDataLoader;
26 import org.jboss.metadata.spi.retrieval.MetaDataItem;
27 import org.jboss.metadata.spi.retrieval.MetaDatasItem;
28
29 /**
30  * BasicMetaDatasItem.
31  *
32  * @author <a HREF="adrian@jboss.com">Adrian Brock</a>
33  * @version $Revision: 45742 $
34  */
35 public class BasicMetaDatasItem extends BasicItem<Object JavaDoc[]> implements MetaDatasItem
36 {
37    /** The meta data items */
38    private MetaDataItem[] metaDataItems;
39    
40    /** The meta data */
41    private Object JavaDoc[] metaDatas;
42    
43    /**
44     * Create a new BasicMetaDatasItem.
45     *
46     * @param loader the loader
47     * @param metaDataItems the meta data items
48     */
49    public BasicMetaDatasItem(MetaDataLoader loader, MetaDataItem[] metaDataItems)
50    {
51       super(loader);
52       
53       if (metaDataItems == null)
54          throw new IllegalArgumentException JavaDoc("Null metaDataItems");
55       
56       this.metaDataItems = metaDataItems;
57       
58       if (metaDataItems.length == 0)
59          metaDatas = MetaData.NO_METADATA;
60    }
61
62    public Object JavaDoc[] getValue()
63    {
64       if (metaDatas == null)
65       {
66          Object JavaDoc[] temp = new Object JavaDoc[metaDataItems.length];
67          for (int i = 0; i < temp.length; ++i)
68             temp[i] = metaDataItems[i].getValue();
69          metaDatas = temp;
70       }
71       return metaDatas;
72    }
73
74    public MetaDataItem[] getMetaDatas()
75    {
76       return metaDataItems;
77    }
78
79    public boolean isCachable()
80    {
81       if (super.isCachable() == false)
82          return false;
83       
84       for (MetaDataItem item : metaDataItems)
85       {
86          if (item.isCachable() == false)
87             return false;
88       }
89       
90       return true;
91    }
92
93    public boolean isValid()
94    {
95       if (super.isValid() == false)
96          return false;
97       
98       for (MetaDataItem item : metaDataItems)
99       {
100          if (item.isValid() == false)
101             return false;
102       }
103       
104       return true;
105    }
106 }
107
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