DescriptionMetaDataContainer


1   /*
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4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
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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.resource.metadata;
23  
24  import java.io.Serializable  ;
25  import java.util.Collection  ;
26  import java.util.Iterator  ;
27  import java.util.Locale  ;
28  
29  import EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap;
30  
31  /**
32   * An abstract class for meta data that has descriptions
33   *
34   * @author <a HREF="mailto:adrian@jboss.org">Adrian Brock</a>
35   * @version $Revision: 38342 $
36   */
37  public class DescriptionMetaDataContainer implements Serializable  
38  {
39     private static final long serialVersionUID = 2831943526217092377L;
40  
41     /** The descriptions */
42     private ConcurrentReaderHashMap descriptions = new ConcurrentReaderHashMap();
43  
44     public DescriptionMetaDataContainer()
45     {
46        DescriptionMetaData dmd = new DescriptionMetaData();
47        descriptions.put(dmd.getLanguage(), dmd);
48     }
49  
50     /**
51      * Get the desription for the default language
52      * or the first description if there is no default
53      * 
54      * @return the description for the default language
55      */
56     public DescriptionMetaData getDescription()
57     {
58        // Try the default locale
59        DescriptionMetaData dmd = (DescriptionMetaData) descriptions.get(Locale.getDefault().getLanguage());
60        // No description using the default locale, just use the first
61        if (dmd == null)
62        {
63           for (Iterator   i = descriptions.values().iterator(); i.hasNext();)
64           {
65              dmd = (DescriptionMetaData) i.next();
66              break;
67           }
68        }
69        return dmd;
70     }
71     
72     /**
73      * Get the description for the give language
74      * 
75      * @param lang the language
76      * @return the description
77      */
78     public DescriptionMetaData getDescription(String   lang)
79     {
80        return (DescriptionMetaData) descriptions.get(lang);
81     }
82     
83     /**
84      * Add a description
85      * 
86      * @param dmd the description
87      */
88     public void addDescription(DescriptionMetaData dmd)
89     {
90        descriptions.put(dmd.getLanguage(), dmd);
91     }
92     
93     /**
94      * Get the descriptions
95      * 
96      * @return the descriptions
97      */
98     public Collection   getDescriptions()
99     {
100       return descriptions.values();
101    }
102    
103    public String   toString()
104    {
105       StringBuffer   buffer = new StringBuffer  ();
106       buffer.append("DescriptionMetaDataContainer").append('@');
107       buffer.append(Integer.toHexString(System.identityHashCode(this)));
108       buffer.append("[descriptions=").append(descriptions.values());
109       buffer.append(']');
110       return buffer.toString();
111    }
112 }
113
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