DefaultPropertyReader


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3     * Copyright 2005, JBoss Inc., and individual contributors as indicated
4     * by the @authors tag. See the copyright.txt in the distribution for a
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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.util.property;
23  
24  /**
25   * Reads properties from files specified via a system property.
26   *
27   * <p>Unless otherwise specified, propertie filenames will be read from
28   *    the <tt>org.jboss.properties</tt> singleton or array property.
29   *
30   * @version <tt>$Revision: 1958 $</tt>
31   * @author  <a HREF="mailto:jason@planet57.com">Jason Dillon</a>
32   */
33  public final class DefaultPropertyReader
34     extends FilePropertyReader
35  {
36     //
37     // Might want to have a org.jboss.properties.property.name or something
38     // property to determine what property name to read from.
39     //
40     // For now just use 'properties'
41     //
42  
43     /** Default property name to read filenames from */
44     public static final String   DEFAULT_PROPERTY_NAME = "properties";
45  
46     /**
47      * Construct a <tt>DefaultPropertyReader</tt> with a specified property 
48      * name.
49      *
50      * @param propertyName    Property name.
51      */
52     public DefaultPropertyReader(final String   propertyName) {
53        super(getFilenames(propertyName));
54     }
55  
56     /**
57      * Construct a <tt>DefaultPropertyReader</tt>.
58      */
59     public DefaultPropertyReader() {
60        this(DEFAULT_PROPERTY_NAME);
61     }
62     
63     /**
64      * Get an array of filenames to load.
65      *
66      * @param propertyName  Property to read filenames from.
67      * @return              Array of filenames.
68      */
69     public static String  [] getFilenames(final String   propertyName)
70        throws PropertyException
71     {
72        String   filenames[];
73  
74        // check for singleton property first
75        Object   filename = PropertyManager.getProperty(propertyName);
76        if (filename != null) {
77           filenames = new String  [] { String.valueOf(filename) };
78        }
79        else {
80           // if no singleton property exists then look for array props
81           filenames = PropertyManager.getArrayProperty(propertyName);
82        }
83  
84        return filenames;
85     }
86  }
87
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