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Java > Open Source Codes > org > jboss > util > SysPropertyActions


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, 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.util;
23
24 import java.security.PrivilegedAction JavaDoc;
25 import java.security.AccessController JavaDoc;
26
27 /**
28  * Priviledged actions for the package
29  * @author Scott.Stark@jboss.org
30  * @version $Revision: 1958 $
31  */
32 class SysPropertyActions
33 {
34    interface SysProps
35    {
36       SysProps NON_PRIVILEDGED = new SysProps()
37       {
38          public String JavaDoc getProperty(final String JavaDoc name, final String JavaDoc defaultValue)
39          {
40             return System.getProperty(name, defaultValue);
41          }
42       };
43       SysProps PRIVILEDGED = new SysProps()
44       {
45          public String JavaDoc getProperty(final String JavaDoc name, final String JavaDoc defaultValue)
46          {
47             PrivilegedAction JavaDoc action = new PrivilegedAction JavaDoc()
48             {
49                public Object JavaDoc run()
50                {
51                   return System.getProperty(name, defaultValue);
52                }
53             };
54             return (String JavaDoc) AccessController.doPrivileged(action);
55          }
56       };
57       String JavaDoc getProperty(String JavaDoc name, String JavaDoc defaultValue);
58    }
59
60    public static String JavaDoc getProperty(String JavaDoc name, String JavaDoc defaultValue)
61    {
62       String JavaDoc prop;
63       if( System.getSecurityManager() == null )
64          prop = SysProps.NON_PRIVILEDGED.getProperty(name, defaultValue);
65       else
66          prop = SysProps.PRIVILEDGED.getProperty(name, defaultValue);
67       return prop;
68    }
69 }
70
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