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1 /*****************************************************************************
2  * *
3  * This file is part of the BeanShell Java Scripting distribution. *
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6  * Sun Public License Notice: *
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8  * The contents of this file are subject to the Sun Public License Version *
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10  * the License. A copy of the License is available at http://www.sun.com *
11  * *
12  * The Original Code is BeanShell. The Initial Developer of the Original *
13  * Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright *
14  * (C) 2000. All Rights Reserved. *
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18  * Alternatively, the contents of this file may be used under the terms of *
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28  * Patrick Niemeyer (pat@pat.net) *
29  * Author of Learning Java, O'Reilly & Associates *
30  * http://www.pat.net/~pat/ *
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32  *****************************************************************************/
33
34 package bsh;
35
36 import bsh.Capabilities.Unavailable;
37
38 /**
39     ReflectManager is a dynamically loaded extension that supports extended
40     reflection features supported by JDK1.2 and greater.
41
42     In particular it currently supports accessible method and field access
43     supported by JDK1.2 and greater.
44 */
45 public abstract class ReflectManager
46 {
47     private static ReflectManager rfm;
48
49     /**
50         Return the singleton bsh ReflectManager.
51         @throws Unavailable
52     */
53     public static ReflectManager getReflectManager()
54         throws Unavailable
55     {
56         if ( rfm == null )
57         {
58             Class JavaDoc clas;
59             try {
60                 clas = Class.forName( "bsh.reflect.ReflectManagerImpl" );
61                 rfm = (ReflectManager)clas.newInstance();
62             } catch ( Exception JavaDoc e ) {
63                 throw new Unavailable("Reflect Manager unavailable: "+e);
64             }
65         }
66     
67         return rfm;
68     }
69
70     /**
71         Reflect Manager Set Accessible.
72         Convenience method to invoke the reflect manager.
73         @throws Unavailable
74     */
75     public static boolean RMSetAccessible( Object JavaDoc obj )
76         throws Unavailable
77     {
78         return getReflectManager().setAccessible( obj );
79     }
80
81     /**
82         Set a java.lang.reflect Field, Method, Constructor, or Array of
83         accessible objects to accessible mode.
84         @return true if the object was accessible or false if it was not.
85     */
86     public abstract boolean setAccessible( Object JavaDoc o );
87 }
88
89
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