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/jEdit/tags/jedit-4-2-pre14/bsh/ReflectManager.java

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Java | 88 lines | 27 code | 8 blank | 53 comment | 2 complexity | c65b469801cddb6a9ebd8035d5ce02cf MD5 | raw file
 1/*****************************************************************************
 2 *                                                                           *
 3 *  This file is part of the BeanShell Java Scripting distribution.          *
 4 *  Documentation and updates may be found at http://www.beanshell.org/      *
 5 *                                                                           *
 6 *  Sun Public License Notice:                                               *
 7 *                                                                           *
 8 *  The contents of this file are subject to the Sun Public License Version  *
 9 *  1.0 (the "License"); you may not use this file except in compliance with *
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.                                          *
15 *                                                                           *
16 *  GNU Public License Notice:                                               *
17 *                                                                           *
18 *  Alternatively, the contents of this file may be used under the terms of  *
19 *  the GNU Lesser General Public License (the "LGPL"), in which case the    *
20 *  provisions of LGPL are applicable instead of those above. If you wish to *
21 *  allow use of your version of this file only under the  terms of the LGPL *
22 *  and not to allow others to use your version of this file under the SPL,  *
23 *  indicate your decision by deleting the provisions above and replace      *
24 *  them with the notice and other provisions required by the LGPL.  If you  *
25 *  do not delete the provisions above, a recipient may use your version of  *
26 *  this file under either the SPL or the LGPL.                              *
27 *                                                                           *
28 *  Patrick Niemeyer (pat@pat.net)                                           *
29 *  Author of Learning Java, O'Reilly & Associates                           *
30 *  http://www.pat.net/~pat/                                                 *
31 *                                                                           *
32 *****************************************************************************/
33
34package bsh;
35
36import 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*/
45public 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 clas;
59			try {
60				clas = Class.forName( "bsh.reflect.ReflectManagerImpl" );
61				rfm = (ReflectManager)clas.newInstance();
62			} catch ( Exception 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 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 o );
87}
88