Mercurial > hg > blitz_condensed
comparison src/com/go/trove/util/DelegateClassLoader.java @ 0:3dc0c5604566
Initial checkin of blitz 2.0 fcs - no installer yet.
author | Dan Creswell <dan.creswell@gmail.com> |
---|---|
date | Sat, 21 Mar 2009 11:00:06 +0000 |
parents | |
children |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:3dc0c5604566 |
---|---|
1 /* ==================================================================== | |
2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group | |
3 * ==================================================================== | |
4 * The Tea Software License, Version 1.1 | |
5 * | |
6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. | |
7 * | |
8 * Redistribution and use in source and binary forms, with or without | |
9 * modification, are permitted provided that the following conditions | |
10 * are met: | |
11 * | |
12 * 1. Redistributions of source code must retain the above copyright | |
13 * notice, this list of conditions and the following disclaimer. | |
14 * | |
15 * 2. Redistributions in binary form must reproduce the above copyright | |
16 * notice, this list of conditions and the following disclaimer in | |
17 * the documentation and/or other materials provided with the | |
18 * distribution. | |
19 * | |
20 * 3. The end-user documentation included with the redistribution, | |
21 * if any, must include the following acknowledgment: | |
22 * "This product includes software developed by the | |
23 * Walt Disney Internet Group (http://opensource.go.com/)." | |
24 * Alternately, this acknowledgment may appear in the software itself, | |
25 * if and wherever such third-party acknowledgments normally appear. | |
26 * | |
27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must | |
28 * not be used to endorse or promote products derived from this | |
29 * software without prior written permission. For written | |
30 * permission, please contact opensource@dig.com. | |
31 * | |
32 * 5. Products derived from this software may not be called "Tea", | |
33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", | |
34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior | |
35 * written permission of the Walt Disney Internet Group. | |
36 * | |
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED | |
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS | |
41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
48 * ==================================================================== | |
49 * | |
50 * For more information about Tea, please see http://opensource.go.com/. | |
51 */ | |
52 | |
53 package com.go.trove.util; | |
54 import java.io.InputStream; | |
55 import java.net.URL; | |
56 | |
57 /****************************************************************************** | |
58 * ClassLoader that delegates class loading requests if the parent ClassLoader | |
59 * (and its ancestors) can't fulfill the request. Class loading requests are | |
60 * handed off to scouts, which are called upon in sequence to find the class, | |
61 * until the class is found. If neither the parent or scouts can find a | |
62 * requested class, a normal ClassNotFoundException is thrown. | |
63 * | |
64 * @author Brian S O'Neill | |
65 * @version | |
66 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 7/27/01 <!-- $--> | |
67 */ | |
68 public class DelegateClassLoader extends ClassLoader { | |
69 private ClassLoader[] mScouts; | |
70 | |
71 /** | |
72 * @param parent ClassLoader that gets first chance to load a class | |
73 * @param scouts ClassLoaders that get next chances to load a class, if the | |
74 * parent couldn't find it. | |
75 */ | |
76 public DelegateClassLoader(ClassLoader parent, ClassLoader[] scouts) { | |
77 super(parent); | |
78 mScouts = (ClassLoader[])scouts.clone(); | |
79 } | |
80 | |
81 /** | |
82 * @param scouts ClassLoaders that get next chances to load a class, if the | |
83 * parent couldn't find it. | |
84 * @deprecated Actual parent ClassLoader must always be provided to prevent | |
85 * unexpected behavior. | |
86 */ | |
87 public DelegateClassLoader(ClassLoader[] scouts) { | |
88 super(); | |
89 mScouts = (ClassLoader[])scouts.clone(); | |
90 } | |
91 | |
92 protected synchronized Class findClass(String name) | |
93 throws ClassNotFoundException | |
94 { | |
95 for (int i=0; i<mScouts.length; i++) { | |
96 try { | |
97 return mScouts[i].loadClass(name); | |
98 } | |
99 catch (ClassNotFoundException e) { | |
100 } | |
101 } | |
102 throw new ClassNotFoundException(name); | |
103 } | |
104 | |
105 protected URL findResource(String name) { | |
106 URL resource = null; | |
107 | |
108 try { | |
109 for (int i=0; i<mScouts.length; i++) { | |
110 resource = mScouts[i].getResource(name); | |
111 if (resource != null) { | |
112 return resource; | |
113 } | |
114 } | |
115 } | |
116 catch (Exception e) { | |
117 e.printStackTrace(); | |
118 } | |
119 return resource; | |
120 } | |
121 } |