1 /*
2  * Copyright (c) 2009, 2019, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
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22  *
23  */
24 
25 package shared;
26 
27 import java.util.HashMap;
28 import java.util.Map;
29 
30 /*******************************************************************/
31 // Class loader which has local class file storage in memory
32 /*******************************************************************/
33 
34 public class ByteArrayClassLoader extends ClassLoader {
35     private Map<String, byte[]> classes;
36 
ByteArrayClassLoader()37     public ByteArrayClassLoader() {
38         classes = new HashMap<String, byte[]>();
39     }
40 
ByteArrayClassLoader(Map<String, byte[]> classes)41     public ByteArrayClassLoader(Map<String, byte[]> classes) {
42         this.classes = classes;
43     }
44 
appendClass(String name, byte[] classFile)45     public void appendClass(String name, byte[] classFile) {
46         classes.put(name, classFile);
47     }
48 
findClass(String name)49     public Class findClass (String name) throws ClassNotFoundException {
50         if (classes.containsKey(name)) {
51             byte[] classData = classes.get(name);
52             return defineClass(name, classData, 0, classData.length);
53         } else {
54             throw new ClassNotFoundException("Can't find requested class: " + name);
55         }
56     }
57 }
58