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

    21  * questions.

    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 

    37     public ByteArrayClassLoader() {

    38         classes = new HashMap<String, byte[]>();

    39     }

    40 

    41     public ByteArrayClassLoader(Map<String, byte[]> classes) {

    42         this.classes = classes;

    43     }

    44 

    45     public void appendClass(String name, byte[] classFile) {

    46         classes.put(name, classFile);

    47     }

    48 

    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 }