1 /*

     2  * Copyright (c) 2001, 2013, 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 package sun.misc;

    26 

    27 import java.util.ArrayList;

    28 import java.util.List;

    29 

    30 /**

    31  * This is an abstract base class originally intended to be called by

    32  * {@code java.lang.ClassLoader} when {@code ClassFormatError} is

    33  * thrown inside {@code defineClass()}. It is no longer hooked into

    34  * {@code ClassLoader} and will be removed in a future release.

    35  *

    36  * @author      Stanley Man-Kit Ho

    37  */

    38 

    39 @Deprecated

    40 public abstract class ClassFileTransformer {

    41 

    42     private static final List<ClassFileTransformer> transformers

    43         = new ArrayList<ClassFileTransformer>();

    44 

    45     /**

    46      * Add the class file transformer object.

    47      *

    48      * @param t Class file transformer instance

    49      */

    50     public static void add(ClassFileTransformer t) {

    51         synchronized (transformers) {

    52             transformers.add(t);

    53         }

    54     }

    55 

    56     /**

    57      * Get the array of ClassFileTransformer object.

    58      *

    59      * @return ClassFileTransformer object array

    60      */

    61     public static ClassFileTransformer[] getTransformers() {

    62         synchronized (transformers) {

    63             ClassFileTransformer[] result = new ClassFileTransformer[transformers.size()];

    64             return transformers.toArray(result);

    65         }

    66     }

    67 

    68 

    69     /**

    70      * Transform a byte array from one to the other.

    71      *

    72      * @param b Byte array

    73      * @param off Offset

    74      * @param len Length of byte array

    75      * @return Transformed byte array

    76      */

    77     public abstract byte[] transform(byte[] b, int off, int len)

    78         throws ClassFormatError;

    79 }