jdk/src/share/classes/sun/misc/ClassFileTransformer.java
author alanb
Fri, 08 Mar 2013 19:51:09 +0000
changeset 16063 18e7ee7b4301
parent 5506 202f599c92aa
child 23010 6dadb192ad81
permissions -rw-r--r--
8009645: ClassFileTransformer hooks in ClassLoader no longer required Reviewed-by: mchung, iris
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/*
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 * Copyright (c) 2001, 2008, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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package sun.misc;
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import java.util.ArrayList;
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import java.util.List;
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/**
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 * This is an abstract base class originally intended to be called by
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 * {@code java.lang.ClassLoader} when {@code ClassFormatError} is
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 * thrown inside {@code defineClass()}. It is no longer hooked into
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 * {@code ClassLoader} and will be removed in a future release.
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 *
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 * @author      Stanley Man-Kit Ho
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 */
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@Deprecated
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public abstract class ClassFileTransformer {
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    private static final List<ClassFileTransformer> transformers
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        = new ArrayList<ClassFileTransformer>();
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    /**
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     * Add the class file transformer object.
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     *
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     * @param t Class file transformer instance
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     */
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    public static void add(ClassFileTransformer t) {
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        synchronized (transformers) {
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            transformers.add(t);
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        }
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    }
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    /**
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     * Get the array of ClassFileTransformer object.
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     *
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     * @return ClassFileTransformer object array
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     */
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    public static ClassFileTransformer[] getTransformers() {
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        synchronized (transformers) {
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            ClassFileTransformer[] result = new ClassFileTransformer[transformers.size()];
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            return transformers.toArray(result);
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        }
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    }
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    /**
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     * Transform a byte array from one to the other.
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     *
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     * @param b Byte array
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     * @param off Offset
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     * @param len Length of byte array
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     * @return Transformed byte array
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     */
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    public abstract byte[] transform(byte[] b, int off, int len)
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        throws ClassFormatError;
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}