Showing the changes to java/pkg/sun/misc/ClassFileTransformer.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2001, 2008, 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 | + | |
| 29 | +/** | |
| 30 | + * This is an abstract base class which is called by java.lang.ClassLoader | |
| 31 | + * when ClassFormatError is thrown inside defineClass(). | |
| 32 | + * | |
| 33 | + * The purpose of this class is to allow applications (e.g. Java Plug-in) | |
| 34 | + * to have a chance to transform the byte code from one form to another | |
| 35 | + * if necessary. | |
| 36 | + * | |
| 37 | + * One application of this class is used by Java Plug-in to transform | |
| 38 | + * malformed JDK 1.1 class file into a well-formed Java 2 class file | |
| 39 | + * on-the-fly, so JDK 1.1 applets with malformed class file in the | |
| 40 | + * Internet may run in Java 2 after transformation. | |
| 41 | + * | |
| 42 | + * @author Stanley Man-Kit Ho | |
| 43 | + */ | |
| 44 | + | |
| 45 | +public abstract class ClassFileTransformer | |
| 46 | +{ | |
| 47 | + // Singleton of ClassFileTransformer | |
| 48 | + // | |
| 49 | + private static ArrayList<ClassFileTransformer> transformerList | |
| 50 | + = new ArrayList<ClassFileTransformer>(); | |
| 51 | + private static ClassFileTransformer[] transformers | |
| 52 | + = new ClassFileTransformer[0]; | |
| 53 | + | |
| 54 | + /** | |
| 55 | + * Add the class file transformer object. | |
| 56 | + * | |
| 57 | + * @param t Class file transformer instance | |
| 58 | + */ | |
| 59 | + public static void add(ClassFileTransformer t) | |
| 60 | + { | |
| 61 | + synchronized(transformerList) | |
| 62 | + { | |
| 63 | + transformerList.add(t); | |
| 64 | + transformers = transformerList.toArray(new ClassFileTransformer[0]); | |
| 65 | + } | |
| 66 | + } | |
| 67 | + | |
| 68 | + /** | |
| 69 | + * Get the array of ClassFileTransformer object. | |
| 70 | + * | |
| 71 | + * @return ClassFileTransformer object array | |
| 72 | + */ | |
| 73 | + public static ClassFileTransformer[] getTransformers() | |
| 74 | + { | |
| 75 | + // transformers is not intended to be changed frequently, | |
| 76 | + // so it is okay to not put synchronized block here | |
| 77 | + // to speed up performance. | |
| 78 | + // | |
| 79 | + return transformers; | |
| 80 | + } | |
| 81 | + | |
| 82 | + | |
| 83 | + /** | |
| 84 | + * Transform a byte array from one to the other. | |
| 85 | + * | |
| 86 | + * @param b Byte array | |
| 87 | + * @param off Offset | |
| 88 | + * @param len Length of byte array | |
| 89 | + * @return Transformed byte array | |
| 90 | + */ | |
| 91 | + public abstract byte[] transform(byte[] b, int off, int len) | |
| 92 | + throws ClassFormatError; | |
| 93 | +} | |