| /* |
| * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.oracle.java.testlibrary; |
| |
| import java.security.SecureClassLoader; |
| |
| /** |
| * {@code ByteCodeLoader} can be used for easy loading of byte code already |
| * present in memory. |
| * |
| * {@code InMemoryCompiler} can be used for compiling source code in a string |
| * into byte code, which then can be loaded with {@code ByteCodeLoader}. |
| * |
| * @see InMemoryCompiler |
| */ |
| public class ByteCodeLoader extends SecureClassLoader { |
| private final String className; |
| private final byte[] byteCode; |
| |
| /** |
| * Creates a new {@code ByteCodeLoader} ready to load a class with the |
| * given name and the given byte code. |
| * |
| * @param className The name of the class |
| * @param byteCode The byte code of the class |
| */ |
| public ByteCodeLoader(String className, byte[] byteCode) { |
| this.className = className; |
| this.byteCode = byteCode; |
| } |
| |
| @Override |
| protected Class<?> findClass(String name) throws ClassNotFoundException { |
| if (!name.equals(className)) { |
| throw new ClassNotFoundException(name); |
| } |
| |
| return defineClass(name, byteCode, 0, byteCode.length); |
| } |
| |
| /** |
| * Utility method for creating a new {@code ByteCodeLoader} and then |
| * directly load the given byte code. |
| * |
| * @param className The name of the class |
| * @param byteCode The byte code for the class |
| * @throws ClassNotFoundException if the class can't be loaded |
| * @return A {@see Class} object representing the class |
| */ |
| public static Class<?> load(String className, byte[] byteCode) throws ClassNotFoundException { |
| return new ByteCodeLoader(className, byteCode).loadClass(className); |
| } |
| } |