1 /* 2 * Copyright (c) 1997, 2012, 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 26 package com.sun.istack.internal.tools; 27 28 import java.util.Collection; 29 30 /** 31 * {@link ClassLoader} that masks a specified set of classes 32 * from its parent class loader. 33 * 34 * <p> 35 * This code is used to create an isolated environment. 36 * 37 * @author Kohsuke Kawaguchi 38 */ 39 public class MaskingClassLoader extends ClassLoader { 40 41 private final String[] masks; 42 43 public MaskingClassLoader(String... masks) { 44 this.masks = masks; 45 } 46 47 public MaskingClassLoader(Collection<String> masks) { 48 this(masks.toArray(new String[masks.size()])); 49 } 50 51 public MaskingClassLoader(ClassLoader parent, String... masks) { 52 super(parent); 53 this.masks = masks; 54 } 55 56 public MaskingClassLoader(ClassLoader parent, Collection<String> masks) { 57 this(parent, masks.toArray(new String[masks.size()])); 58 } 59 60 @Override 61 protected synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException { 62 for (String mask : masks) { 63 if(name.startsWith(mask)) 64 throw new ClassNotFoundException(); 65 } 66 67 return super.loadClass(name, resolve); 68 } 69 }