FilterClassLoader.java revision 2610:d4c30fc77c75
1274987Srpaulo/* 2274987Srpaulo * Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved. 3274987Srpaulo * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4274987Srpaulo * 5274987Srpaulo * This code is free software; you can redistribute it and/or modify it 6274987Srpaulo * under the terms of the GNU General Public License version 2 only, as 7274987Srpaulo * published by the Free Software Foundation. 8274987Srpaulo * 9274987Srpaulo * This code is distributed in the hope that it will be useful, but WITHOUT 10274987Srpaulo * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11274987Srpaulo * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12274987Srpaulo * version 2 for more details (a copy is included in the LICENSE file that 13274987Srpaulo * accompanied this code). 14274987Srpaulo * 15274987Srpaulo * You should have received a copy of the GNU General Public License version 16274987Srpaulo * 2 along with this work; if not, write to the Free Software Foundation, 17274987Srpaulo * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18274987Srpaulo * 19274987Srpaulo * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20274987Srpaulo * or visit www.oracle.com if you need additional information or have any 21274987Srpaulo * questions. 22274987Srpaulo */ 23274987Srpaulo 24274987Srpaulopackage jdk.test.lib.classloader; 25274987Srpaulo 26274987Srpauloimport java.util.function.Predicate; 27274987Srpaulo/** 28274987Srpaulo * A classloader, which using target classloader in case provided condition 29274987Srpaulo * for class name is met, and using parent otherwise 30274987Srpaulo */ 31274987Srpaulopublic class FilterClassLoader extends ClassLoader { 32274987Srpaulo 33274987Srpaulo private final ClassLoader target; 34274987Srpaulo private final Predicate<String> condition; 35274987Srpaulo 36274987Srpaulo public FilterClassLoader(ClassLoader target, ClassLoader parent, 37274987Srpaulo Predicate<String> condition) { 38274987Srpaulo super(parent); 39274987Srpaulo this.condition = condition; 40274987Srpaulo this.target = target; 41274987Srpaulo } 42274987Srpaulo 43274987Srpaulo @Override 44274987Srpaulo public Class<?> loadClass(String name) throws ClassNotFoundException { 45274987Srpaulo if (condition.test(name)) { 46274987Srpaulo return target.loadClass(name); 47274987Srpaulo } 48274987Srpaulo return super.loadClass(name); 49274987Srpaulo } 50274987Srpaulo} 51274987Srpaulo