--- /dev/null 2019-02-07 20:54:51.336000000 +0300 +++ new/test/lib/jdk/test/lib/classloader/FilterClassLoader.java 2019-02-08 18:34:01.403189028 +0300 @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2014, 2017, 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 jdk.test.lib.classloader; + +import java.util.function.Predicate; +/** + * A classloader, which using target classloader in case provided condition + * for class name is met, and using parent otherwise + */ +public class FilterClassLoader extends ClassLoader { + + private final ClassLoader target; + private final Predicate condition; + + public FilterClassLoader(ClassLoader target, ClassLoader parent, + Predicate condition) { + super(parent); + this.condition = condition; + this.target = target; + } + + @Override + public Class loadClass(String name) throws ClassNotFoundException { + if (condition.test(name)) { + return target.loadClass(name); + } + return super.loadClass(name); + } +}