--- /dev/null 2015-11-20 17:44:40.000000000 +0100 +++ new/jdk/test/java/lang/System/LoggerFinder/internal/backend/SystemClassLoader.java 2015-11-20 17:44:39.000000000 +0100 @@ -0,0 +1,98 @@ +/* + * Copyright (c) 2015, 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. + */ + +import java.io.IOException; +import java.net.URL; +import java.util.Enumeration; +import java.lang.System.LoggerFinder; + +/** + * A custom class loader which can hide the registered LoggerProvider + * depending on the value of a test.logger.hidesProvider system property. + * @author danielfuchs + */ +public class SystemClassLoader extends ClassLoader { + + final public boolean hidesProvider; + + public SystemClassLoader() { + hidesProvider = Boolean.getBoolean("test.logger.hidesProvider"); + } + public SystemClassLoader(ClassLoader parent) { + super(parent); + hidesProvider = Boolean.getBoolean("test.logger.hidesProvider"); + } + + boolean accept(String name) { + final boolean res = !name.endsWith(LoggerFinder.class.getName()); + if (res == false) { + System.out.println("Hiding " + name); + } + return res; + } + + @Override + public URL getResource(String name) { + if (hidesProvider && !accept(name)) { + return null; + } else { + return super.getResource(name); + } + } + + class Enumerator implements Enumeration { + final Enumeration enumeration; + volatile URL next; + Enumerator(Enumeration enumeration) { + this.enumeration = enumeration; + } + + @Override + public boolean hasMoreElements() { + if (next != null) return true; + if (!enumeration.hasMoreElements()) return false; + if (hidesProvider == false) return true; + next = enumeration.nextElement(); + if (accept(next.getPath())) return true; + next = null; + return hasMoreElements(); + } + + @Override + public URL nextElement() { + final URL res = next == null ? enumeration.nextElement() : next; + next = null; + if (hidesProvider == false || accept(res.getPath())) return res; + return nextElement(); + } + } + + @Override + public Enumeration getResources(String name) throws IOException { + final Enumeration enumeration = super.getResources(name); + return hidesProvider ? new Enumerator(enumeration) : enumeration; + } + + + +}