| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache license, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the license for the specific language governing permissions and |
| * limitations under the license. |
| */ |
| |
| package org.apache.logging.log4j.test.junit; |
| |
| import java.lang.reflect.Field; |
| import java.net.URL; |
| import java.net.URLStreamHandler; |
| import java.net.URLStreamHandlerFactory; |
| import java.util.Hashtable; |
| |
| import org.junit.Assert; |
| import org.junit.rules.TestRule; |
| import org.junit.runner.Description; |
| import org.junit.runners.model.Statement; |
| |
| /** |
| * Installs and restores the URL URLStreamHandlerFactory before and after tests. |
| * <p> |
| * Might need tweaking for different JREs. |
| * </p> |
| */ |
| public class URLStreamHandlerFactoryRule implements TestRule { |
| |
| public URLStreamHandlerFactoryRule() { |
| this(null); |
| } |
| |
| public URLStreamHandlerFactoryRule(final URLStreamHandlerFactory newURLStreamHandlerFactory) { |
| this.newURLStreamHandlerFactory = newURLStreamHandlerFactory; |
| } |
| |
| private final URLStreamHandlerFactory newURLStreamHandlerFactory; |
| |
| void clearURLHandlers() throws Exception { |
| final Field handlersFields = URL.class.getDeclaredField("handlers"); |
| if (handlersFields != null) { |
| if (!handlersFields.isAccessible()) { |
| handlersFields.setAccessible(true); |
| } |
| @SuppressWarnings("unchecked") |
| final |
| Hashtable<String, URLStreamHandler> handlers = (Hashtable<String, URLStreamHandler>) handlersFields |
| .get(null); |
| if (handlers != null) { |
| handlers.clear(); |
| } |
| } |
| } |
| |
| @Override |
| public Statement apply(final Statement base, final Description description) { |
| return new Statement() { |
| @Override |
| public void evaluate() throws Throwable { |
| Field factoryField = null; |
| int matches = 0; |
| URLStreamHandlerFactory oldFactory = null; |
| for (final Field field : URL.class.getDeclaredFields()) { |
| if (URLStreamHandlerFactory.class.equals(field.getType())) { |
| factoryField = field; |
| matches++; |
| factoryField.setAccessible(true); |
| oldFactory = (URLStreamHandlerFactory) factoryField.get(null); |
| break; |
| } |
| } |
| Assert.assertNotNull("java.net URL does not declare a java.net.URLStreamHandlerFactory field", |
| factoryField); |
| Assert.assertEquals("java.net.URL declares multiple java.net.URLStreamHandlerFactory fields.", 1, |
| matches); // FIXME There is a break in the loop so always 0 or 1 |
| URL.setURLStreamHandlerFactory(newURLStreamHandlerFactory); |
| try { |
| base.evaluate(); |
| } finally { |
| clearURLHandlers(); |
| factoryField.set(null, null); |
| URL.setURLStreamHandlerFactory(oldFactory); |
| } |
| } |
| }; |
| } |
| } |