| /** |
| * 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.avro.reflect; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.junit.Test; |
| |
| public class TestReflectionUtil { |
| |
| @Test |
| public void testUnsafeUtil() { |
| new Tester().checkUnsafe(); |
| } |
| |
| @Test |
| public void testUnsafeWhenNotExists() throws Exception { |
| ClassLoader cl = new NoUnsafe(); |
| Class<?> testerClass = cl.loadClass(Tester.class.getName()); |
| testerClass.getDeclaredMethod("checkUnsafe").invoke(testerClass.newInstance()); |
| } |
| |
| public static final class Tester { |
| public Tester() {} |
| public void checkUnsafe() { |
| ReflectionUtil.getFieldAccess(); |
| } |
| |
| } |
| |
| private static final class NoUnsafe extends ClassLoader { |
| private ClassLoader parent = TestReflectionUtil.class.getClassLoader(); |
| |
| @Override |
| public java.lang.Class<?> loadClass(String name) |
| throws ClassNotFoundException { |
| Class<?> clazz = findLoadedClass(name); |
| if (clazz != null) { |
| return clazz; |
| } |
| if ("sun.misc.Unsafe".equals(name)) { |
| throw new ClassNotFoundException(name); |
| } |
| if (!name.startsWith("org.apache.avro.")) { |
| return parent.loadClass(name); |
| } |
| |
| InputStream data = parent.getResourceAsStream(name.replace('.', '/') |
| + ".class"); |
| byte[] buf = new byte[10240]; // big enough, too lazy to loop |
| int size; |
| try { |
| size = data.read(buf); |
| } catch (IOException e) { |
| throw new ClassNotFoundException(); |
| } |
| clazz = defineClass(name, buf, 0, size); |
| resolveClass(clazz); |
| return clazz; |
| } |
| |
| } |
| } |