/* * Copyright (c) 2000, 2009, 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.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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 sun.nio.ch; import java.io.*;import java.lang.reflect.*;import java.security.AccessController;import java.security.PrivilegedAction;  class Reflect {                                 // package-private     private Reflect() { }     private static class ReflectionError extends Error {        private static final long serialVersionUID = -8659519328078164097L;        ReflectionError(Throwable x) {            super(x);        }    }     private static void setAccessible(final AccessibleObject ao) {        AccessController.doPrivileged(new PrivilegedAction<Void>() {                public Void run() {                    ao.setAccessible(true);                    return null;                }});    }     static Constructor lookupConstructor(String className,                                         Class[] paramTypes)    {        try {            Class<?> cl = Class.forName(className);            Constructor<?> c = cl.getDeclaredConstructor(paramTypes);            setAccessible(c);            return c;        } catch (ClassNotFoundException x) {            throw new ReflectionError(x);        } catch (NoSuchMethodException x) {            throw new ReflectionError(x);        }    }     static Object invoke(Constructor c, Object[] args) {        try {            return c.newInstance(args);        } catch (InstantiationException x) {            throw new ReflectionError(x);        } catch (IllegalAccessException x) {            throw new ReflectionError(x);        } catch (InvocationTargetException x) {            throw new ReflectionError(x);        }    }     static Method lookupMethod(String className,                               String methodName,                               Class... paramTypes)    {        try {            Class<?> cl = Class.forName(className);            Method m = cl.getDeclaredMethod(methodName, paramTypes);            setAccessible(m);            return m;        } catch (ClassNotFoundException x) {            throw new ReflectionError(x);        } catch (NoSuchMethodException x) {            throw new ReflectionError(x);        }    }     static Object invoke(Method m, Object ob, Object[] args) {        try {            return m.invoke(ob, args);        } catch (IllegalAccessException x) {            throw new ReflectionError(x);        } catch (InvocationTargetException x) {            throw new ReflectionError(x);        }    }     static Object invokeIO(Method m, Object ob, Object[] args)        throws IOException    {        try {            return m.invoke(ob, args);        } catch (IllegalAccessException x) {            throw new ReflectionError(x);        } catch (InvocationTargetException x) {            if (IOException.class.isInstance(x.getCause()))                throw (IOException)x.getCause();            throw new ReflectionError(x);        }    }     static Field lookupField(String className, String fieldName) {        try {            Class cl = Class.forName(className);            Field f = cl.getDeclaredField(fieldName);            setAccessible(f);            return f;        } catch (ClassNotFoundException x) {            throw new ReflectionError(x);        } catch (NoSuchFieldException x) {            throw new ReflectionError(x);        }    }     static Object get(Object ob, Field f) {        try {            return f.get(ob);        } catch (IllegalAccessException x) {            throw new ReflectionError(x);        }    }     static Object get(Field f) {        return get(null, f);    }     static void set(Object ob, Field f, Object val) {        try {            f.set(ob, val);        } catch (IllegalAccessException x) {            throw new ReflectionError(x);        }    }     static void setInt(Object ob, Field f, int val) {        try {            f.setInt(ob, val);        } catch (IllegalAccessException x) {            throw new ReflectionError(x);        }    }     static void setBoolean(Object ob, Field f, boolean val) {        try {            f.setBoolean(ob, val);        } catch (IllegalAccessException x) {            throw new ReflectionError(x);        }    } }