/*
* 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);
}
}
}