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	/*
	* Copyright (c) 2000, 2021, 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 {
	@java.io.Serial
	private static final long serialVersionUID = -8659519328078164097L;
	ReflectionError(Throwable x) {
	super(x);
	}
	}

	@SuppressWarnings("removal")
	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 \| NoSuchMethodException x) {
	throw new ReflectionError(x);
	}
	}

	static Object invoke(Constructor<?> c, Object[] args) {
	try {
	return c.newInstance(args);
	} catch (InstantiationException \|
	IllegalAccessException \|
	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 \| NoSuchMethodException x) {
	throw new ReflectionError(x);
	}
	}

	static Object invoke(Method m, Object ob, Object[] args) {
	try {
	return m.invoke(ob, args);
	} catch (IllegalAccessException \| 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 \| 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);
	}
	}

	}

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