/* Cycript - The Truly Universal Scripting Language
 * Copyright (C) 2009-2016 Jay Freeman (saurik)
*/

/* GNU Affero General Public License, Version 3 {{{ */
/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * This program 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 Affero General Public License for more details.

 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
**/
/* }}} */

import java.lang.reflect.Field;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class Cycript {

public static Method GetMethod(Class<?> type, String name, Class... types) {
 try {
 return type.getMethod(name, types);
 } catch (NoSuchMethodException e) {
 throw new RuntimeException();
 }
}

public static final Method Object$equals = GetMethod(Object.class, "equals", Object.class);
public static final Method Object$hashCode = GetMethod(Object.class, "hashCode");

public static native void delete(long protect);

public static native Object handle(long protect, String property, Object[] arguments)
 throws Throwable;

public static class Wrapper
 extends RuntimeException
 implements InvocationHandler
{
 private long protect_;

 public Wrapper(long protect) {
 protect_ = protect;
 }

 protected void finalize()
 throws Throwable
 {
 delete(protect_);
 }

 public long getProtect() {
 return protect_;
 }

 public Object call(String property, Object[] arguments) {
 try {
 return handle(protect_, property, arguments);
 } catch (Throwable throwable) {
 return new RuntimeException(throwable);
 }
 }

 public String toString() {
 return call("toString", null).toString();
 }

 public Object invoke(Object proxy, Method method, Object[] args)
 throws Throwable
 {
 if (false)
 return null;
 else if (method.equals(Object$equals))
 // XXX: this assumes there is only one proxy
 return proxy == args[0];
 else if (method == Object$hashCode)
 // XXX: this assumes there is only one wrapper
 return hashCode();
 else
 return handle(protect_, method.getName(), args);
 }
}

public static Object proxy(Class proxy, Wrapper wrapper) {
 return Proxy.newProxyInstance(proxy.getClassLoader(), new Class[] {proxy}, wrapper);
}

}