Java/Cycript.java

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 import java.lang.reflect.Field;
  23 import java.lang.reflect.InvocationHandler;
  24 import java.lang.reflect.Method;
  25 import java.lang.reflect.Proxy;
  26
  27 public class Cycript {
  28
  29 public static Method GetMethod(Class<?> type, String name, Class... types) {
  30     try {
  31         return type.getMethod(name, types);
  32     } catch (NoSuchMethodException e) {
  33         throw new RuntimeException();
  34     }
  35 }
  36
  37 public static final Method Object$equals = GetMethod(Object.class, "equals", Object.class);
  38 public static final Method Object$hashCode = GetMethod(Object.class, "hashCode");
  39
  40 public static native void delete(long protect);
  41
  42 public static native Object handle(long protect, String property, Object[] arguments)
  43     throws Throwable;
  44
  45 public static class Wrapper
  46     implements InvocationHandler
  47 {
  48     private long protect_;
  49
  50     public Wrapper(long protect) {
  51         protect_ = protect;
  52     }
  53
  54     protected void finalize()
  55         throws Throwable
  56     {
  57         delete(protect_);
  58     }
  59
  60     public long getProtect() {
  61         return protect_;
  62     }
  63
  64     public Object invoke(Object proxy, Method method, Object[] args)
  65         throws Throwable
  66     {
  67         if (false)
  68             return null;
  69         else if (method.equals(Object$equals))
  70             return proxy == args[0];
  71         else if (method == Object$hashCode)
  72             return System.identityHashCode(proxy);
  73         else
  74             return handle(protect_, method.getName(), args);
  75     }
  76 }
  77
  78 public static Object proxy(Class proxy, long protect) {
  79     return Proxy.newProxyInstance(proxy.getClassLoader(), new Class[] {proxy}, new Wrapper(protect));
  80 }
  81
  82 }