Android Open Source - bad Bad Collections

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License

The source code is released under:

Copyright (C) 2013 Madis Pink Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Softwa...

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Java Source Code

package com.madisp.bad.eval;
// w ww  .j  a  va2s  . c o m
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * Created with IntelliJ IDEA.
 * User: madis
 * Date: 3/23/13
 * Time: 10:19 PM
 */
@SuppressWarnings("unchecked")
public class BadCollections {

  private static final String[] COLLECTION_MUTATORS = {"add", "addAll", "clear", "remove", "removeAll"};
  private static final String[] LIST_MUTATORS = {"set"};

  private static Set<String> collectionMutators = new HashSet<String>();
  private static Set<String> listMutators = new HashSet<String>();

  static {
    for (String s : COLLECTION_MUTATORS) {
      collectionMutators.add(s);
      listMutators.add(s);
    }
    for (String s : LIST_MUTATORS) {
      listMutators.add(s);
    }
  }

  public static Object wrapCollection(final BadVar var, final Collection collection) {
    return Proxy.newProxyInstance(BadCollections.class.getClassLoader(), new Class[] {Collection.class}, new InvocationHandler() {
      @Override
      public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        Object ret = method.invoke(collection, args);
        if (collectionMutators.contains(method.getName())) {
          var.dispatchFire();
        }
        return ret;
      }
    });
  }

  public static Object wrapList(final BadVar var, final List list) {
    return Proxy.newProxyInstance(BadCollections.class.getClassLoader(), new Class[] {List.class}, new InvocationHandler() {
      @Override
      public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        Object ret = method.invoke(list, args);
        if (listMutators.contains(method.getName())) {
          var.dispatchFire();
        }
        return ret;
      }
    });
  }
}

Java Source Code List