LuaState 集合维护有问题，当有多个LuaState，关闭再创建的时候会有问题

[xiaoyaofeng]

LuaStateFactory.java update

/*

• $Id: LuaStateFactory.java,v 1.4 2006/12/22 14:06:40 thiago Exp $
• Copyright (C) 2003-2007 Kepler Project.
  *
• 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 Software without restriction, including
• without limitation the rights to use, copy, modify, merge, publish,
• distribute, sublicense, and/or sell copies of the Software, and to
• permit persons to whom the Software is furnished to do so, subject to
• the following conditions:
  *
• The above copyright notice and this permission notice shall be
• included in all copies or substantial portions of the Software.
  *
• THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
• EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
• MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
• IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
• CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
• TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
• SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */

package org.keplerproject.luajava;

import java.util.ArrayList;
import java.util.List;

/**

• This class is responsible for instantiating new LuaStates.

• When a new LuaState is instantiated it is put into a List

• and an index is returned. This index is registred in Lua

• and it is used to find the right LuaState when lua calls

• a Java Function.

• @author Thiago Ponte
  /
  public final class LuaStateFactory
  {
  /*

  • Array with all luaState's instances
    */
    private static final List states = new ArrayList();

  /**

  • Non-public constructor.
    */
    private LuaStateFactory()
    {}

  /**

  • Method that creates a new instance of LuaState

  • @return LuaState
    */
    public synchronized static LuaState newLuaState()
    {
    int idx = getNextStateIndex();
    LuaState L = new LuaState(idx);

    int size = states.size();
    if (idx>=size ) {//当集合为空的时候 i== 0 && size == 0
    states.add(idx, L);
    }else if (idx<size && idx >= 0) {//当集合的
    states.set(idx, L) ;
    } else {
    //异常情况
    }
    return L;
    }

  /**

  • Returns a existing instance of LuaState
  • @param index
  • @return LuaState
    */
    public synchronized static LuaState getExistingState(int index)
    {
    return (LuaState) states.get(index);
    }

  /**

  • Receives a existing LuaState and checks if it exists in the states list.

  • If it doesn't exist adds it to the list.

  • @param L

  • @return int
    */
    public synchronized static int insertLuaState(LuaState L)
    {
    int idx;
    for (idx = 0 ; idx < states.size() ; idx++)
    {
    LuaState state = (LuaState) states.get(idx);

    if (state != null)
    {
        if (state.getCPtrPeer() == L.getCPtrPeer())
            return idx;
    }
    

    }

    idx = getNextStateIndex();

    int size = states.size();
    if (idx>=size ) {//当集合为空的时候 i== 0 && size == 0
    states.add(idx, L);
    }else if (idx<size && idx >= 0) {//
    states.set(idx, L) ;
    } else {
    //异常情况
    }

    return idx;
    }

  /**

  • removes the luaState from the states list
  • @param idx
    */
    public synchronized static void removeLuaState(int idx)
    {
    int size = states.size();
    if (idx<size) {
    states.set(idx, null);
    }else {
    states.add(idx, null);
    }
    }

  /**

  • Get next available index

  • @return int
    */
    private synchronized static int getNextStateIndex()
    {
    int i;
    for ( i=0 ; i < states.size() && states.get(i) != null ; i++ );

    return i;
    }
    }