如何爲多個對象使用一個對象池

Question

這是我在網上找到並使用的一個示例（我是對象池的新手）。它適用於單個對象類型但不允許我創建不同對象池

程序包 import starling.display.DisplayObject;

public class SpritePool 
{ 
    private var pool:Array; 
    private var counter:int; 

    public function SpritePool(type:Class, len:int) 
    { 
     pool = new Array(); 
     counter = len; 

     var i:int = len; 
     while(--i > -1) 
      pool[i] = new type(); 
    } 

    public function getSprite():DisplayObject 
    { 
     if(counter > 0) 
      return pool[--counter]; 
     else 
      throw new Error("You exhausted the pool!"); 
    } 

    public function returnSprite(s:DisplayObject):void 
    { 
     pool[counter++] = s; 
    } 
} 

}

Answer 1

這裏是對象池的沒有對象計數限制的例子。

import flash.utils.Dictionary; 
import flash.utils.getDefinitionByName; 
import flash.utils.getQualifiedClassName; 

public class ObjectPool { 

    public function ObjectPool() 
    { 
     throw new Error("don't create instance"); 
    } 

    private static const objectDict:Dictionary = new Dictionary(); 

    public static function getObject(c:Class):Object{ 

     //if you want add a object count limit,try to check the count here 
     if (objectDict[c] == null) { 
      objectDict[c] = []; 
     } 

     var t:Array = objectDict[c] as Array; 

     if (t.length > 0) { 
      return t.shift(); 
     } else { 
      return new c(); 
     } 
    } 

    public static function putObject(obj:Object):void { 

     var c:Class = Class(getDefinitionByName(getQualifiedClassName(obj))); 

     if (objectDict[c] == null) { 
      return; 
     } 

     var t:Array = objectDict[c] as Array; 

     if (t && t.indexOf(obj) == -1) { 
      t.push(obj); 
     } 
    } 

}