//////////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (c) 2014-present, Egret Technology.
//  All rights reserved.
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the Egret nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY EGRET AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
//  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
//  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
//  IN NO EVENT SHALL EGRET AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
//  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
//  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;LOSS OF USE, DATA,
//  OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
//  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
//  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
//  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//////////////////////////////////////////////////////////////////////////////////////


namespace egret {

    /**
     * @private
     */
    let getDefinitionByNameCache = {};

    /**
     * Returns a reference to the class object of the class specified by the name parameter.
     * @param name The name of a class.
     * @version Egret 2.4
     * @platform Web,Native
     * @includeExample egret/utils/getDefinitionByName.ts
     * @language en_US
     */
    /**
     * 返回 name 参数指定的类的类对象引用。
     * @param name 类的名称。
     * @version Egret 2.4
     * @platform Web,Native
     * @includeExample egret/utils/getDefinitionByName.ts
     * @language zh_CN
     */
    export function getDefinitionByName(name:string):any {
        if (!name)
            return null;
        let definition = getDefinitionByNameCache[name];
        if (definition) {
            return definition;
        }
        let paths = name.split(".");
        let length = paths.length;
        definition = __global;
        for (let i = 0; i < length; i++) {
            let path = paths[i];
            definition = definition[path];
            if (!definition) {
                return null;
            }
        }
        getDefinitionByNameCache[name] = definition;
        return definition;
    }

    if(DEBUG){
        egret["cleanCache"] = function():void{
            getDefinitionByNameCache = {};
        }
    }

}

let __global = this.__global || this;