flex Validators

package com.wks.util
{
?import flash.events.Event;
?import flash.events.EventDispatcher;
?import flash.events.IEventDispatcher;
?
?import mx.core.IMXMLObject;
?import mx.events.FlexEvent;
?import mx.events.ValidationResultEvent;
?import mx.validators.ValidationResult;
?import mx.validators.Validator;
?
?
?/**
? * @description 验证器框架信息对象
? * ????用于对多个验证器进行综合统一验证，并返回验证结果
? */
?[DefaultProperty("validatorArray")]
?public class Validators extends EventDispatcher implements IMXMLObject
?{
??
??public static const VALID_CHANGEED_EVENT:String = "validChanged";
??
??/**
?? * 验证器框架对象编号
?? */
??public var id:String;
??
??/**
?? * 当前所属的页面文档信息
?? */
??public var document:Object;
??
??/**
?? * 强制验证的验证器数目
?? * 用于保存 required 值为真的验证器的数目
?? */
??private var _requiredNum:int;
??public function get requiredNum():int{
???_requiredNum = 0;
???if ( validatorArray ){
????for each( var v:Validator in validatorArray ){
?????if ( v.required ){
??????_requiredNum++;
?????}
????}
???}
???
???return _requiredNum;
??}
??
??/**
?? * 收到的 required 值为真的验证器数目。
?? */
??private var _requiredValidatedNum:int;
??public function get requiredValidatedNum():int{
???_requiredValidatedNum = 0;
???if ( results ){
????for each( var event:ValidationResultEvent in results ){
?????if ( event.currentTarget.required && event.type == ValidationResultEvent.VALID ){
??????_requiredValidatedNum++;
?????}
????}
???}
???
???return _requiredValidatedNum;
??}
??
??
??/**
?? * 强制验证标识
?? * 根据自身管理的验证器来决定自己的required属性值。
?? * 只要有一个验证器是强制验证的，该required值就是真，否则相反。
?? */
??private var _required:Boolean;
??public function get required():Boolean{
???return _required;
??}
??
??/**
?? * 验证结果标识
?? * true - 成功，false - 失败
?? */
??private var _valid:Boolean;
??[Bindable("validChanged")]
??public function get valid():Boolean{
???return _valid;
??}
??
??/**
?? * 验证结果数组
?? * 存储每个验证器的验证信息
?? */
??[ArrayType("mx.events.ValidationResultEvent")]
??public var results:Array;
??
??/**
?? * 验证器数组
?? */
??[ArrayType("mx.validators.Validator")]
??private var _validatorArray:Array;
??[Bindable]
??public function get validatorArray():Array{
???return _validatorArray;
??}
??public function set validatorArray(array:Array):void{
???if ( _validatorArray != null ){
????for each( var v:Validator in _validatorArray ){
?????v.removeEventListener(ValidationResultEvent.INVALID,resultHandler);
?????v.removeEventListener(ValidationResultEvent.VALID,resultHandler);
????}
???}
???
???_validatorArray = array;
???for each( var validator:Validator in _validatorArray ){
????validator.addEventListener(ValidationResultEvent.INVALID,resultHandler);
????validator.addEventListener(ValidationResultEvent.VALID,resultHandler);
????if ( this.trigger ) validator.trigger = this.trigger;
????if ( this.triggerEvent ) validator.triggerEvent = this.triggerEvent;

????if ( requiredNum == 0 ){ ?????_required = false; ?????_valid = true; ????} ???} ??} ?? ??/** ?? * 验证触发器 ?? */ ??private var _trigger:IEventDispatcher; ??public function get trigger():IEventDispatcher{ ???return _trigger; ??} ??public function set trigger(value:IEventDispatcher):void{ ???_trigger = value; ???if ( validatorArray ){ ????for each( var validator:Validator in validatorArray ){ ?????validator.trigger = _trigger; ????} ???} ??} ?? ??/** ?? * 验证触发事件类型 ?? */ ??private var _triggerEvent:String = FlexEvent.VALUE_COMMIT; ??public function get triggerEvent():String{ ???return _triggerEvent; ??} ??public function set triggerEvent(value:String):void{ ???_triggerEvent = value; ???if ( validatorArray ){ ????for each( var validator:Validator in validatorArray ){ ?????validator.triggerEvent = _triggerEvent; ????} ???} ??} ?? ??/** ?? * 构造函数 ?? * @param target ?? * @return ?? */ ??public function Validators(target:IEventDispatcher=null) ??{ ???super(target); ??} ?? ??/** ?? * 实现IMXMLObject ?? * @param document ?? * @param id ?? * @return ?? */ ??public function initialized(document:Object,id:String):void ??{ ???this.id = id; ???this.document = document; ??} ?? ??/** ?? * 验证器验证结果事件侦听处理函数 ?? * @param event 验证结果事件信息 ?? * @return ?? */ ??protected function resultHandler(event:ValidationResultEvent):void{ ???//更新框架验证结果数组 ???var alreadyIn:Boolean; ???if ( this.results == null ) { ????results = new Array(); ???} ??? ???for ( var i:int = 0; i < results.length; i++ ){ ????if ( results[i].currentTarget == event.currentTarget ){ ?????results[i] = event; ?????alreadyIn = true; ????} ???} ??? ???if ( !alreadyIn ){ ????results.push(event); ???} ??? ???//强制验证的验证器都验证过之后可以计算总体结果 ???if ( requiredValidatedNum == requiredNum ){ ????var wholeValid:Boolean = true; ????for ( var j:int = 0; j < results.length; j++ ){ ?????var isValid:Boolean = results[j].type == ValidationResultEvent.VALID; ?????wholeValid = wholeValid && isValid; ????} ????if ( valid != wholeValid ){ ?????this._valid = wholeValid; ?????dispatchEvent(new Event(VALID_CHANGEED_EVENT)); ????} ????if ( valid ){ ?????dispatchEvent(new ValidationResultEvent(ValidationResultEvent.VALID)); ????} else { ?????dispatchEvent(new ValidationResultEvent(ValidationResultEvent.INVALID)); ????} ???} else { ????if ( valid ){ ?????_valid = !valid; ?????dispatchEvent(new Event(VALID_CHANGEED_EVENT)); ????} ???} ??} ?? ??/** ?? * 清空错误信息 ?? * @return ?? */ ??public function clearErrorMessages():void{ ???if ( results ){ ????for each( var vre:ValidationResultEvent in results ){ ?????if ( vre.type == ValidationResultEvent.INVALID ){ ??????if ( vre.currentTarget is Validator ){ ???????vre.results = null; ???????if ( vre.currentTarget.listener ){ ????????vre.currentTarget.listener.errorString = null ???????} else if ( vre.currentTarget.source ){ ????????vre.currentTarget.source.errorString = null; ???????} ??????} else if ( vre.currentTarget is Validators ){ ???????(vre.currentTarget as Validators).clearErrorMessages(); ??????} ?????} ????} ???} ??} ?? ??/** ?? * 校验所有的验证器 ?? * @return ?? */ ??public function validate():void{ ???if ( validatorArray ){ ????for each( var validator:Validator in validatorArray ){ ?????validator.validate(); ????} ???} ??} ?} }