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	下面的代碼表現出使用set 帶來的好處。
          ??1public?class?TaskTemplate?{
          ??2????private?String?id;
          ??3????private?String?title;
          ??4????private?String?detail;
          ??5????
          ??6????private?Set<TaskTemplate>?preconditions;
          ??7????private?Set<TaskTemplate>?subTasks;
          ??8????
          ??9????//?Temporary?used?for?create?task.?don't?persistent.
          ?10????
          ?11????private?Task?createdTask;?
          ?12????public?String?getDetail()?{
          ?13????????return?detail;
          ?14????}
          ?15????public?void?setDetail(String?detail)?{
          ?16????????this.detail?=?detail;
          ?17????}
          ?18????public?String?getId()?{
          ?19????????return?id;
          ?20????}
          ?21????public?void?setId(String?id)?{
          ?22????????this.id?=?id;
          ?23????}
          ?24????public?Set<TaskTemplate>?getPreconditions()?{
          ?25????????if?(preconditions?==?null)?{
          ?26????????????preconditions?=?new?HashSet<TaskTemplate>?();
          ?27????????}
          ?28????????return?preconditions;
          ?29????}
          ?30????public?void?setPreconditions(Set<TaskTemplate>?preconditions)?{
          ?31????????this.preconditions?=?preconditions;
          ?32????}
          ?33????public?Set<TaskTemplate>?getSubTasks()?{
          ?34????????if?(subTasks?==?null)?
          ?35????????????subTasks?=?new?HashSet<TaskTemplate>();
          ?36????????return?subTasks;
          ?37????}
          ?38????public?void?setSubTasks(Set<TaskTemplate>?subTasks)?{
          ?39????????this.subTasks?=?subTasks;
          ?40????}
          ?41????public?String?getTitle()?{
          ?42????????return?title;
          ?43????}
          ?44????public?void?setTitle(String?title)?{
          ?45????????this.title?=?title;
          ?46????}
          ?47????
          ?48????public?Task?getCreatedTask()?{
          ?49????????return?createdTask;
          ?50????}
          ?51
          ?52????/**
          ?53?????*?@param?subTemplate
          ?54?????*/
          ?55????public?void?addSubTaskTemplate(TaskTemplate?subTemplate)?{
          ?56????????getSubTasks().add?(subTemplate);
          ?57????????
          ?58????}
          ?59????
          ?60????/**
          ?61?????*?@param?subTemplate
          ?62?????*/
          ?63????public?void?addPrecondition(TaskTemplate?subTemplate)?{
          ?64????????getPreconditions().add?(subTemplate);
          ?65????}
          ?66????
          ?67????/**
          ?68?????*?
          ?69?????*/
          ?70????private?void?fillPreconitionAfterCreateTask()?{
          ?71????????if?(createdTask?==?null)
          ?72????????????return;
          ?73????????
          ?74????????for?(TaskTemplate?template?:?getPreconditions?())?{
          ?75????????????createdTask.addPrecondition?(template.getCreatedTask?());
          ?76????????}
          ?77????????
          ?78????????for?(TaskTemplate?subTemplate?:?getSubTasks?())?{
          ?79????????????subTemplate.fillPreconitionAfterCreateTask();
          ?80????????}
          ?81????}
          ?82????
          ?83????/**
          ?84?????*?@return
          ?85?????*/
          ?86????private?Task?createTask()?{
          ?87????????Task?task?=?new?Task?();
          ?88????????task.setTitle(title);
          ?89????????task.setDetail?(detail);
          ?90????????for?(TaskTemplate?subTaskTemplate:?getSubTasks?())?{
          ?91????????????task.addSubTask?(subTaskTemplate.createTask());
          ?92????????}
          ?93????????createdTask?=?task;
          ?94????????return?task;
          ?95????}
          ?96????
          ?97????/**
          ?98?????*?@param?template
          ?99?????*?@return
          100?????*?This?method?should?be?in?TaskServiceImpl,?the?complete?implementation?should?be?
          101?????*?public?Task?createTaskFromTemplate?(String?templateId)?{
          102?????*??????TaskTemplate?template?=?(TaskTemplate)?findByPrimaryKey?(templateId,?TaskTemplate.class);
          103?????*??????Task?task?=?template.createTask?();
          104?????*??????template.fillPreconditionAfterCreateTask();
          105?????*??????insert?(task);
          106?????*??????return?task;
          107?????*?}
          108?????*?
          109?????*/
          110????public?static?Task?createTaskFromTemplate(TaskTemplate?template)?{
          111????????Task?task?=?template.createTask?();
          112????????template.fillPreconitionAfterCreateTask?();
          113????????return?task;
          114????}
          115
          116
          117}
          
	
          posted on 2006-12-01 10:25 黑咖啡 閱讀(367) 評論(0)  編輯  收藏  所屬分類: Coding Review 
          

          







          
	    
    




          





          


          

	
          
		
          
				
		
	
		
          
		
		
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