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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(365) 評論(0)  編輯  收藏  所屬分類: Coding Review 
    

    







    
	    
    




    





    


    

	
    
		
    
				
		
	
		
    
		
		
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