How to use HashMap in <s:selectItems> ?

[chwang.chaohua_wang.yahoo.com]

Hi Folks,

I have a eamilBean, this is a javebean.
it has an arrtibute:

public HashMap<String, Boolean> getTaskTypes(){
           return this.taskTypes;
}
     
public void setTaskTypes(HashMap<String, Boolean> taskTypes){
           this.taskTypes = taskTypes;
          
}

I have another calls file called: EmailManagerAction.java.
which has a method:
public HashMap<String, Boolean> getTaskTypes()


The following is part of email.jsp file.

         <h:selectManyCheckbox
                     id="taskTypes"
                      layout="pageDirection"
                      value="#{emailBean.taskTypes}">          
                 <s:selectItems value="#{emailManager.taskTypes}"  var="i" label="#{i}"/>
          </h:selectManyCheckbox>
     <h:messages/>

But when submit acction:

I got this error message:

sourceId=em:taskTypes[severity=(ERROR 2), summary=(Conversion Error setting value 'true' for '#{emailBean.taskTypes}'. ), detail=(Conversion Error setting value 'true true' for '#{emailBean.taskT
ypes}'. )]

I am not sure reason why, do i need to do some convert?

Please help, Thank you very much

Chwang