Seam and JSF: How to post multiple values instead of single

We have this ui:repeat:

<ui:repeat value="#{notAssigned}" var="pair">
   #{pair.data.processName}<br/>
   <s:button value="assign" action="#{mypage.assign}">
        <f:param name="taskId" valu开发者_如何学运维e="#{pair.task.id}"/>
   </s:button>
</ui:repeat>

Now I can assign one and one elements but pushing the assign button. But I want to refactor this and add a checkbox, so that you can choose all that you want to assign, and then push one button that will assign all.

How can I modify this code to support checkbox that contains the taskId (which is a Long) and one button to submit.

UPDATE

I tried changing the code to use <h:selectManyCheckbox>

<h:selectManyCheckbox value="#{mypage.notAssignedTaskIds}">
    <f:selectItem itemValue="#{pair.task.id}" itemLabel="#{messages['choose']}" />
</h:selectManyCheckbox>
#{pair.data.processName}


<h:commandButton action="#{mypage.test}" value="Assign"/>

And in my bean:

@Setter @Getter
List<String> notAssignedTaskIds = new ArrayList<String>();

public void test() {
    log.info("Inside test, size of list #0", notAssignedTaskIds.size());
    for(String id : notAssignedTaskIds) {
        log.info("TaskId's chosen #0", id);
    }
}

But notAssignedTaskids is always empty

My suggestion is, create a boolean flag in pair object. Then

<a:region>

    <ui:repeat value="#{notAssigned}" var="pair">
        <h:selectBooleanCheckbox value="#{pair.booleanFlag}">

        #{pair.data.processName}
    </ui:repeat>

    <a:commandLink action="#{yourBean.assignAll()}" value="assignAll">
    </a:commandLink>

</a:region>

In your bean, iterate over notAssigned list.

public void assignAll() {
.
.
.
    for (Pair pair : notAssigned) {
        if (pair.booleanFlag) {
            mypage.assign(pair);
        }
    }


}

And modify your assign method to get a pair object. By the way you can do it without ajax support. Just remove region and convert your a:commandLink to h:commandLink.

If you don't want to alter your model, then add a Map<Long, Boolean> to your bean.

private Map<Long, Boolean> selectedIds = new HashMap<Long, Boolean>();

Bind it to <h:selectBooleanCheckbox> value with task ID as key.

<ui:repeat value="#{bean.notAssigned}" var="pair">
    <h:selectBooleanCheckbok value="#{bean.selectedIds[pair.task.id]}" />
    #{pair.data.processName}
</ui:repeat>
<s:button value="assign" action="#{bean.assign}" />

Collect the selected values in assign() method.

List<Pair> selectedPairs = new ArrayList<Pair>();
for (Pair pair : notAssigned) {
    if (selectedIds.get(pair.getTask().getId())) {
        selectedPairs.add(pair);
    }
}    

I reckon you want a h:selectManyCheckbox element. Check out the docs here.