How to implement "Select all" on selectManyCheckbox - jsf

Question

I want to set checkboxes of a selectManyCheckbox to checked if a condition is true "#{myBean.isCondition}":
MyBean.java
public class MyBean{
private boolean isCondition;
...
public boolean isCondition{
return isCondition;
}
...
}
my_page.jspx :
<h:selectManyCheckbox
layout="pageDirection"
label="#{messages['numsTelephone.label']}"
value="#{listSelected}">
<s:selectItems var="clientTelephone"
value="#{list}"
label="#{clientTelephone}" />
</h:selectManyCheckbox>
I need to know if it exist something like
checked = "#{myBean.isCondition}"
that I can add in my selectManyCheckbox bloc ? Or should I use a javascript ?
Any other solution is welcome too.
My other question is how to set myBean.isCondition to true if a checkbox is selected ?
Thanks,

Answer 1

Use <f:ajax> in the "Select all" checkbox and do the selection job in the listener method and then re-render the checkboxes.
Kickoff example:
<h:form>
<h:selectBooleanCheckbox value="#{bean.selectAll}">
<f:ajax listener="#{bean.onSelectAll}" render="items" />
</h:selectBooleanCheckbox>
<h:selectManyCheckbox id="items" value="#{bean.selectedItems}">
<f:selectItems value="#{bean.availableItems}" />
</h:selectManyCheckbox>
</h:form>
#Named
#ViewScoped
public class Bean implements Serializable {
private boolean selectAll; // +getter +setter
private List<String> selectedItems; // +getter +setter
private Map<String, String> availableItems; // +getter (no setter necessary)
#PostConstruct
public void init() {
availableItems = new LinkedHashMap<String, String>();
availableItems.put("Foo label", "foo");
availableItems.put("Bar label", "bar");
availableItems.put("Baz label", "baz");
}
public void onSelectAll() {
selectedItems = selectAll ? new ArrayList<>(availableItems.values()) : null;
}
// ...
}