Set default value for h:selectManyCheckbox

[Wolfgang]

Hi,

how can I set the default behaviour for each checkbox to "clicked"?
 <h:selectManyCheckbox value="#{homePage.selectedServices}" 
layout="pageDirection">
      <f:selectItem itemLabel="A"    itemValue="a"/>
      <f:selectItem itemLabel="B"    itemValue="b"/>
      <f:selectItem itemLabel="C"    itemValue="c"/>
      <f:selectItem itemLabel="D"    itemValue="d"/>
  </h:selectManyCheckbox>

I managed it with the h:selectOneRadio group:

<h:selectOneRadio id="radio" value="#{dataset.type}">
          <f:selectItem itemLabel="Accessions" itemValue="0"/>
          <f:selectItem itemLabel="Sequences" itemValue="1"/>
      </h:selectOneRadio>

  <managed-property>
          <property-name>type</property-name>
          <value>0</value>
      </managed-property>
 But there the property-name is a String and in the above example I 
have a list.
So I don't know how to set all these checkboxes clicked as default 
behaviour.

Cheers,
Wolfgang