How to get selected row of a datable in JSF1.2 using openfaces ?

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JSF

I used data table(OpenFaces) for selecting a row in data table using the attribute o:checkboxColumn rowDatas this will filter the selected rows only .

o:checkboxColumn rowDatas="#{tBean.srInventoryList}" sortable="true">

<f:facet name="header">
<o:selectAllCheckbox />
</f:facet>
</o:checkboxColumn>
When I click a button it displays all the list, but I want only other rows which are not selected whether any attributes for filter the row list