validating multiple field of a table in combination

[Steffen Neustadt]

Hello,
I have a table with several columns and wan't to validate the entries of two cells together (f.i. cell 1: start-time, cell 2: end-time--> validate that value of cell 1 is before value of cell 2). The problem for me is to specifie the cells, caues I only have one <ice:inputText> field in my jsf-file:

 
<ice:dataTable  id="table" ...>
        
       
        <ice:columns id="columns"  value="#{myBean.columnsModel}" var="table">                                        
            <ice:outputText id="out" value="#{myBean.cellValue}" rendered="#{weekHandler.notEditable}" style="color: red" converter="weekConverter"/>
            
 
<ice:inputText id="in" value="#{myBean.cellValue}" rendered="#{weekHandler.editable}"  style="color: blue" converter="weekConverter" valueChangeListener="#{weekHandler.entryChanged}" >
            <f:validator validatorId="weekValidator" />
            
            
            </ice:inputText>
            
           
            </ice:columns>
    </ice:dataTable>  

Tried to get a cell with findComponent() but can only get the current cell only...Any idea?