Editing selcted checkboxes in JSF when using h:dataTable

Question

I have a few records coming in from the Database which are displayed with checkboxes . The JSP code for them is as follows
<h:dataTable value="#{InvestigationDefendantView.investDefsFindingsModel}" var="def" border="0" >
<h:column>
<h:selectManyCheckbox value="#{InvestigationDefendantView.addtype1}" disabled="false">
<f:selectItem itemValue="Current" itemLabel="Current"/>
<f:selectItem itemValue="Mailing" itemLabel="Mailing"/>
<f:selectItem itemValue="Posible" itemLabel="Posible"/>
<j4j:idProxy id="DefAddTypeProxy"/>
</h:selectManyCheckbox>
</h:column>
</h:dataTable>***********************************************8
The View class has this get method
======================================
public String[] getAddtype1()
Logger.info(this, "addtype testing", this.faddType.size());
if (this.faddType.size() > 0 )
ArrayList<String> alcb = new ArrayList<String>();
for (int i = 0; i < this.faddType.size(); i++)
alcb.add(this.faddType.get(i));
String[] tempArr = new String[alcb.size()];
for (int i = 0; i < alcb.size(); i++)
tempArr[i] = alcb.get(i).intern();
return tempArr;
return new String[0];
}===========================================================
Now when i edit , It shows all the checkBoxes for a perticuler type (e.g. current ) selected even if one of them was selected while adding the record since the h:datatable runs a loop for all the records in a row and my getaddtype1 shows gets called every time and the value faddType.size() is reset every time this method is called .
What i want to do is show only those records checked which were selected while adding . please help me in solving the issue

Answer 1

You need to bind the input values of each row to the row object behind the 'var' attribute of the h:dataTable.
Also see this article how to use datatables: [http://balusc.blogspot.com/2006/06/using-datatables.html].