Row level validations for JTable

Question

Is their a way to validate the row data of a editable JTable before moving out from that row, and if invalid data existings in that row then we need to display an error message and set the focus back to that row.
Basically the user should not be able to move out from that row until he enters valid data for the row.
I was able to do the validations at the cell level, by validating in the editor of that particular cell or in the SetValueAt() method. The reason i need the row level validations are for example if a required cell is left blank(if we don't tab into the cell then nor the editor is started nor the setValueAt() is called to do the validations) or if a cell's validation depends on the other cell's value in the same row.
I can over write the valueChanged() method of the Jtable itself to trap the row change event. But the valueChanged() method only does the repainting for the new selection, the selectedRow index is changed even before the valueChanged is called. So in the valueChanged() method the selectedRow index is the row to which u are moving into rather than the row from which u are moving out and this is the row u need validations for. ListSelectionEvent has two methods getFirstIndex() and getLastIndex(), one among these two will return the row number from which u are moving out from, so based on this i can validate the row iam moving out from and set the focus back to that row if invalid data exists.(The valueChanged event is fired again when u are resetting back the focus).
But the problem is when the row u are moving into and the row u are moving out from both have invalid data. Then it becomes an infinite loop as the valueChanged event is fired when u are setting back the focus.
Any Suggestions ?
Thanks

Answer 1

DrClap:
i need a editable JTable. so ur suggestion doesn't work.
Jaredth :
here is the code. I have over rided valueChanged method of JTable and called my validateRow in this method. I am just displaying a error msg for now, iam not setting the focus back to the row which has invalidate data. This code doestn't work for cases where when the row u are moving into and the row u are moving out from both have invalid data.
public void valueChanged(ListSelectionEvent e){
if( this.getSelectedRow() == -1) return;
if(!e.getValueIsAdjusting() ) {
int selRow = this.getSelectedRow();
int firstIndex = e.getFirstIndex();
int lastIndex = e.getLastIndex();
int rowToValidate = selRow == lastIndex ? firstIndex : lastIndex;
if( !isValidateRow( rowToValidate) ){
JOptionPane.showMessageDialog(null,"Invalid Data at row: "+rowToValidate,
"Row validation failed", JOptionPane.ERROR_MESSAGE);
return;
kenny_lee:
I have already done what u explained above. This works fine for cases where u need to validate individual cells in a row. But what happens when the validation of a cell in a row depends on the value in a different cell in the same row and for which u didn't enter any value yet. So in these cases u need to do the validation when u are moving out from the row. So i need to know is their a way to handle this in a efficient way? There is a way by over loading the valueChanged method of the JTable as mentioned above but it will not work for cases where the row u are moving into and the row u are moving out from both have invalid data.
Thanks for ur response.
Let me know if u find a solution to this problem