Bug 155365 Can not set data type to "date time" when editing "Data Item"
Description: Can not set data type to "date time" when editing "Data Item" Steps to reproduce: 1. Insert a data item to the layout 2. Name it and set the expression to "a = new Date()" 3. Select the data type to date time 4. Press ok Actual result: An Birt Exception is thrown out. Expected result: No NPE thrown out
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ColumnBindingDialog.java
if ( event.getElement( ) instanceof ComputedColumnHandle )
					{
						ComputedColumnHandle handle = (ComputedColumnHandle) event.getElement( );
						if ( handle.getName( ).equals( selectedColumnName ) )
						{
							selectedColumnName = null;
						}
						else
						{
							selectedColumnName = handle.getName( );
						}
						updateSelection( );
						updateButtons( );
					}
					else
					{
						( (CheckboxTableViewer) bindingTable ).setChecked( dummyChoice,
								false );
					}
				}
			} );
		}
		else
		{
			bindingTable = new TableViewer( table );
		}
		bindingTable.setCellEditors( cellEditors );
		bindingTable.setColumnProperties( columns );
		bindingTable.setContentProvider( contentProvider );
		bindingTable.setLabelProvider( labelProvider );