Bug 199021 Error message pops up several times when click an invalid dataset
Description: There is a sqlserver datasource and dataset, remove the jtds driver to let the dataset invalid. Double click on the dataset, the error message will pop up serveral times. Build version:2.2.0.v20070807-0630 Steps to reproduce: 1. Create a sqlserver datasource and dataset. 2. Remove the jtds driver, and the dataset will be invalid. 3. Double click on the dataset. Expect result: Error message pops up once to indicate the problem. Actual result: Error message pops up serveral times.
data/org.eclipse.birt.report.data.oda.jdbc.ui/src/org/eclipse/birt/report/data/oda/jdbc/ui/editors/SQLDataSetEditorPage.java
{
						data += SQLUtility.getDnDString( ( (DbObject) obj ).getName( ),
								identifierQuoteString,
								identifierQuoteStringCheckBox.getSelection( ) );
					}
				}
				
				else if ( obj instanceof Procedure )
				{
					data += SQLUtility.getDnDString( ( (Procedure) obj ).getProcedureNameWithSchema( ),
							identifierQuoteString,
							identifierQuoteStringCheckBox.getSelection( ) );
				}
				
				else if ( obj instanceof ProcedureParameter )
				{
					continue;
				}
				
				else
				{
					data += SQLUtility.getDnDString( obj,
							identifierQuoteString,
							identifierQuoteStringCheckBox.getSelection( ) );
				}
				data += i != selection.length - 1 ? "," : "";
			}
			event.data = data;
		}
	}