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/provider/JdbcMetaDataProvider.java
String.valueOf( arguments[1] ),
					String.valueOf( arguments[2] ) );
		}
		else if ( name.equalsIgnoreCase( "PROCEDURE_COLUMNS" ) )
		{
			return metaData.getProcedureColumns( String.valueOf( arguments[0] ),
					String.valueOf( arguments[1] ),
					String.valueOf( arguments[2] ),
					String.valueOf( arguments[3] ) );
		}
		else if ( name.equalsIgnoreCase( "TABLE_COLUMNS" ) )
		{
			return metaData.getColumns( String.valueOf( arguments[0] ),
					String.valueOf( arguments[1] ),
					String.valueOf( arguments[2] ),
					String.valueOf( arguments[3] ) );
		}
		else if ( name.equalsIgnoreCase( "CROSSREFERENCE" ) )
		{
			return metaData.getCrossReference( String.valueOf( arguments[0] ),
					String.valueOf( arguments[1] ),
					String.valueOf( arguments[2] ),
					String.valueOf( arguments[3] ),
					String.valueOf( arguments[4] ),
					String.valueOf( arguments[5] ) );
		}
		return null;
	}
}