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
SWT.NONE,
					null );
			
			if ( item != null && item.length > 0 )
				availableDbObjectsTree.showItem( item[0] );
			
		}
		catch ( Exception e )
		{
			logger.log( Level.FINE, e.getMessage( ), e );
		}
	}
	/**
	 * @param dbtype
	 * @param procedureRs
	 * @return
	 */
	private boolean needToCreateProcedureNode( String dbtype,
			ArrayList procedureRs )
	{
		return procedureRs != null
				&& procedureRs.size( ) > 0
				&& ( DbType.ALL_STRING.equalsIgnoreCase( dbtype ) || DbType.PROCEDURE_STRING.equalsIgnoreCase( dbtype ) );
	}
	/**
	 * Connects the metadata provider to the specified data source
	 */
	protected Connection connectMetadataProvider( IMetaDataProvider metadata,
			DataSourceDesign dataSourceDesign )
	{