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
setSashFormWeights( SashForm );
		return SashForm;
	}
	/**
	 * Initialize image property
	 * 
	 */
	private void initialImage( )
	{
		tableImage = JFaceResources.getImage( TABLE_ICON );
		viewImage = JFaceResources.getImage( VIEW_ICON );
		schemaImage = JFaceResources.getImage( SCHEMA_ICON );
		dataBaseImage = JFaceResources.getImage( DATABASE_ICON );
		columnImage = JFaceResources.getImage( COLUMN_ICON );
	}
	/**
	 *  Initializes the Jdbc related information , used  by this page
	 * ( such as the Jdbc Connection , Catalog Name etc )
	 *
	 */
	protected void initialJdbcInfo( )
	{
		createMetaDataProvider( );
		jdbcConnection = connectMetadataProvider( metaDataProvider,
				this.getDataSetDesign( ).getDataSourceDesign( ) );
		try
		{
			if ( jdbcConnection != null )
			{