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
userName,
				pass );
		metaData = jdbcConnection.getMetaData();
		
	}
        
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.data.oda.jdbc.ui.provider.IMetadataProvider#getCatalog()
	 */
	public String getCatalog( )
	{
		String cataLog = null;
		if ( jdbcConnection != null )
		{
			try
			{
				cataLog = jdbcConnection.getCatalog( );
			}
			catch ( SQLException e )
			{
				try
				{
					this.closeConnection( );
					this.resetMetadata( );
					cataLog = jdbcConnection.getCatalog( );
				}
				catch ( SQLException e1 )
				{