Bug 136815 Provide convenience methods to access ODA data provider info
Provide additional convenience (short-cut) methods to access ODA data provider info. This helps to make it easier for an ODA consumer application to access related info through encapsulated methods.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/odaconsumer/Driver.java
IDriver getDriverHelper() throws DataException
	{	
		final String methodName = "getDriverHelper";
		if( m_driverHelper != null )
            return m_driverHelper;
        
		try
		{		
            m_driverHelper = new OdaDriver( getExtensionConfig() );
            return m_driverHelper;
		}
		catch( OdaException ex )
		{
			sm_logger.logp( Level.SEVERE, sm_className, methodName,
					"Cannot get ODA data source driver helper.", ex );
			throw new DataException( ResourceConstants.INIT_ENTRY_CANNOT_BE_FOUND, ex, 
                                     new Object[] { m_dataSourceDriverId } );
		}
		catch( UnsupportedOperationException ex )
		{
			sm_logger.logp( Level.SEVERE, sm_className, methodName,
					"Cannot get ODA data source driver factory.", ex );
			throw new DataException( ResourceConstants.INIT_ENTRY_CANNOT_BE_FOUND, ex, 
                                     new Object[] { m_dataSourceDriverId } );
		}
	}
	 
	
	int getTypeMapping( String dataSetType, int nativeType ) throws DataException