ObjectOutputStream oos = new ObjectOutputStream( writer
DataOutputStream dos = new DataOutputStream( writer
	private void storeDteMetaInfo( )	{		try		{			ObjectOutputStream oos = new ObjectOutputStream( writer					.createRandomAccessStream( DATA_META_STREAM ) );			oos.writeObject( mapQueryIDToResultSetIDs );			oos.writeObject( queryResultRelations );			oos.writeObject( queryExpressionIDs );			oos.close( );		}		catch ( IOException e )		{			e.printStackTrace( );		}	}