uk.ac.starlink.ttools.task

Interface TableMapper

All Known Implementing Classes:

CatMapper, ColumnSelectionMapper, JoinMapper, Match2Mapper, MatchMapper, SkyMatch2Mapper, TapMapper

public interface TableMapper

Interface for an operation which takes zero or more tables as input and produces one table as output.

Since:

9 Aug 2005

Author:

Mark Taylor

Method Summary

Modifier and Type	Method and Description
TableMapping	createMapping(Environment env, int nin) Creates a new mapping object, using a given execution environment for any additional required state.
Parameter<?>[]	getParameters() Returns the parameters defined by this mapper.

Method Detail

getParameters

Parameter<?>[] getParameters()

Returns the parameters defined by this mapper.

Returns:

parameter array

createMapping

TableMapping createMapping(Environment env,
                           int nin)
                    throws TaskException

Creates a new mapping object, using a given execution environment for any additional required state.

Parameters:

env - execution environment

nin - number of input tables that the mapping will operate on if known; -1 if not

Throws:

TaskException