Package uk.ac.starlink.ttools.task
Class ColumnSelectionMapper
- java.lang.Object
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- uk.ac.starlink.ttools.task.ColumnSelectionMapper
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- All Implemented Interfaces:
TableMapper
public class ColumnSelectionMapper extends java.lang.Object implements TableMapper
Mapper which operates on a user-supplied selection of the columns of the input table.- Since:
- 9 May 2006
- Author:
- Mark Taylor
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Constructor Summary
Constructors Constructor Description ColumnSelectionMapper()
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description TableMapping
createMapping(uk.ac.starlink.task.Environment env, int nin)
Creates a new mapping object, using a given execution environment for any additional required state.WordsParameter
getColumnsParameter()
Returns the parameter which specifies the column IDs for use.uk.ac.starlink.task.Parameter[]
getParameters()
Returns the parameters defined by this mapper.
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Method Detail
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getParameters
public uk.ac.starlink.task.Parameter[] getParameters()
Description copied from interface:TableMapper
Returns the parameters defined by this mapper.- Specified by:
getParameters
in interfaceTableMapper
- Returns:
- parameter array
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createMapping
public TableMapping createMapping(uk.ac.starlink.task.Environment env, int nin) throws uk.ac.starlink.task.TaskException
Description copied from interface:TableMapper
Creates a new mapping object, using a given execution environment for any additional required state.- Specified by:
createMapping
in interfaceTableMapper
- Parameters:
env
- execution environmentnin
- number of input tables that the mapping will operate on if known; -1 if not- Throws:
uk.ac.starlink.task.TaskException
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getColumnsParameter
public WordsParameter getColumnsParameter()
Returns the parameter which specifies the column IDs for use.- Returns:
- column list parameter
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