uk.ac.starlink.ttools.task

Class ArrayJoin

java.lang.Object

uk.ac.starlink.ttools.task.ConsumerTask

uk.ac.starlink.ttools.task.SingleMapperTask

uk.ac.starlink.ttools.task.ArrayJoin

All Implemented Interfaces:

Task

public class ArrayJoin
extends SingleMapperTask

Task to add the contents of an external table for each row of an input table as array-valued columns.

Since:

17 Jun 2022

Author:

Mark Taylor

Constructor Summary

Constructors

Constructor and Description
ArrayJoin() Constructor.

Method Summary

Modifier and Type	Method and Description
TableProducer	createProducer(Environment env) Returns an object which can produce the effective output table which will be consumed by this task.
Parameter<?>[]	getParameters() Returns the list of parameters which may be used by this task.

Methods inherited from class uk.ac.starlink.ttools.task.SingleMapperTask

createInputProducer, getInputFilterParameter, getInputTableParameter

Methods inherited from class uk.ac.starlink.ttools.task.ConsumerTask

createExecutable, createProducer, getIdentity, getOutputMode, getParameterList, getPurpose

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ArrayJoin

public ArrayJoin()

Constructor.

Method Detail

getParameters

public Parameter<?>[] getParameters()

Description copied from interface: Task

Returns the list of parameters which may be used by this task.

Specified by:

getParameters in interface Task

Overrides:

getParameters in class ConsumerTask

Returns:

an array of the Parameter objects this task may request values for during its invocation

createProducer

public TableProducer createProducer(Environment env)
                             throws TaskException

Description copied from class: ConsumerTask

Returns an object which can produce the effective output table which will be consumed by this task. The table produced by the resulting producer can be fed to the ConsumerTask.getIdentity(uk.ac.starlink.table.StarTable) method.

Specified by:

createProducer in class ConsumerTask

Parameters:

env - execution environment

Returns:

table producer

Throws:

TaskException