Package io.deephaven.api.agg.spec

Class AggSpecFirst

java.lang.Object

io.deephaven.api.agg.spec.AggSpecBase

io.deephaven.api.agg.spec.AggSpecEmptyBase

io.deephaven.api.agg.spec.AggSpecFirst

All Implemented Interfaces:

AggSpec

@Immutable
public abstract class AggSpecFirst
extends AggSpecEmptyBase

Specifies an aggregation that outputs the first value in the input column for each group.

See Also:

• TableOperations.firstBy()

Nested Class Summary

Nested classes/interfaces inherited from interface io.deephaven.api.agg.spec.AggSpec

AggSpec.Visitor

Constructor Summary

Constructors

Constructor	Description
AggSpecFirst()

Method Summary

Modifier and Type	Method	Description
final String	description()	Get a simple description for this AggSpec.
static AggSpecFirst	of()
final <V extends AggSpec.Visitor> V	walk(V visitor)	Glue method to deliver this AggSpec to a AggSpec.Visitor.

Methods inherited from class io.deephaven.api.agg.spec.AggSpecBase

aggregation, aggregation, aggregation

Methods inherited from class java.lang.Object

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

Constructor Details

AggSpecFirst

public AggSpecFirst()

Method Details

of

public static AggSpecFirst of()

description

public final String description()

Description copied from interface: AggSpec

Get a simple description for this AggSpec.

Returns:

The description

walk

public final <V extends AggSpec.Visitor> V walk(V visitor)

Description copied from interface: AggSpec

Glue method to deliver this AggSpec to a AggSpec.Visitor.

Parameters:

visitor - The visitor

Returns:

The visitor