Package io.deephaven.api.agg.spec

Class AggSpecSortedFirst

java.lang.Object

io.deephaven.api.agg.spec.AggSpecBase

io.deephaven.api.agg.spec.AggSpecSortedFirst

All Implemented Interfaces:

AggSpec

@Immutable
public abstract class AggSpecSortedFirst
extends AggSpecBase

Specifies an aggregation that outputs the first value in the input column for each group, after sorting the group on the sort columns.

See Also:

• SortedFirst / SortedLast aggregations with sort direction

ImplNote:

The sorted-first aggregation only supports SortColumn.Order.ASCENDING columns at the moment.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	AggSpecSortedFirst.Builder

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

AggSpec.Visitor

Constructor Summary

Constructors

Constructor	Description
AggSpecSortedFirst()

Method Summary

Modifier and Type	Method	Description
static AggSpecSortedFirst.Builder	builder()
abstract List<SortColumn>	columns()	The columns to sort on to determine the order within each group.
final String	description()	Get a simple description for this AggSpec.
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

AggSpecSortedFirst

public AggSpecSortedFirst()

Method Details

builder

public static AggSpecSortedFirst.Builder builder()

description

public final String description()

Description copied from interface: AggSpec

Get a simple description for this AggSpec.

Returns:

The description

columns

public abstract List<SortColumn> columns()

The columns to sort on to determine the order within each group.

Returns:

The sort columns

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