org.openjdk.jmc.flightrecorder.rules.jdk.util

Class SingleEntryItemCollection

java.lang.Object

org.openjdk.jmc.flightrecorder.rules.jdk.util.SingleEntryItemCollection

All Implemented Interfaces:

java.lang.Iterable<IItemIterable>, IItemCollection

final class SingleEntryItemCollection
extends java.lang.Object
implements IItemCollection

Implementation helper class for handling a singular IItem as an IItemCollection.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	SingleEntryItemCollection.SingleEntryIItemIterable
private static class	SingleEntryItemCollection.SingleEntryIteratorOfIterable

Field Summary

Fields

Modifier and Type	Field and Description
private IItem	item
private static IItemCollection	NULLCOLLECTION
private static IItemIterable	NULLITERABLE

Constructor Summary

Constructors

Constructor and Description
SingleEntryItemCollection(IItem item)

Method Summary

Modifier and Type	Method and Description
IItemCollection	apply(IItemFilter filter) Creates a new item collection with all items in this collection that pass through the filter.
<V,C extends IItemConsumer<C>> V	getAggregate(IAggregator<V,C> aggregator) Calculates an aggregated value for the items in this collection.
boolean	hasItems()
java.util.Iterator<IItemIterable>	iterator()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

NULLCOLLECTION

private static final IItemCollection NULLCOLLECTION

NULLITERABLE

private static final IItemIterable NULLITERABLE

item

private final IItem item

Constructor Detail

SingleEntryItemCollection

SingleEntryItemCollection(IItem item)

Method Detail

iterator

public java.util.Iterator<IItemIterable> iterator()

Specified by:

iterator in interface java.lang.Iterable<IItemIterable>

apply

public IItemCollection apply(IItemFilter filter)

Description copied from interface: IItemCollection

Creates a new item collection with all items in this collection that pass through the filter. The collection may be eagerly or lazily evaluated.

Specified by:

apply in interface IItemCollection

Parameters:

filter - the filter to use when selecting items for the new collection

Returns:

a new collection of items

getAggregate

public <V,C extends IItemConsumer<C>> V getAggregate(IAggregator<V,C> aggregator)

Description copied from interface: IItemCollection

Calculates an aggregated value for the items in this collection.

Specified by:

getAggregate in interface IItemCollection

Type Parameters:

V - aggregate result value type

C - Item consumer type. See IAggregator.

Returns:

the aggregated value

hasItems

public boolean hasItems()

Specified by:

hasItems in interface IItemCollection

Returns:

true if the collections contains items, false otherwise