org.apache.giraph.object

Class MultiSizedReusable<T>

java.lang.Object

org.apache.giraph.object.MultiSizedReusable<T>

Type Parameters:

T - Type of reusable object

All Implemented Interfaces:

Serializable, Int2ObjFunction<T>

public class MultiSizedReusable<T>
extends Object
implements Int2ObjFunction<T>

Holds reusable objects of multiple sizes. Example usecase, is when we need a hashmap - that we will insert and iterate on, both clear() and iterate method depend on size. And if we want to reuse objects, we want to have multiple objects of different sizes, that we will reuse. Instead of creating object for each distinct size, it creates objects with first larger power of 2.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MultiSizedReusable(Int2ObjFunction<T> createSized, Consumer<T> init)

Method Summary

Modifier and Type	Method and Description
T	apply(int size) Returns the result of applying this function to given input.
static <K,V> MultiSizedReusable<Basic2ObjectMap<K,V>>	createForBasic2ObjectMap(PrimitiveIdTypeOps<K> idTypeOps)
static <I> MultiSizedReusable<BasicSet<I>>	createForBasicSet(PrimitiveIdTypeOps<I> idTypeOps)

Methods inherited from class java.lang.Object

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

Constructor Detail

MultiSizedReusable

public MultiSizedReusable(Int2ObjFunction<T> createSized,
                          Consumer<T> init)

Method Detail

apply

public T apply(int size)

Description copied from interface: Int2ObjFunction

Returns the result of applying this function to given input. The returned object may or may not be a new instance, depending on the implementation.

Specified by:

apply in interface Int2ObjFunction<T>

Parameters:

size - input

Returns:

result

createForBasicSet

public static <I> MultiSizedReusable<BasicSet<I>> createForBasicSet(PrimitiveIdTypeOps<I> idTypeOps)

createForBasic2ObjectMap

public static <K,V> MultiSizedReusable<Basic2ObjectMap<K,V>> createForBasic2ObjectMap(PrimitiveIdTypeOps<K> idTypeOps)