Package net.cscott.jutil

Class AggregateMapFactory<K,V>

java.lang.Object

net.cscott.jutil.AggregateMapFactory<K,V>

All Implemented Interfaces:

Serializable, MapFactory<K,V>

public class AggregateMapFactory<K,V>
extends Object
implements MapFactory<K,V>, Serializable

AggregateMapFactory uses a single HashMap as backing store for the many smaller Maps created by this MapFactory. This means that we use much less space and rehash less frequently than if we were using the standard Factories.hashMapFactory(). The iterators of the submaps are fast, unlike those of HashMap.

Author:

C. Scott Ananian <cananian@alumni.princeton.edu>

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
AggregateMapFactory()	Creates an AggregateMapFactory.

Method Summary

Modifier and Type	Method	Description
Map<K,V>	makeMap(Map<? extends K,? extends V> mm)	Generates a new mutable Map which is a subset of the backing set of this AggregateMapFactory.

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.cscott.jutil.MapFactory

makeMap

Constructor Details

AggregateMapFactory

public AggregateMapFactory()

Creates an AggregateMapFactory.

Method Details

makeMap

public Map<K,V> makeMap(Map<? extends K,? extends V> mm)

Generates a new mutable Map which is a subset of the backing set of this AggregateMapFactory.

Specified by:

makeMap in interface MapFactory<K,V>