net.cscott.jutil
Class AggregateSetFactory<V>

java.lang.Object
  net.cscott.jutil.CollectionFactory<V>
      net.cscott.jutil.SetFactory<V>
          net.cscott.jutil.AggregateSetFactory<V>

All Implemented Interfaces:

Serializable

public class AggregateSetFactory<V>
extends SetFactory<V>
implements Serializable

AggregateSetFactory uses a single HashMap as backing store for the many smaller Sets created by this SetFactory. This means that we use much less space and rehash less frequently than if we were using the standard Factories.hashSetFactory().

Version:

$Id: AggregateSetFactory.java,v 1.6 2006-10-30 20:14:41 cananian Exp $

Author:

C. Scott Ananian

See Also:

Serialized Form

Constructor Summary

AggregateSetFactory()
Creates an AggregateSetFactory.

Method Summary

Set<V>

makeSet(Collection<? extends V> c) Generates a new mutable Set which is a subset of the backing set of this AggregateSetFactory.

Methods inherited from class net.cscott.jutil.SetFactory

makeCollection, makeCollection, makeCollection, makeSet, makeSet

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregateSetFactory

public AggregateSetFactory()

Creates an AggregateSetFactory.

Method Detail

makeSet

public Set<V> makeSet(Collection<? extends V> c)

Generates a new mutable Set which is a subset of the backing set of this AggregateSetFactory. WARNING: The remove() method of the returned Set is very slow.

Specified by:

makeSet in class SetFactory<V>