jpaul.DataStructs
Class RelationFactory<K,V>

java.lang.Object
  jpaul.DataStructs.RelationFactory<K,V>

All Implemented Interfaces:

Factory<Relation<K,V>>

Direct Known Subclasses:

RelFacts.COWRelationFactory, RelFacts.MapSetRelationFactory

public abstract class RelationFactory<K,V>
extends java.lang.Object
implements Factory<Relation<K,V>>

RelationFactory is a relation-specific instance of the factory pattern.

Various relation factories are available in the class RelFacts.

Version:

$Id: RelationFactory.java,v 1.4 2005/08/22 14:07:21 salcianu Exp $

Author:

Alexandru Salcianu - salcianu@alum.mit.edu

Constructor Summary

RelationFactory()

Method Summary

abstract Relation<K,V>	create() Create a new object of class T.
Relation<K,V>	create(Relation<K,V> r) Default implementation: uses create() to create an empty relation, and next add each pair from r to the new relation.

Methods inherited from class java.lang.Object

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

Constructor Detail

RelationFactory

public RelationFactory()

Method Detail

create

public abstract Relation<K,V> create()

Description copied from interface: Factory

Create a new object of class T. Corresponds to a default constructor.

Specified by:

create in interface Factory<Relation<K,V>>

create

public Relation<K,V> create(Relation<K,V> r)

Default implementation: uses create() to create an empty relation, and next add each pair from r to the new relation.

Specified by:

create in interface Factory<Relation<K,V>>