org.jrdf.query.relation.mem
Class RelationImpl

java.lang.Object
  org.jrdf.query.relation.mem.RelationImpl

All Implemented Interfaces:

Relation

public final class RelationImpl
extends Object
implements Relation

Implementation of relations containing a set of tuples and a set of attributes. The attribute constitute a heading the maps to the tuple values.

Version:

$Id: RelationImpl.java 1045 2007-01-05 04:56:09Z newmana $

Author:

Andrew Newman

Method Summary

boolean	equals(Object obj)
Set<Attribute>	getHeading() Returns the set of attributes or heading of the relation.
SortedSet<Attribute>	getSortedHeading()
SortedSet<Tuple>	getSortedTuples()
Set<Tuple>	getTuples() Returns the set of tuples.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

getHeading

public Set<Attribute> getHeading()

Description copied from interface: Relation

Returns the set of attributes or heading of the relation.

Specified by:

getHeading in interface Relation

Returns:

the set of attributes or heading of the relation.

getTuples

public Set<Tuple> getTuples()

Description copied from interface: Relation

Returns the set of tuples.

Specified by:

getTuples in interface Relation

Returns:

a set of tuples.

getSortedHeading

public SortedSet<Attribute> getSortedHeading()

Specified by:

getSortedHeading in interface Relation

getSortedTuples

public SortedSet<Tuple> getSortedTuples()

Specified by:

getSortedTuples in interface Relation

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object