vishnu.model.algebra
Interface UnaryRelation

All Superinterfaces:

java.lang.Cloneable, Relation

All Known Subinterfaces:

Selection

All Known Implementing Classes:

AbstractUnaryRelation, ConjunctiveSelection, MixedSelection, Projection, Renaming

public interface UnaryRelation
extends Relation, java.lang.Cloneable

Esta interfaz modela las relaciones unarias del algebra relacional.

Author:

Hernan Rancati

Nested Class Summary

Nested classes/interfaces inherited from interface vishnu.model.algebra.Relation

Relation.Context, Relation.ContextNotSelectedException

Method Summary

java.lang.Object	clone() Clona la relacion.
Relation	relation() Devuelve la relacion de interior.
void	relation(Relation inner) Setea la relacion interior.

Methods inherited from interface vishnu.model.algebra.Relation

algorithm, algorithm, hasChanged, perform, setChanged, setContext, signature

Method Detail

relation

Relation relation()

Devuelve la relacion de interior.

Returns:

la relacionsobre la que se trabaja.

relation

void relation(Relation inner)

Setea la relacion interior.

Parameters:

inner - - la nueva realcion interior.

clone

java.lang.Object clone()

Clona la relacion.