vishnu.model.algebra
Class CartesianProduct

java.lang.Object
  vishnu.model.algebra.AbstractBinaryRelation
      vishnu.model.algebra.CartesianProduct

All Implemented Interfaces:

BinaryRelation, Relation

public class CartesianProduct
extends AbstractBinaryRelation

Representa a la relacion producto cartesiano del algebra relacional.

Author:

Mariano Tepper

Nested Class Summary

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

Relation.Context, Relation.ContextNotSelectedException

Field Summary

Fields inherited from class vishnu.model.algebra.AbstractBinaryRelation

r, s

Constructor Summary

CartesianProduct(Relation r, Relation s)
Creates a new instance of ProductoCartesiano

Method Summary

protected static void	addSignature(DefaultTableSignature dest, TableSignature source)
TableSignature	calculateSignature()
boolean	equals(java.lang.Object o)
static TableSignature	getProductSignature(TableSignature leftSignature, TableSignature rightSignature) Construye la signatura combinada en base a las signaturas de sus parametros.
int	hashCode()
java.lang.String	toString()

Methods inherited from class vishnu.model.algebra.AbstractBinaryRelation

algorithm, algorithm, debugging, hasChanged, leftRelation, leftRelation, perform, rightRelation, rightRelation, setChanged, setContext, signature

Methods inherited from class java.lang.Object

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

Constructor Detail

CartesianProduct

public CartesianProduct(Relation r,
                        Relation s)

Creates a new instance of ProductoCartesiano

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getProductSignature

public static TableSignature getProductSignature(TableSignature leftSignature,
                                                 TableSignature rightSignature)

Construye la signatura combinada en base a las signaturas de sus parametros.

addSignature

protected static void addSignature(DefaultTableSignature dest,
                                   TableSignature source)

calculateSignature

public TableSignature calculateSignature()

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object