vishnu.model.algebra.algorithms.selection
Class HashIndexEqualitySelectionAlgorithm

java.lang.Object
  vishnu.model.algebra.algorithms.selection.AbstractSelectionAlgorithm
      vishnu.model.algebra.algorithms.selection.HashIndexEqualitySelectionAlgorithm

All Implemented Interfaces:

Algorithm, UnaryAlgorithm

public class HashIndexEqualitySelectionAlgorithm
extends AbstractSelectionAlgorithm
implements UnaryAlgorithm

Debe ser del tipo atr1=v1 AND atr2=v2 AND atr3=v3 ...

Author:

Mariano Tepper

Field Summary

Fields inherited from class vishnu.model.algebra.algorithms.selection.AbstractSelectionAlgorithm

canceled, conditions, r

Constructor Summary

HashIndexEqualitySelectionAlgorithm()

Method Summary

boolean	canBePerformed() Indica si el algoritmo puede ser ejecutado sobre la relacion definida.
Algorithm	clone() Clona el algoritmo.
protected void	copyFilteredTable(Table destTable, Table sourceTable, Session session)
boolean	equals(java.lang.Object o)
int	hashCode()
void	innerTable(TableContext c) Setea la tabla interior del algoritmo.
void	perform(Relation.Context c) Ejecuta el algoritmo con el contexto dado
java.lang.String	toString()

Methods inherited from class vishnu.model.algebra.algorithms.selection.AbstractSelectionAlgorithm

attach, cancel, isCanceled

Methods inherited from class java.lang.Object

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

Methods inherited from interface vishnu.model.algebra.algorithms.Algorithm

attach, cancel, isCanceled

Constructor Detail

HashIndexEqualitySelectionAlgorithm

public HashIndexEqualitySelectionAlgorithm()

Method Detail

perform

public void perform(Relation.Context c)

Description copied from interface: Algorithm

Ejecuta el algoritmo con el contexto dado

Specified by:

perform in interface Algorithm

Overrides:

perform in class AbstractSelectionAlgorithm

Parameters:

c - - el contexto de ejecucion.

copyFilteredTable

protected void copyFilteredTable(Table destTable,
                                 Table sourceTable,
                                 Session session)

Specified by:

copyFilteredTable in class AbstractSelectionAlgorithm

innerTable

public void innerTable(TableContext c)

Description copied from interface: UnaryAlgorithm

Setea la tabla interior del algoritmo.

Specified by:

innerTable in interface UnaryAlgorithm

Overrides:

innerTable in class AbstractSelectionAlgorithm

Parameters:

c - - la tabla interior del algoritmo.

canBePerformed

public boolean canBePerformed()

Description copied from interface: Algorithm

Indica si el algoritmo puede ser ejecutado sobre la relacion definida.

Specified by:

canBePerformed in interface Algorithm

Specified by:

canBePerformed in class AbstractSelectionAlgorithm

Returns:

true si puede ser ejecutado, false si no.

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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

clone

public Algorithm clone()

Description copied from interface: Algorithm

Clona el algoritmo.

Specified by:

clone in interface Algorithm

Specified by:

clone in class AbstractSelectionAlgorithm