org.aksw.sparqlify.core.algorithms

Class SelfJoinEliminator

java.lang.Object

org.aksw.sparqlify.core.algorithms.SelfJoinEliminator

public class SelfJoinEliminator
extends Object

Constructor Summary

Constructors

Constructor and Description
SelfJoinEliminator()

Method Summary

Methods

Modifier and Type	Method and Description
static void	eliminateSelfJoins(List<ViewInstance> viewInstances)
static void	merge(ViewInstanceJoin conjunction) Eleminate self-joins from the conjunction In place operation
static ViewInstance	merge(ViewInstance a, ViewInstance b) Does an merge of self-joins if possible.

Methods inherited from class java.lang.Object

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

Constructor Detail

SelfJoinEliminator

public SelfJoinEliminator()

Method Detail

merge

public static ViewInstance merge(ViewInstance a,
                 ViewInstance b)

Does an merge of self-joins if possible.

Parameters:

a -

b -

Returns:

null if no merge occured, or a new instance holding the merge

merge

public static void merge(ViewInstanceJoin conjunction)

Eleminate self-joins from the conjunction In place operation

Parameters:

conjunction -

eliminateSelfJoins

public static void eliminateSelfJoins(List<ViewInstance> viewInstances)