it.unibz.inf.ontop.iq.executor.join

Class SelfJoinLikeExecutor

java.lang.Object

it.unibz.inf.ontop.iq.executor.join.SelfJoinLikeExecutor

Direct Known Subclasses:

RedundantSelfJoinExecutor

public class SelfJoinLikeExecutor
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	SelfJoinLikeExecutor.AtomUnificationException TODO: explain TODO: find valid cases
protected static class	SelfJoinLikeExecutor.ConcreteProposal TODO: explain
protected static class	SelfJoinLikeExecutor.PredicateLevelProposal TODO: explain

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SelfJoinLikeExecutor(ImmutableUnificationTools unificationTools, TermFactory termFactory)

Method Summary

Modifier and Type	Method and Description
protected static it.unibz.inf.ontop.com.google.common.collect.ImmutableMultimap<RelationDefinition,ExtensionalDataNode>	extractDataNodes(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<QueryNode> siblings)
protected it.unibz.inf.ontop.com.google.common.collect.ImmutableList<ImmutableSubstitution<VariableOrGroundTerm>>	extractSubstitutions(it.unibz.inf.ontop.com.google.common.collect.ImmutableCollection<SelfJoinLikeExecutor.PredicateLevelProposal> predicateProposals)
protected Optional<ImmutableSubstitution<VariableOrGroundTerm>>	mergeSubstitutions(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<ImmutableSubstitution<VariableOrGroundTerm>> substitutions, it.unibz.inf.ontop.com.google.common.collect.ImmutableMultimap<RelationDefinition,ExtensionalDataNode> initialDataNodeMap, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<Variable> priorityVariables)
protected it.unibz.inf.ontop.com.google.common.collect.ImmutableList<Variable>	prioritizeVariables(IntermediateQuery query, JoinLikeNode joinLikeNode) TODO: implement seriously
protected <N extends JoinOrFilterNode> NodeCentricOptimizationResults<N>	updateJoinNodeAndPropagateSubstitution(IntermediateQuery query, QueryTreeComponent treeComponent, N joinNode, SelfJoinLikeExecutor.ConcreteProposal proposal)

Methods inherited from class java.lang.Object

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

Constructor Detail

SelfJoinLikeExecutor

protected SelfJoinLikeExecutor(ImmutableUnificationTools unificationTools,
                               TermFactory termFactory)

Method Detail

extractDataNodes

protected static it.unibz.inf.ontop.com.google.common.collect.ImmutableMultimap<RelationDefinition,ExtensionalDataNode> extractDataNodes(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<QueryNode> siblings)

mergeSubstitutions

protected Optional<ImmutableSubstitution<VariableOrGroundTerm>> mergeSubstitutions(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<ImmutableSubstitution<VariableOrGroundTerm>> substitutions,
                                                                                   it.unibz.inf.ontop.com.google.common.collect.ImmutableMultimap<RelationDefinition,ExtensionalDataNode> initialDataNodeMap,
                                                                                   it.unibz.inf.ontop.com.google.common.collect.ImmutableList<Variable> priorityVariables)
                                                                            throws SelfJoinLikeExecutor.AtomUnificationException

Throws:

SelfJoinLikeExecutor.AtomUnificationException

extractSubstitutions

protected it.unibz.inf.ontop.com.google.common.collect.ImmutableList<ImmutableSubstitution<VariableOrGroundTerm>> extractSubstitutions(it.unibz.inf.ontop.com.google.common.collect.ImmutableCollection<SelfJoinLikeExecutor.PredicateLevelProposal> predicateProposals)

updateJoinNodeAndPropagateSubstitution

protected <N extends JoinOrFilterNode> NodeCentricOptimizationResults<N> updateJoinNodeAndPropagateSubstitution(IntermediateQuery query,
                                                                                                                QueryTreeComponent treeComponent,
                                                                                                                N joinNode,
                                                                                                                SelfJoinLikeExecutor.ConcreteProposal proposal)
                                                                                                         throws EmptyQueryException

Throws:

EmptyQueryException

prioritizeVariables

protected it.unibz.inf.ontop.com.google.common.collect.ImmutableList<Variable> prioritizeVariables(IntermediateQuery query,
                                                                                                   JoinLikeNode joinLikeNode)

TODO: implement seriously