Package it.unibz.inf.ontop.iq.planner.impl

Class AvoidJoinAboveUnionPlanner.AvoidJoinAboveUnionTransformer

java.lang.Object

it.unibz.inf.ontop.iq.transform.impl.DefaultRecursiveIQTreeVisitingTransformer

it.unibz.inf.ontop.iq.planner.impl.AvoidJoinAboveUnionPlanner.AvoidJoinAboveUnionTransformer

All Implemented Interfaces:

IQTreeTransformer, IQTreeVisitingTransformer

Enclosing class:

AvoidJoinAboveUnionPlanner

@Singleton
protected static class AvoidJoinAboveUnionPlanner.AvoidJoinAboveUnionTransformer
extends DefaultRecursiveIQTreeVisitingTransformer

Field Summary

Fields inherited from class it.unibz.inf.ontop.iq.transform.impl.DefaultRecursiveIQTreeVisitingTransformer

iqFactory

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AvoidJoinAboveUnionTransformer(IntermediateQueryFactory iqFactory)

Method Summary

Modifier and Type	Method	Description
protected Optional<Map.Entry<NaryIQTree,it.unibz.inf.ontop.com.google.common.collect.ImmutableList<Integer>>>	extractPushableSiblings(NaryIQTree unionTree, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)	Criteria for selecting siblings: must be leaf and must naturally join (i.e.
IQTree	transformInnerJoin(IQTree tree, InnerJoinNode rootNode, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> initialChildren)

Methods inherited from class it.unibz.inf.ontop.iq.transform.impl.DefaultRecursiveIQTreeVisitingTransformer

transformAggregation, transformBinaryNonCommutativeNode, transformConstruction, transformDistinct, transformEmpty, transformExtensionalData, transformFilter, transformIntensionalData, transformLeaf, transformLeftJoin, transformNaryCommutativeNode, transformNonStandardBinaryNonCommutativeNode, transformNonStandardLeafNode, transformNonStandardNaryNode, transformNonStandardUnaryNode, transformOrderBy, transformSlice, transformTrue, transformUnaryNode, transformUnion, transformValues

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unibz.inf.ontop.iq.transform.IQTreeVisitingTransformer

transform

Constructor Detail

AvoidJoinAboveUnionTransformer

@Inject
protected AvoidJoinAboveUnionTransformer(IntermediateQueryFactory iqFactory)

Method Detail

transformInnerJoin

public IQTree transformInnerJoin(IQTree tree,
                                 InnerJoinNode rootNode,
                                 it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> initialChildren)

Specified by:

transformInnerJoin in interface IQTreeVisitingTransformer

Overrides:

transformInnerJoin in class DefaultRecursiveIQTreeVisitingTransformer

extractPushableSiblings

protected Optional<Map.Entry<NaryIQTree,it.unibz.inf.ontop.com.google.common.collect.ImmutableList<Integer>>> extractPushableSiblings(NaryIQTree unionTree,
                                                                                                                                            it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)

Criteria for selecting siblings: must be leaf and must naturally join (i.e. share a variable) with the union