it.unibz.inf.ontop.iq.optimizer.impl

Class SelfJoinSameTermIQOptimizerImpl.SameTermSelfJoinTransformer

java.lang.Object

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

it.unibz.inf.ontop.iq.optimizer.impl.AbstractDiscardedVariablesTransformer

it.unibz.inf.ontop.iq.optimizer.impl.SelfJoinSameTermIQOptimizerImpl.SameTermSelfJoinTransformer

All Implemented Interfaces:

IQTreeTransformer, IQTreeVisitingTransformer

Enclosing class:

SelfJoinSameTermIQOptimizerImpl

protected static class SelfJoinSameTermIQOptimizerImpl.SameTermSelfJoinTransformer
extends AbstractDiscardedVariablesTransformer

TODO: explain

Field Summary

Fields inherited from class it.unibz.inf.ontop.iq.optimizer.impl.AbstractDiscardedVariablesTransformer

coreSingletons

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	SameTermSelfJoinTransformer(com.google.common.collect.ImmutableSet<Variable> discardedVariables, IQTreeTransformer lookForDistinctTransformer, OptimizationSingletons optimizationSingletons)

Method Summary

Modifier and Type	Method and Description
protected Optional<IQTree>	furtherSimplifyInnerJoinChildren(com.google.common.collect.ImmutableList<com.google.common.collect.ImmutableSet<Variable>> discardedVariablesPerChild, Optional<ImmutableExpression> optionalFilterCondition, com.google.common.collect.ImmutableList<IQTree> partiallySimplifiedChildren) TODO: explain Only removes some children that are extensional data nodes
protected AbstractDiscardedVariablesTransformer	update(com.google.common.collect.ImmutableSet<Variable> newDiscardedVariables)

Methods inherited from class it.unibz.inf.ontop.iq.optimizer.impl.AbstractDiscardedVariablesTransformer

transformBinaryNonCommutativeNode, transformConstruction, transformFilter, transformInnerJoin, transformLeftJoin, transformNaryCommutativeNode, transformOrderBy, transformSlice, transformUnaryNode, transformUnion

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

transformAggregation, transformDistinct, transformEmpty, transformExtensionalData, transformIntensionalData, transformLeaf, transformNonStandardBinaryNonCommutativeNode, transformNonStandardLeafNode, transformNonStandardNaryNode, transformNonStandardUnaryNode, transformTrue

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

SameTermSelfJoinTransformer

protected SameTermSelfJoinTransformer(com.google.common.collect.ImmutableSet<Variable> discardedVariables,
                                      IQTreeTransformer lookForDistinctTransformer,
                                      OptimizationSingletons optimizationSingletons)

Method Detail

update

protected AbstractDiscardedVariablesTransformer update(com.google.common.collect.ImmutableSet<Variable> newDiscardedVariables)

Specified by:

update in class AbstractDiscardedVariablesTransformer

furtherSimplifyInnerJoinChildren

protected Optional<IQTree> furtherSimplifyInnerJoinChildren(com.google.common.collect.ImmutableList<com.google.common.collect.ImmutableSet<Variable>> discardedVariablesPerChild,
                                                            Optional<ImmutableExpression> optionalFilterCondition,
                                                            com.google.common.collect.ImmutableList<IQTree> partiallySimplifiedChildren)

TODO: explain Only removes some children that are extensional data nodes

Specified by:

furtherSimplifyInnerJoinChildren in class AbstractDiscardedVariablesTransformer