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

Class PostProcessableFunctionLifterImpl.FunctionLifterTransformer

java.lang.Object

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

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

All Implemented Interfaces:

IQTreeTransformer, IQTreeVisitingTransformer

Enclosing class:

PostProcessableFunctionLifterImpl

public static class PostProcessableFunctionLifterImpl.FunctionLifterTransformer
extends DefaultRecursiveIQTreeVisitingTransformer

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	LOOPING_BOUND
protected OptimizationSingletons	optimizationSingletons
protected VariableGenerator	variableGenerator

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

iqFactory

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FunctionLifterTransformer(VariableGenerator variableGenerator, OptimizationSingletons optimizationSingletons)

Method Summary

Modifier and Type	Method and Description
protected PostProcessableFunctionLifterImpl.LiftState	lift(PostProcessableFunctionLifterImpl.LiftState initialState)
protected Optional<Variable>	selectVariableToLift(it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable> unionVariables, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)
protected boolean	shouldBeLifted(ImmutableFunctionalTerm functionalTerm, int nbChildren) Recursive
protected boolean	shouldBeLifted(Variable variable, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)
protected PostProcessableFunctionLifterImpl.LiftState	step(PostProcessableFunctionLifterImpl.LiftState state)
protected IQTree	transformBinaryNonCommutativeNode(IQTree tree, BinaryNonCommutativeOperatorNode rootNode, IQTree leftChild, IQTree rightChild)
protected IQTree	transformNaryCommutativeNode(IQTree tree, NaryOperatorNode rootNode, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)
protected IQTree	transformUnaryNode(IQTree tree, UnaryOperatorNode rootNode, IQTree child)
IQTree	transformUnion(IQTree tree, UnionNode rootNode, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)

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

transformAggregation, transformConstruction, transformDistinct, transformEmpty, transformExtensionalData, transformFilter, transformInnerJoin, transformIntensionalData, transformLeaf, transformLeftJoin, transformNonStandardBinaryNonCommutativeNode, transformNonStandardLeafNode, transformNonStandardNaryNode, transformNonStandardUnaryNode, transformOrderBy, transformSlice, 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

Field Detail

LOOPING_BOUND

protected static final int LOOPING_BOUND

See Also:

Constant Field Values

variableGenerator

protected final VariableGenerator variableGenerator

optimizationSingletons

protected final OptimizationSingletons optimizationSingletons

Constructor Detail

FunctionLifterTransformer

protected FunctionLifterTransformer(VariableGenerator variableGenerator,
                                    OptimizationSingletons optimizationSingletons)

Method Detail

transformUnaryNode

protected IQTree transformUnaryNode(IQTree tree,
                                    UnaryOperatorNode rootNode,
                                    IQTree child)

Overrides:

transformUnaryNode in class DefaultRecursiveIQTreeVisitingTransformer

transformNaryCommutativeNode

protected IQTree transformNaryCommutativeNode(IQTree tree,
                                              NaryOperatorNode rootNode,
                                              it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)

Overrides:

transformNaryCommutativeNode in class DefaultRecursiveIQTreeVisitingTransformer

transformBinaryNonCommutativeNode

protected IQTree transformBinaryNonCommutativeNode(IQTree tree,
                                                   BinaryNonCommutativeOperatorNode rootNode,
                                                   IQTree leftChild,
                                                   IQTree rightChild)

Overrides:

transformBinaryNonCommutativeNode in class DefaultRecursiveIQTreeVisitingTransformer

transformUnion

public IQTree transformUnion(IQTree tree,
                             UnionNode rootNode,
                             it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)

Specified by:

transformUnion in interface IQTreeVisitingTransformer

Overrides:

transformUnion in class DefaultRecursiveIQTreeVisitingTransformer

lift

protected PostProcessableFunctionLifterImpl.LiftState lift(PostProcessableFunctionLifterImpl.LiftState initialState)

step

protected PostProcessableFunctionLifterImpl.LiftState step(PostProcessableFunctionLifterImpl.LiftState state)

selectVariableToLift

protected Optional<Variable> selectVariableToLift(it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable> unionVariables,
                                                  it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)

shouldBeLifted

protected boolean shouldBeLifted(Variable variable,
                                 it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)

shouldBeLifted

protected boolean shouldBeLifted(ImmutableFunctionalTerm functionalTerm,
                                 int nbChildren)

Recursive