it.unibz.inf.ontop.iq.node.impl

Class JoinOrFilterNodeImpl

java.lang.Object

it.unibz.inf.ontop.iq.node.impl.QueryNodeImpl

it.unibz.inf.ontop.iq.node.impl.CompositeQueryNodeImpl

it.unibz.inf.ontop.iq.node.impl.JoinOrFilterNodeImpl

All Implemented Interfaces:

JoinOrFilterNode, QueryNode, Cloneable

Direct Known Subclasses:

FilterNodeImpl, JoinLikeNodeImpl

public abstract class JoinOrFilterNodeImpl
extends CompositeQueryNodeImpl
implements JoinOrFilterNode

Field Summary

Fields

Modifier and Type	Field and Description
protected SubstitutionFactory	substitutionFactory
protected ImmutableSubstitutionTools	substitutionTools
protected TermFactory	termFactory
protected TypeFactory	typeFactory
protected ImmutableUnificationTools	unificationTools

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JoinOrFilterNodeImpl(Optional<ImmutableExpression> optionalFilterCondition, TermNullabilityEvaluator nullabilityEvaluator, TermFactory termFactory, IntermediateQueryFactory iqFactory, TypeFactory typeFactory, SubstitutionFactory substitutionFactory, ImmutableUnificationTools unificationTools, ImmutableSubstitutionTools substitutionTools)

Method Summary

Modifier and Type	Method and Description
protected void	checkExpression(ImmutableExpression expression, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)
protected it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable>	computeNotInternallyRequiredVariables(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)
it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable>	getLocallyDefinedVariables() Locally defined variables must not appear in the sub-tree
it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable>	getLocallyRequiredVariables() Set of variables that this node, INDEPENDENTLY OF THE REQUIREMENTS OF ITS ANCESTORS, requires to be defined in the sub-tree.
it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable>	getLocalVariables() Set of variables MENTIONED in the node, INDEPENDENTLY of its sub-tree.
protected TermNullabilityEvaluator	getNullabilityEvaluator()
Optional<ImmutableExpression>	getOptionalFilterCondition()
protected String	getOptionalFilterString()
protected boolean	isDistinct(IQTree tree, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)
protected boolean	isFilteringNullValue(Variable variable)

Methods inherited from class it.unibz.inf.ontop.iq.node.impl.QueryNodeImpl

clone

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unibz.inf.ontop.iq.node.QueryNode

acceptNodeTransformer, acceptVisitor, clone, getRequiredVariables, isEquivalentTo, isSyntacticallyEquivalentTo, isVariableNullable

Field Detail

termFactory

protected final TermFactory termFactory

typeFactory

protected final TypeFactory typeFactory

substitutionFactory

protected final SubstitutionFactory substitutionFactory

unificationTools

protected final ImmutableUnificationTools unificationTools

substitutionTools

protected final ImmutableSubstitutionTools substitutionTools

Constructor Detail

JoinOrFilterNodeImpl

protected JoinOrFilterNodeImpl(Optional<ImmutableExpression> optionalFilterCondition,
                               TermNullabilityEvaluator nullabilityEvaluator,
                               TermFactory termFactory,
                               IntermediateQueryFactory iqFactory,
                               TypeFactory typeFactory,
                               SubstitutionFactory substitutionFactory,
                               ImmutableUnificationTools unificationTools,
                               ImmutableSubstitutionTools substitutionTools)

Method Detail

getOptionalFilterCondition

public Optional<ImmutableExpression> getOptionalFilterCondition()

Specified by:

getOptionalFilterCondition in interface JoinOrFilterNode

getOptionalFilterString

protected String getOptionalFilterString()

getLocalVariables

public it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable> getLocalVariables()

Description copied from interface: QueryNode

Set of variables MENTIONED in the node, INDEPENDENTLY of its sub-tree. See ImmutableQuery.getVariables(QueryNode node) for getting all the variables returned by the QueryNode.

Specified by:

getLocalVariables in interface QueryNode

isFilteringNullValue

protected boolean isFilteringNullValue(Variable variable)

getNullabilityEvaluator

protected TermNullabilityEvaluator getNullabilityEvaluator()

getLocallyRequiredVariables

public it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable> getLocallyRequiredVariables()

Description copied from interface: QueryNode

Set of variables that this node, INDEPENDENTLY OF THE REQUIREMENTS OF ITS ANCESTORS, requires to be defined in the sub-tree. Said differently, additional variable requirements may come from its ancestors.

Specified by:

getLocallyRequiredVariables in interface QueryNode

getLocallyDefinedVariables

public it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable> getLocallyDefinedVariables()

Description copied from interface: QueryNode

Locally defined variables must not appear in the sub-tree

Specified by:

getLocallyDefinedVariables in interface QueryNode

checkExpression

protected void checkExpression(ImmutableExpression expression,
                               it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)
                        throws InvalidIntermediateQueryException

Throws:

InvalidIntermediateQueryException

computeNotInternallyRequiredVariables

protected it.unibz.inf.ontop.com.google.common.collect.ImmutableSet<Variable> computeNotInternallyRequiredVariables(it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)

isDistinct

protected boolean isDistinct(IQTree tree,
                             it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)