it.unibz.inf.ontop.iq.node

Interface FilterNode

All Superinterfaces:

Cloneable, CommutativeJoinOrFilterNode, JoinOrFilterNode, QueryNode, UnaryOperatorNode

All Known Implementing Classes:

FilterNodeImpl

public interface FilterNode
extends CommutativeJoinOrFilterNode, UnaryOperatorNode

TODO: explain See IntermediateQueryFactory for creating a new instance.

Method Summary

Modifier and Type	Method and Description
FilterNode	acceptNodeTransformer(HomogeneousQueryNodeTransformer transformer) "Accept" method for the "Visitor" pattern.
FilterNode	changeFilterCondition(ImmutableExpression newFilterCondition) Returns a new FilterNode (immutable).
FilterNode	clone() Cloning is needed for having multiple copies in the same intermediate query tree.
ImmutableExpression	getFilterCondition() Not optional for a FilterNode.

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

getOptionalFilterCondition

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

acceptVisitor, getLocallyDefinedVariables, getLocallyRequiredVariables, getLocalVariables, getRequiredVariables, isEquivalentTo, isSyntacticallyEquivalentTo, isVariableNullable

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

acceptTransformer, acceptVisitor, applyDescendingSubstitution, applyDescendingSubstitutionWithoutOptimizing, applyFreshRenaming, computeNotInternallyRequiredVariables, getPossibleVariableDefinitions, getVariableNullability, inferUniqueConstraints, isConstructed, isDistinct, liftIncompatibleDefinitions, normalizeForOptimization, propagateDownConstraint, removeDistincts, validateNode

Method Detail

clone

FilterNode clone()

Description copied from interface: QueryNode

Cloning is needed for having multiple copies in the same intermediate query tree.

Specified by:

clone in interface QueryNode

acceptNodeTransformer

FilterNode acceptNodeTransformer(HomogeneousQueryNodeTransformer transformer)
                          throws QueryNodeTransformationException

Description copied from interface: QueryNode

"Accept" method for the "Visitor" pattern. To be implemented by leaf classes. If the transformation cannot be done, throw a QueryNodeTransformationException

Specified by:

acceptNodeTransformer in interface QueryNode

Specified by:

acceptNodeTransformer in interface UnaryOperatorNode

Throws:

QueryNodeTransformationException

getFilterCondition

ImmutableExpression getFilterCondition()

Not optional for a FilterNode.

changeFilterCondition

FilterNode changeFilterCondition(ImmutableExpression newFilterCondition)

Returns a new FilterNode (immutable).