ai.grakn.graql.internal.reasoner.atom.binary

Class TypeAtom

java.lang.Object

ai.grakn.graql.internal.reasoner.atom.AtomicBase

ai.grakn.graql.internal.reasoner.atom.Atom

ai.grakn.graql.internal.reasoner.atom.binary.Binary

ai.grakn.graql.internal.reasoner.atom.binary.TypeAtom

All Implemented Interfaces:

Atomic

Direct Known Subclasses:

HasAtom, IsaAtom, PlaysAtom, RelatesAtom, ScopeAtom, SubAtom

public abstract class TypeAtom
extends Binary

Atom implementation defining type atoms of the general form: {isa|sub|plays|relates|has|has-scope}($varName, $predicateVariable) Type atoms correspond to the following respective graql properties: IsaProperty, SubProperty, PlaysProperty RelatesProperty HasResourceTypeProperty HasScopeProperty

Author:

Kasper Piskorski

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TypeAtom(TypeAtom a)
protected	TypeAtom(VarPatternAdmin pattern, Var predicateVar, IdPredicate p, ReasonerQuery par)

Method Summary

Modifier and Type	Method and Description
int	computePriority(Set<Var> subbedVars) compute resolution priority based on provided substitution variables
boolean	equals(Object obj)
OntologyConcept	getOntologyConcept()
int	hashCode()
boolean	isRuleApplicable(InferenceRule child)
boolean	isSelectable()
boolean	isType()
boolean	requiresMaterialisation()
abstract Set<TypeAtom>	unify(Unifier u)

Methods inherited from class ai.grakn.graql.internal.reasoner.atom.binary.Binary

equivalenceHashCode, getCombinedPattern, getPredicate, getPredicateVariable, getTypeId, getUnifier, getVarNames, isEquivalent, setParentQuery

Methods inherited from class ai.grakn.graql.internal.reasoner.atom.Atom

baseResolutionPriority, getApplicableRules, getIdPredicates, getNeighbours, getNonSelectableConstraints, getPartialSubstitutions, getPermutationUnifiers, getPredicates, getSpecificTypeConstraints, getTypeConstraints, getValuePredicates, getVarProperties, inferTypes, isAtom, isRecursive, isRelation, isResource, isRuleResolvable, rewriteToUserDefined

Methods inherited from class ai.grakn.graql.internal.reasoner.atom.AtomicBase

containsVar, copy, getParentQuery, getPattern, getVarName, graph, isUserDefinedName, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface ai.grakn.graql.admin.Atomic

isAllowedToFormRuleHead, isPredicate, validateOntologically

Constructor Detail

TypeAtom

protected TypeAtom(VarPatternAdmin pattern,
                   Var predicateVar,
                   @Nullable
                   IdPredicate p,
                   ReasonerQuery par)

TypeAtom

protected TypeAtom(TypeAtom a)

Method Detail

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

isType

public boolean isType()

Overrides:

isType in class Atom

Returns:

true if the atom corresponds to a atom

isRuleApplicable

public boolean isRuleApplicable(InferenceRule child)

Specified by:

isRuleApplicable in class Atom

isSelectable

public boolean isSelectable()

Returns:

true if the atomic can form an atomic query

requiresMaterialisation

public boolean requiresMaterialisation()

Overrides:

requiresMaterialisation in class Atom

Returns:

true if the atom requires materialisation in order to be referenced

computePriority

public int computePriority(Set<Var> subbedVars)

Description copied from class: Atom

compute resolution priority based on provided substitution variables

Overrides:

computePriority in class Atom

Parameters:

subbedVars - variables having a substitution

Returns:

resolution priority value

getOntologyConcept

@Nullable
public OntologyConcept getOntologyConcept()

Overrides:

getOntologyConcept in class Binary

Returns:

corresponding type if any

unify

public abstract Set<TypeAtom> unify(Unifier u)