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

Class Relation

java.lang.Object

ai.grakn.graql.internal.reasoner.atom.AtomBase

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

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

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

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

All Implemented Interfaces:

Atomic, Cloneable

public class Relation
extends TypeAtom

Field Summary

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

type, typeId

Fields inherited from class ai.grakn.graql.internal.reasoner.atom.AtomBase

atomPattern, varName

Constructor Summary

Constructors

Constructor and Description
Relation(String name, String typeVariable, Map<String,String> roleMap, Predicate pred, Query par)
Relation(VarAdmin pattern)
Relation(VarAdmin pattern, Predicate predicate, Query par)
Relation(VarAdmin pattern, Query par)

Method Summary

Modifier and Type	Method and Description
Atomic	clone()
boolean	containsVar(String name)
boolean	equals(Object obj)
int	equivalenceHashCode()
protected String	extractValueVariableName(VarAdmin var)
Set<Predicate>	getIdPredicates()
Set<String>	getRolePlayers()
Map<RoleType,javafx.util.Pair<String,Type>>	getRoleVarTypeMap()
Set<String>	getSelectedNames()
Map<String,String>	getUnifiers(Atomic pAtom)
Set<String>	getVarNames()
Map<String,javafx.util.Pair<Type,RoleType>>	getVarTypeRoleMap()
int	hashCode()
void	inferTypes()
boolean	isEquivalent(Object obj)
boolean	isRelation()
protected boolean	isRuleApplicable(InferenceRule child)
boolean	isRuleResolvable()
boolean	isSelectable()
javafx.util.Pair<Atom,Map<String,String>>	rewrite(Atom parentAtom, Query parent)
protected void	setValueVariable(String var)
void	unify(Map<String,String> mappings) change each variable occurrence according to provided mappings (apply unifiers {[from, to]_i}) if capture occurs it is marked with a "capture->" name
void	unify(String from, String to) change each variable occurrence in the atom (apply unifier [from/to]) if capture occurs it is marked with a "capture->" name

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

extractTypeId, getType, isType

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

getLinkedAtoms, getPredicate, getPredicates, getValuePredicates, getValueVariable, isBinary, isValueUserDefinedName, requiresMaterialisation, setParentQuery, setPredicate

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

getApplicableRules, getTypeConstraints, getTypeId, isAtom, isRecursive, isResource

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

getParentQuery, getPattern, getVarName, isUserDefinedName, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface ai.grakn.graql.internal.reasoner.atom.Atomic

isPredicate

Constructor Detail

Relation

public Relation(VarAdmin pattern)

Relation

public Relation(VarAdmin pattern,
                Query par)

Relation

public Relation(VarAdmin pattern,
                Predicate predicate,
                Query par)

Relation

public Relation(String name,
                String typeVariable,
                Map<String,String> roleMap,
                Predicate pred,
                Query par)

Method Detail

extractValueVariableName

protected String extractValueVariableName(VarAdmin var)

Overrides:

extractValueVariableName in class TypeAtom

setValueVariable

protected void setValueVariable(String var)

Overrides:

setValueVariable in class TypeAtom

clone

public Atomic clone()

Specified by:

clone in interface Atomic

Overrides:

clone in class TypeAtom

equals

public boolean equals(Object obj)

Overrides:

equals in class Binary

hashCode

public int hashCode()

Overrides:

hashCode in class Binary

isEquivalent

public boolean isEquivalent(Object obj)

Specified by:

isEquivalent in interface Atomic

Overrides:

isEquivalent in class Binary

Returns:

true if atom alpha-equivalent

equivalenceHashCode

public int equivalenceHashCode()

Specified by:

equivalenceHashCode in interface Atomic

Overrides:

equivalenceHashCode in class Binary

isRelation

public boolean isRelation()

Overrides:

isRelation in class Atom

Returns:

true if the atom corresponds to a non-unary atom

isSelectable

public boolean isSelectable()

Returns:

true if the atom can form an atomic query

isRuleApplicable

protected boolean isRuleApplicable(InferenceRule child)

Overrides:

isRuleApplicable in class Binary

isRuleResolvable

public boolean isRuleResolvable()

Specified by:

isRuleResolvable in interface Atomic

Overrides:

isRuleResolvable in class Atom

Returns:

true if the atom can be resolved by a rule (atom exists in one of the rule's head)

inferTypes

public void inferTypes()

Overrides:

inferTypes in class Atom

containsVar

public boolean containsVar(String name)

Specified by:

containsVar in interface Atomic

Overrides:

containsVar in class AtomBase

Parameters:

name - variable name

Returns:

true if atom contains an occurrence of the variable name

getIdPredicates

public Set<Predicate> getIdPredicates()

Overrides:

getIdPredicates in class TypeAtom

unify

public void unify(String from,
                  String to)

Description copied from interface: Atomic

change each variable occurrence in the atom (apply unifier [from/to]) if capture occurs it is marked with a "capture->" name

Specified by:

unify in interface Atomic

Overrides:

unify in class Binary

Parameters:

from - variable name to be changed

to - new variable name

unify

public void unify(Map<String,String> mappings)

Description copied from interface: Atomic

change each variable occurrence according to provided mappings (apply unifiers {[from, to]_i}) if capture occurs it is marked with a "capture->" name

Specified by:

unify in interface Atomic

Overrides:

unify in class Binary

Parameters:

mappings - contain variable mappings to be applied

getVarNames

public Set<String> getVarNames()

Specified by:

getVarNames in interface Atomic

Overrides:

getVarNames in class Binary

Returns:

all addressable variable names in the atom

getSelectedNames

public Set<String> getSelectedNames()

Overrides:

getSelectedNames in class Binary

getRolePlayers

public Set<String> getRolePlayers()

getVarTypeRoleMap

public Map<String,javafx.util.Pair<Type,RoleType>> getVarTypeRoleMap()

Overrides:

getVarTypeRoleMap in class Atom

getRoleVarTypeMap

public Map<RoleType,javafx.util.Pair<String,Type>> getRoleVarTypeMap()

Overrides:

getRoleVarTypeMap in class Atom

getUnifiers

public Map<String,String> getUnifiers(Atomic pAtom)

Specified by:

getUnifiers in interface Atomic

Overrides:

getUnifiers in class Binary

rewrite

public javafx.util.Pair<Atom,Map<String,String>> rewrite(Atom parentAtom,
                                                         Query parent)

Overrides:

rewrite in class Atom