ai.grakn.graql.internal.reasoner.query

Class AtomicMatchQuery

java.lang.Object

ai.grakn.graql.internal.reasoner.query.Query

ai.grakn.graql.internal.reasoner.query.AtomicQuery

ai.grakn.graql.internal.reasoner.query.AtomicMatchQuery

public class AtomicMatchQuery
extends AtomicQuery

Atomic reasoner query providing resolution streaming facilities.

Author:

Kasper Piskorski

Constructor Summary

Constructors

Constructor and Description
AtomicMatchQuery(AtomicQuery query, QueryAnswers ans)
AtomicMatchQuery(Atom atom, Set<VarName> vars)
AtomicMatchQuery(MatchQuery query, GraknGraph graph)

Method Summary

Modifier and Type	Method and Description
QueryAnswers	answer(Set<AtomicQuery> subGoals, QueryCache cache, boolean materialise) answer the query by providing combined lookup/rule resolutions
void	DBlookup() resolve the query by performing a db lookup
QueryAnswers	getAnswers()
QueryAnswers	getNewAnswers()
void	lookup(QueryCache cache) resolve the query by performing either a db or memory lookup, depending on which is more appropriate
QueryAnswers	materialise()
void	memoryLookup(QueryCache cache) resolve the query by performing a memory (cache) lookup
void	propagateAnswers(QueryCache cache) propagate answers to relation resolutions in the cache
java.util.stream.Stream<Map<VarName,Concept>>	resolve(boolean materialise) resolves the query
void	resolveViaRule(Rule rl, Set<AtomicQuery> subGoals, QueryCache cache, boolean materialise) attempt query resolution via application of a specific rule

Methods inherited from class ai.grakn.graql.internal.reasoner.query.AtomicQuery

addAtom, equals, establishRelation, getAtom, getChildren, getParent, materialise, removeAtom, selectAtoms, unify

Methods inherited from class ai.grakn.graql.internal.reasoner.query.Query

addAtomConstraints, containsAtom, containsEquivalentAtom, getAtoms, getFilters, getIdPredicate, getIdPredicates, getMatchQuery, getPattern, getResources, getSelectedNames, getTypeConstraints, getValuePredicates, getVarSet, getVarTypeMap, graph, hashCode, isEquivalent, isRuleResolvable, selectAppend, toString, unify

Methods inherited from class java.lang.Object

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

Constructor Detail

AtomicMatchQuery

public AtomicMatchQuery(Atom atom,
                        Set<VarName> vars)

AtomicMatchQuery

public AtomicMatchQuery(MatchQuery query,
                        GraknGraph graph)

AtomicMatchQuery

public AtomicMatchQuery(AtomicQuery query,
                        QueryAnswers ans)

Method Detail

getAnswers

public QueryAnswers getAnswers()

Overrides:

getAnswers in class Query

getNewAnswers

public QueryAnswers getNewAnswers()

Overrides:

getNewAnswers in class Query

lookup

public void lookup(QueryCache cache)

Description copied from class: Query

resolve the query by performing either a db or memory lookup, depending on which is more appropriate

Overrides:

lookup in class Query

Parameters:

cache - container of already performed query resolutions

DBlookup

public void DBlookup()

Description copied from class: Query

resolve the query by performing a db lookup

Overrides:

DBlookup in class Query

memoryLookup

public void memoryLookup(QueryCache cache)

Description copied from class: Query

resolve the query by performing a memory (cache) lookup

Overrides:

memoryLookup in class Query

Parameters:

cache - container of already performed query resolutions

propagateAnswers

public void propagateAnswers(QueryCache cache)

Description copied from class: Query

propagate answers to relation resolutions in the cache

Overrides:

propagateAnswers in class Query

Parameters:

cache - container of already performed query resolutions

materialise

public QueryAnswers materialise()

Overrides:

materialise in class AtomicQuery

Returns:

inserted concepts if the atom required materialisation in order to be referencable

resolveViaRule

public void resolveViaRule(Rule rl,
                           Set<AtomicQuery> subGoals,
                           QueryCache cache,
                           boolean materialise)

Description copied from class: AtomicQuery

attempt query resolution via application of a specific rule

Overrides:

resolveViaRule in class AtomicQuery

Parameters:

rl - rule through which to resolve the query

subGoals - set of visited subqueries

cache - collection of performed query resolutions

materialise - materialisation flag

answer

public QueryAnswers answer(Set<AtomicQuery> subGoals,
                           QueryCache cache,
                           boolean materialise)

Description copied from class: AtomicQuery

answer the query by providing combined lookup/rule resolutions

Overrides:

answer in class AtomicQuery

Parameters:

subGoals - set of visited subqueries

cache - collection of performed query resolutions

materialise - materialisation flag

Returns:

answers to the query

resolve

public java.util.stream.Stream<Map<VarName,Concept>> resolve(boolean materialise)

Description copied from class: Query

resolves the query

Overrides:

resolve in class Query

Parameters:

materialise - materialisation flag

Returns:

stream of answers