ai.grakn.kb.internal.cache

Class TxRuleCache

java.lang.Object

ai.grakn.kb.internal.cache.TxRuleCache

public class TxRuleCache
extends Object

Caches rules applicable to schema concepts and their conversion to InferenceRule object (parsing is expensive when large number of rules present). NB: non-committed rules are alse cached.

Author:

Kasper Piskorski

Constructor Summary

Constructors

Constructor and Description
TxRuleCache(EmbeddedGraknTx tx)

Method Summary

Modifier and Type	Method and Description
void	closeTx() cleans cache contents
<T> T	getRule(Rule rule, java.util.function.Supplier<T> converter)
java.util.stream.Stream<Rule>	getRules()
java.util.stream.Stream<Rule>	getRulesWithType(SchemaConcept type)
java.util.stream.Stream<Rule>	getRulesWithType(SchemaConcept type, boolean direct)
Set<Rule>	updateRules(SchemaConcept type, Rule rule)

Methods inherited from class java.lang.Object

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

Constructor Detail

TxRuleCache

public TxRuleCache(EmbeddedGraknTx tx)

Method Detail

getRules

public java.util.stream.Stream<Rule> getRules()

Returns:

set of inference rules contained in the graph

updateRules

public Set<Rule> updateRules(SchemaConcept type,
                             Rule rule)

Parameters:

type - to be update

rule - to be appended

Returns:

updated entry vlue

getRulesWithType

public java.util.stream.Stream<Rule> getRulesWithType(SchemaConcept type)

Parameters:

type - for which rules containing it in the head are sought

Returns:

rules containing specified type in the head

getRulesWithType

public java.util.stream.Stream<Rule> getRulesWithType(SchemaConcept type,
                                                      boolean direct)

Parameters:

type - for which rules containing it in the head are sought

direct - way of assessing isa edges

Returns:

rules containing specified type in the head

getRule

public <T> T getRule(Rule rule,
                     java.util.function.Supplier<T> converter)

Type Parameters:

T - type of object converter converts to

Parameters:

rule - for which the parsed rule should be retrieved

converter - rule converter

Returns:

parsed rule object

closeTx

public void closeTx()

cleans cache contents