ai.grakn.kb.internal.concept

Class ThingImpl<T extends Thing,V extends Type>

java.lang.Object

ai.grakn.kb.internal.concept.ConceptImpl

ai.grakn.kb.internal.concept.ThingImpl<T,V>

Type Parameters:

T - The leaf interface of the object concept which extends Thing. For example Entity or Relationship.

V - The type of the concept which extends Type of the concept. For example EntityType or RelationshipType

All Implemented Interfaces:

Concept, Thing, CacheOwner, ConceptVertex

Direct Known Subclasses:

AttributeImpl, EntityImpl, RelationshipReified

public abstract class ThingImpl<T extends Thing,V extends Type>
extends ConceptImpl
implements Thing

A data instance in the graph belonging to a specific Type

Instances represent data in the graph. Every instance belongs to a Type which serves as a way of categorising them. Instances can relate to one another via Relationship

Author:

fppt

Method Summary

Modifier and Type	Method and Description
T	attributeInferred(Attribute attribute)
java.util.stream.Stream<Attribute<?>>	attributes(AttributeType... attributeTypes)
void	delete() Deletes the concept as an Thing
String	getIndex() This index is used by concepts such as casting and relations to speed up internal lookups
T	has(Attribute attribute)
boolean	isInferred()
java.util.stream.Stream<Attribute<?>>	keys(AttributeType... attributeTypes)
java.util.stream.Stream<Relationship>	relationships(Role... roles)
Relationship	relhas(Attribute attribute)
java.util.stream.Stream<Role>	roles()
V	type()
T	unhas(Attribute attribute)

Methods inherited from class ai.grakn.kb.internal.concept.ConceptImpl

baseType, caches, createShard, currentShard, deleteNode, equals, hashCode, id, isDeleted, keyspace, shardCount, shards, toString, vertex

Methods inherited from class java.lang.Object

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

Methods inherited from interface ai.grakn.concept.Thing

asThing, isThing

Methods inherited from interface ai.grakn.concept.Concept

asAttribute, asAttributeType, asEntity, asEntityType, asRelationship, asRelationshipType, asRole, asRule, asSchemaConcept, asType, id, isAttribute, isAttributeType, isDeleted, isEntity, isEntityType, isRelationship, isRelationshipType, isRole, isRule, isSchemaConcept, isType, keyspace

Methods inherited from interface ai.grakn.kb.internal.concept.ConceptVertex

from

Methods inherited from interface ai.grakn.kb.internal.cache.CacheOwner

from, registerCache, txCacheClear, txCacheFlush

Method Detail

isInferred

public boolean isInferred()

Specified by:

isInferred in interface Thing

delete

public void delete()

Deletes the concept as an Thing

Specified by:

delete in interface Concept

Overrides:

delete in class ConceptImpl

getIndex

public String getIndex()

This index is used by concepts such as casting and relations to speed up internal lookups

Returns:

The inner index value of some concepts.

attributes

public java.util.stream.Stream<Attribute<?>> attributes(AttributeType... attributeTypes)

Specified by:

attributes in interface Thing

keys

public java.util.stream.Stream<Attribute<?>> keys(AttributeType... attributeTypes)

Specified by:

keys in interface Thing

relationships

public java.util.stream.Stream<Relationship> relationships(Role... roles)

Specified by:

relationships in interface Thing

Parameters:

roles - An optional parameter which allows you to specify the role of the relations you wish to retrieve.

Returns:

A set of Relations which the concept instance takes part in, optionally constrained by the Role Type.

roles

public java.util.stream.Stream<Role> roles()

Specified by:

roles in interface Thing

has

public T has(Attribute attribute)

Specified by:

has in interface Thing

attributeInferred

public T attributeInferred(Attribute attribute)

relhas

public Relationship relhas(Attribute attribute)

Specified by:

relhas in interface Thing

unhas

public T unhas(Attribute attribute)

Specified by:

unhas in interface Thing

type

public V type()

Specified by:

type in interface Thing

Returns:

The type of the concept casted to the correct interface