ai.grakn.kb.internal.concept

Class RoleImpl

java.lang.Object

ai.grakn.kb.internal.concept.ConceptImpl

ai.grakn.kb.internal.concept.SchemaConceptImpl<Role>

ai.grakn.kb.internal.concept.RoleImpl

All Implemented Interfaces:

Concept, Role, SchemaConcept, CacheOwner, ConceptVertex

public class RoleImpl
extends SchemaConceptImpl<Role>
implements Role

An SchemaConcept which defines a Role which can be played in a RelationshipType.

This SchemaConcept defines the roles which make up a RelationshipType. It has some additional functionality: 1. It cannot play a Role to itself. 2. It is special in that it is unique to RelationshipTypes.

Author:

fppt

Method Summary

Modifier and Type	Method and Description
static RoleImpl	create(VertexElement vertexElement, Role type)
static RoleImpl	get(VertexElement vertexElement)
java.util.stream.Stream<Type>	players()
java.util.stream.Stream<RelationshipType>	relationships()
java.util.stream.Stream<Casting>	rolePlayers()

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

delete, from, innerToString, isImplicit, label, label, labelId, subs, sup, sup, sups, thenRules, whenRules

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.Role

asRole, isRole, label, subs, sup, sup, sups

Methods inherited from interface ai.grakn.concept.SchemaConcept

asSchemaConcept, isImplicit, isSchemaConcept, label, labelId, thenRules, whenRules

Methods inherited from interface ai.grakn.concept.Concept

asAttribute, asAttributeType, asEntity, asEntityType, asRelationship, asRelationshipType, asRule, asThing, asType, delete, id, isAttribute, isAttributeType, isDeleted, isEntity, isEntityType, isRelationship, isRelationshipType, isRule, isThing, 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

get

public static RoleImpl get(VertexElement vertexElement)

create

public static RoleImpl create(VertexElement vertexElement,
                              Role type)

relationships

public java.util.stream.Stream<RelationshipType> relationships()

Specified by:

relationships in interface Role

players

public java.util.stream.Stream<Type> players()

Specified by:

players in interface Role

Returns:

A list of all the Concept Types which can play this role.

rolePlayers

public java.util.stream.Stream<Casting> rolePlayers()

Returns:

Get all the roleplayers of this role type