ai.grakn.concept

Interface EntityType

All Superinterfaces:

Comparable<Concept>, Concept, Type

public interface EntityType
extends Type

EntityType is a schema element which represents the categories instances of this type can fall within.

This class allows you to set and retrieve information about the EntityType, such as its sub- and supertypes.

Method Summary

Modifier and Type	Method and Description
Entity	addEntity() Creates and returns a new Entity instance.
EntityType	deletePlaysRole(RoleType roleType) Removes the RoleType to prevent instances of this EntityType from playing it.
Collection<Entity>	instances() Returns a collection of all Entity instances for this EntityType.
EntityType	playsRole(RoleType roleType) Sets the RoleType which instances of this EntityType may play.
EntityType	setAbstract(Boolean isAbstract) Sets the EntityType to be abstract - which prevents it from having any instances.
Collection<EntityType>	subTypes() Returns a collection of subtypes of this EntityType.
EntityType	superType() Returns the supertype of this EntityType.
EntityType	superType(EntityType type) Sets the supertype of the EntityType to be the EntityType specified.

Methods inherited from interface ai.grakn.concept.Type

getName, getRulesOfConclusion, getRulesOfHypothesis, hasResource, isAbstract, isImplicit, key, playsRoles

Methods inherited from interface ai.grakn.concept.Concept

asEntity, asEntityType, asInstance, asRelation, asRelationType, asResource, asResourceType, asRoleType, asRule, asRuleType, asType, delete, getId, isEntity, isEntityType, isInstance, isRelation, isRelationType, isResource, isResourceType, isRoleType, isRule, isRuleType, isType, type

Methods inherited from interface java.lang.Comparable

compareTo

Method Detail

setAbstract

EntityType setAbstract(Boolean isAbstract)

Sets the EntityType to be abstract - which prevents it from having any instances.

Specified by:

setAbstract in interface Type

Parameters:

isAbstract - Specifies if the EntityType is to be abstract (true) or not (false).

Returns:

The EntityType itself

superType

EntityType superType(EntityType type)

Sets the supertype of the EntityType to be the EntityType specified.

Parameters:

type - The supertype of this EntityType

Returns:

The EntityType itself

playsRole

EntityType playsRole(RoleType roleType)

Sets the RoleType which instances of this EntityType may play.

Specified by:

playsRole in interface Type

Parameters:

roleType - The Role Type which the instances of this EntityType are allowed to play.

Returns:

The EntityType itself

deletePlaysRole

EntityType deletePlaysRole(RoleType roleType)

Removes the RoleType to prevent instances of this EntityType from playing it.

Specified by:

deletePlaysRole in interface Type

Parameters:

roleType - The Role Type which the instances of this EntityType should no longer be allowed to play.

Returns:

The EntityType itself

addEntity

Entity addEntity()

Creates and returns a new Entity instance.

Returns:

a new empty entity.

See Also:

Entity

superType

EntityType superType()

Returns the supertype of this EntityType.

Specified by:

superType in interface Type

Returns:

The supertype of this EntityType

subTypes

Collection<EntityType> subTypes()

Returns a collection of subtypes of this EntityType.

Specified by:

subTypes in interface Type

Returns:

All the sub classes of this EntityType

instances

Collection<Entity> instances()

Returns a collection of all Entity instances for this EntityType.

Specified by:

instances in interface Type

Returns:

All the instances of this EntityType.

See Also:

Entity