ai.grakn.kb.internal.concept

Class TypeImpl<T extends Type,V extends Thing>

java.lang.Object

ai.grakn.kb.internal.concept.ConceptImpl

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

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

Type Parameters:

T - The leaf interface of the object concept. For example an EntityType or RelationshipType

V - The instance of this type. For example Entity or Relationship

All Implemented Interfaces:

Concept, SchemaConcept, Type, ContainsTxCache, ConceptVertex, Comparable<Concept>

Direct Known Subclasses:

AttributeTypeImpl, EntityTypeImpl, RelationshipTypeImpl

public class TypeImpl<T extends Type,V extends Thing>
extends SchemaConceptImpl<T>
implements Type

A Type represents any ontological element in the graph.

Types are used to model the behaviour of Thing and how they relate to each other. They also aid in categorising Thing to different types.

Author:

fppt

Field Summary

Fields

Modifier and Type	Field and Description
protected org.slf4j.Logger	LOG

Method Summary

Modifier and Type	Method and Description
T	attribute(AttributeType attributeType)
java.util.stream.Stream<AttributeType>	attributes()
void	delete() Deletes the concept as type
T	deleteAttribute(AttributeType attributeType)
T	deleteKey(AttributeType attributeType)
T	deletePlays(Role role)
Map<Role,Boolean>	directPlays()
static <X extends Type,Y extends Thing> TypeImpl<X,Y>	from(Type type)
java.util.stream.Stream<V>	instances()
Boolean	isAbstract()
T	key(AttributeType attributeType)
java.util.stream.Stream<AttributeType>	keys()
java.util.stream.Stream<Role>	plays()
T	plays(Role role)
T	plays(Role role, boolean required)
T	property(Schema.VertexProperty key, Object value)
T	setAbstract(Boolean isAbstract)
void	txCacheClear() Clears the internal transaction caches
void	txCacheFlush() Flushes the internal transaction caches so they can refresh with persisted graph

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

from, getLabel, getLabelId, getRulesOfConclusion, getRulesOfHypothesis, innerToString, isImplicit, setLabel, sub, subs, sup, sup, superSet

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

addEdge, baseType, compareTo, createShard, currentShard, deleteNode, equals, getId, getShardCount, hashCode, isDeleted, setShardCount, 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.Type

asType, isType, setLabel, subs, sup

Methods inherited from interface ai.grakn.concept.SchemaConcept

asSchemaConcept, getLabel, getLabelId, getRulesOfConclusion, getRulesOfHypothesis, isImplicit, isSchemaConcept

Methods inherited from interface ai.grakn.concept.Concept

asAttribute, asAttributeType, asEntity, asEntityType, asRelationship, asRelationshipType, asRole, asRule, asThing, getId, isAttribute, isAttributeType, isDeleted, isEntity, isEntityType, isRelationship, isRelationshipType, isRole, isRule, isThing

Methods inherited from interface java.lang.Comparable

compareTo

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

from

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

from

Field Detail

LOG

protected final org.slf4j.Logger LOG

Method Detail

txCacheFlush

public void txCacheFlush()

Flushes the internal transaction caches so they can refresh with persisted graph

Overrides:

txCacheFlush in class SchemaConceptImpl<T extends Type>

txCacheClear

public void txCacheClear()

Clears the internal transaction caches

Specified by:

txCacheClear in interface ContainsTxCache

Overrides:

txCacheClear in class SchemaConceptImpl<T extends Type>

plays

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

Specified by:

plays in interface Type

Returns:

A list of all the roles this Type is allowed to play.

attributes

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

Specified by:

attributes in interface Type

keys

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

Specified by:

keys in interface Type

directPlays

public Map<Role,Boolean> directPlays()

delete

public void delete()

Deletes the concept as type

Specified by:

delete in interface Concept

Overrides:

delete in class SchemaConceptImpl<T extends Type>

instances

public java.util.stream.Stream<V> instances()

Specified by:

instances in interface Type

Returns:

All the instances of this type.

isAbstract

public Boolean isAbstract()

Specified by:

isAbstract in interface Type

plays

public T plays(Role role,
               boolean required)

plays

public T plays(Role role)

Specified by:

plays in interface Type

Parameters:

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

Returns:

The Type itself.

deletePlays

public T deletePlays(Role role)

Specified by:

deletePlays in interface Type

deleteAttribute

public T deleteAttribute(AttributeType attributeType)

Specified by:

deleteAttribute in interface Type

deleteKey

public T deleteKey(AttributeType attributeType)

Specified by:

deleteKey in interface Type

setAbstract

public T setAbstract(Boolean isAbstract)

Specified by:

setAbstract in interface Type

Parameters:

isAbstract - Specifies if the concept is abstract (true) or not (false). If the concept type is abstract it is not allowed to have any instances.

Returns:

The Type itself.

property

public T property(Schema.VertexProperty key,
                  Object value)

attribute

public T attribute(AttributeType attributeType)

Specified by:

attribute in interface Type

key

public T key(AttributeType attributeType)

Specified by:

key in interface Type

from

public static <X extends Type,Y extends Thing> TypeImpl<X,Y> from(Type type)