Uses of Class
com.google.appengine.api.datastore.Key

Packages that use Key

Package	Description
com.google.appengine.api.datastore	Provides persistent storage, also accessible via JDO or JPA interfaces.

Uses of Key in com.google.appengine.api.datastore

Methods in com.google.appengine.api.datastore that return Key

Modifier and Type	Method	Description
Key	AdminDatastoreService.KeyBuilder.build()
static Key	Entities.createEntityGroupKey(Key key)	Create an __entity_group__ key for the entity group containing key.
static Key	ExtendableEntityUtil.createKey(Key parent, String kind)	Creates a new Key with the provided parent and kind.
static Key	KeyFactory.createKey(@Nullable Key parent, String kind, long id)	Creates a new Key with the provided parent from its kind and ID.
static Key	KeyFactory.createKey(@Nullable Key parent, String kind, String name)	Creates a new Key with the provided parent from its kind and name.
static Key	KeyFactory.createKey(String kind, long id)	Creates a new Key having no parent from its kind and ID.
static Key	KeyFactory.createKey(String kind, String name)	Creates a new Key having no parent from its kind and name.
static Key	Entities.createKindKey(String kind)	Create a __kind__ key for kind.
static Key	Entities.createNamespaceKey(String namespace)	Create a __namespace__ key for namespace.
static Key	Entities.createPropertyKey(String kind, String property)	Create a __property__ key for property of kind.
Key	Query.getAncestor()	Gets the current ancestor for this query, or null if there is no ancestor specified.
Key	Key.getChild(String kind, long id)	Creates a new key having this as parent and the given numeric identifier.
Key	Key.getChild(String kind, String name)	Creates a new key having this as parent and the given name.
Key	KeyRange.getEnd()	Returns the last Key in the range.
@Nullable Key	EmbeddedEntity.getKey()	Returns the key or null.
Key	Entity.getKey()	Returns the Key that represents this Entity.
Key	EntityNotFoundException.getKey()
Key	KeyFactory.Builder.getKey()	Returns the most recently added Key.
@Nullable Key	Entity.getParent()	Get a Key that corresponds to this the parent Entity of this Entity.
@Nullable Key	Key.getParent()	If this Key has a parent, return a Key that represents it.
Key	KeyRange.getStart()	Returns the first Key in the range.
Key	DatastoreService.put(Entity entity)	If the specified Entity does not yet exist in the data store, create it and assign its Key.
Key	DatastoreService.put(Transaction txn, Entity entity)	Exhibits the same behavior as DatastoreService.put(Entity), but executes within the provided transaction.
static Key	KeyFactory.stringToKey(String encoded)	Converts a String-representation of a Key into the Key instance it represents.

Methods in com.google.appengine.api.datastore that return types with arguments of type Key

Modifier and Type	Method	Description
Future<Map<Key,Entity>>	AdminDatastoreService.get(@Nullable Transaction txn, Iterable<Key> keys)
Future<Map<Key,Entity>>	AdminDatastoreService.get(Iterable<Key> keys)
Future<Map<Key,Entity>>	AsyncDatastoreService.get(@Nullable Transaction txn, Iterable<Key> keys)	See DatastoreService.get(Transaction, Iterable).
Future<Map<Key,Entity>>	AsyncDatastoreService.get(Iterable<Key> keys)	See DatastoreService.get(Iterable).
Map<Key,Entity>	DatastoreService.get(Transaction txn, Iterable<Key> keys)	Exhibits the same behavior as DatastoreService.get(Iterable), but executes within the provided transaction.
Map<Key,Entity>	DatastoreService.get(Iterable<Key> keys)	Retrieves the set of Entities matching keys.
Iterator<Key>	KeyRange.iterator()
Future<Key>	AdminDatastoreService.put(@Nullable Transaction txn, Entity entity)
Future<List<Key>>	AdminDatastoreService.put(@Nullable Transaction txn, Iterable<Entity> entities)
Future<Key>	AdminDatastoreService.put(Entity entity)
Future<List<Key>>	AdminDatastoreService.put(Iterable<Entity> entities)
Future<Key>	AsyncDatastoreService.put(@Nullable Transaction txn, Entity entity)	See DatastoreService.put(Transaction, Entity).
Future<List<Key>>	AsyncDatastoreService.put(@Nullable Transaction txn, Iterable<Entity> entities)	See DatastoreService.put(Transaction, Iterable).
Future<Key>	AsyncDatastoreService.put(Entity entity)	See DatastoreService.put(Entity).
Future<List<Key>>	AsyncDatastoreService.put(Iterable<Entity> entities)	See DatastoreService.put(Iterable).
List<Key>	DatastoreService.put(Transaction txn, Iterable<Entity> entities)	Exhibits the same behavior as DatastoreService.put(Iterable), but executes within the provided transaction.
List<Key>	DatastoreService.put(Iterable<Entity> entities)	Performs a batch put of all entities.

Methods in com.google.appengine.api.datastore with parameters of type Key

Modifier and Type	Method	Description
Future<KeyRange>	AdminDatastoreService.allocateIds(@Nullable Key parent, String kind, long num)
Future<KeyRange>	AsyncDatastoreService.allocateIds(@Nullable Key parent, String kind, long num)	See DatastoreService.allocateIds(Key, String, long).
KeyRange	DatastoreService.allocateIds(Key parent, String kind, long num)	IDs are allocated within a namespace defined by a parent key and a kind.
static boolean	ExtendableEntityUtil.areKeysEqual(Key key1, Key key2)	Check if the input Key objects are equal (including keys that are incomplete).
int	Key.compareTo(Key other)	Compares two Key objects.
static Key	Entities.createEntityGroupKey(Key key)	Create an __entity_group__ key for the entity group containing key.
static Key	ExtendableEntityUtil.createKey(Key parent, String kind)	Creates a new Key with the provided parent and kind.
static Key	KeyFactory.createKey(@Nullable Key parent, String kind, long id)	Creates a new Key with the provided parent from its kind and ID.
static Key	KeyFactory.createKey(@Nullable Key parent, String kind, String name)	Creates a new Key with the provided parent from its kind and name.
static String	KeyFactory.createKeyString(@Nullable Key parent, String kind, long id)	Shorthand for invoking KeyFactory.keyToString(Key) on the result of KeyFactory.createKey(Key, String, long)
static String	KeyFactory.createKeyString(@Nullable Key parent, String kind, String name)	Shorthand for invoking KeyFactory.keyToString(Key) on the result of KeyFactory.createKey(Key, String, String)
Future<Void>	AdminDatastoreService.delete(@Nullable Transaction txn, Key... keys)
Future<Void>	AdminDatastoreService.delete(Key... keys)
Future<Void>	AsyncDatastoreService.delete(@Nullable Transaction txn, Key... keys)	See DatastoreService.delete(Transaction, Iterable).
Future<Void>	AsyncDatastoreService.delete(Key... keys)	See DatastoreService.delete(Key...).
void	DatastoreService.delete(Key... keys)	Deletes the Entity entities specified by keys.
void	DatastoreService.delete(Transaction txn, Key... keys)	Exhibits the same behavior as DatastoreService.delete(Key...), but executes within the provided transaction.
Future<Entity>	AdminDatastoreService.get(@Nullable Transaction txn, Key key)
Future<Entity>	AdminDatastoreService.get(Key key)
Future<Entity>	AsyncDatastoreService.get(@Nullable Transaction txn, Key key)	See DatastoreService.get(Transaction, Key).
Future<Entity>	AsyncDatastoreService.get(Key key)	See DatastoreService.get(Key).
Entity	DatastoreService.get(Key key)	Retrieves the Entity with the specified Key.
Entity	DatastoreService.get(Transaction txn, Key key)	Exhibits the same behavior as DatastoreService.get(Key), but executes within the provided transaction.
static @Nullable String	Entities.getNamespaceFromNamespaceKey(Key namespaceKey)	Extract the namespace name from a __namespace__ key.
static String	KeyFactory.keyToString(Key key)	Converts a Key into a websafe string.
Query	Query.setAncestor(Key ancestor)	Sets an ancestor for this query.
void	EmbeddedEntity.setKey(@Nullable Key key)

Method parameters in com.google.appengine.api.datastore with type arguments of type Key

Modifier and Type	Method	Description
Future<Void>	AdminDatastoreService.delete(@Nullable Transaction txn, Iterable<Key> keys)
Future<Void>	AdminDatastoreService.delete(Iterable<Key> keys)
Future<Void>	AsyncDatastoreService.delete(@Nullable Transaction txn, Iterable<Key> keys)	See DatastoreService.delete(Transaction, Iterable).
Future<Void>	AsyncDatastoreService.delete(Iterable<Key> keys)	See DatastoreService.delete(Iterable).
void	DatastoreService.delete(Transaction txn, Iterable<Key> keys)	Exhibits the same behavior as DatastoreService.delete(Iterable), but executes within the provided transaction.
void	DatastoreService.delete(Iterable<Key> keys)	Equivalent to DatastoreService.delete(Key...).
Future<Map<Key,Entity>>	AdminDatastoreService.get(@Nullable Transaction txn, Iterable<Key> keys)
Future<Map<Key,Entity>>	AdminDatastoreService.get(Iterable<Key> keys)
Future<Map<Key,Entity>>	AsyncDatastoreService.get(@Nullable Transaction txn, Iterable<Key> keys)	See DatastoreService.get(Transaction, Iterable).
Future<Map<Key,Entity>>	AsyncDatastoreService.get(Iterable<Key> keys)	See DatastoreService.get(Iterable).
Map<Key,Entity>	DatastoreService.get(Transaction txn, Iterable<Key> keys)	Exhibits the same behavior as DatastoreService.get(Iterable), but executes within the provided transaction.
Map<Key,Entity>	DatastoreService.get(Iterable<Key> keys)	Retrieves the set of Entities matching keys.

Constructors in com.google.appengine.api.datastore with parameters of type Key

Constructor	Description
Builder(Key key)	Create a Builder, establishing the provided Key as the topmost ancestor.
Entity(Key key)	Create a new Entity uniquely identified by the provided Key.
Entity(String kind, long id, Key parent)	Create a new Entity with the specified kind and ID and parent Entity.
Entity(String kind, @Nullable Key parent)	Create a new Entity with the specified kind and parent Entity.
Entity(String kind, String keyName, Key parent)	Create a new Entity with the specified kind, key name, and parent Entity.
EntityNotFoundException(Key key)
KeyRange(Key parent, String kind, long start, long end)
Query(@Nullable String kind, @Nullable Key ancestor)	Create a new Query that finds Entity objects with the specified kind and the specified ancestor.
Query(Key ancestor)	Create a new Query that finds Entity objects with the specified Key as an ancestor.