Package com.google.appengine.api.datastore

Class EmbeddedEntity

java.lang.Object

com.google.appengine.api.datastore.PropertyContainer

com.google.appengine.api.datastore.EmbeddedEntity

All Implemented Interfaces:

Serializable, Cloneable

public final class EmbeddedEntity
extends PropertyContainer

A property value containing embedded entity properties (and optionally a Key).

This class is similar to Entity, but differs in the following ways:

• equals(Object) and hashCode() compare the embedded properties in addition to the Key.
• It is not queryable when stored in the datastore.
• A Key is optional.
• Keys without a name or id are considered equal if all other aspects of the keys are equal (as they will not be assigned IDs by the datastore when embedded).

To convert from an Entity use:

 EmbeddedEntity sv = new EmbeddedEntity();
 sv.setKey(entity.getKey())
 sv.setPropertiesFrom(entity)
 

To convert to an Entity use:

 Entity entity = new Entity(sv.getKey())
 entity.setPropertiesFrom(sv);
 

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
EmbeddedEntity()

Method Summary

Modifier and Type	Method	Description
EmbeddedEntity	clone()
boolean	equals(@Nullable Object obj)
@Nullable Key	getKey()	Returns the key or null.
int	hashCode()
void	setKey(@Nullable Key key)
String	toString()

Methods inherited from class com.google.appengine.api.datastore.PropertyContainer

getProperties, getProperty, hasProperty, isUnindexedProperty, removeProperty, setIndexedProperty, setPropertiesFrom, setProperty, setUnindexedProperty

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Details

EmbeddedEntity

public EmbeddedEntity()

Method Details

getKey

public @Nullable Key getKey()

Returns the key or null.

setKey

public void setKey(@Nullable Key key)

Parameters:

key - the key to set

clone

public EmbeddedEntity clone()

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(@Nullable Object obj)

Overrides:

equals in class Object