com.googlecode.objectify.impl

Class ConcreteEntityMetadata<T>

java.lang.Object

com.googlecode.objectify.impl.ConcreteEntityMetadata<T>

All Implemented Interfaces:

EntityMetadata<T>

public class ConcreteEntityMetadata<T>
extends Object
implements EntityMetadata<T>

Knows how to map between datastore Entity objects and your typed POJO objects. An instance of this class knows how to perform mapping of a specific subclass.

Author:

Jeff Schnitzer

Field Summary

Fields

Modifier and Type	Field and Description
protected Cache	cached The cached annotation, or null if entity should not be cached
protected Class<T>	entityClass
protected ObjectifyFactory	fact
protected List<Method>	onLoadMethods Any methods in the hierarchy annotated with @OnLoad, could be null
protected List<Method>	onSaveMethods Any methods in the hierarchy annotated with @OnSave, could be null
protected Transmog<T>	transmog For translating between pojos and entities

Constructor Summary

Constructors

Constructor and Description
ConcreteEntityMetadata(ObjectifyFactory fact, Class<T> clazz) Inspects and stores the metadata for a particular entity class.

Method Summary

Methods

Modifier and Type	Method and Description
Integer	getCacheExpirySeconds() Get the expiry associated with this kind, defined by the @Cached annotation.
Class<T>	getEntityClass() Gets the class associated with this entity.
KeyMetadata<T>	getKeyMetadata() Get specific metadata about the key for this type.
Transmog<T>	getTransmog() Just for testing purposes; not part of the EntityMetadata interface
T	load(com.google.appengine.api.datastore.Entity ent, LoadContext ctx) Converts an entity to an object of the appropriate type for this metadata structure.
com.google.appengine.api.datastore.Entity	save(T pojo, SaveContext ctx) Converts an object to a datastore Entity with the appropriate Key type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

fact

protected ObjectifyFactory fact

entityClass

protected Class<T> entityClass

onSaveMethods

protected List<Method> onSaveMethods

Any methods in the hierarchy annotated with @OnSave, could be null

onLoadMethods

protected List<Method> onLoadMethods

Any methods in the hierarchy annotated with @OnLoad, could be null

transmog

protected Transmog<T> transmog

For translating between pojos and entities

cached

protected Cache cached

The cached annotation, or null if entity should not be cached

Constructor Detail

ConcreteEntityMetadata

public ConcreteEntityMetadata(ObjectifyFactory fact,
                      Class<T> clazz)

Inspects and stores the metadata for a particular entity class.

Parameters:

clazz - must be a properly-annotated Objectify entity class.

Method Detail

getCacheExpirySeconds

public Integer getCacheExpirySeconds()

Description copied from interface: EntityMetadata

Get the expiry associated with this kind, defined by the @Cached annotation. For polymorphic types, this is always the instruction on the root @Entity - you cannot provide per-type caching.

Specified by:

getCacheExpirySeconds in interface EntityMetadata<T>

Returns:

null means DO NOT CACHE, 0 means "no limit", otherwise # of seconds

load

public T load(com.google.appengine.api.datastore.Entity ent,
     LoadContext ctx)

Description copied from interface: EntityMetadata

Converts an entity to an object of the appropriate type for this metadata structure. Does not check that the entity is appropriate; that should be done when choosing which EntityMetadata to call.

Specified by:

load in interface EntityMetadata<T>

save

public com.google.appengine.api.datastore.Entity save(T pojo,
                                             SaveContext ctx)

Description copied from interface: EntityMetadata

Converts an object to a datastore Entity with the appropriate Key type.

Specified by:

save in interface EntityMetadata<T>

getEntityClass

public Class<T> getEntityClass()

Description copied from interface: EntityMetadata

Gets the class associated with this entity.

Specified by:

getEntityClass in interface EntityMetadata<T>

getKeyMetadata

public KeyMetadata<T> getKeyMetadata()

Description copied from interface: EntityMetadata

Get specific metadata about the key for this type.

Specified by:

getKeyMetadata in interface EntityMetadata<T>

getTransmog

public Transmog<T> getTransmog()

Just for testing purposes; not part of the EntityMetadata interface