org.hibernate.tuple.entity
Interface EntityTuplizer

All Superinterfaces:

Tuplizer

All Known Implementing Classes:

AbstractEntityTuplizer

public interface EntityTuplizer

extends Tuplizer

Defines further responsibilities reagarding tuplization based on a mapped entity.

EntityTuplizer implementations should have the following constructor signature: (org.hibernate.tuple.entity.EntityMetamodel, org.hibernate.mapping.PersistentClass)

Author:

Gavin King, Steve Ebersole

Method Summary

void	afterInitialize(Object entity, boolean lazyPropertiesAreUnfetched, SessionImplementor session) Called just after the entities properties have been initialized.
Object	createProxy(Serializable id, SessionImplementor session) Generates an appropriate proxy representation of this entity for this entity-mode.
String	determineConcreteSubclassEntityName(Object entityInstance, SessionFactoryImplementor factory) Given an entity instance, determine the most appropriate (most targeted) entity-name which represents it.
Class	getConcreteProxyClass() Returns the java class to which generated proxies will be typed.
EntityMode	getEntityMode() Return the entity-mode handled by this tuplizer instance.
EntityNameResolver[]	getEntityNameResolvers() Get any EntityNameResolvers associated with this Tuplizer.
Serializable	getIdentifier(Object entity) Extract the identifier value from the given entity.
Object	getPropertyValue(Object entity, String propertyName) Extract the value of a particular property from the given entity.
Object[]	getPropertyValuesToInsert(Object entity, Map mergeMap, SessionImplementor session) Extract the values of the insertable properties of the entity (including backrefs)
Object	getVersion(Object entity) Extract the value of the version property from the given entity.
boolean	hasProxy() Does this entity, for this mode, present a possibility for proxying?
boolean	hasUninitializedLazyProperties(Object entity) Does the given entity instance have any currently uninitialized lazy properties?
Object	instantiate(Serializable id) Create an entity instance initialized with the given identifier.
boolean	isInstrumented() Is it an instrumented POJO?
boolean	isLifecycleImplementor() Does the class managed by this tuplizer implement the Lifecycle interface.
boolean	isValidatableImplementor() Does the class managed by this tuplizer implement the Validatable interface.
void	resetIdentifier(Object entity, Serializable currentId, Object currentVersion) Inject the given identifier and version into the entity, in order to "roll back" to their original values.
void	setIdentifier(Object entity, Serializable id) Inject the identifier value into the given entity.
void	setPropertyValue(Object entity, int i, Object value) Inject the value of a particular property.
void	setPropertyValue(Object entity, String propertyName, Object value) Inject the value of a particular property.

Methods inherited from interface org.hibernate.tuple.Tuplizer

getMappedClass, getPropertyValue, getPropertyValues, instantiate, isInstance, setPropertyValues

Method Detail

getEntityMode

public EntityMode getEntityMode()

Return the entity-mode handled by this tuplizer instance.

Returns:

The entity-mode

instantiate

public Object instantiate(Serializable id)
                   throws HibernateException

Create an entity instance initialized with the given identifier.

Parameters:

id - The identifier value for the entity to be instantiated.

Returns:

The instantiated entity.

Throws:

HibernateException

getIdentifier

public Serializable getIdentifier(Object entity)
                           throws HibernateException

Extract the identifier value from the given entity.

Parameters:

entity - The entity from which to extract the identifier value.

Returns:

The identifier value.

Throws:

HibernateException - If the entity does not define an identifier property, or an error occurrs accessing its value.

setIdentifier

public void setIdentifier(Object entity,
                          Serializable id)
                   throws HibernateException

Inject the identifier value into the given entity.

Has no effect if the entity does not define an identifier property

Parameters:

entity - The entity to inject with the identifier value.

id - The value to be injected as the identifier.

Throws:

HibernateException

resetIdentifier

public void resetIdentifier(Object entity,
                            Serializable currentId,
                            Object currentVersion)

Inject the given identifier and version into the entity, in order to "roll back" to their original values.

Parameters:

currentId - The identifier value to inject into the entity.

currentVersion - The version value to inject into the entity.

getVersion

public Object getVersion(Object entity)
                  throws HibernateException

Extract the value of the version property from the given entity.

Parameters:

entity - The entity from which to extract the version value.

Returns:

The value of the version property, or null if not versioned.

Throws:

HibernateException

setPropertyValue

public void setPropertyValue(Object entity,
                             int i,
                             Object value)
                      throws HibernateException

Inject the value of a particular property.

Parameters:

entity - The entity into which to inject the value.

i - The property's index.

value - The property value to inject.

Throws:

HibernateException

setPropertyValue

public void setPropertyValue(Object entity,
                             String propertyName,
                             Object value)
                      throws HibernateException

Inject the value of a particular property.

Parameters:

entity - The entity into which to inject the value.

propertyName - The name of the property.

value - The property value to inject.

Throws:

HibernateException

getPropertyValuesToInsert

public Object[] getPropertyValuesToInsert(Object entity,
                                          Map mergeMap,
                                          SessionImplementor session)
                                   throws HibernateException

Extract the values of the insertable properties of the entity (including backrefs)

Parameters:

entity - The entity from which to extract.

mergeMap - a map of instances being merged to merged instances

session - The session in which the resuest is being made.

Returns:

The insertable property values.

Throws:

HibernateException

getPropertyValue

public Object getPropertyValue(Object entity,
                               String propertyName)
                        throws HibernateException

Extract the value of a particular property from the given entity.

Parameters:

entity - The entity from which to extract the property value.

propertyName - The name of the property for which to extract the value.

Returns:

The current value of the given property on the given entity.

Throws:

HibernateException

afterInitialize

public void afterInitialize(Object entity,
                            boolean lazyPropertiesAreUnfetched,
                            SessionImplementor session)

Called just after the entities properties have been initialized.

Parameters:

entity - The entity being initialized.

lazyPropertiesAreUnfetched - Are defined lazy properties currently unfecthed

session - The session initializing this entity.

hasProxy

public boolean hasProxy()

Does this entity, for this mode, present a possibility for proxying?

Returns:

True if this tuplizer can generate proxies for this entity.

createProxy

public Object createProxy(Serializable id,
                          SessionImplementor session)
                   throws HibernateException

Generates an appropriate proxy representation of this entity for this entity-mode.

Parameters:

id - The id of the instance for which to generate a proxy.

session - The session to which the proxy should be bound.

Returns:

The generate proxies.

Throws:

HibernateException - Indicates an error generating the proxy.

isLifecycleImplementor

public boolean isLifecycleImplementor()

Does the class managed by this tuplizer implement the Lifecycle interface.

Returns:

True if the Lifecycle interface is implemented; false otherwise.

isValidatableImplementor

public boolean isValidatableImplementor()

Does the class managed by this tuplizer implement the Validatable interface.

Returns:

True if the Validatable interface is implemented; false otherwise.

getConcreteProxyClass

public Class getConcreteProxyClass()

Returns the java class to which generated proxies will be typed.

todo : look at fully encapsulating PersistenceContext.narrowProxy(java.lang.Object, org.hibernate.persister.entity.EntityPersister, org.hibernate.engine.EntityKey, java.lang.Object) here, since that is the only external use of this method

Returns:

The java class to which generated proxies will be typed

hasUninitializedLazyProperties

public boolean hasUninitializedLazyProperties(Object entity)

Does the given entity instance have any currently uninitialized lazy properties?

Parameters:

entity - The entity to be check for uninitialized lazy properties.

Returns:

True if uninitialized lazy properties were found; false otherwise.

isInstrumented

public boolean isInstrumented()

Is it an instrumented POJO?

getEntityNameResolvers

public EntityNameResolver[] getEntityNameResolvers()

Get any EntityNameResolvers associated with this Tuplizer.

Returns:

The associated resolvers. May be null or empty.

determineConcreteSubclassEntityName

public String determineConcreteSubclassEntityName(Object entityInstance,
                                                  SessionFactoryImplementor factory)

Given an entity instance, determine the most appropriate (most targeted) entity-name which represents it. This is called in situations where we already know an entity name for the given entityInstance; we are being asked to determine if there is a more appropriate entity-name to use, specifically within an inheritence hierarchy.

For example, consider a case where a user calls session.update( "Animal", cat );. Here, the user has explicitly provided Animal as the entity-name. However, they have passed in an instance of Cat which is a subclass of Animal. In this case, we would return Cat as the entity-name.

null may be returned from calls to this method. The meaining of null in that case is assumed to be that we should use whatever explicit entity-name the user provided (Animal rather than Cat in the example above).

Parameters:

entityInstance - The entity instance.

factory - Reference to the SessionFactory.

Returns:

The most appropriate entity name to use.

Throws:

HibernateException - If we are unable to determine an entity-name within the inheritence hierarchy.