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EntityTuplizer (Hibernate API Documentation) - Hibernate 3.2.3 正式版 API 英文文档

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org.hibernate.tuple.entity
Interface EntityTuplizer

All Superinterfaces:

Tuplizer

All Known Implementing Classes:

AbstractEntityTuplizer

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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

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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.
Class	getConcreteProxyClass()           Returns the java class to which generated proxies will be typed.
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

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

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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.

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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

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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.

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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

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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

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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

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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

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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

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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.

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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.

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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.

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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.

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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.

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getConcreteProxyClass

public Class getConcreteProxyClass()

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

Returns:

The java class to which generated proxies will be typed

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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.

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isInstrumented

public boolean isInstrumented()

Is it an instrumented POJO?

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