Package org.hibernate.event.internal

Class DefaultResolveNaturalIdEventListener

java.lang.Object

org.hibernate.event.internal.DefaultResolveNaturalIdEventListener

All Implemented Interfaces:

ResolveNaturalIdEventListener

public class DefaultResolveNaturalIdEventListener
extends Object
implements ResolveNaturalIdEventListener

Defines the default load event listeners used by hibernate for loading entities in response to generated load events.

Constructor Summary

Constructors

Constructor	Description
DefaultResolveNaturalIdEventListener()

Method Summary

Modifier and Type	Method	Description
protected Object	loadFromDatasource(ResolveNaturalIdEvent event)	Performs the process of loading an entity from the configured underlying datasource.
void	onResolveNaturalId(ResolveNaturalIdEvent event)	Handle the given resolve natural id event.
protected Object	resolveFromCache(ResolveNaturalIdEvent event)	Attempts to resolve the entity id corresponding to the event's natural id values from the session
protected Object	resolveNaturalId(ResolveNaturalIdEvent event)	Coordinates the efforts to load a given entity.

Methods inherited from class java.lang.Object

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

Constructor Details

DefaultResolveNaturalIdEventListener

public DefaultResolveNaturalIdEventListener()

Method Details

onResolveNaturalId

public void onResolveNaturalId(ResolveNaturalIdEvent event)
                        throws HibernateException

Description copied from interface: ResolveNaturalIdEventListener

Handle the given resolve natural id event.

Specified by:

onResolveNaturalId in interface ResolveNaturalIdEventListener

Parameters:

event - The resolve natural id event to be handled.

Throws:

HibernateException - Indicates a problem resolving natural id to primary key

resolveNaturalId

protected Object resolveNaturalId(ResolveNaturalIdEvent event)

Coordinates the efforts to load a given entity. First, an attempt is made to load the entity from the session-level cache. If not found there, an attempt is made to locate it in second-level cache. Lastly, an attempt is made to load it directly from the datasource.

Parameters:

event - The load event

Returns:

The loaded entity, or null.

resolveFromCache

protected Object resolveFromCache(ResolveNaturalIdEvent event)

Attempts to resolve the entity id corresponding to the event's natural id values from the session

Parameters:

event - The load event

Returns:

The entity from the cache, or null.

loadFromDatasource

protected Object loadFromDatasource(ResolveNaturalIdEvent event)

Performs the process of loading an entity from the configured underlying datasource.

Parameters:

event - The load event

Returns:

The object loaded from the datasource, or null if not found.