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SimpleEntityLoader (Hibernate API Documentation) - Hibernate 2.1.8 正式版 API 英文文档

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net.sf.hibernate.loader
Class SimpleEntityLoader

java.lang.Object
  net.sf.hibernate.loader.Loader
      net.sf.hibernate.loader.SimpleEntityLoader

All Implemented Interfaces:

UniqueEntityLoader

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public final class SimpleEntityLoader

extends Loader

implements UniqueEntityLoader

Loads entity instances one instance per select, without without any outerjoin fetching.
The ClassPersister must implement Loadable. For other entities, create a customized subclass of Loader.

Author:

Gavin King

See Also:

EntityLoader

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Field Summary

 

Fields inherited from class net.sf.hibernate.loader.Loader

NO_SUFFIX

 

Constructor Summary

SimpleEntityLoader(Loadable persister, String sql, LockMode lockMode)

 

Method Summary
protected  CollectionPersister	getCollectionPersister()           An (optional) persister for a collection to be initialized; only collection loaders return a non-null value
protected  LockMode[]	getLockModes(Map lockModes)           What lock mode does this load entities with?
protected  int[]	getOwners()           An array of indexes of the entity that owns a one-to-one association to the entity at the given index (-1 if there is no "owner")
protected  Loadable[]	getPersisters()           An array of persisters of entity classes contained in each row of results; implemented by all subclasses
protected  Object	getResultColumnOrRow(Object[] row, ResultSet rs, SessionImplementor session)           Get the actual object that is returned in the user-visible result list.
protected  String	getSQLString()           The SQL query string to be called; implemented by all subclasses
protected  String[]	getSuffixes()           The suffix identifies a particular column of results in the SQL ResultSet; implemented by all subclasses
protected  boolean	isSingleRowLoader()           Return false is this loader is a batch entity loader
Object	load(SessionImplementor session, Serializable id, Object object)           Load an entity instance.

 

Methods inherited from class net.sf.hibernate.loader.Loader

applyLocks, bindNamedParameters, bindPositionalParameters, doList, generateAlias, generateSuffixes, getCollectionOwner, getResultList, getResultSet, list, loadCollection, loadCollectionBatch, loadEntity, loadEntityBatch, loadSingleRow, postInstantiate, prepareQueryStatement, upgradeLocks

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

SimpleEntityLoader

public SimpleEntityLoader(Loadable persister,
                          String sql,
                          LockMode lockMode)

Method Detail

getSQLString

protected String getSQLString()

Description copied from class: Loader

The SQL query string to be called; implemented by all subclasses

Specified by:

getSQLString in class Loader

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getPersisters

protected Loadable[] getPersisters()

Description copied from class: Loader

An array of persisters of entity classes contained in each row of results; implemented by all subclasses

Specified by:

getPersisters in class Loader

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getCollectionPersister

protected CollectionPersister getCollectionPersister()

Description copied from class: Loader

An (optional) persister for a collection to be initialized; only collection loaders return a non-null value

Specified by:

getCollectionPersister in class Loader

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getSuffixes

protected String[] getSuffixes()

Description copied from class: Loader

The suffix identifies a particular column of results in the SQL ResultSet; implemented by all subclasses

Specified by:

getSuffixes in class Loader

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load

public Object load(SessionImplementor session,
                   Serializable id,
                   Object object)
            throws HibernateException,
                   SQLException

Description copied from interface: UniqueEntityLoader

Load an entity instance. If optionalObject is supplied, load the entity state into the given (uninitialized) object.

Specified by:

load in interface UniqueEntityLoader

Throws:

HibernateException

SQLException

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getLockModes

protected LockMode[] getLockModes(Map lockModes)

Description copied from class: Loader

What lock mode does this load entities with?

Specified by:

getLockModes in class Loader

Parameters:

lockModes - a collection of lock modes specified dynamically via the Query interface

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getResultColumnOrRow

protected Object getResultColumnOrRow(Object[] row,
                                      ResultSet rs,
                                      SessionImplementor session)
                               throws SQLException,
                                      HibernateException

Description copied from class: Loader

Get the actual object that is returned in the user-visible result list. This empty implementation merely returns its first argument. This is overridden by some subclasses.

Overrides:

getResultColumnOrRow in class Loader

Throws:

SQLException

HibernateException

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isSingleRowLoader

protected boolean isSingleRowLoader()

Description copied from class: Loader

Return false is this loader is a batch entity loader

Overrides:

isSingleRowLoader in class Loader

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getOwners

protected int[] getOwners()

Description copied from class: Loader

An array of indexes of the entity that owns a one-to-one association to the entity at the given index (-1 if there is no "owner")

Specified by:

getOwners in class Loader

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