程序包 org.hibernate

接口 IdentifierLoadAccess<T>

public interface IdentifierLoadAccess<T>

Loads an entity by its primary identifier.

作者:

Eric Dalquist, Steve Ebersole

方法概要

修饰符和类型	方法	说明
T	getReference(Serializable id)	Return the persistent instance with the given identifier, assuming that the instance exists.
T	load(Serializable id)	Return the persistent instance with the given identifier, or null if there is no such persistent instance.
Optional<T>	loadOptional(Serializable id)	Same semantic as load(java.io.Serializable) except that here Optional is returned to handle nullability.
IdentifierLoadAccess<T>	with(CacheMode cacheMode)	Specify the CacheMode to use when retrieving the entity.
default IdentifierLoadAccess<T>	with(RootGraph<T> graph)
IdentifierLoadAccess<T>	with(RootGraph<T> graph, GraphSemantic semantic)
IdentifierLoadAccess<T>	with(LockOptions lockOptions)	Specify the LockOptions to use when retrieving the entity.

方法详细资料

with

IdentifierLoadAccess<T> with(LockOptions lockOptions)

Specify the LockOptions to use when retrieving the entity.

参数:

lockOptions - The lock options to use.

返回:

this, for method chaining

with

IdentifierLoadAccess<T> with(CacheMode cacheMode)

Specify the CacheMode to use when retrieving the entity.

参数:

cacheMode - The CacheMode to use.

返回:

this, for method chaining

with

default IdentifierLoadAccess<T> with(RootGraph<T> graph)

with

IdentifierLoadAccess<T> with(RootGraph<T> graph,
                             GraphSemantic semantic)

getReference

T getReference(Serializable id)

Return the persistent instance with the given identifier, assuming that the instance exists. This method might return a proxied instance that is initialized on-demand, when a non-identifier method is accessed. You should not use this method to determine if an instance exists; to check for existence, use load(java.io.Serializable) instead. Use this only to retrieve an instance that you assume exists, where non-existence would be an actual error.

参数:

id - The identifier for which to obtain a reference

返回:

the persistent instance or proxy

load

T load(Serializable id)

Return the persistent instance with the given identifier, or null if there is no such persistent instance. If the instance is already associated with the session, return that instance, initializing it if needed. This method never returns an uninitialized instance.

参数:

id - The identifier

返回:

The persistent instance or null

loadOptional

Optional<T> loadOptional(Serializable id)

Same semantic as load(java.io.Serializable) except that here Optional is returned to handle nullability.

参数:

id - The identifier

返回:

The persistent instance, if one, wrapped in Optional