程序包 org.babyfish.jimmer.sql

接口 TransientResolver<ID,V>

类型参数:

ID -

V -

public interface TransientResolver<ID,V>

Only for java, kotlin developers should use `KTransientResolver`

方法概要

修饰符和类型	方法	说明
static @NotNull Connection	currentConnection()	Get the database connection should be used, it can be ignored if the current resolver is injected and the spring-transaction is enabled.
default V	getDefaultValue()	Please ignore this method if the current calculated property returns nullable type or LIST of entity objects
default org.babyfish.jimmer.lang.Ref<SortedMap<String,Object>>	getParameterMapRef()	Please ignore this method if cache for current calculated property is not enabled.
Map<ID,V>	resolve(Collection<ID> ids)

方法详细资料

resolve

Map<ID,V> resolve(Collection<ID> ids)

参数:

ids - A batch of ids of the current objects that are resolving calculated property, it is not null and not empty

返回:

A map contains resolved values

getDefaultValue

default V getDefaultValue()

Please ignore this method if the current calculated property returns nullable type or LIST of entity objects

返回:

Then default value, null will be ignored by jimmer.

getParameterMapRef

default org.babyfish.jimmer.lang.Ref<SortedMap<String,Object>> getParameterMapRef()

Please ignore this method if cache for current calculated property is not enabled.

返回:

The reference wrapper of parameterMap

• If the `Ref` wrapper itself is null, it means there is some filter but not cacheable filter
• If the `Ref` wrapper itself is not null, it means there is no filter(wrapped value is null) or there is a cacheable filter(wrapped value is not null)

currentConnection

@NotNull
static @NotNull Connection currentConnection()

Get the database connection should be used, it can be ignored if the current resolver is injected and the spring-transaction is enabled.

返回:

the database connection should be used, never return null.

抛出:

IllegalStateException - cannot retrieve the current connection.