程序包 org.hibernate.loader.plan.exec.internal

类 RootHelper

java.lang.Object

org.hibernate.loader.plan.exec.internal.RootHelper

public class RootHelper
extends Object

作者:

Steve Ebersole

字段概要

字段

修饰符和类型	字段	说明
static RootHelper	INSTANCE	Singleton access

方法概要

修饰符和类型	方法	说明
<T extends QuerySpace> T	extractRootQuerySpace(QuerySpaces querySpaces, Class<EntityQuerySpace> returnType)	Extract the root QuerySpace of the LoadPlan, assuming there is just one.
<T extends Return> T	extractRootReturn(LoadPlan loadPlan, Class<T> returnType)	Extract the root return of the LoadPlan, assuming there is just one.

从类继承的方法 java.lang.Object

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

字段详细资料

INSTANCE

public static final RootHelper INSTANCE

Singleton access

方法详细资料

extractRootReturn

public <T extends Return> T extractRootReturn(LoadPlan loadPlan,
                                              Class<T> returnType)

Extract the root return of the LoadPlan, assuming there is just one.

类型参数:

T - The parameterized type of the specific Return type expected

参数:

loadPlan - The LoadPlan from which to extract the root return

returnType - The Return type expected, passed as an argument

返回:

The root Return

抛出:

IllegalStateException - If there is no root, more than one root or the single root is not of the expected type.

extractRootQuerySpace

public <T extends QuerySpace> T extractRootQuerySpace(QuerySpaces querySpaces,
                                                      Class<EntityQuerySpace> returnType)

Extract the root QuerySpace of the LoadPlan, assuming there is just one.

参数:

querySpaces - The QuerySpaces from which to extract the root.

returnType - The QuerySpace type expected, passed as an argument

返回:

The root QuerySpace

抛出:

IllegalStateException - If there is no root, more than one root or the single root is not of the expected type.