org.dellroad.stuff.spring

Class AbstractDAO.DAOQueryUniqueCallback

java.lang.Object

org.dellroad.stuff.dao.QueryCallback<R>

org.dellroad.stuff.dao.TypedQueryCallback<T,T>

org.dellroad.stuff.spring.AbstractDAO.DAOQueryUniqueCallback

Enclosing class:

AbstractDAO<T>

protected abstract class AbstractDAO.DAOQueryUniqueCallback
extends TypedQueryCallback<T,T>

Convenience subclass of QueryCallback for use by DAO subclasses when returning a single persistent instance.

Returns null if instance is not found.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DAOQueryUniqueCallback()

Method Summary

Modifier and Type	Method and Description
protected T	executeQuery(TypedQuery<T> query)

Methods inherited from class org.dellroad.stuff.dao.TypedQueryCallback

buildQuery, executeQuery

Methods inherited from class org.dellroad.stuff.dao.QueryCallback

query

Methods inherited from class java.lang.Object

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

Constructor Detail

DAOQueryUniqueCallback

protected DAOQueryUniqueCallback()

Method Detail

executeQuery

protected final T executeQuery(TypedQuery<T> query)

Specified by:

executeQuery in class TypedQueryCallback<T,T>