org.dellroad.stuff.dao
Class AbstractDAO.DAOCriteriaUniqueCallback

java.lang.Object
  org.dellroad.stuff.dao.QueryCallback<R>
      org.dellroad.stuff.dao.TypedQueryCallback<T,R>
          org.dellroad.stuff.dao.CriteriaCallback<T,T>
              org.dellroad.stuff.dao.AbstractDAO.DAOCriteriaUniqueCallback

All Implemented Interfaces:

JpaCallback<T>

Enclosing class:

AbstractDAO<T>

protected abstract class AbstractDAO.DAOCriteriaUniqueCallback
extends CriteriaCallback<T,T>

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

Returns null if instance is not found.

Field Summary

Fields inherited from class org.dellroad.stuff.dao.CriteriaCallback

type

Constructor Summary

protected

AbstractDAO.DAOCriteriaUniqueCallback()

Method Summary

protected T

executeQuery(TypedQuery<T> query) Execute the query.

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

buildQuery, configureQuery

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

executeQuery

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

doInJpa

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractDAO.DAOCriteriaUniqueCallback

protected AbstractDAO.DAOCriteriaUniqueCallback()

Method Detail

executeQuery

protected final T executeQuery(TypedQuery<T> query)

Description copied from class: TypedQueryCallback

Execute the query.

Specified by:

executeQuery in class TypedQueryCallback<T,T>