com.germinus.merlin.dao
Class GenericDaoHibernate<T,PK extends java.io.Serializable>

java.lang.Object
  org.springframework.dao.support.DaoSupport
      org.springframework.orm.hibernate3.support.HibernateDaoSupport
          com.germinus.merlin.dao.GenericDaoHibernate<T,PK>

All Implemented Interfaces:

IGenericDao<T,PK>, org.springframework.beans.factory.InitializingBean

Direct Known Subclasses:

AssignmentDao, CourseDao, CourseDaoJpa

public abstract class GenericDaoHibernate<T,PK extends java.io.Serializable>
extends org.springframework.orm.hibernate3.support.HibernateDaoSupport
implements IGenericDao<T,PK>

This class serves as the Base class for all other DAOs - namely to hold common CRUD methods that they might all use. You should only need to extend this class when your require custom CRUD logic.

To register this class in your Spring context file, use the following XML.

      <bean id="fooDao" class="org.appfuse.dao.hibernate.GenericDaoHibernate">
          <constructor-arg value="org.appfuse.model.Foo"/>
          <property name="sessionFactory" ref="sessionFactory"/>
      </bean>
 

Author:

Bryan Noll

Field Summary

protected org.apache.commons.logging.Log

log

Fields inherited from class org.springframework.dao.support.DaoSupport

logger

Constructor Summary

GenericDaoHibernate(java.lang.Class<T> persistentClass)

Method Summary

boolean	exists(PK id) Checks for existence of an object of type T using the id arg.
T	get(PK id) Generic method to get an object based on class and identifier.
java.util.List<T>	getAll() Generic method used to get all objects of a particular type.
void	remove(PK id) Generic method to delete an object based on class and id
T	save(T object) Generic method to save an object - handles both update and insert.

Methods inherited from class org.springframework.orm.hibernate3.support.HibernateDaoSupport

checkDaoConfig, convertHibernateAccessException, createHibernateTemplate, getHibernateTemplate, getSession, getSession, getSessionFactory, releaseSession, setHibernateTemplate, setSessionFactory

Methods inherited from class org.springframework.dao.support.DaoSupport

afterPropertiesSet, initDao

Methods inherited from class java.lang.Object

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

Field Detail

log

protected final org.apache.commons.logging.Log log

Constructor Detail

GenericDaoHibernate

public GenericDaoHibernate(java.lang.Class<T> persistentClass)

Method Detail

getAll

public java.util.List<T> getAll()

Description copied from interface: IGenericDao

Generic method used to get all objects of a particular type. This is the same as lookup up all rows in a table.

Specified by:

getAll in interface IGenericDao<T,PK extends java.io.Serializable>

Returns:

List of populated objects

get

public T get(PK id)

Description copied from interface: IGenericDao

Generic method to get an object based on class and identifier. An ObjectRetrievalFailureException Runtime Exception is thrown if nothing is found.

Specified by:

get in interface IGenericDao<T,PK extends java.io.Serializable>

Parameters:

id - the identifier (primary assignmentId) of the object to get

Returns:

a populated object

See Also:

ObjectRetrievalFailureException

exists

public boolean exists(PK id)

Description copied from interface: IGenericDao

Checks for existence of an object of type T using the id arg.

Specified by:

exists in interface IGenericDao<T,PK extends java.io.Serializable>

Returns:

- true if it exists, false if it doesn't

save

public T save(T object)

Description copied from interface: IGenericDao

Generic method to save an object - handles both update and insert.

Specified by:

save in interface IGenericDao<T,PK extends java.io.Serializable>

Parameters:

object - the object to save

remove

public void remove(PK id)

Description copied from interface: IGenericDao

Generic method to delete an object based on class and id

Specified by:

remove in interface IGenericDao<T,PK extends java.io.Serializable>

Parameters:

id - the identifier (primary assignmentId) of the object to remove