Abstract Generic Class for DAO with spring SessionFactory injection setup help needed.

[David Brave]

Hello,
I am new to spring, and need some help.
Before, I was using hibernate and a hibernateutil along with an abstract generic class for database access.

Here is my class I was using before

public abstract class AbstractHibernateRepository<T, Id extends Serializable>
{
    private Class<T> persistentClass;
    

    @SuppressWarnings("unchecked")
    public AbstractHibernateRepository()
    {
        this.persistentClass = (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
    }
    public Class<T> getPersistentClass()
    {
        return persistentClass;
    }
    public void flushSession()
    {
        getSession().flush();
    }
    public void clearSession()
    {
        getSession().clear();
    }
    @SuppressWarnings("unchecked")
    public T findById(Id id, boolean lock)
    {
        T entity;

        if (lock)
        {
            entity = (T) getSession().get(getPersistentClass(), id, LockMode.UPGRADE);
        }
        else
        {
            entity = (T) getSession().get(getPersistentClass(), id);
        }

        return entity;
    }
    @SuppressWarnings("unchecked")
	public List<T> findListByName(String tablecolumnname, String name)
    {
    	Criteria criteria = getSession().createCriteria(persistentClass);
        criteria.add(Restrictions.eq(tablecolumnname, name));
        
        List<T> objectList = criteria.list();
        return objectList;
    }
    public T findInstanceByName(String tablecolumnname, String name)
    {
    	Criteria criteria = getSession().createCriteria(persistentClass);
    	criteria.add(Restrictions.eq(tablecolumnname, name));
    	T object = (T) criteria.uniqueResult();
    	return object;
    }
    @SuppressWarnings("unchecked")
	public List<T> findListByNamedInteger(String tablecolumnname, Integer name)
    {
    	Criteria criteria = getSession().createCriteria(persistentClass);
        criteria.add(Restrictions.eq(tablecolumnname, new Integer(name)));
        List<T> objectList = criteria.list();
        return objectList;
    }
    public List<T> findListByNamedDouble(String tablecolumnname, Double name)
    {
    	Criteria criteria = getSession().createCriteria(persistentClass);
        criteria.add(Restrictions.eq(tablecolumnname, new Double(name)));
        List<T> objectList = criteria.list();
        return objectList;
    }
    public T findInstanceByNamedInteger(String tablecolumnname, Integer name)
    {
    	Criteria criteria = getSession().createCriteria(persistentClass);
        criteria.add(Restrictions.eq(tablecolumnname, new Integer(name)));
        T objectList = (T) criteria.uniqueResult();
        return objectList;
    }
    @SuppressWarnings("unchecked")
	public List<T> findByQuery(String query)
    {
    	List<T> listObjects = getSession().createQuery(query).list();
    	return listObjects;
    }
    @SuppressWarnings("unchecked")
    public List<T> findAll()
    {
        Criteria criteria = getSession().createCriteria(persistentClass);
        return criteria.list();
    }
    public T makePersistent(T entity)
    {
        getSession().saveOrUpdate(entity);
        return entity;
    }
    public void makeTransient(T entity)
    {
        getSession().delete(entity);
    }
    public void makeTransient(Id id)
    {
        Object entity = getSession().get(getPersistentClass(), id);
        getSession().delete(entity);
    }
    public void refresh(T entity)
    {
        getSession().refresh(entity);
    }
   public T delete(T entity)
   {
	   Transaction tx = getSession().beginTransaction();
	   getSession().delete(entity);
	   tx.commit();
	   return entity;
   }
    public T save(T entity)
    {
    	//Transaction tx=getSession().beginTransaction();
    	try
    	{
	   	 	getSession().save(entity);
	   	 	commitTransaction();
	   	 	
    	}
    	catch(HibernateException ex)
    	{
    		HibernateUtil.rollbackTransaction();
            throw new InfrastructureException(ex);
    	}
    	
    	
    	return entity;
    }
    public T update(T entity)
    {
    	// Transaction tx=getSession().beginTransaction();
    	 try
    	 {
    		 getSession().update(entity);
        	 //tx.commit();
    		 commitTransaction();
    	 }
    	 catch(HibernateException ex)
     	 {
     		 HibernateUtil.rollbackTransaction();
             throw new InfrastructureException(ex);
     	 }
    	 
    	 return entity;
    }
    public T merge(T entity)
    {
    	Transaction tx=getSession().beginTransaction();
    	try
    	{
    		getSession().merge(entity);
       	 	tx.commit();
    	}
    	catch(HibernateException ex)
    	{
    		HibernateUtil.rollbackTransaction();
            throw new InfrastructureException(ex);
    	}
   	 	
        return entity;
    }
    @SuppressWarnings("unchecked")
	
    protected Session getSession()
    {
        return HibernateUtil.getSession();//.getCurrentSession();
    }
    protected void closeSession()
    {
        HibernateUtil.closeSession();
       
    }
    protected void commitTransaction()
    {
    	HibernateUtil.commitTransaction();
    }
    public void initHibernate() throws ExceptionInInitializerError {
        HibernateUtil.Configure(true);
        HibernateUtil.beginTransaction();
    }
}

Since Im new to spring, I was going a different route at first.
I was just setting up hibernatetransactionmanager in spring to inject a hibernateFactory into my service class. From here i was just accessing the session and doing hql queries for each method as needed in the service class.
This works, but i like having all of my CRUD operations for each hibernate bean ready for me and all I have to do is extend the abstract class
and typecast my hibernate bean to allow myself to minimize code.



I like my last way of using an abstract generic classes, but when I tried this with Spring, I get a nullpointer exception for my sessionFactory that I'm trying to inject

here is the bean setup for spring

<bean id="repository" class="data.AbstractHibernateRepository" scope="prototype">
	<property name="sessionFactory" ref="sessionFactory" />
</bean> 

Im using the @Transactional transaction annotation at the top of the abstract generic AbstractHibernateRepository class.

Anyone have ideas on the proper way to setup my spring config file?

[Mark Spritzler]

Well, your last approach is the approach that I would recommend. The only thing I see is that your class="" attribute in your bean is pointing to an abstract class, an abstract class cannot be instantiated in Java. So your class="" has to point to an actual instantiable class.

Mark

[David Brave]

So I got some advice on how to do this here http://forum.springsource.org/showthread.php?p=350974#post350974

Here are my classes/interfaces

public interface IAbstractHibernateRepository<T extends Serializable, Id extends Serializable> 
{
	
	
	List<T> findListByName(String tablecolumn, String name);
	T findInstanceByName(String tablecolumn, String name);
	List<T> findListByNamedInteger(String tablecolumnname, Integer name);
	List<T> findListByNamedDouble(String tablecolumnname, Double name);
	T findInstanceByNamedInteger(String tablecolumnname, Integer name);
	List<T> findByQuery(String query);
	List<T> findAll();
	T makePersistent(T entity);
	void makeTransient(T entity);
	void refresh(T entity);
	T delete(T entity);
	T save(T entity);
	T update(T entity);
	T merge(T entity);
	
	
}

@Transactional
@Repository
public abstract class AbstractHibernateRepository<T extends Serializable, Id extends Serializable> implements IAbstractHibernateRepository<T, Id>
{
	
	
	@PersistenceContext
	SessionFactory sessionFactory;
	public void setSessionFactory(SessionFactory value) 
	{
		sessionFactory = value;
	}
	
	private Class<T> persistentClass;
	
	
	
	@SuppressWarnings("unchecked")
	public AbstractHibernateRepository()
	{
		 this.persistentClass = (Class<T>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
	}
	public Class<T> getPersistentClass()
    {
        return persistentClass;
    }
	 @SuppressWarnings("unchecked")
	    public T findById(Id id, boolean lock)
	    {
	        T entity;

	        if (lock)
	        {
	            entity = (T) getSession().get(getPersistentClass(), id, LockMode.UPGRADE);
	        }
	        else
	        {
	            entity = (T) getSession().get(getPersistentClass(), id);
	        }

	        return entity;
	    }
	    @SuppressWarnings("unchecked")
		public List<T> findListByName(String tablecolumnname, String name)
	    {
	    	Criteria criteria = getSession().createCriteria(persistentClass);
	        criteria.add(Restrictions.eq(tablecolumnname, name));
	        
	        List<T> objectList = criteria.list();
	        return objectList;
	    }
	    public T findInstanceByName(String tablecolumnname, String name)
	    {
	    	Criteria criteria = getSession().createCriteria(persistentClass);
	    	criteria.add(Restrictions.eq(tablecolumnname, name));
	    	T object = (T) criteria.uniqueResult();
	    	return object;
	    }
	    @SuppressWarnings("unchecked")
		public List<T> findListByNamedInteger(String tablecolumnname, Integer name)
	    {
	    	Criteria criteria = getSession().createCriteria(persistentClass);
	        criteria.add(Restrictions.eq(tablecolumnname, new Integer(name)));
	        List<T> objectList = criteria.list();
	        return objectList;
	    }
	    public List<T> findListByNamedDouble(String tablecolumnname, Double name)
	    {
	    	Criteria criteria = getSession().createCriteria(persistentClass);
	        criteria.add(Restrictions.eq(tablecolumnname, new Double(name)));
	        List<T> objectList = criteria.list();
	        return objectList;
	    }
	    public T findInstanceByNamedInteger(String tablecolumnname, Integer name)
	    {
	    	Criteria criteria = getSession().createCriteria(persistentClass);
	        criteria.add(Restrictions.eq(tablecolumnname, new Integer(name)));
	        T objectList = (T) criteria.uniqueResult();
	        return objectList;
	    }
	    @SuppressWarnings("unchecked")
		public List<T> findByQuery(String query)
	    {
	    	List<T> listObjects = getSession().createQuery(query).list();
	    	return listObjects;
	    }
	    @SuppressWarnings("unchecked")
	    public List<T> findAll()
	    {
	        Criteria criteria = getSession().createCriteria(persistentClass);
	        return criteria.list();
	    }
	    public T makePersistent(T entity)
	    {
	        getSession().saveOrUpdate(entity);
	        return entity;
	    }
	    public void makeTransient(T entity)
	    {
	        getSession().delete(entity);
	    }
	    public void refresh(T entity)
	    {
	        getSession().refresh(entity);
	    }
	    public T delete(T entity)
	   {
		   Transaction tx = getSession().beginTransaction();
		   getSession().delete(entity);
		   tx.commit();
		   return entity;
	   }
	    public T save(T entity)
	    {
	    	Transaction tx=getSession().beginTransaction();
	   	 	getSession().save(entity);
	   	 	tx.commit();
	    	return entity;
	    }
	    public T update(T entity)
	    {
	    	 Transaction tx=getSession().beginTransaction();
	    	 getSession().update(entity);
	    	 tx.commit();
	    	 return entity;
	    }
	    public T merge(T entity)
	    {
	    	Transaction tx=getSession().beginTransaction();
	   	 	getSession().merge(entity);
	   	 	tx.commit();
	        return entity;
	    }
	    public Session getSession()
	    {
	    	return sessionFactory.getCurrentSession();
	    }
}

public interface IEventsRepository extends IAbstractHibernateRepository<Event, Long> {

}

public class EventRepository extends AbstractHibernateRepository<Event, Long> implements IEventsRepository
{


}

Here is my spring applicationContext.xml setup

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">


<!-- The singleton hibernate session factory -->
<bean id="sessionFactory" scope="singleton" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="configLocation" value="classpath:hibernate.cfg.xml" />
</bean>
<!-- Spring's hibernate transaction manager -->

<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
	<property name="sessionFactory" ref="sessionFactory" />
</bean>

<!-- So classes/functions with @Transactional get a hibernate txn -->
<tx:annotation-driven />

<!-- Inject my business services class to the actions -->
<bean id="services" class="services.Services" scope="singleton">
	<property name="sessionFactory" ref="sessionFactory" />
	<property name="eventtRepository" ref="eventRepository" />

</bean> 

<bean id="eventRepository" class="data.test.EventRepository">

	<property name="sessionFactory" ref="sessionFactory" />
</bean>

</beans> 

Here is my service class.
Ive got a struts2 mvc setup and its accessing the getEvents( ) sevice method.

@Transactional
public class Services 
{

	
	@Autowired
	EventRepository eventtRepository;
	

	

	public void setEventtRepository(EventRepository eventtRepository) {
		this.eventtRepository = eventtRepository;
	}

	// So Spring can inject the session factory
	SessionFactory sessionFactory;
	public void setSessionFactory(SessionFactory value) 
	{
		sessionFactory = value;
	}// Shortcut for sessionFactory.getCurrentSession()
	
	public Session sess() 
	{
		return sessionFactory.getCurrentSession();
	}
	
	public Event getEventById(long id) 
	{
		return (Event) sess().load(Event.class, id);
	}
	
	public Person getPersonById(long id) 
	{
		return (Person) sess().load(Person.class, id);
	}
	
	public void deleteEventById(long id) 
	{
		sess().delete(getEventById(id));
	}
	
	public void deletePersonById(long id) 
	{
		sess().delete(getPersonById(id));
	}
	
	public void createEvent(String name) 
	{
	
		Event theEvent = new Event();
		theEvent.setName(name);
		sess().save(theEvent);
	}
	
	public void createPerson(String name) 
	{
	
		Person p = new Person();
		p.setName(name);
		sess().save(p);
	}
	
	@SuppressWarnings("unchecked")
	public List<Event> getEvents() 
	{
		
		 //Criteria criteria = sess().createCriteria(Event.class);
	   //  return criteria.list();
		//ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
		//IEventsRepository eventRepository = (IEventsRepository)ctx.getBean("eventRepository");
		return eventtRepository.findAll();
		
	}
	
	@SuppressWarnings("unchecked")
	public List<Person> getPeople() 
	{
		return sess().createQuery("from Person").list();
	}
	
	public void removePersonFromEvent(int personId, int eventId) 
	{
		getEventById(eventId).getPeople().remove(getPersonById(personId));
	}
	
	public void addPersonToEvent(int personId, int eventId) 
	{
		getEventById(eventId).getPeople().add(getPersonById(personId));
	}
} 

I also have sessionFactory being injected into my service class. originally this was how i was originally populating the data.
Now when I run the program and eventtRepository is injected into my Services class, I get this error.

2998 [main] ERROR org.springframework.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'services' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type '$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised' to required type 'data.EventRepository' for property 'eventtRepository'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [data.EventRepository] for property 'eventtRepository': no matching editors or conversion strategy found
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type '$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised' to required type 'data.EventRepository' for property 'eventtRepository'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [data.EventRepository] for property 'eventtRepository': no matching editors or conversion strategy found
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:462)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:499)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:493)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1371)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1330)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
... 26 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [data.EventRepository] for property 'eventtRepository': no matching editors or conversion strategy found
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:231)
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:447)
... 32 more
Mar 15, 2011 9:11:17 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'services' defined in ServletContext resource [/WEB-INF/applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type '$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised' to required type 'data.EventRepository' for property 'eventtRepository'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [data.EventRepository] for property 'eventtRepository': no matching editors or conversion strategy found
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:527)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:580)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type '$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised' to required type 'data.EventRepository' for property 'eventtRepository'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [data.EventRepository] for property 'eventtRepository': no matching editors or conversion strategy found
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:462)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:499)
at org.springframework.beans.BeanWrapperImpl.convertForProperty(BeanWrapperImpl.java:493)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.convertForProperty(AbstractAutowireCapableBeanFactory.java:1371)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1330)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
... 26 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [$Proxy15 implementing data.test.IEventsRepository,data.test.IAbstractHibernateRepository,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised] to required type [data.EventRepository] for property 'eventtRepository': no matching editors or conversion strategy found
at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:231)
at org.springframework.beans.BeanWrapperImpl.convertIfNecessary(BeanWrapperImpl.java:447)
... 32 more

_______________________________________________________________________________________

Ive tried using a Main class with a main method such as:

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
		IEventsRepository eventsDAO = (IEventsRepository)ctx.getBean("eventRepository");
		List<Event> events = (List<Event>) eventsDAO.findAll();
		for(Event e: events)
		System.out.println(e.getName());
	}

}

My EventRepository is fetched and it prints out the events in the mysql database.

If I use ClassPathXmlApplicationContext in my service class's getEvents( ) method directly, then I dont get the same error as
I mentioned above, and my service class works fine.
Any idea on what I need to do to allow myself to directly inject my EventRepository directly into my service class without using
the ClassPathXmlApplicationContext.
Anyone know what I'm doing wrong?

thanks.

[David Brave]

I was making a newbie to Spring mistake.
I was trying to inject the EventRepository into the property of Services EventRepository.
I changed this to the interface that EventRepository uses and changed the setter in Services and it worked.

@Transactional
public class Services 
{

	
	//@Autowired
	//EventRepository eventtRepository;
	IEventsRepository eventtRepository;

	

	//public void setEventtRepository(EventRepository eventtRepository) {
	//	this.eventtRepository = eventtRepository;
	//}

	public void setEventtRepository(IEventsRepository eventtRepository) {
		this.eventtRepository = eventtRepository;
	}

	// So Spring can inject the session factory
	SessionFactory sessionFactory;
	public void setSessionFactory(SessionFactory value) 
	{
		sessionFactory = value;
	}// Shortcut for sessionFactory.getCurrentSession()
	
	public Session sess() 
	{
		return sessionFactory.getCurrentSession();
	}
	
	public Event getEventById(long id) 
	{
		return (Event) sess().load(Event.class, id);
	}
	
	public Person getPersonById(long id) 
	{
		return (Person) sess().load(Person.class, id);
	}
	
	public void deleteEventById(long id) 
	{
		sess().delete(getEventById(id));
	}
	
	public void deletePersonById(long id) 
	{
		sess().delete(getPersonById(id));
	}
	
	public void createEvent(String name) 
	{
	
		Event theEvent = new Event();
		theEvent.setName(name);
		sess().save(theEvent);
	}
	
	public void createPerson(String name) 
	{
	
		Person p = new Person();
		p.setName(name);
		sess().save(p);
	}
	
	@SuppressWarnings("unchecked")
	public List<Event> getEvents() 
	{
		
		 //Criteria criteria = sess().createCriteria(Event.class);
	   //  return criteria.list();
		//ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
		//IEventsRepository eventRepository = (IEventsRepository)ctx.getBean("eventRepository");
		List<Event> currentEventList = eventtRepository.findAll();
		return currentEventList;
		
	}
	
	@SuppressWarnings("unchecked")
	public List<Person> getPeople() 
	{
		return sess().createQuery("from Person").list();
	}
	
	public void removePersonFromEvent(int personId, int eventId) 
	{
		getEventById(eventId).getPeople().remove(getPersonById(personId));
	}
	
	public void addPersonToEvent(int personId, int eventId) 
	{
		getEventById(eventId).getPeople().add(getPersonById(personId));
	}
} 

[Mark Spritzler]

Cool.

Mark