$Proxy25 cannot be cast to my class spring framework

Question

I am getting this exception while running a Test (I am trying to configure aop in spring):

java.lang.ClassCastException: $Proxy25 cannot be cast to path.UserDao
    at com.playence.app.daoTests.TestCreateOntologyDB.testGenerateGlobalAnnotation(TestCreateOntologyDB.java:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59)
    at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98)
    at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79)
    at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87)
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77)
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42)
    at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88)
    at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
    at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)
    at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)   

UserDao.java

public class UserDao extends AbstractHibernateDAOSupport {

    public UserDao() {
        super();
    }

    /**
     * Insert a new User into the database.
     * 
     * @param user
     */
    public void store(User user) throws DataAccessLayerException {
        super.save(user);
    }

    /**
     * Delete a User from the database.
     * 
     * @param user
     */
    public void delete(User user) throws DataAccessLayerException {
        super.delete(user);
    }

    /**
     * Updates the state of a detached User.
     * 
     * @param user
     */
    public void update(User user) throws DataAccessLayerException {
        super.update(user);
    }

    public User findByID(String id) throws DataAccessLayerException {
        return (User) this.find(User.class, id);

    }

    /**
     * Finds all Users in the database.
     * 
     * @return
     */
    public List findAll() throws DataAccessLayerException {
        return super.findAll(User.class);
    }

Spring configuration files: applicationContext-dao.xml

<bean id="userDao" class="path.UserDao">
        <property name="sessionFactory">
            <ref bean="sessionFactory" />
        </property>
    </bean>

TestCreateOntologyDB.java

....  
ApplicationContext ctx ;

    public TestCreateOntologyDB() {
        ctx = new ClassPathXmlApplicationContext("/applicationContext.xml");
    }

    @Test
    public void testGenerateGlobalAnnotation(){
        UserDao userDao = (UserDao)ctx.getBean("userDao");

...

And I haven't set up any UserDao additional propperty in any other configuration file. What could be the error?? Any help would be appreciated. Thanks in advance

Answer 1

Finally I found the sollution:

1. Create interface for the classes which will use aop

2. Edit the path to the correct one in spring configuration file:

3. Add this line in the same configuration file. Be aware that in my case it will influence in all the beans, but it can be included for just one bean.

The whole topic is here http://forum.springsource.org/showthread.php?p=357883