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Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 1 post ] 
Author Message
 Post subject: Incorrect reflection with AccessType("field") in a
PostPosted: Mon Sep 18, 2006 12:52 am 
Newbie

Joined: Tue Nov 02, 2004 2:37 am
Posts: 3
I have an entity using access type property. Within that entity, I have a List which I want to access with field access, but expose via a public getter returning an array instead of a list. I have added an @AccessType("field") annotation to the getter method. Hibernate annotations appear to be using the reflected type from the getter method, rather than the type of the field when building its meta-data.

Hibernate Version: hibernate-3.2.0CR1 and hibernate-annotations-3.2.0CR1

Mapping documents:

Code:
package com.sandstone_tech.framework.persistence.test;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Version;

@Entity
@Table(name="Pet")
public class Pet
{
    private Long id;

    private Long objectVersion;

    private PetOwner owner;

    private String name;
   
    @ManyToOne(cascade = CascadeType.PERSIST)
    public PetOwner getOwner()
    {
        return owner;
    }

    public void setOwner(PetOwner owner)
    {
        this.owner = owner;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    @Id @GeneratedValue
    public Long getId()
    {
        return id;
    }

    public void setId(Long l)
    {
        id = l;
    }

    @Version
    public Long getObjectVersion()
    {
        return objectVersion;
    }

    public void setObjectVersion(Long version2)
    {
        this.objectVersion = version2;
    }

}

package com.sandstone_tech.framework.persistence.test;

import java.util.ArrayList;
import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToMany;
import javax.persistence.Version;

import org.hibernate.annotations.AccessType;
import org.hibernate.annotations.IndexColumn;

/**
* Test class for testing persistence framework
*
* @author andrewduckworth
*
*/
@Entity
public class PetOwner
{
    private Long id;

    private Long objectVersion;

    private String name;

    private List<Pet> pets = new ArrayList<Pet>();
   
    @OneToMany(targetEntity=Pet.class, cascade=CascadeType.ALL)
    @IndexColumn(name="ownerOrder")
    @JoinColumn(name="ownerId")
    @AccessType("field")
    public Pet[] getPets()
    {
        return pets.toArray(new Pet[]{});
    }

    public void addPet(Pet pet)
    {
        pets.add(pet);
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }
   
    @Id @GeneratedValue
    public Long getId()
    {
        return id;
    }

    public void setId(Long l)
    {
        id = l;
    }

    @Version
    public Long getObjectVersion()
    {
        return objectVersion;
    }

    public void setObjectVersion(Long version2)
    {
        this.objectVersion = version2;
    }

}

Code between sessionFactory.openSession() and session.close():
AnnotationConfiguration config = new AnnotationConfiguration();
config.setProperties(getProperties());
config.addAnnotatedClass(PetOwner.class);
config.addAnnotatedClass(Pet.class);
SessionFactory f = config.buildSessionFactory();
Session s = f.openSession();

PetOwner owner = new PetOwner();
owner.setName("Fred");

Pet cat = new Pet();
cat.setName("keats");
cat.setOwner(owner);
owner.addPet(cat);

Pet dog = new Pet();
dog.setName("fido");
dog.setOwner(owner);
owner.addPet(dog);

s.persist(owner);
s.flush();
s.close();

Long id = owner.getId();
// Now try and reload it in a different session
// and check they have been persisted correctly
s = f.openSession();
Object o = s.get(PetOwner.class, id);

assertTrue(o instanceof PetOwner);
PetOwner p2 = (PetOwner) o;

assertTrue(p2.getPets().length == 2);
s.close();

Full stack trace of any exception that occurs:
Quote:
java.lang.ClassCastException: java.util.ArrayList
at org.hibernate.type.ArrayType.getElementsIterator(ArrayType.java:48)
at org.hibernate.type.CollectionType.getElementsIterator(CollectionType.java:188)
at org.hibernate.engine.CascadingAction.getAllElementsIterator(CascadingAction.java:266)
at org.hibernate.engine.CascadingAction.access$100(CascadingAction.java:21)
at org.hibernate.engine.CascadingAction$8.getCascadableChildrenIterator(CascadingAction.java:206)
at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:288)
at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:185)
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:160)
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:108)
at org.hibernate.engine.Cascade.cascade(Cascade.java:248)
at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:437)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:326)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:180)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:108)
at org.hibernate.event.def.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:131)
at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:87)
at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:38)
at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:620)
at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:594)
at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:598)
at com.sandstone_tech.framework.persistence.test.PersistenceTest.testFieldAccessMappingOnGetter(PersistenceTest.java:439)
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 junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)


Name and version of the database you are using:
SQLServer

The generated SQL (show_sql=true):

Debug level Hibernate log excerpt:


Problems with Session and transaction handling?

Read this: http://hibernate.org/42.html


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