RE: [Hibernate] custom identifier class

[<phr...@im...>]

hi,

excuse my arrogance for re-posting this, but i haven't found a solution
for the problem described below:

On Tue, 10 Dec 2002 12:34:56 -0500, phr...@im... said:
> hi,
> 
> On Tue, 10 Dec 2002 10:34:30 +1100, "Gavin King" <Gav...@ex...>
> said:
> > Oh, so it isn't actually a composite key. I didn't understand
> > properly then. Well, using a UserType is exactly the right 
> > approach. You would also need to implement IdentifierGenerator
> > to generate instances of PrimaryKey (your implementation could 
> > just wrap up a built-in key generation strategy). This should
> > work out perfectly - if you have any more problems let me know.
> > 
> > The mapping would be:
> > 
> > <id name="key" type="my.pkg.PrimaryKeyType">
> >    <generator class="my.pkg.PrimaryKeyGenerator"/>
> > </id>
> 
> i created my own PK generator, but i'm still getting the same exception i
> had before:
> 
> cirrus.hibernate.PropertyAccessException: IllegalArgumentException
> occurred while calling setter of test.hibernate.Foo.pk
> at cirrus.hibernate.helpers.ReflectHelper.set(ReflectHelper.java:190)
> at
> cirrus.hibernate.persister.AbstractEntityPersister.setIdentifier(AbstractEntityPersister.java:281)
> at cirrus.hibernate.impl.SessionImpl.doSave(SessionImpl.java:528)
> at cirrus.hibernate.impl.SessionImpl.save(SessionImpl.java:483)
> at cirrus.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:919)
> at
> test.hibernate.ejb.HibTestSessionBean.saveFoo(HibTestSessionBean.java:53)
> 
> from Foo.hbm.xml:
> 
> <id type="test.hibernate.MyPrimaryKeyType" name="pk" column="id"
> length="16" unsaved-value="null">
>     <generator class="test.hibernate.MySequencePKGenerator">
> 	<param>MY_SEQ</param>
>     </generator>
> </id>
> 
> Foo.java has:
> 
>   public PrimaryKey getPk()
>   public void setPk(PrimaryKey pk)
>   (i tried adding setPk(Long), setPk(String), setPK(long) - that didnt
>   chg the exception at all)
> 
> 
> My pk generator extends SequenceGenerator, and overrides one method as
> follows:
> 
>   public Serializable generate(SessionImplementor session, Object obj)
>   throws SQLException, HibernateException {
> 	return new PrimaryKey( String.valueOf(super.generate(session, obj)) );
>   }
> 
> 
> the implementation of my UserType is as follows:
> 
>   private static final int[] TYPES = { Types.VARCHAR };
> 
>   public int[] sqlTypes() {
> 	return TYPES; 
>   }
> 
>   public Class returnedClass() {
> 	return PrimaryKey.class;
>   }
> 
>   public boolean equals(Object x, Object y) {
> 	if (x==y) return true;
> 	if (x==null || y==null) return false;
> 	return x.equals(y);
>   }
> 
>   public Object nullSafeGet(ResultSet rs, String[] names, Object owner)
>   throws HibernateException, SQLException {
> 	String id = (String) Hibernate.STRING.nullSafeGet(rs, names[0]);
> 	return id==null ? null : new PrimaryKey(id);
>   }
> 
>   public void nullSafeSet(PreparedStatement st, Object value, int index)
>   throws HibernateException, SQLException {
> 	String id = (value==null) ? null : ((PrimaryKey)value).getId();
> 	Hibernate.STRING.nullSafeSet(st, id, index);
>   }
> 
>   public Object deepCopy(Object o) {
> 	if (o==null) return null;
> 	return new PrimaryKey( (PrimaryKey)o );
>   }
> 
>   public boolean isMutable() {
> 	return false;
>   }
> 
> 
> any help would be appreciated :)
> 
>           viktor
> -- 
>   
>   phr...@im...
> 
> -- 
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  phr...@im...

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