[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-7234) No way to get Object's type in nullSafeGet

[Vagif Kuliyev (JIRA)]

    [ https://hibernate.onjira.com/browse/HHH-7234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=46211#comment-46211 ] 

Vagif Kuliyev commented on HHH-7234:
------------------------------------

My preferred SerA implementation is using ProtoStuff but Kryo also requires the class to deserialize. 

> No way to get Object's type in nullSafeGet
> ------------------------------------------
>
>                 Key: HHH-7234
>                 URL: https://hibernate.onjira.com/browse/HHH-7234
>             Project: Hibernate ORM
>          Issue Type: New Feature
>          Components: core
>    Affects Versions: 4.1.0
>            Reporter: Vagif Kuliyev
>
> I am trying to do the following: 
> public class SerUserType extends MutableUserType {
>     protected Class klass;
>     protected SerA ser=F.g(SerA.class);
>     public Class returnedClass() {
>         return klass;
>     }
>     public int[] sqlTypes() {
>         return new int[] {Types.BLOB};
>     }
>     public boolean equals(Object x, Object y) throws HibernateException {
>         return ObjectUtils.equals(x, y);
>     }
>     public Object deepCopy(Object value) {
>         klass=value.getClass();
>         Copyable copyable=(Copyable)value;
>         Object copy=copyable.copy();
>         return copy;
>     }
>     public Object nullSafeGet(ResultSet resultSet,String[] names,SessionImplementor session,Object owner) 
>         throws HibernateException,SQLException {
>         byte[] b=(byte[])BlobType.INSTANCE.nullSafeGet(resultSet,names,session,owner);
>         return ser.deser(b,klass);
>     }
>     public void nullSafeSet(PreparedStatement preparedStatement,Object value,int index,SessionImplementor session) 
>         throws HibernateException,SQLException {
>         BlobType.INSTANCE.nullSafeSet(preparedStatement,ser.ser(value),index,session);
>     }
> }
> However, this is not possible because it is not possible to access the object's class in the nullSafeGet method. I propse that the object's class is passed to the nullSafeGet in the UserType interface. 
> Regardless of whether is correct in functionality (I haven't tested), I think it would be highly beneficial to know the runtime class of the object in the nullSafeGet metod.

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