Loading class from relaional storage

[ivang]

Hi,

I have a this problem - a class is serialized and saved in a database a while ago. It is saved as byte[]. Now, this same class in the code branch has a different serialUID than the one serialized before. Also two more fields and methods were added to the new class. Can I use javaassist somehow to inject the changes into the obsolete class. Indeed, when I deploy my ear and try to read the class, the ObjectIntputStream throws Exception as the UID of the class in ear is differen from the one trying to deserialized.

[chiba]

I don't think you can read an old serialized data in any way
if you add a new field to that class. What do you
mean by "inject the changes into the obsolete class"?
Do you want to convert a serialized data in the database
to be compatible with a new version of the class?

[ivang]

Yes, i was hoping to get the byte[], change the SerialUID value, add the new fields and methods, serialize back update the row in the database. Perhaps javaassist is not the way to go here ?

[chiba]

Unfortunately, Javassist is not a toolkit for editing
serialized data. It might be a good idea that Javassist
supports that editing but currently Javassist does not.
Sorry.