Blob version1 to blob version 2

Question

HI,
I am serilizing a value object(v1) and storing it into a database as blob. Afterwards i am adding some more attributes to the value object and removing some attributes, let me call the new value object as v2. I am in a situation to convert the v1 blob to v2 blob (Say both has same serialization UID). i like to copy all common attributes of v1 and v2 from v1 to v2. Is there a easy way to do this instead of writing copy statements for each atributes?

Answer 1

Hi Fred_1king,
Here's a simple solution among others : build a class that will contain the common attributes of both v1 and v2 with getters/setters.
Example :
public class Common implements Serializable {
// common attributes
public class ObjectV1 implements Serializable {
// common attributes
    private Common common;
// specific attributes to v1
// constructor
    public class ObjectV1(Common common) {
        this.common = common;
public class ObjectV2 implements Serializable {
// common attributes
    private Common common;
// specific attributes to v2
    public class ObjectV2(Common common) {
        this.common = common;
}