[Java] Deserializing one pojo into another type

[chaokunyang]

Feature Request

Continuing the discussion in #1972 (comment), we need to support deserializing one pojo into another type without the need to register class

Is your feature request related to a problem? Please describe

#1972

Describe the solution you'd like

Step1 Extend ClassDef to replace type

  /**
   * Return a new {@link ClassDef} by replacing {@code definedClass} of all fields and current {@link ClassSpec} in hierarchy 
   * from {@code cls} into {@code targetCls}.
   */
  public ClassDef replace(Class<?> cls, Class<?> targetCls) {

  }

Step2

• Extend ClassResolver with a new readClassInfoWithMetaShare method with passed deserialized type
• The readClassInfoWithMetaShare should return the original ClassDef first, then invoke ClassDef#replace to return a new ClassDef
• Use that new ClassDef to create a new Deserializer to deserialize the data into passed deserialized type

Describe alternatives you've considered

No response

Additional context

#1996

[chaokunyang]

cc @orisgarno

[orisgarno]

will start this in few days

[orisgarno]

@chaokunyang im currenty working on it.
but do you have any idea why we need the original class(cls) public ClassDef replace(Class<?> cls, Class<?> targetCls)?
we can get from the classid from metashare? or do i miss something here?

[chaokunyang]

We don't need the original class, we could add a method like replaceRootClassTo(Class <?> cls)