java - @jsonproperty serialize different pojo elements in the same attribute name -

i have simple pojo

public class c {    public string f1;    public integer f2; } 

at runtime sure @ 1 of fields not null (i.e. if f1 "hello", i'm sure f2 null, , vice versa)

i serialize object using same name; example, with

c c1 = new c(); c1.f1 = "hello" c c2 = new c(); c2.f2 = integer.valueof(99) 

i have c1 serialized {"samekey":"hello"} , c2 {"samekey":99}.

i know can use @jsonproperty set serialized name, cannot set same name both fields.

is there way that?

here customserializer, checks if f2 value not null f2 value copied f1 , making f2=null.and excluding nulls in model 1 key&value other 1 null.

public class customserializer extends jsonserializer<c> {  @override public void serialize(final c c, final jsongenerator gen, final serializerprovider serializers) throws ioexception, jsonprocessingexception {     if(c.getf2() != null)  // considering need f1 key && value     {         c.setf1(c.getf2().tostring());         c.setf2(null);     } } 

}

annotate serializer & notnull in model as

@jsonserialize(using = customserializer.class) @jsoninclude(jsoninclude.include.non_null) public class c {    private string f1;    private integer f2;     //getters & setters } 

hope expecting.