merge method for JsonObject

What about new method(s) merge for JsonObject... it would be something
simmilar to JsonArray.addAll

void    merge(JsonObject value) 
void    merge(Object value) 

Original issue reported on code.google.com by adamchuk on 20 Oct 2009 at 3:47

[anshunjain]

plus one to Sebas’ suggestion ! to do a deep copy is non-trivial and more scope for bugs. the strategies suggested could handle this, and one could always plug-in their own strategy

[GoogleCodeExporter]

Hello,

I know it's an old issue to discuss, but I still believe it could be a fine 
feature to have. 
I'm thinking something about this:

new 
GsonMerger().setConflictResolutionStrategy(myResolutionStrategy).merge(jsonObjec
t1, jsonObject2).build();

new 
GsonMerger().setConflictResolutionStrategy(myResolutionStrategy).merge(jsonObjec
t1).merge(jsonObject2).build();

where 

interface ConflictResolutionStrategy {
      void handleError(JsonElement parent, JsonElement oldElement, JsonElement newElement);
}

Following limpbizkit's comment, available options could be:

DefaultConflictResolutionStrategy - throws IllegalArgumentException if name 
conflict [DEFAULT]
AppendElementConflictResolutionStrategy - appends it to the same "bucket"
NonNullElementConflictResolutionStrategy - replaces the previous element only 
if null
NewerElementConflictResolutionStrategy - always replaces the previous element

Why do I refloat this? Because all the examples I saw they were with shallow 
json trees, just one depth-level. It comes a little bit more complex with 
greater json graphs. A single-line utility would be perfect.

Thanks,

Sebas.-

Original comment by [e-mail] on 11 Sep 2014 at 3:01