GSON null value

[Alexandre Vieira]

Hello,

I'm using the library to make ReST calls and parse the JSON response into a Java object. The JSON string may contain null values.

Previously, I was using Spring Android to handle HTTP requests and GSON to parse the responses.

Using GSON only, a null JSON value would correspond to a Java null object. Currently, however, a null JSON value corresponds to a Java Object: 

JSON: {"something":null}

toString(): something=java.lang.Object@41f456301

I turned to this thread and followed Yaniv's advice:

private String something;

public String getSomething()

{

if(something == null) return null;

if(Data.isNull(something))

Log.d(TAG, "Data.isNull(something)");

else

Log.d(TAG, "NOT Data.isNull(something)");

return (Data.isNull(something) ? null : something);

}

The code above prints:

NOT Data.isNull(something)

something=java.lang.Object@41f456301

I would expect the variable 'something' to be equal to 'Data.NULL_STRING' but it isn't. Now, I could use the object representing a null Java value to compare against the variable when necessary, but I can't figure out which one it is.

Other JSON names which values are null also point to the exact same object (based on the address printed).

Long story short, how do I know if a value is actually null?