Question

Here is the code I tried:

 if(rs.next()){
    Gson gson = new Gson();
    STRUCT st =  (STRUCT) rs.getObject(1);
    JGeometry j_geom = JGeometry.load(st);
    System.out.println(" gson.toJson(j_geom)  "+gson.toJson(j_geom));
 }

But I am getting this error:

java.lang.IllegalArgumentException: NaN is not a valid double value as per JSON specification. To override this behavior, use GsonBuilder.serializeSpecialDoubleValues() method.

Cannot find a way to sort it out.

Answer 1

Did you try using GsonBuilder.serializeSpecialFloatingPointValues()? The exception mentions serializeSpecialDoubleValues(), which does not seem to exist.

That JavaDoc states:

Section 2.4 of JSON specification disallows special double values (NaN, Infinity, -Infinity). However, Javascript specification (see section 4.3.20, 4.3.22, 4.3.23) allows these values as valid Javascript values. Moreover, most JavaScript engines will accept these special values in JSON without problem. So, at a practical level, it makes sense to accept these values as valid JSON even though JSON specification disallows them.