Customizing GSON for less science-y Double value handling

Generic.java

...
  /**
   * @return String -ified (JSON) version of Object ob, via GSON
   */
  public static getSomeJsonStr(Object ob){
    ...
    Gson g = new Gson();
    return g.toString(ob);
  }
...

New.java

...
  /**
   * @return String -ified (JSON) version of Object ob, via custom GSON instance
   */
  public static getSomeJsonStr(Object ob){
    ...
    Gson g = Utils.getCustomGsonInstance();
    return g.toString(ob);
  }
...

Utils.java

...
/**
 * Makes use of a custom type adapter to convert Double values without
 * using scientific notation.
 * 
 * @return Gson instance with custom handling of Double values
 */
public static String getCustomGsonInstance() {
    GsonBuilder gb = new GsonBuilder();
    gb.registerTypeAdapter(Double.class,  new JsonSerializer<Double>() {
      public JsonElement serialize(final Double src, final Type typeOfSrc, final JsonSerializationContext context) {
        BigDecimal value = BigDecimal.valueOf(src);

        return new JsonPrimitive(value);
      }
    });
    Gson g = gb.create();
    return g;
}
...