Method wrap

src/main/java/com/google/gson/Primitives.java:95–101

Returns the corresponding wrapper type of type if it is a primitive type; otherwise returns type itself. Idempotent. wrap(int.class) == Integer.class wrap(Integer.class) == Integer.class wrap(String.class) == String.class

(Class<T> type)

   * </pre>
   */
  public static <T> Class<T> wrap(Class<T> type) {
    // cast is safe: long.class and Long.class are both of type Class<Long>
    @SuppressWarnings("unchecked")
    Class<T> wrapped = (Class<T>) PRIMITIVE_TO_WRAPPER_TYPE.get(
        $Gson$Preconditions.checkNotNull(type));
    return (wrapped == null) ? type : wrapped;
  }

  /**
   * Returns the corresponding primitive type of {@code type} if it is a