code: public static void notPositive(Integer value) {
  		if(!validation) return;
  		notNull(value);
  		if(value > 0)
  			throw new ParameterException(ErrorCode.POSITIVE);
  	}
docs: Checks if the given integer is NOT positive.
  @param value The integer value to validate.
  @throws ParameterException if the given integer value is <code>null</code> or bigger than 0.