code: public static Double validateDouble(final String context,
  			final String input, final double minValue, final double maxValue,
  			final boolean allowNull) throws ValidationException {
  		return validator.getValidDouble(context, input, minValue, maxValue,
  				allowNull);
  	}
docs: Double Validation
  
  @param context
  @param input
  @param minValue
  @param maxValue
  @param allowNull
  @return