/**
* Creates a DecimalValue from a given string.
*
* The decimal notation for the value is based on ISO 31-0, with some modifications:
* - the decimal separator is '.' (period). Comma is not used anywhere.
* - leading and trailing as well as any internal whitespace is ignored
* - the following characters are ignored: comma (","), apostrophe ("'").
* - scientific (exponential) notation is supported using the pattern /e[-+]\d+/
* - the number may start (or end) with a decimal point.
* - leading zeroes are stripped, except directly before the decimal point
* - trailing zeroes are stripped, except directly after the decimal point
* - zero is always positive.
*
* @see StringValueParser::stringParse
*
* @since 0.1
*
* @param string $value
*
* @return DecimalValue
* @throws ParseException
*/
protected function stringParse($value)
{
$rawValue = $value;
$value = $this->unlocalizer->unlocalizeNumber($value);
//handle scientific notation
list($value, $exponent) = $this->splitDecimalExponent($value);
$value = $this->normalizeDecimal($value);
if ($value === '') {
throw new ParseException('Decimal value must not be empty', $rawValue, self::FORMAT_NAME);
}
try {
$decimal = new DecimalValue($value);
$decimal = $this->applyDecimalExponent($decimal, $exponent);
return $decimal;
} catch (IllegalValueException $ex) {
throw new ParseException($ex->getMessage(), $rawValue, self::FORMAT_NAME);
}
}
