Jochen Kemnade created GROOVY-7669:
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Summary: Add a method to parse a locale-specific string into a
number
Key: GROOVY-7669
URL: https://issues.apache.org/jira/browse/GROOVY-7669
Project: Groovy
Issue Type: Improvement
Affects Versions: 2.4.5
Reporter: Jochen Kemnade
Proposed implementation from my custom category:
{code}
public static BigDecimal toBigDecimal(final CharSequence self, final Locale
locale) {
String s = self.toString().trim();
DecimalFormat numberFormat = (DecimalFormat)
NumberFormat.getInstance(locale);
char groupingSeparator =
numberFormat.getDecimalFormatSymbols().getGroupingSeparator();
char decimalSeparator =
numberFormat.getDecimalFormatSymbols().getDecimalSeparator();
StringBuilder sb = new StringBuilder(s);
for (int i = sb.length() - 1; i >= 0; i--) {
char c = sb.charAt(i);
if (c == groupingSeparator) {
sb.replace(i, i + 1, "");
} else if (c == decimalSeparator) {
sb.replace(i, i + 1, ".");
}
}
s = new String(sb);
return new BigDecimal(s);
}
{code}
tests:
{code}
def "Parse numbers in different Locales"(){
expect:
toBigDecimal("123", Locale.US).toPlainString() == "123"
toBigDecimal("123.45", Locale.US).toPlainString() == "123.45"
toBigDecimal("1,123.45", Locale.US).toPlainString() == "1123.45"
toBigDecimal("1,123", Locale.GERMANY).toPlainString() == "1.123"
toBigDecimal("1.123,45", Locale.GERMANY).toPlainString() == "1123.45"
}
{code}
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