@Test
public void testMultiParsers() {
DateTimeFormatterBuilder builder = new DateTimeFormatterBuilder();
DateTimeParser[] parsers = new DateTimeParser[3];
parsers[0] = DateTimeFormat.forPattern("MM/dd/yyyy").withZone(DateTimeZone.UTC).getParser();
parsers[1] = DateTimeFormat.forPattern("MM-dd-yyyy").withZone(DateTimeZone.UTC).getParser();
parsers[2] =
DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss").withZone(DateTimeZone.UTC).getParser();
builder.append(
DateTimeFormat.forPattern("MM/dd/yyyy").withZone(DateTimeZone.UTC).getPrinter(), parsers);
DateTimeFormatter formatter = builder.toFormatter();
formatter.parseMillis("2009-11-15 14:12:12");
}
/**
* Select a format from a custom pattern.
*
* @param pattern pattern specification
* @throws IllegalArgumentException if the pattern is invalid
* @see #appendPatternTo
*/
private static DateTimeFormatter createFormatterForPattern(String pattern) {
if (pattern == null || pattern.length() == 0) {
throw new IllegalArgumentException("Invalid pattern specification");
}
DateTimeFormatter formatter = null;
synchronized (cPatternedCache) {
formatter = cPatternedCache.get(pattern);
if (formatter == null) {
DateTimeFormatterBuilder builder = new DateTimeFormatterBuilder();
parsePatternTo(builder, pattern);
formatter = builder.toFormatter();
cPatternedCache.put(pattern, formatter);
}
}
return formatter;
}
/**
* Parses the given pattern and appends the rules to the given DateTimeFormatterBuilder.
*
* @param pattern pattern specification
* @throws IllegalArgumentException if the pattern is invalid
* @see #forPattern
*/
private static void parsePatternTo(DateTimeFormatterBuilder builder, String pattern) {
int length = pattern.length();
int[] indexRef = new int[1];
for (int i = 0; i < length; i++) {
indexRef[0] = i;
String token = parseToken(pattern, indexRef);
i = indexRef[0];
int tokenLen = token.length();
if (tokenLen == 0) {
break;
}
char c = token.charAt(0);
switch (c) {
case 'G': // era designator (text)
builder.appendEraText();
break;
case 'C': // century of era (number)
builder.appendCenturyOfEra(tokenLen, tokenLen);
break;
case 'x': // weekyear (number)
case 'y': // year (number)
case 'Y': // year of era (number)
if (tokenLen == 2) {
boolean lenientParse = true;
// Peek ahead to next token.
if (i + 1 < length) {
indexRef[0]++;
if (isNumericToken(parseToken(pattern, indexRef))) {
// If next token is a number, cannot support
// lenient parse, because it will consume digits
// that it should not.
lenientParse = false;
}
indexRef[0]--;
}
// Use pivots which are compatible with SimpleDateFormat.
switch (c) {
case 'x':
builder.appendTwoDigitWeekyear(new DateTime().getWeekyear() - 30, lenientParse);
break;
case 'y':
case 'Y':
default:
builder.appendTwoDigitYear(new DateTime().getYear() - 30, lenientParse);
break;
}
} else {
// Try to support long year values.
int maxDigits = 9;
// Peek ahead to next token.
if (i + 1 < length) {
indexRef[0]++;
if (isNumericToken(parseToken(pattern, indexRef))) {
// If next token is a number, cannot support long years.
maxDigits = tokenLen;
}
indexRef[0]--;
}
switch (c) {
case 'x':
builder.appendWeekyear(tokenLen, maxDigits);
break;
case 'y':
builder.appendYear(tokenLen, maxDigits);
break;
case 'Y':
builder.appendYearOfEra(tokenLen, maxDigits);
break;
}
}
break;
case 'M': // month of year (text and number)
if (tokenLen >= 3) {
if (tokenLen >= 4) {
builder.appendMonthOfYearText();
} else {
builder.appendMonthOfYearShortText();
}
} else {
builder.appendMonthOfYear(tokenLen);
}
break;
case 'd': // day of month (number)
builder.appendDayOfMonth(tokenLen);
break;
case 'a': // am/pm marker (text)
builder.appendHalfdayOfDayText();
break;
case 'h': // clockhour of halfday (number, 1..12)
builder.appendClockhourOfHalfday(tokenLen);
break;
case 'H': // hour of day (number, 0..23)
builder.appendHourOfDay(tokenLen);
break;
case 'k': // clockhour of day (1..24)
builder.appendClockhourOfDay(tokenLen);
break;
case 'K': // hour of halfday (0..11)
builder.appendHourOfHalfday(tokenLen);
break;
case 'm': // minute of hour (number)
builder.appendMinuteOfHour(tokenLen);
break;
case 's': // second of minute (number)
builder.appendSecondOfMinute(tokenLen);
break;
case 'S': // fraction of second (number)
builder.appendFractionOfSecond(tokenLen, tokenLen);
break;
case 'e': // day of week (number)
builder.appendDayOfWeek(tokenLen);
break;
case 'E': // dayOfWeek (text)
if (tokenLen >= 4) {
builder.appendDayOfWeekText();
} else {
builder.appendDayOfWeekShortText();
}
break;
case 'D': // day of year (number)
builder.appendDayOfYear(tokenLen);
break;
case 'w': // week of weekyear (number)
builder.appendWeekOfWeekyear(tokenLen);
break;
case 'z': // time zone (text)
if (tokenLen >= 4) {
builder.appendTimeZoneName();
} else {
builder.appendTimeZoneShortName();
}
break;
case 'Z': // time zone offset
if (tokenLen == 1) {
builder.appendTimeZoneOffset(null, "Z", false, 2, 2);
} else if (tokenLen == 2) {
builder.appendTimeZoneOffset(null, "Z", true, 2, 2);
} else {
builder.appendTimeZoneId();
}
break;
case '\'': // literal text
String sub = token.substring(1);
if (sub.length() == 1) {
builder.appendLiteral(sub.charAt(0));
} else {
// Create copy of sub since otherwise the temporary quoted
// string would still be referenced internally.
builder.appendLiteral(new String(sub));
}
break;
default:
throw new IllegalArgumentException("Illegal pattern component: " + token);
}
}
}