/**
* Append a representation of the time zone of 'calendar' to 'buffer'.
*
* @param count the number of z or Z characters in the format string; "zzz" would be 3, for
* example.
* @param generalTimeZone true if we should use a display name ("PDT") if available; false implies
* that we should use RFC 822 format ("-0800") instead. This corresponds to 'z' versus 'Z' in
* the format string.
*/
private void appendTimeZone(StringBuffer buffer, int count, boolean generalTimeZone) {
if (generalTimeZone) {
TimeZone tz = calendar.getTimeZone();
boolean daylight = (calendar.get(Calendar.DST_OFFSET) != 0);
int style = count < 4 ? TimeZone.SHORT : TimeZone.LONG;
if (!formatData.customZoneStrings) {
buffer.append(tz.getDisplayName(daylight, style, formatData.locale));
return;
}
// We can't call TimeZone.getDisplayName() because it would not use
// the custom DateFormatSymbols of this SimpleDateFormat.
String custom =
TimeZoneNames.getDisplayName(formatData.zoneStrings, tz.getID(), daylight, style);
if (custom != null) {
buffer.append(custom);
return;
}
}
// We didn't find what we were looking for, so default to a numeric time zone.
appendNumericTimeZone(buffer, count, generalTimeZone);
}
private void append(
StringBuffer buffer,
FieldPosition position,
List<FieldPosition> fields,
char format,
int count) {
int field = -1;
int index = PATTERN_CHARS.indexOf(format);
if (index == -1) {
throw new IllegalArgumentException("Unknown pattern character '" + format + "'");
}
int beginPosition = buffer.length();
Field dateFormatField = null;
switch (index) {
case ERA_FIELD:
dateFormatField = Field.ERA;
buffer.append(formatData.eras[calendar.get(Calendar.ERA)]);
break;
case YEAR_FIELD:
dateFormatField = Field.YEAR;
int year = calendar.get(Calendar.YEAR);
/*
* For 'y' and 'yyy', we're consistent with Unicode and previous releases
* of Android. But this means we're inconsistent with the RI.
* http://unicode.org/reports/tr35/
*/
if (count == 2) {
appendNumber(buffer, 2, year % 100);
} else {
appendNumber(buffer, count, year);
}
break;
case STAND_ALONE_MONTH_FIELD: // 'L'
dateFormatField = Field.MONTH;
appendMonth(buffer, count, true);
break;
case MONTH_FIELD: // 'M'
dateFormatField = Field.MONTH;
appendMonth(buffer, count, false);
break;
case DATE_FIELD:
dateFormatField = Field.DAY_OF_MONTH;
field = Calendar.DATE;
break;
case HOUR_OF_DAY1_FIELD: // 'k'
dateFormatField = Field.HOUR_OF_DAY1;
int hour = calendar.get(Calendar.HOUR_OF_DAY);
appendNumber(buffer, count, hour == 0 ? 24 : hour);
break;
case HOUR_OF_DAY0_FIELD: // 'H'
dateFormatField = Field.HOUR_OF_DAY0;
field = Calendar.HOUR_OF_DAY;
break;
case MINUTE_FIELD:
dateFormatField = Field.MINUTE;
field = Calendar.MINUTE;
break;
case SECOND_FIELD:
dateFormatField = Field.SECOND;
field = Calendar.SECOND;
break;
case MILLISECOND_FIELD:
dateFormatField = Field.MILLISECOND;
int value = calendar.get(Calendar.MILLISECOND);
appendNumber(buffer, count, value);
break;
case STAND_ALONE_DAY_OF_WEEK_FIELD:
dateFormatField = Field.DAY_OF_WEEK;
appendDayOfWeek(buffer, count, true);
break;
case DAY_OF_WEEK_FIELD:
dateFormatField = Field.DAY_OF_WEEK;
appendDayOfWeek(buffer, count, false);
break;
case DAY_OF_YEAR_FIELD:
dateFormatField = Field.DAY_OF_YEAR;
field = Calendar.DAY_OF_YEAR;
break;
case DAY_OF_WEEK_IN_MONTH_FIELD:
dateFormatField = Field.DAY_OF_WEEK_IN_MONTH;
field = Calendar.DAY_OF_WEEK_IN_MONTH;
break;
case WEEK_OF_YEAR_FIELD:
dateFormatField = Field.WEEK_OF_YEAR;
field = Calendar.WEEK_OF_YEAR;
break;
case WEEK_OF_MONTH_FIELD:
dateFormatField = Field.WEEK_OF_MONTH;
field = Calendar.WEEK_OF_MONTH;
break;
case AM_PM_FIELD:
dateFormatField = Field.AM_PM;
buffer.append(formatData.ampms[calendar.get(Calendar.AM_PM)]);
break;
case HOUR1_FIELD: // 'h'
dateFormatField = Field.HOUR1;
hour = calendar.get(Calendar.HOUR);
appendNumber(buffer, count, hour == 0 ? 12 : hour);
break;
case HOUR0_FIELD: // 'K'
dateFormatField = Field.HOUR0;
field = Calendar.HOUR;
break;
case TIMEZONE_FIELD: // 'z'
dateFormatField = Field.TIME_ZONE;
appendTimeZone(buffer, count, true);
break;
case RFC_822_TIMEZONE_FIELD: // 'Z'
dateFormatField = Field.TIME_ZONE;
appendNumericTimeZone(buffer, count, false);
break;
}
if (field != -1) {
appendNumber(buffer, count, calendar.get(field));
}
if (fields != null) {
position = new FieldPosition(dateFormatField);
position.setBeginIndex(beginPosition);
position.setEndIndex(buffer.length());
fields.add(position);
} else {
// Set to the first occurrence
if ((position.getFieldAttribute() == dateFormatField
|| (position.getFieldAttribute() == null && position.getField() == index))
&& position.getEndIndex() == 0) {
position.setBeginIndex(beginPosition);
position.setEndIndex(buffer.length());
}
}
}