/**
* Decode file charset.
*
* @param f File to process.
* @return File charset.
* @throws IOException in case of error.
*/
public static Charset decode(File f) throws IOException {
SortedMap<String, Charset> charsets = Charset.availableCharsets();
String[] firstCharsets = {
Charset.defaultCharset().name(), "US-ASCII", "UTF-8", "UTF-16BE", "UTF-16LE"
};
Collection<Charset> orderedCharsets = U.newLinkedHashSet(charsets.size());
for (String c : firstCharsets)
if (charsets.containsKey(c)) orderedCharsets.add(charsets.get(c));
orderedCharsets.addAll(charsets.values());
try (RandomAccessFile raf = new RandomAccessFile(f, "r")) {
FileChannel ch = raf.getChannel();
ByteBuffer buf = ByteBuffer.allocate(4096);
ch.read(buf);
buf.flip();
for (Charset charset : orderedCharsets) {
CharsetDecoder decoder = charset.newDecoder();
decoder.reset();
try {
decoder.decode(buf);
return charset;
} catch (CharacterCodingException ignored) {
}
}
}
return Charset.defaultCharset();
}
/**
* Parses the binary data that describes the recurrent pattern.
*
* @param data the binary data.
* @param sourceTask the calendar item.
*/
public RecurringPattern(byte[] data, CalendarItemTimerTask sourceTask) {
this.sourceTask = sourceTask;
dataBuffer = ByteBuffer.wrap(data).order(ByteOrder.LITTLE_ENDIAN);
int offset = 4;
recurFrequency = dataBuffer.getShort(offset);
offset += 2;
patternType = PatternType.getFromShort(dataBuffer.getShort(offset));
offset += 2;
calendarType = dataBuffer.getShort(offset);
offset += 2;
firstDateTime = dataBuffer.getInt(offset);
offset += 4;
period = dataBuffer.getInt(offset);
offset += 4;
slidingFlag = dataBuffer.getInt(offset);
offset += 4;
switch (patternType) {
case Week:
case Month:
case MonthEnd:
case HjMonth:
case HjMonthEnd:
patternSpecific1 = dataBuffer.getInt(offset);
patternSpecific2 = 0;
offset += 4;
if (patternType == PatternType.Week) {
for (int day = firstDow; day < firstDow + 7; day++) {
if ((patternSpecific1 & (weekOfDayMask[day % 7])) != 0) {
allowedDaysOfWeek.add((day % 7) + 1);
}
}
}
break;
case MonthNth:
case HjMonthNth:
patternSpecific1 = dataBuffer.getInt(offset);
patternSpecific2 = dataBuffer.getInt(offset + 4);
if (patternSpecific1 == 0x7f && patternSpecific2 != 0x5) {
patternType = PatternType.Month;
}
for (int day = 0; day < 7; day++) {
if ((patternSpecific1 & (weekOfDayMask[day])) != 0) {
allowedDaysOfWeek.add((day) + 1);
}
}
offset += 8;
break;
default:
break;
}
// endType
endType = dataBuffer.getInt(offset);
offset += 4;
occurenceCount = dataBuffer.getInt(offset);
offset += 4;
firstDow = dataBuffer.getInt(offset);
offset += 4;
deletedInstanceCount = dataBuffer.getInt(offset);
offset += 4;
// deleted instances
for (int i = 0; i < deletedInstanceCount; i++) {
deletedInstances.add(windowsTimeToDateObject(dataBuffer.getInt(offset)));
offset += 4;
}
modifiedInstanceCount = dataBuffer.getInt(offset);
offset += 4;
// modified instances
modifiedInstances = new int[modifiedInstanceCount];
for (int i = 0; i < modifiedInstanceCount; i++) {
modifiedInstances[i] = dataBuffer.getInt(offset);
offset += 4;
}
startDate = dataBuffer.getInt(offset);
offset += 4;
endDate = dataBuffer.getInt(offset);
offset += 4;
offset += 16;
short exceptionCount = dataBuffer.getShort(offset);
offset += 2;
exceptionInfo = new ArrayList<ExceptionInfo>(exceptionCount);
for (int i = 0; i < exceptionCount; i++) {
ExceptionInfo tmpExceptionInfo = new ExceptionInfo(offset);
exceptionInfo.add(tmpExceptionInfo);
offset += tmpExceptionInfo.sizeInBytes();
CalendarService.BusyStatusEnum status = tmpExceptionInfo.getBusyStatus();
Date startTime = tmpExceptionInfo.getStartDate();
Date endTime = tmpExceptionInfo.getEndDate();
if (status == CalendarService.BusyStatusEnum.FREE || startTime == null || endTime == null)
continue;
Date currentTime = new Date();
if (endTime.before(currentTime) || endTime.equals(currentTime)) return;
boolean executeNow = false;
if (startTime.before(currentTime) || startTime.equals(currentTime)) executeNow = true;
CalendarItemTimerTask task =
new CalendarItemTimerTask(
status, startTime, endTime, sourceTask.getId(), executeNow, this);
task.scheduleTasks();
}
}
