/** @since 2.0 */
@Override
public synchronized ITmfContext seekEvent(final ITmfTimestamp timestamp) {
// A null timestamp indicates to seek the first event
if (timestamp == null) {
ITmfContext context = seekEvent((ITmfLocation) null);
context.setRank(0);
return context;
}
// Position the trace at the checkpoint
ITmfContext context = fIndexer.seekIndex(timestamp);
// And locate the requested event context
ITmfLocation previousLocation = context.getLocation();
long previousRank = context.getRank();
ITmfEvent event = getNext(context);
while (event != null && event.getTimestamp().compareTo(timestamp, false) < 0) {
previousLocation = context.getLocation();
previousRank = context.getRank();
event = getNext(context);
}
if (event == null) {
context.setLocation(null);
context.setRank(ITmfContext.UNKNOWN_RANK);
} else {
context.dispose();
context = seekEvent(previousLocation);
context.setRank(previousRank);
}
return context;
}
/**
* Update the trace attributes
*
* @param context the current trace context
* @param timestamp the corresponding timestamp
* @since 2.0
*/
protected synchronized void updateAttributes(
final ITmfContext context, final ITmfTimestamp timestamp) {
if (fStartTime.equals(TmfTimestamp.BIG_BANG) || (fStartTime.compareTo(timestamp, false) > 0)) {
fStartTime = timestamp;
}
if (fEndTime.equals(TmfTimestamp.BIG_CRUNCH) || (fEndTime.compareTo(timestamp, false) < 0)) {
fEndTime = timestamp;
}
if (context.hasValidRank()) {
long rank = context.getRank();
if (fNbEvents <= rank) {
fNbEvents = rank + 1;
}
if (fIndexer != null) {
fIndexer.updateIndex(context, timestamp);
}
}
}
@Override
public synchronized ITmfContext seekEvent(final long rank) {
// A rank <= 0 indicates to seek the first event
if (rank <= 0) {
ITmfContext context = seekEvent((ITmfLocation) null);
context.setRank(0);
return context;
}
// Position the trace at the checkpoint
final ITmfContext context = fIndexer.seekIndex(rank);
// And locate the requested event context
long pos = context.getRank();
if (pos < rank) {
ITmfEvent event = getNext(context);
while ((event != null) && (++pos < rank)) {
event = getNext(context);
}
}
return context;
}
