/**
* Run thru the given array of messages, apply the given Condition on each message and generate
* sets of contiguous sequence-numbers for the successful messages. If a message in the given
* array is found to be expunged, it is ignored.
*
* <p>ASSERT: Since this method uses and returns message sequence numbers, you should use this
* method only when holding the messageCacheLock.
*/
public static MessageSet[] toMessageSet(Message[] msgs, Condition cond) {
Vector v = new Vector(1);
int current, next;
IMAPMessage msg;
for (int i = 0; i < msgs.length; i++) {
msg = (IMAPMessage) msgs[i];
if (msg.isExpunged()) // expunged message, skip it
continue;
current = msg.getSequenceNumber();
// Apply the condition. If it fails, skip it.
if ((cond != null) && !cond.test(msg)) continue;
MessageSet set = new MessageSet();
set.start = current;
// Look for contiguous sequence numbers
for (++i; i < msgs.length; i++) {
// get next message
msg = (IMAPMessage) msgs[i];
if (msg.isExpunged()) // expunged message, skip it
continue;
next = msg.getSequenceNumber();
// Does this message match our condition ?
if ((cond != null) && !cond.test(msg)) continue;
if (next == current + 1) current = next;
else { // break in sequence
// We need to reexamine this message at the top of
// the outer loop, so decrement 'i' to cancel the
// outer loop's autoincrement
i--;
break;
}
}
set.end = current;
v.addElement(set);
}
if (v.isEmpty()) // No valid messages
return null;
else {
MessageSet[] sets = new MessageSet[v.size()];
v.copyInto(sets);
return sets;
}
}
/*
* Get the enclosing message's sequence number. Overrides
* IMAPMessage.getSequenceNumber().
*/
protected int getSequenceNumber() {
return msg.getSequenceNumber();
}
