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/*
* Bitronix Transaction Manager
*
* Copyright (c) 2010, Bitronix Software.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package bitronix.tm.mock.events;
import java.util.*;
/**
*
* @author lorban
*/
public class EventsIterator implements Iterator {
private Iterator[] eventRecorderIterators;
private Event[] nextEvents;
public EventsIterator(Map eventRecorders) {
int size = eventRecorders.size();
eventRecorderIterators = new Iterator[size];
nextEvents = new Event[size];
int i = 0;
Iterator it = eventRecorders.entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
EventRecorder er = (EventRecorder) entry.getValue();
eventRecorderIterators[i] = er.getEvents().iterator();
if (eventRecorderIterators[i].hasNext())
nextEvents[i] = (Event) eventRecorderIterators[i].next();
i++;
}
}
public void remove() {
}
public boolean hasNext() {
for (int i = 0; i < nextEvents.length; i++) {
Event nextEvent = nextEvents[i];
if (nextEvent != null)
return true;
}
return false;
}
public Object next() {
Event current = null;
int index = -1;
for (int i = 0; i < nextEvents.length; i++) {
Event nextEvent = nextEvents[i];
if (nextEvent == null)
continue;
if (current == null) {
current = nextEvent;
index = i;
}
else if (nextEvent.getTimestamp() < current.getTimestamp()) {
current = nextEvent;
index = i;
}
}
if (index != -1) {
if (eventRecorderIterators[index].hasNext())
nextEvents[index] = (Event) eventRecorderIterators[index].next();
else
nextEvents[index] = null;
}
return current;
}
}
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