/*
* Copyright 2013 MovingBlocks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.terasology.monitoring.chunk;
import com.google.common.base.Preconditions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.terasology.math.Vector3i;
import org.terasology.world.chunks.Chunk;
import java.lang.ref.WeakReference;
import java.util.Deque;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
public class ChunkMonitorEntry {
private static final Logger logger = LoggerFactory.getLogger(ChunkMonitorEntry.class);
private final Vector3i pos;
private Deque<WeakReference<Chunk>> chunks = new LinkedList<>();
private List<ChunkMonitorEvent.BasicChunkEvent> events = new LinkedList<>();
public ChunkMonitorEntry(Vector3i pos) {
this.pos = Preconditions.checkNotNull(pos, "The parameter 'pos' must not be null");
}
private void purge() {
if (chunks.size() == 0) {
return;
}
final Iterator<WeakReference<Chunk>> it = chunks.iterator();
while (it.hasNext()) {
final WeakReference<Chunk> w = it.next();
if (w.get() == null) {
it.remove();
}
}
}
public Vector3i getPosition() {
return new Vector3i(pos);
}
public Chunk getLatestChunk() {
final WeakReference<Chunk> chunk = chunks.peekLast();
if (chunk != null) {
return chunk.get();
}
return null;
}
public void addChunk(Chunk value) {
Preconditions.checkNotNull(value, "The parameter 'value' must not be null");
Preconditions.checkArgument(pos.equals(value.getPosition()), "Expected chunk for position {} but got position {} instead", pos, value.getPosition());
purge();
chunks.add(new WeakReference<>(value));
}
public void addEvent(ChunkMonitorEvent.BasicChunkEvent event) {
Preconditions.checkNotNull(event, "The parameter 'event' must not be null");
Preconditions.checkArgument(pos.equals(event.position), "Expected event for position {} but got position {} instead", pos, event.position);
events.add(event);
}
}