--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2012 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.maps.eclipse;
+
+import java.awt.Image;
+import java.util.HashSet;
+import java.util.Hashtable;
+import java.util.Map;
+import java.util.Set;
+
+import org.simantics.maps.query.IQueryListener;
+import org.simantics.maps.query.Query;
+import org.simantics.maps.tile.IFilter;
+import org.simantics.maps.tile.ITileJobQueue;
+import org.simantics.maps.tile.ITileListener;
+import org.simantics.maps.tile.ITileProvider;
+import org.simantics.maps.tile.TileKey;
+
+/**
+ * @author Tuukka Lehtonen
+ * @see TileJob
+ */
+public class TileJobQueue implements ITileJobQueue {
+
+ private ITileProvider provider;
+
+ private Map<TileKey, TileJob> queries = new Hashtable<TileKey, TileJob>();
+
+ public TileJobQueue() {
+ }
+
+ public void setTileProvider(ITileProvider provider) {
+ this.provider = provider;
+ }
+
+ public void addJob(Query<TileKey, Image> job) {
+ TileJob tj = new TileJob(job, provider);
+ queries.put(job.source, tj);
+ tj.schedule();
+ }
+
+ public void addAsFirstJob(Query<TileKey, Image> job) {
+ TileJob tj = new TileJob(job, provider);
+ queries.put(job.source, tj);
+ tj.schedule();
+ }
+
+ public void removeJob(Query<TileKey, Image> job) {
+ TileJob t = queries.remove(job.source);
+ if(t != null) {
+ t.cancel();
+ }
+ }
+
+ @Override
+ public void addJob(final TileKey key, final ITileListener listener) {
+ addJob(new Query<TileKey, Image>(key, new IQueryListener<TileKey, Image>() {
+ @Override
+ public void queryCanceled(Query<TileKey, Image> job) {
+ listener.tileCanceled(key);
+ }
+ @Override
+ public void queryFailed(Query<TileKey, Image> job, Exception error) {
+ listener.tileFailed(key, error);
+ }
+ @Override
+ public void queryComplete(Query<TileKey, Image> job, Image result) {
+ listener.tileUpdated(key, result);
+ }
+ }));
+ }
+
+ @Override
+ public void filterQueries(IFilter<TileKey> filter) {
+ Set<TileKey> keys = new HashSet<TileKey>(queries.keySet());
+ for(TileKey key : keys) {
+ if (!filter.select(key)) {
+ TileJob t = queries.remove(key);
+ if(t != null) {
+ t.cancel();
+ t.getQuery().listener.queryCanceled(t.getQuery());
+ }
+ }
+ }
+ }
+
+}