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[simantics/district.git] / org.simantics.district.maps / src / org / simantics / maps / eclipse / TileJobQueue.java

diff --git a/org.simantics.district.maps/src/org/simantics/maps/eclipse/TileJobQueue.java b/org.simantics.district.maps/src/org/simantics/maps/eclipse/TileJobQueue.java
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+/*******************************************************************************
+ * 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());
+                }
+            }
+        }
+    }
+
+}