org.simantics.district.maps/src/org/simantics/maps/eclipse/TileJobQueue.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.maps.eclipse;
  13
  14 import java.awt.Image;
  15 import java.util.HashSet;
  16 import java.util.Hashtable;
  17 import java.util.Map;
  18 import java.util.Set;
  19
  20 import org.simantics.maps.query.IQueryListener;
  21 import org.simantics.maps.query.Query;
  22 import org.simantics.maps.tile.IFilter;
  23 import org.simantics.maps.tile.ITileJobQueue;
  24 import org.simantics.maps.tile.ITileListener;
  25 import org.simantics.maps.tile.ITileProvider;
  26 import org.simantics.maps.tile.TileKey;
  27
  28 /**
  29  * @author Tuukka Lehtonen
  30  * @see TileJob
  31  */
  32 public class TileJobQueue implements ITileJobQueue {
  33
  34     private ITileProvider provider;
  35
  36     private Map<TileKey, TileJob> queries = new Hashtable<TileKey, TileJob>();
  37
  38     public TileJobQueue() {
  39     }
  40
  41     public void setTileProvider(ITileProvider provider) {
  42         this.provider = provider;
  43     }
  44
  45     public void addJob(Query<TileKey, Image> job) {
  46         TileJob tj = new TileJob(job, provider);
  47         queries.put(job.source, tj);
  48         tj.schedule();
  49     }
  50
  51     public void addAsFirstJob(Query<TileKey, Image> job) {
  52         TileJob tj = new TileJob(job, provider);
  53         queries.put(job.source, tj);
  54         tj.schedule();
  55     }
  56
  57     public void removeJob(Query<TileKey, Image> job) {
  58         TileJob t = queries.remove(job.source);
  59         if(t != null) {
  60             t.cancel();
  61         }
  62     }
  63
  64     @Override
  65     public void addJob(final TileKey key, final ITileListener listener) {
  66         addJob(new Query<TileKey, Image>(key, new IQueryListener<TileKey, Image>() {
  67             @Override
  68             public void queryCanceled(Query<TileKey, Image> job) {
  69                 listener.tileCanceled(key);
  70             }
  71             @Override
  72             public void queryFailed(Query<TileKey, Image> job, Exception error) {
  73                 listener.tileFailed(key, error);
  74             }
  75             @Override
  76             public void queryComplete(Query<TileKey, Image> job, Image result) {
  77                 listener.tileUpdated(key, result);
  78             }
  79         }));
  80     }
  81
  82     @Override
  83     public void filterQueries(IFilter<TileKey> filter) {
  84         Set<TileKey> keys = new HashSet<TileKey>(queries.keySet());
  85         for(TileKey key : keys) {
  86             if (!filter.select(key)) {
  87                 TileJob t = queries.remove(key);
  88                 if(t != null) {
  89                     t.cancel();
  90                     t.getQuery().listener.queryCanceled(t.getQuery());
  91                 }
  92             }
  93         }
  94     }
  95
  96 }