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1 /*
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2 * MapDataSource.js
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3 *
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4 * Copyright (c) 2012, Stefan Jänicke. All rights reserved.
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5 *
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6 * This library is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
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8 * License as published by the Free Software Foundation; either
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9 * version 3 of the License, or (at your option) any later version.
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10 *
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11 * This library is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * Lesser General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU Lesser General Public
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17 * License along with this library; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 * MA 02110-1301 USA
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20 */
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21
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22 /**
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23 * @class MapDataSource
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24 * implementation for aggregation of map items
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25 * @author Stefan Jänicke (stjaenicke@informatik.uni-leipzig.de)
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26 * @release 1.0
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27 * @release date: 2012-07-27
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28 * @version date: 2012-07-27
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29 *
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30 * @param {MapWidget} parent Widget
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31 * @param {JSON} options map configuration
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32 */
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33 function MapDataSource(parent, options) {
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34
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35 this.parent = parent;
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36 this.olMap = parent.openlayersMap;
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37 this.circleSets = [];
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38 this.binning = new Binning(this.olMap, options);
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39
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40 };
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41
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42 MapDataSource.prototype = {
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43
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44 /**
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45 * initializes the MapDataSource
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46 * @param {MapObject[][]} mapObjects an array of map objects of different sets
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47 */
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48 initialize : function(mapObjects) {
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49
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50 if (mapObjects != this.mapObjects) {
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51 this.binning.reset();
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52 this.binning.setObjects(mapObjects);
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53 }
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54 this.mapObjects = mapObjects;
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55
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56 var set = this.binning.getSet();
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57 this.circleSets = set.circleSets;
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58 this.binSets = set.binSets;
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59 this.hashMapping = set.hashMaps;
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60
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61 },
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62
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63 getObjectsByZoom : function() {
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64 var zoom = Math.floor(this.parent.getZoom());
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65 if (this.circleSets.length < zoom) {
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66 return null;
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67 }
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68 return this.circleSets[zoom];
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69 },
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70
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71 getAllObjects : function() {
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72 if (this.circleSets.length == 0) {
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73 return null;
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74 }
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75 return this.circleSets;
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76 },
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77
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78 getAllBins : function() {
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79 if (this.binSets.length == 0) {
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80 return null;
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81 }
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82 return this.binSets;
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83 },
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84
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85 clearOverlay : function() {
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86 var zoom = Math.floor(this.parent.getZoom());
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87 var circles = this.circleSets[zoom];
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88 for (var i in circles ) {
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89 for (var j in circles[i] ) {
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90 circles[i][j].reset();
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91 }
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92 }
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93 },
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94
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95 setOverlay : function(mapObjects) {
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96 var zoom = Math.floor(this.parent.getZoom());
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97 for (var j in mapObjects ) {
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98 for (var k in mapObjects[j] ) {
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99 var o = mapObjects[j][k];
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100 if (o.isGeospatial) {
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101 this.hashMapping[zoom][j][o.index].overlayElements.push(o);
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102 this.hashMapping[zoom][j][o.index].overlay += o.weight;
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103 }
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104 }
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105 }
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106 },
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107
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108 size : function() {
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109 if (this.circleSets.length == 0) {
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110 return 0;
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111 }
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112 return this.circleSets[0].length;
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113 },
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114
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115 getCircle : function(index, id) {
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116 var zoom = Math.floor(this.parent.getZoom());
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117 return this.hashMapping[zoom][index][id];
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118 }
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119 };
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