1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data;
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3 |
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4 | import java.awt.geom.Area;
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5 | import java.awt.geom.Path2D;
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6 | import java.util.Collection;
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7 | import java.util.List;
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8 | import java.util.Objects;
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9 | import java.util.stream.Collectors;
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10 |
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11 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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12 | import org.openstreetmap.josm.tools.Utils;
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13 |
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14 | /**
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15 | * A data source, defined by bounds and textual description for the origin.
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16 | * @since 247 (creation)
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17 | * @since 7575 (moved package)
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18 | */
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19 | public class DataSource {
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20 |
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21 | /**
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22 | * The bounds of this data source
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23 | */
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24 | public final Bounds bounds;
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25 |
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26 | /**
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27 | * The textual description of the origin (example: "OpenStreetMap Server")
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28 | */
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29 | public final String origin;
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30 |
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31 | /**
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32 | * Constructs a new {@code DataSource}.
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33 | * @param bounds The bounds of this data source
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34 | * @param origin The textual description of the origin (example: "OpenStreetMap Server")
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35 | * @throws IllegalArgumentException if bounds is {@code null}
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36 | */
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37 | public DataSource(Bounds bounds, String origin) {
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38 | CheckParameterUtil.ensureParameterNotNull(bounds, "bounds");
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39 | this.bounds = bounds;
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40 | this.origin = origin;
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41 | }
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42 |
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43 | /**
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44 | * Constructs a new {@link DataSource}
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45 | * @param source The source to copy the data from.
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46 | * @since 10346
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47 | */
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48 | public DataSource(DataSource source) {
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49 | this(source.bounds, source.origin);
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50 | }
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51 |
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52 | @Override
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53 | public int hashCode() {
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54 | return Objects.hash(bounds, origin);
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55 | }
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56 |
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57 | @Override
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58 | public boolean equals(Object obj) {
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59 | if (this == obj) return true;
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60 | if (obj == null || getClass() != obj.getClass()) return false;
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61 | DataSource that = (DataSource) obj;
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62 | return Objects.equals(bounds, that.bounds) &&
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63 | Objects.equals(origin, that.origin);
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64 | }
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65 |
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66 | @Override
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67 | public String toString() {
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68 | return "DataSource [bounds=" + bounds + ", origin=" + origin + ']';
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69 | }
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70 |
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71 | /**
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72 | * Returns the total area of downloaded data (the "yellow rectangles").
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73 | * @param dataSources list of data sources
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74 | * @return Area object encompassing downloaded data.
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75 | * @see Data#getDataSourceArea()
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76 | */
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77 | public static Area getDataSourceArea(Collection<DataSource> dataSources) {
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78 | if (Utils.isEmpty(dataSources)) {
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79 | return null;
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80 | }
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81 | Path2D.Double p = new Path2D.Double();
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82 | for (DataSource source : dataSources) {
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83 | // create area from data bounds
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84 | p.append(source.bounds.asRect(), false);
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85 | }
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86 | return new Area(p);
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87 | }
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88 |
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89 | /**
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90 | * <p>Replies the list of data source bounds.</p>
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91 | *
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92 | * <p>Dataset maintains a list of data sources which have been merged into the
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93 | * data set. Each of these sources can optionally declare a bounding box of the
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94 | * data it supplied to the dataset.</p>
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95 | *
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96 | * <p>This method replies the list of defined (non {@code null}) bounding boxes.</p>
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97 | * @param dataSources list of data sources
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98 | *
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99 | * @return the list of data source bounds. An empty list, if no non-null data source
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100 | * bounds are defined.
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101 | * @see Data#getDataSourceBounds()
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102 | */
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103 | public static List<Bounds> getDataSourceBounds(Collection<DataSource> dataSources) {
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104 | if (dataSources == null) {
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105 | return null;
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106 | }
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107 | return dataSources.stream()
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108 | .filter(ds -> ds.bounds != null).map(ds -> ds.bounds)
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109 | .collect(Collectors.toList());
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110 | }
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111 | }
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