1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.tools;
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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 |
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8 | import org.openstreetmap.josm.data.coor.LatLon;
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9 | import org.openstreetmap.josm.data.osm.BBox;
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10 | import org.openstreetmap.josm.data.osm.Relation;
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11 | import org.openstreetmap.josm.data.osm.Way;
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12 |
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13 | /**
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14 | * Implementation of simple boolean {@link GeoProperty}.
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15 | */
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16 | public class DefaultGeoProperty implements GeoProperty<Boolean> {
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17 |
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18 | private final Area area;
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19 |
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20 | /**
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21 | * Create DefaultGeoProperty based on a collection of closed ways.
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22 | *
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23 | * @param ways the ways forming the area
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24 | */
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25 | public DefaultGeoProperty(Collection<Way> ways) {
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26 | Path2D path = new Path2D.Double();
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27 | path.setWindingRule(Path2D.WIND_EVEN_ODD);
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28 | for (Way w : ways) {
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29 | Geometry.buildPath2DLatLon(w.getNodes(), path);
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30 | }
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31 | this.area = new Area(path);
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32 | }
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33 |
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34 | /**
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35 | * Create DefaultGeoProperty based on a multipolygon relation.
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36 | *
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37 | * @param multipolygon the multipolygon
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38 | */
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39 | public DefaultGeoProperty(Relation multipolygon) {
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40 | this.area = Geometry.getAreaLatLon(multipolygon);
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41 | }
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42 |
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43 | @Override
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44 | public Boolean get(LatLon ll) {
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45 | return area.contains(ll.lon(), ll.lat());
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46 | }
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47 |
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48 | @Override
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49 | public Boolean get(BBox box) {
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50 | Area abox = new Area(box.toRectangle());
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51 | Geometry.PolygonIntersection is = Geometry.polygonIntersection(abox, area, 1e-10 /* using deg and not meters */);
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52 | switch (is) {
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53 | case FIRST_INSIDE_SECOND:
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54 | return Boolean.TRUE;
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55 | case OUTSIDE:
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56 | return Boolean.FALSE;
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57 | default:
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58 | return null;
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59 | }
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60 | }
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61 |
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62 | }
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