[2907] | 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.data.gpx;
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| 3 |
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| 4 | import java.util.ArrayList;
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| 5 | import java.util.Collection;
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| 6 | import java.util.Collections;
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[10906] | 7 | import java.util.List;
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[2907] | 8 |
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| 9 | import org.openstreetmap.josm.data.Bounds;
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| 10 |
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[12186] | 11 | /**
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| 12 | * A gpx track segment consisting of multiple waypoints, that cannot be changed.
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| 13 | */
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[2907] | 14 | public class ImmutableGpxTrackSegment implements GpxTrackSegment {
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| 15 |
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[10906] | 16 | private final List<WayPoint> wayPoints;
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[2907] | 17 | private final Bounds bounds;
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| 18 | private final double length;
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| 19 |
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[10906] | 20 | /**
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| 21 | * Constructs a new {@code ImmutableGpxTrackSegment}.
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| 22 | * @param wayPoints list of waypoints
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| 23 | */
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[2907] | 24 | public ImmutableGpxTrackSegment(Collection<WayPoint> wayPoints) {
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[10906] | 25 | this.wayPoints = Collections.unmodifiableList(new ArrayList<>(wayPoints));
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[2907] | 26 | this.bounds = calculateBounds();
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| 27 | this.length = calculateLength();
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| 28 | }
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| 29 |
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| 30 | private Bounds calculateBounds() {
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| 31 | Bounds result = null;
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| 32 | for (WayPoint wpt: wayPoints) {
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| 33 | if (result == null) {
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| 34 | result = new Bounds(wpt.getCoor());
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| 35 | } else {
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| 36 | result.extend(wpt.getCoor());
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| 37 | }
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| 38 | }
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| 39 | return result;
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| 40 | }
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| 41 |
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| 42 | private double calculateLength() {
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| 43 | double result = 0.0; // in meters
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| 44 | WayPoint last = null;
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| 45 | for (WayPoint tpt : wayPoints) {
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[8510] | 46 | if (last != null) {
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[2907] | 47 | Double d = last.getCoor().greatCircleDistance(tpt.getCoor());
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[8510] | 48 | if (!d.isNaN() && !d.isInfinite()) {
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[2907] | 49 | result += d;
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| 50 | }
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| 51 | }
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| 52 | last = tpt;
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| 53 | }
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| 54 | return result;
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| 55 | }
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| 56 |
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[6084] | 57 | @Override
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[2907] | 58 | public Bounds getBounds() {
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[11553] | 59 | return bounds == null ? null : new Bounds(bounds);
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[2907] | 60 | }
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| 61 |
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[6084] | 62 | @Override
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[2907] | 63 | public Collection<WayPoint> getWayPoints() {
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[12186] | 64 | return Collections.unmodifiableList(wayPoints);
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[2907] | 65 | }
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| 66 |
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[6084] | 67 | @Override
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[2907] | 68 | public double length() {
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| 69 | return length;
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| 70 | }
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| 71 |
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[6084] | 72 | @Override
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[3119] | 73 | public int getUpdateCount() {
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| 74 | return 0;
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| 75 | }
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| 76 |
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[10906] | 77 | @Override
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| 78 | public int hashCode() {
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| 79 | return 31 + ((wayPoints == null) ? 0 : wayPoints.hashCode());
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| 80 | }
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| 81 |
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| 82 | @Override
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| 83 | public boolean equals(Object obj) {
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| 84 | if (this == obj)
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| 85 | return true;
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| 86 | if (obj == null)
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| 87 | return false;
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| 88 | if (getClass() != obj.getClass())
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| 89 | return false;
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| 90 | ImmutableGpxTrackSegment other = (ImmutableGpxTrackSegment) obj;
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| 91 | if (wayPoints == null) {
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| 92 | if (other.wayPoints != null)
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| 93 | return false;
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| 94 | } else if (!wayPoints.equals(other.wayPoints))
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| 95 | return false;
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| 96 | return true;
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| 97 | }
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[2907] | 98 | }
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