/* * Copyright 2010, 2011, 2012 mapsforge.org * * This program is free software: you can redistribute it and/or modify it under the * terms of the GNU Lesser General Public License as published by the Free Software * Foundation, either version 3 of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License along with * this program. If not, see <http://www.gnu.org/licenses/>. */ package org.mapsforge.core.model; import java.io.IOException; import java.io.ObjectInputStream; import java.io.Serializable; /** * A MapPosition represents an immutable pair of {@link GeoPoint} and zoom level. */ public class MapPosition implements Serializable { private static final long serialVersionUID = 1L; /** * The map position. */ public final GeoPoint geoPoint; /** * The zoom level. */ public final byte zoomLevel; /** * The hash code of this object. */ private transient int hashCodeValue; /** * @param geoPoint * the map position. * @param zoomLevel * the zoom level. */ public MapPosition(GeoPoint geoPoint, byte zoomLevel) { this.geoPoint = geoPoint; this.zoomLevel = zoomLevel; this.hashCodeValue = calculateHashCode(); } @Override public boolean equals(Object obj) { if (this == obj) { return true; } else if (!(obj instanceof MapPosition)) { return false; } MapPosition other = (MapPosition) obj; if (this.geoPoint == null) { if (other.geoPoint != null) { return false; } } else if (!this.geoPoint.equals(other.geoPoint)) { return false; } if (this.zoomLevel != other.zoomLevel) { return false; } return true; } @Override public int hashCode() { return this.hashCodeValue; } @Override public String toString() { StringBuilder stringBuilder = new StringBuilder(); stringBuilder.append("MapPosition [geoPoint="); stringBuilder.append(this.geoPoint); stringBuilder.append(", zoomLevel="); stringBuilder.append(this.zoomLevel); stringBuilder.append("]"); return stringBuilder.toString(); } /** * @return the hash code of this object. */ private int calculateHashCode() { int result = 7; result = 31 * result + ((this.geoPoint == null) ? 0 : this.geoPoint.hashCode()); result = 31 * result + this.zoomLevel; return result; } private void readObject(ObjectInputStream objectInputStream) throws IOException, ClassNotFoundException { objectInputStream.defaultReadObject(); this.hashCodeValue = calculateHashCode(); } }