Java tutorial
/* gvSIG Mini. A free mobile phone viewer of free maps. * * Copyright (C) 2009 Prodevelop. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA. * * For more information, contact: * * Prodevelop, S.L. * Pza. Don Juan de Villarrasa, 14 - 5 * 46001 Valencia * Spain * * +34 963 510 612 * +34 963 510 968 * prode@prodevelop.es * http://www.prodevelop.es * * gvSIG Mini has been partially funded by IMPIVA (Instituto de la Pequea y * Mediana Empresa de la Comunidad Valenciana) & * European Union FEDER funds. * * 2009. * author Alberto Romeu aromeu@prodevelop.es * author Ruben Blanco rblanco@prodevelop.es * */ package es.prodevelop.gvsig.mini.tasks.yours; import java.io.BufferedInputStream; import java.io.IOException; import java.io.InputStream; import java.net.URL; import java.net.URLConnection; import java.util.logging.Level; import java.util.logging.Logger; import org.apache.http.util.ByteArrayBuffer; import android.os.Handler; import android.os.Message; import es.prodevelop.gvsig.mini.activities.Map; import es.prodevelop.gvsig.mini.common.CompatManager; import es.prodevelop.gvsig.mini.exceptions.BaseException; import es.prodevelop.gvsig.mini.geom.Point; import es.prodevelop.gvsig.mini.tasks.Functionality; import es.prodevelop.gvsig.mini.tasks.TaskHandler; import es.prodevelop.gvsig.mini.utiles.Tags; import es.prodevelop.gvsig.mini.yours.Route; import es.prodevelop.gvsig.mini.yours.RouteManager; /** * Queries the YOURS service with the start and end point, set by the user, * parses the response and notifies the MapHandler: Map.ROUTE_CANCELED = The * user cancels the route task Map.ROUTE_SUCCEEDED = The route has been * calculated Map.ROUTE_INITED = THe route task inits Map.ROUTE_NO_CALCULATED = * The server can't calculate the route Map.ROUTE_NO_RESPONSE = The server is * busy * * @author aromeu * @author rblanco * */ public class YOURSFunctionality extends Functionality { Route route; int res = TaskHandler.INITED; YOURSHandler handler; private final static Logger log = Logger.getLogger(YOURSFunctionality.class.getName()); public YOURSFunctionality(Map map, int id) { super(map, id); this.route = RouteManager.getInstance().getRegisteredRoute(); handler = new YOURSHandler(); this.addObserver(handler); try { CompatManager.getInstance().getRegisteredLogHandler().configureLogger(log); } catch (BaseException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public Handler getHandler() { return handler; } @Override public boolean execute() { try { final Point ini = (Point) route.getStartPoint().clone(); final Point end = (Point) route.getEndPoint().clone(); final String routeString = route.toYOURS(ini, end); log.log(Level.FINE, routeString); /* Define the URL we want to load data from. */ URL parseURL = new URL(routeString); /* Open a connection to that URL. */ if (this.isCanceled()) { res = TaskHandler.CANCELED; return true; } URLConnection urlconnec = parseURL.openConnection(); urlconnec.setRequestProperty("X-Yours-client", "gvSIG"); urlconnec.setReadTimeout(30000); /* Define InputStreams to read from the URLConnection. */ InputStream is = urlconnec.getInputStream(); BufferedInputStream bis = new BufferedInputStream(is); /* * Read bytes to the Buffer until there is nothing more to read(-1). */ ByteArrayBuffer baf = new ByteArrayBuffer(50); int current = 0; while ((current = bis.read()) != -1) { if (isCanceled()) { res = TaskHandler.CANCELED; return true; } baf.append((byte) current); } res = route.fromYOURS(baf.toByteArray()); } catch (IOException e) { res = TaskHandler.NO_RESPONSE; } catch (Exception e) { res = TaskHandler.ERROR; log.log(Level.SEVERE, "", e); } finally { // handler.sendEmptyMessage(map.ROUTE_SUCCEEDED); try { // if (res == -1) { // handler.sendEmptyMessage(map.ROUTE_CANCELED); if (res == -2) { res = TaskHandler.NO_RESPONSE; } else if (res == -3) { res = TaskHandler.BAD_RESPONSE; } else if (res == 1) { res = TaskHandler.FINISHED; if (route.getState() == Tags.ROUTE_WITH_START_AND_PASS_POINT) { route.setState(Tags.ROUTE_WITH_N_POINT); } else if (route.getState() == Tags.ROUTE_WITH_START_POINT) { route.setState(Tags.ROUTE_WITH_2_POINT); } } } catch (Exception e) { log.log(Level.SEVERE, "", e); } finally { // super.stop(); } return true; } } @Override public int getMessage() { return res; } private class YOURSHandler extends TaskHandler { @Override public void handleMessage(final Message msg) { switch (msg.what) { case TaskHandler.CANCELED: getMap().getMapHandler().sendEmptyMessage(Map.ROUTE_CANCELED); break; case TaskHandler.FINISHED: getMap().getMapHandler().sendEmptyMessage(Map.ROUTE_SUCCEEDED); break; case TaskHandler.INITED: getMap().getMapHandler().sendEmptyMessage(Map.ROUTE_INITED); break; case TaskHandler.ERROR: getMap().getMapHandler().sendEmptyMessage(Map.ROUTE_NO_CALCULATED); break; case TaskHandler.NO_RESPONSE: getMap().getMapHandler().sendEmptyMessage(Map.ROUTE_NO_RESPONSE); break; case TaskHandler.BAD_RESPONSE: getMap().getMapHandler().sendEmptyMessage(Map.ROUTE_NO_CALCULATED); break; case Map.ROUTE_ORIENTATION_CHANGED: // route.deleteRoute(); // cancel(); break; } } } }