// License: GPL. Copyright 2007 by Immanuel Scholz and others
package org.openstreetmap.josm.io;
import static org.openstreetmap.josm.tools.I18n.tr;
import java.io.IOException;
import java.io.InputStream;
import org.openstreetmap.josm.data.Bounds;
import org.openstreetmap.josm.data.gpx.GpxData;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.gui.progress.ProgressMonitor;
import org.xml.sax.SAXException;
public class BoundingBoxDownloader extends OsmServerReader {
/**
* The boundings of the desired map data.
*/
private final double lat1;
private final double lon1;
private final double lat2;
private final double lon2;
public BoundingBoxDownloader(Bounds downloadArea) {
this.lat1 = downloadArea.getMin().lat();
this.lon1 = downloadArea.getMin().lon();
this.lat2 = downloadArea.getMax().lat();
this.lon2 = downloadArea.getMax().lon();
}
/**
* Retrieve raw gps waypoints from the server API.
* @return A list of all primitives retrieved. Currently, the list of lists
* contain only one list, since the server cannot distinguish between
* ways.
*/
public GpxData parseRawGps(ProgressMonitor progressMonitor) throws IOException, SAXException,OsmTransferException {
progressMonitor.beginTask("", 1);
try {
progressMonitor.indeterminateSubTask(tr("Contacting OSM Server..."));
String url = "trackpoints?bbox="+lon1+","+lat1+","+lon2+","+lat2+"&page=";
boolean done = false;
GpxData result = null;
for (int i = 0;!done;++i) {
progressMonitor.subTask(tr("Downloading points {0} to {1}...", i * 5000, ((i + 1) * 5000)));
InputStream in = getInputStream(url+i, progressMonitor.createSubTaskMonitor(1, true));
if (in == null) {
break;
}
progressMonitor.setTicks(0);
GpxReader reader = new GpxReader(in);
reader.parse(false);
GpxData currentGpx = reader.data;
if (result == null) {
result = currentGpx;
} else if (currentGpx.hasTrackPoints()) {
result.mergeFrom(currentGpx);
} else{
done = true;
}
in.close();
activeConnection = null;
}
result.fromServer = true;
return result;
} catch (IllegalArgumentException e) {
// caused by HttpUrlConnection in case of illegal stuff in the response
if (cancel)
return null;
throw new SAXException("Illegal characters within the HTTP-header response.", e);
} catch (IOException e) {
if (cancel)
return null;
throw e;
} catch (SAXException e) {
throw e;
} catch (OsmTransferException e) {
throw e;
} catch (RuntimeException e) {
if (cancel)
return null;
throw e;
} finally {
progressMonitor.finishTask();
}
}
/**
* Read the data from the osm server address.
* @return A data set containing all data retrieved from that url
*/
@Override
public DataSet parseOsm(ProgressMonitor progressMonitor) throws OsmTransferException {
progressMonitor.beginTask(tr("Contacting OSM Server..."), 10);
InputStream in = null;
try {
progressMonitor.indeterminateSubTask(null);
in = getInputStream("map?bbox="+lon1+","+lat1+","+lon2+","+lat2, progressMonitor.createSubTaskMonitor(9, false));
if (in == null)
return null;
return OsmReader.parseDataSet(in, progressMonitor.createSubTaskMonitor(1, false));
} catch(OsmTransferException e) {
throw e;
} catch (Exception e) {
throw new OsmTransferException(e);
} finally {
progressMonitor.finishTask();
if (in != null) {
try {in.close();} catch(IOException e) {}
}
activeConnection = null;
}
}
}