source: josm/src/org/openstreetmap/josm/actions/OpenAction.java@ 295

package org.openstreetmap.josm.actions;

import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Collection;
import java.util.LinkedList;
import java.util.zip.GZIPInputStream;

import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.gui.layer.OsmDataLayer;
import org.openstreetmap.josm.gui.layer.RawGpsLayer;
import org.openstreetmap.josm.gui.layer.RawGpsLayer.GpsPoint;
import org.openstreetmap.josm.gui.layer.markerlayer.Marker;
import org.openstreetmap.josm.gui.layer.markerlayer.MarkerLayer;
import org.openstreetmap.josm.io.OsmReader;
import org.openstreetmap.josm.io.RawCsvReader;
import org.openstreetmap.josm.io.RawGpsReader;
import org.xml.sax.SAXException;

/**
 * Open a file chooser dialog and select an file to import. Than call the gpx-import
 * driver. Finally open an internal frame into the main window with the gpx data shown.
 * 
 * @author imi
 */
public class OpenAction extends DiskAccessAction {
        
        /**
         * Create an open action. The name is "Open a file".
         */
        public OpenAction() {
                super(tr("Open"), "open", tr("Open a file."), KeyEvent.VK_O, InputEvent.CTRL_DOWN_MASK);
        }

        public void actionPerformed(ActionEvent e) {
                JFileChooser fc = createAndOpenFileChooser(true, true);
                if (fc == null)
                        return;
                File[] files = fc.getSelectedFiles();
                for (int i = files.length; i > 0; --i)
                        openFile(files[i-1]);
        }

        /**
         * Open the given file.
         */
        public void openFile(File file) {
                try {
                        if (asRawData(file.getName()))
                                openFileAsRawGps(file);
                        else
                                openAsData(file);
                } catch (SAXException x) {
                        x.printStackTrace();
                        JOptionPane.showMessageDialog(Main.parent, tr("Error while parsing {0}",file.getName())+": "+x.getMessage());
                } catch (IOException x) {
                        x.printStackTrace();
                        JOptionPane.showMessageDialog(Main.parent, tr("Could not read \"{0}\"",file.getName())+"\n"+x.getMessage());
                }
        }

        private void openAsData(File file) throws SAXException, IOException, FileNotFoundException {
            String fn = file.getName();
            if (ExtensionFileFilter.filters[ExtensionFileFilter.OSM].acceptName(fn)) {
                DataSet dataSet = OsmReader.parseDataSet(new FileInputStream(file), null, Main.pleaseWaitDlg);
                OsmDataLayer layer = new OsmDataLayer(dataSet, file.getName(), file);
            Main.main.addLayer(layer);
            } else if (ExtensionFileFilter.filters[ExtensionFileFilter.CSV].acceptName(fn))
                JOptionPane.showMessageDialog(Main.parent, fn+": "+tr("CSV Data import for non-GPS data is not implemented yet."));
            else
                JOptionPane.showMessageDialog(Main.parent, fn+": "+tr("Unknown file extension: {0}", fn.substring(file.getName().lastIndexOf('.')+1)));
    }

        private void openFileAsRawGps(File file) throws SAXException, IOException, FileNotFoundException {
            String fn = file.getName();
            Collection<Collection<GpsPoint>> gpsData = null;
            Collection<Marker> markerData = null;
            if (ExtensionFileFilter.filters[ExtensionFileFilter.GPX].acceptName(fn)) {
                RawGpsReader r = null;
                if (file.getName().endsWith(".gpx.gz"))
                        r = new RawGpsReader(new GZIPInputStream(new FileInputStream(file)), file.getAbsoluteFile().getParentFile());
                else
                        r = new RawGpsReader(new FileInputStream(file), file.getAbsoluteFile().getParentFile());
                gpsData = r.trackData;
                markerData = r.markerData;
            } else if (ExtensionFileFilter.filters[ExtensionFileFilter.CSV].acceptName(fn)) {
                gpsData = new LinkedList<Collection<GpsPoint>>();
                gpsData.add(new RawCsvReader(new FileReader(file)).parse());
            } else
                throw new IllegalStateException();
            if (gpsData != null && !gpsData.isEmpty())
                Main.main.addLayer(new RawGpsLayer(false, gpsData, tr("Tracks from {0}", file.getName()), file));
            if (markerData != null && !markerData.isEmpty())
                Main.main.addLayer(new MarkerLayer(markerData, tr ("Markers from {0}", file.getName()), file));
    }

        /**
         * @return Return whether the file should be opened as raw gps data. May ask the
         * user, if unsure.
         */
        private boolean asRawData(String fn) {
                if (ExtensionFileFilter.filters[ExtensionFileFilter.CSV].acceptName(fn))
                        return true;
                if (!ExtensionFileFilter.filters[ExtensionFileFilter.GPX].acceptName(fn))
                        return false;
                return true;
        }
}