001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.io;
003
004import static org.openstreetmap.josm.tools.I18n.tr;
005
006import java.io.File;
007import java.io.FileInputStream;
008import java.io.FileNotFoundException;
009import java.io.IOException;
010import java.io.InputStream;
011
012import javax.swing.JOptionPane;
013
014import org.openstreetmap.josm.Main;
015import org.openstreetmap.josm.actions.ExtensionFileFilter;
016import org.openstreetmap.josm.data.osm.DataSet;
017import org.openstreetmap.josm.gui.layer.OsmDataLayer;
018import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
019import org.openstreetmap.josm.gui.progress.ProgressMonitor;
020import org.openstreetmap.josm.gui.util.GuiHelper;
021import org.openstreetmap.josm.tools.Utils;
022
023public class OsmImporter extends FileImporter {
024
025    public static final ExtensionFileFilter FILE_FILTER = new ExtensionFileFilter(
026            "osm,xml", "osm", tr("OSM Server Files") + " (*.osm *.xml)");
027
028    public static class OsmImporterData {
029
030        private OsmDataLayer layer;
031        private Runnable postLayerTask;
032
033        public OsmImporterData(OsmDataLayer layer, Runnable postLayerTask) {
034            this.layer = layer;
035            this.postLayerTask = postLayerTask;
036        }
037
038        public OsmDataLayer getLayer() {
039            return layer;
040        }
041
042        public Runnable getPostLayerTask() {
043            return postLayerTask;
044        }
045    }
046
047    public OsmImporter() {
048        super(FILE_FILTER);
049    }
050
051    public OsmImporter(ExtensionFileFilter filter) {
052        super(filter);
053    }
054
055    /**
056     * Imports OSM data from file
057     * @param file file to read data from
058     * @param progressMonitor handler for progress monitoring and canceling
059     */
060    @Override
061    public void importData(File file, ProgressMonitor progressMonitor) throws IOException, IllegalDataException {
062        FileInputStream in = null;
063        try {
064            in = new FileInputStream(file);
065            importData(in, file, progressMonitor);
066        } catch (FileNotFoundException e) {
067            e.printStackTrace();
068            throw new IOException(tr("File ''{0}'' does not exist.", file.getName()));
069        } finally {
070            Utils.close(in);
071        }
072    }
073
074    /**
075     * Imports OSM data from stream
076     * @param in input stream
077     * @param associatedFile filename of data
078     */
079    protected void importData(InputStream in, final File associatedFile) throws IllegalDataException {
080        importData(in, associatedFile, NullProgressMonitor.INSTANCE);
081    }
082
083    /**
084     * Imports OSM data from stream
085     * @param in input stream
086     * @param associatedFile filename of data (layer name will be generated from name of file)
087     * @param pm handler for progress monitoring and canceling
088     */
089    protected void importData(InputStream in, final File associatedFile, ProgressMonitor pm) throws IllegalDataException {
090        final OsmImporterData data = loadLayer(in, associatedFile,
091                associatedFile == null ? OsmDataLayer.createNewName() : associatedFile.getName(), pm);
092
093        // FIXME: remove UI stuff from IO subsystem
094        GuiHelper.runInEDT(new Runnable() {
095            @Override
096            public void run() {
097                Main.main.addLayer(data.layer);
098                data.postLayerTask.run();
099                data.layer.onPostLoadFromFile();
100            }
101        });
102    }
103
104    /**
105     * Load osm data layer from InputStream.
106     * @param in input stream
107     * @param associatedFile filename of data (can be <code>null</code> if the stream does not come from a file)
108     * @param layerName name of generated layer
109     * @param progressMonitor handler for progress monitoring and canceling
110     */
111    public OsmImporterData loadLayer(InputStream in, final File associatedFile, final String layerName, ProgressMonitor progressMonitor) throws IllegalDataException {
112        final DataSet dataSet = parseDataSet(in, progressMonitor);
113        if (dataSet == null) {
114            throw new IllegalDataException(tr("Invalid dataset"));
115        }
116        OsmDataLayer layer = createLayer(dataSet, associatedFile, layerName);
117        Runnable postLayerTask = createPostLayerTask(dataSet, associatedFile, layerName, layer);
118        return new OsmImporterData(layer, postLayerTask);
119    }
120
121    protected DataSet parseDataSet(InputStream in, ProgressMonitor progressMonitor) throws IllegalDataException {
122        return OsmReader.parseDataSet(in, progressMonitor);
123    }
124
125    protected OsmDataLayer createLayer(final DataSet dataSet, final File associatedFile, final String layerName) {
126        return new OsmDataLayer(dataSet, layerName, associatedFile);
127    }
128
129    protected Runnable createPostLayerTask(final DataSet dataSet, final File associatedFile, final String layerName, final OsmDataLayer layer) {
130        return new Runnable() {
131            @Override
132            public void run() {
133                if (dataSet.allPrimitives().isEmpty()) {
134                    String msg;
135                    if (associatedFile == null) {
136                        msg = tr("No data found for layer ''{0}''.", layerName);
137                    } else {
138                        msg = tr("No data found in file ''{0}''.", associatedFile.getPath());
139                    }
140                    JOptionPane.showMessageDialog(
141                            Main.parent,
142                            msg,
143                            tr("Open OSM file"),
144                            JOptionPane.INFORMATION_MESSAGE);
145                }
146                layer.onPostLoadFromFile();
147            }
148        };
149    }
150}