| 1 | // License: GPL. For details, see LICENSE file.
|
|---|
| 2 | package org.openstreetmap.josm.io;
|
|---|
| 3 |
|
|---|
| 4 | import static org.openstreetmap.josm.tools.I18n.tr;
|
|---|
| 5 |
|
|---|
| 6 | import java.io.File;
|
|---|
| 7 | import java.io.IOException;
|
|---|
| 8 | import java.io.OutputStream;
|
|---|
| 9 | import java.io.OutputStreamWriter;
|
|---|
| 10 | import java.io.PrintWriter;
|
|---|
| 11 | import java.io.Writer;
|
|---|
| 12 | import java.nio.charset.StandardCharsets;
|
|---|
| 13 | import java.text.MessageFormat;
|
|---|
| 14 |
|
|---|
| 15 | import javax.swing.JOptionPane;
|
|---|
| 16 |
|
|---|
| 17 | import org.openstreetmap.josm.Main;
|
|---|
| 18 | import org.openstreetmap.josm.actions.ExtensionFileFilter;
|
|---|
| 19 | import org.openstreetmap.josm.gui.layer.Layer;
|
|---|
| 20 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
|
|---|
| 21 | import org.openstreetmap.josm.tools.Utils;
|
|---|
| 22 |
|
|---|
| 23 | /**
|
|---|
| 24 | * Exports data to an .osm file.
|
|---|
| 25 | * @since 1949
|
|---|
| 26 | */
|
|---|
| 27 | public class OsmExporter extends FileExporter {
|
|---|
| 28 |
|
|---|
| 29 | /**
|
|---|
| 30 | * Constructs a new {@code OsmExporter}.
|
|---|
| 31 | */
|
|---|
| 32 | public OsmExporter() {
|
|---|
| 33 | super(new ExtensionFileFilter(
|
|---|
| 34 | "osm,xml", "osm", tr("OSM Server Files") + " (*.osm)"));
|
|---|
| 35 | }
|
|---|
| 36 |
|
|---|
| 37 | /**
|
|---|
| 38 | * Constructs a new {@code OsmExporter}.
|
|---|
| 39 | * @param filter The extension file filter
|
|---|
| 40 | */
|
|---|
| 41 | public OsmExporter(ExtensionFileFilter filter) {
|
|---|
| 42 | super(filter);
|
|---|
| 43 | }
|
|---|
| 44 |
|
|---|
| 45 | @Override
|
|---|
| 46 | public boolean acceptFile(File pathname, Layer layer) {
|
|---|
| 47 | if (!(layer instanceof OsmDataLayer))
|
|---|
| 48 | return false;
|
|---|
| 49 | return super.acceptFile(pathname, layer);
|
|---|
| 50 | }
|
|---|
| 51 |
|
|---|
| 52 | @Override
|
|---|
| 53 | public void exportData(File file, Layer layer) throws IOException {
|
|---|
| 54 | exportData(file, layer, false);
|
|---|
| 55 | }
|
|---|
| 56 |
|
|---|
| 57 | /**
|
|---|
| 58 | * Exports OSM data to the given file.
|
|---|
| 59 | * @param file Output file
|
|---|
| 60 | * @param layer Data layer. Must be an instance of {@link OsmDataLayer}.
|
|---|
| 61 | * @param noBackup if {@code true}, the potential backup file created if the output file already exists will be deleted
|
|---|
| 62 | * after a successful export
|
|---|
| 63 | * @throws IllegalArgumentException if {@code layer} is not an instance of {@code OsmDataLayer}
|
|---|
| 64 | */
|
|---|
| 65 | public void exportData(File file, Layer layer, boolean noBackup) {
|
|---|
| 66 | checkOsmDataLayer(layer);
|
|---|
| 67 | save(file, (OsmDataLayer) layer, noBackup);
|
|---|
| 68 | }
|
|---|
| 69 |
|
|---|
| 70 | protected static void checkOsmDataLayer(Layer layer) {
|
|---|
| 71 | if (!(layer instanceof OsmDataLayer)) {
|
|---|
| 72 | throw new IllegalArgumentException(MessageFormat.format("Expected instance of OsmDataLayer. Got ''{0}''.", layer
|
|---|
| 73 | .getClass().getName()));
|
|---|
| 74 | }
|
|---|
| 75 | }
|
|---|
| 76 |
|
|---|
| 77 | protected static OutputStream getOutputStream(File file) throws IOException {
|
|---|
| 78 | return Compression.getCompressedFileOutputStream(file);
|
|---|
| 79 | }
|
|---|
| 80 |
|
|---|
| 81 | private void save(File file, OsmDataLayer layer, boolean noBackup) {
|
|---|
| 82 | File tmpFile = null;
|
|---|
| 83 | try {
|
|---|
| 84 | // use a tmp file because if something errors out in the process of writing the file,
|
|---|
| 85 | // we might just end up with a truncated file. That can destroy lots of work.
|
|---|
| 86 | if (file.exists()) {
|
|---|
| 87 | tmpFile = new File(file.getPath() + '~');
|
|---|
| 88 | Utils.copyFile(file, tmpFile);
|
|---|
| 89 | }
|
|---|
| 90 |
|
|---|
| 91 | doSave(file, layer);
|
|---|
| 92 | if ((noBackup || !Main.pref.getBoolean("save.keepbackup", false)) && tmpFile != null) {
|
|---|
| 93 | Utils.deleteFile(tmpFile);
|
|---|
| 94 | }
|
|---|
| 95 | layer.onPostSaveToFile();
|
|---|
| 96 | } catch (IOException e) {
|
|---|
| 97 | Main.error(e);
|
|---|
| 98 | JOptionPane.showMessageDialog(
|
|---|
| 99 | Main.parent,
|
|---|
| 100 | tr("<html>An error occurred while saving.<br>Error is:<br>{0}</html>", e.getMessage()),
|
|---|
| 101 | tr("Error"),
|
|---|
| 102 | JOptionPane.ERROR_MESSAGE
|
|---|
| 103 | );
|
|---|
| 104 |
|
|---|
| 105 | try {
|
|---|
| 106 | // if the file save failed, then the tempfile will not be deleted. So, restore the backup if we made one.
|
|---|
| 107 | if (tmpFile != null && tmpFile.exists()) {
|
|---|
| 108 | Utils.copyFile(tmpFile, file);
|
|---|
| 109 | }
|
|---|
| 110 | } catch (IOException e2) {
|
|---|
| 111 | Main.error(e2);
|
|---|
| 112 | JOptionPane.showMessageDialog(
|
|---|
| 113 | Main.parent,
|
|---|
| 114 | tr("<html>An error occurred while restoring backup file.<br>Error is:<br>{0}</html>", e2.getMessage()),
|
|---|
| 115 | tr("Error"),
|
|---|
| 116 | JOptionPane.ERROR_MESSAGE
|
|---|
| 117 | );
|
|---|
| 118 | }
|
|---|
| 119 | }
|
|---|
| 120 | }
|
|---|
| 121 |
|
|---|
| 122 | protected void doSave(File file, OsmDataLayer layer) throws IOException {
|
|---|
| 123 | // create outputstream and wrap it with gzip or bzip, if necessary
|
|---|
| 124 | try (
|
|---|
| 125 | OutputStream out = getOutputStream(file);
|
|---|
| 126 | Writer writer = new OutputStreamWriter(out, StandardCharsets.UTF_8);
|
|---|
| 127 | OsmWriter w = OsmWriterFactory.createOsmWriter(new PrintWriter(writer), false, layer.data.getVersion())
|
|---|
| 128 | ) {
|
|---|
| 129 | layer.data.getReadLock().lock();
|
|---|
| 130 | try {
|
|---|
| 131 | w.writeLayer(layer);
|
|---|
| 132 | } finally {
|
|---|
| 133 | layer.data.getReadLock().unlock();
|
|---|
| 134 | }
|
|---|
| 135 | }
|
|---|
| 136 | }
|
|---|
| 137 | }
|
|---|
