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