001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.io.session; 003 004import static org.openstreetmap.josm.tools.I18n.tr; 005 006import java.io.IOException; 007import java.io.InputStream; 008 009import javax.xml.xpath.XPath; 010import javax.xml.xpath.XPathConstants; 011import javax.xml.xpath.XPathExpression; 012import javax.xml.xpath.XPathExpressionException; 013import javax.xml.xpath.XPathFactory; 014 015import org.openstreetmap.josm.gui.io.importexport.GpxImporter; 016import org.openstreetmap.josm.gui.io.importexport.NMEAImporter; 017import org.openstreetmap.josm.gui.io.importexport.RtkLibImporter; 018import org.openstreetmap.josm.gui.layer.GpxLayer; 019import org.openstreetmap.josm.gui.layer.Layer; 020import org.openstreetmap.josm.gui.progress.ProgressMonitor; 021import org.openstreetmap.josm.io.IllegalDataException; 022import org.openstreetmap.josm.tools.Utils; 023import org.w3c.dom.Element; 024 025/** 026 * Session exporter for {@link GpxLayer}. 027 * @since 5501 028 */ 029public class GpxTracksSessionImporter implements SessionLayerImporter { 030 031 @Override 032 public Layer load(Element elem, SessionReader.ImportSupport support, ProgressMonitor progressMonitor) 033 throws IOException, IllegalDataException { 034 String version = elem.getAttribute("version"); 035 if (!"0.1".equals(version)) { 036 throw new IllegalDataException(tr("Version ''{0}'' of meta data for gpx track layer is not supported. Expected: 0.1", version)); 037 } 038 try { 039 XPathFactory xPathFactory = XPathFactory.newInstance(); 040 XPath xpath = xPathFactory.newXPath(); 041 XPathExpression fileExp = xpath.compile("file/text()"); 042 String fileStr = (String) fileExp.evaluate(elem, XPathConstants.STRING); 043 if (Utils.isEmpty(fileStr)) { 044 throw new IllegalDataException(tr("File name expected for layer no. {0}", support.getLayerIndex())); 045 } 046 047 try (InputStream in = support.getInputStream(fileStr)) { 048 GpxImporter.GpxImporterData importData; 049 050 if (NMEAImporter.FILE_FILTER.acceptName(fileStr)) { 051 importData = NMEAImporter.loadLayers(in, support.getFile(fileStr), support.getLayerName()); 052 } else if (RtkLibImporter.FILE_FILTER.acceptName(fileStr)) { 053 importData = RtkLibImporter.loadLayers(in, support.getFile(fileStr), support.getLayerName()); 054 } else { 055 importData = GpxImporter.loadLayers(in, support.getFile(fileStr), support.getLayerName(), progressMonitor); 056 } 057 if (importData.getGpxLayer() != null && importData.getGpxLayer().data != null) { 058 importData.getGpxLayer().data.fromSession = true; 059 } 060 061 support.addPostLayersTask(importData.getPostLayerTask()); 062 return getLayer(importData); 063 } 064 065 } catch (XPathExpressionException e) { 066 throw new IllegalDataException(e); 067 } 068 } 069 070 protected Layer getLayer(GpxImporter.GpxImporterData importData) { 071 return importData.getGpxLayer(); 072 } 073}