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.w3c.dom.Element; 023 024/** 025 * Session exporter for {@link GpxLayer}. 026 * @since 5501 027 */ 028public class GpxTracksSessionImporter implements SessionLayerImporter { 029 030 @Override 031 public Layer load(Element elem, SessionReader.ImportSupport support, ProgressMonitor progressMonitor) 032 throws IOException, IllegalDataException { 033 String version = elem.getAttribute("version"); 034 if (!"0.1".equals(version)) { 035 throw new IllegalDataException(tr("Version ''{0}'' of meta data for gpx track layer is not supported. Expected: 0.1", version)); 036 } 037 try { 038 XPathFactory xPathFactory = XPathFactory.newInstance(); 039 XPath xpath = xPathFactory.newXPath(); 040 XPathExpression fileExp = xpath.compile("file/text()"); 041 String fileStr = (String) fileExp.evaluate(elem, XPathConstants.STRING); 042 if (fileStr == null || fileStr.isEmpty()) { 043 throw new IllegalDataException(tr("File name expected for layer no. {0}", support.getLayerIndex())); 044 } 045 046 try (InputStream in = support.getInputStream(fileStr)) { 047 GpxImporter.GpxImporterData importData; 048 049 if (NMEAImporter.FILE_FILTER.acceptName(fileStr)) { 050 importData = NMEAImporter.loadLayers(in, support.getFile(fileStr), support.getLayerName(), null); 051 } else if (RtkLibImporter.FILE_FILTER.acceptName(fileStr)) { 052 importData = RtkLibImporter.loadLayers(in, support.getFile(fileStr), support.getLayerName(), null); 053 } else { 054 importData = GpxImporter.loadLayers(in, support.getFile(fileStr), support.getLayerName(), null, progressMonitor); 055 } 056 057 support.addPostLayersTask(importData.getPostLayerTask()); 058 return importData.getGpxLayer(); 059 } 060 061 } catch (XPathExpressionException e) { 062 throw new IllegalDataException(e); 063 } 064 } 065}