| 1 | // License: GPL. For details, see LICENSE file.
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| 2 | package org.openstreetmap.josm.io.session;
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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.IOException;
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| 7 | import java.io.InputStream;
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| 8 | import java.util.List;
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| 9 |
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| 10 | import javax.xml.xpath.XPath;
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| 11 | import javax.xml.xpath.XPathConstants;
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| 12 | import javax.xml.xpath.XPathExpression;
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| 13 | import javax.xml.xpath.XPathExpressionException;
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| 14 | import javax.xml.xpath.XPathFactory;
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| 15 |
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| 16 | import org.openstreetmap.josm.gui.layer.GpxLayer;
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| 17 | import org.openstreetmap.josm.gui.layer.Layer;
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| 18 | import org.openstreetmap.josm.gui.layer.markerlayer.MarkerLayer;
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| 19 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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| 20 | import org.openstreetmap.josm.io.GpxImporter;
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| 21 | import org.openstreetmap.josm.io.IllegalDataException;
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| 22 | import org.openstreetmap.josm.io.session.SessionReader.ImportSupport;
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| 23 | import org.w3c.dom.Element;
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| 24 |
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| 25 | /**
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| 26 | * Session importer for {@link MarkerLayer}.
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| 27 | * @since 5684
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| 28 | */
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| 29 | public class MarkerSessionImporter implements SessionLayerImporter {
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| 30 |
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| 31 | @Override
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| 32 | public Layer load(Element elem, ImportSupport support, ProgressMonitor progressMonitor) throws IOException, IllegalDataException {
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| 33 | String version = elem.getAttribute("version");
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| 34 | if (!"0.1".equals(version)) {
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| 35 | throw new IllegalDataException(tr("Version ''{0}'' of meta data for marker layer is not supported. Expected: 0.1", version));
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| 36 | }
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| 37 | try {
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| 38 | XPathFactory xPathFactory = XPathFactory.newInstance();
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| 39 | XPath xpath = xPathFactory.newXPath();
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| 40 | XPathExpression fileExp = xpath.compile("file/text()");
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| 41 | String fileStr = (String) fileExp.evaluate(elem, XPathConstants.STRING);
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| 42 | if (fileStr == null || fileStr.isEmpty()) {
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| 43 | throw new IllegalDataException(tr("File name expected for layer no. {0}", support.getLayerIndex()));
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| 44 | }
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| 45 |
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| 46 | try (InputStream in = support.getInputStream(fileStr)) {
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| 47 | GpxImporter.GpxImporterData importData = GpxImporter.loadLayers(in, support.getFile(fileStr), support.getLayerName(),
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| 48 | null, progressMonitor);
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| 49 |
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| 50 | support.addPostLayersTask(importData.getPostLayerTask());
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| 51 |
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| 52 | GpxLayer gpxLayer = null;
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| 53 | List<SessionReader.LayerDependency> deps = support.getLayerDependencies();
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| 54 | if (!deps.isEmpty()) {
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| 55 | Layer layer = deps.get(0).getLayer();
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| 56 | if (layer instanceof GpxLayer) {
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| 57 | gpxLayer = (GpxLayer) layer;
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| 58 | }
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| 59 | }
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| 60 |
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| 61 | MarkerLayer markerLayer = importData.getMarkerLayer();
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| 62 | if (markerLayer != null) {
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| 63 | markerLayer.fromLayer = gpxLayer;
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| 64 | }
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| 65 |
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| 66 | return markerLayer;
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| 67 | }
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| 68 | } catch (XPathExpressionException e) {
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| 69 | throw new IllegalDataException(e);
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| 70 | }
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| 71 | }
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| 72 | }
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