// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.io.session;
import static org.openstreetmap.josm.tools.I18n.tr;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.openstreetmap.josm.gui.layer.Layer;
import org.openstreetmap.josm.gui.progress.ProgressMonitor;
import org.openstreetmap.josm.io.IllegalDataException;
import org.openstreetmap.josm.io.OsmImporter;
import org.openstreetmap.josm.io.session.SessionReader.ImportSupport;
import org.w3c.dom.Element;
public class OsmDataSessionImporter implements SessionLayerImporter {
@Override
public Layer load(Element elem, ImportSupport support, ProgressMonitor progressMonitor) throws IOException, IllegalDataException {
String version = elem.getAttribute("version");
if (!"0.1".equals(version)) {
throw new IllegalDataException(tr("Version ''{0}'' of meta data for osm data layer is not supported. Expected: 0.1", version));
}
try {
XPathFactory xPathFactory = XPathFactory.newInstance();
XPath xpath = xPathFactory.newXPath();
XPathExpression fileExp = xpath.compile("file/text()");
String fileStr = (String) fileExp.evaluate(elem, XPathConstants.STRING);
if (fileStr == null || fileStr.isEmpty()) {
throw new IllegalDataException(tr("File name expected for layer no. {0}", support.getLayerIndex()));
}
OsmImporter importer = new OsmImporter();
try (InputStream in = support.getInputStream(fileStr)) {
OsmImporter.OsmImporterData importData = importer.loadLayer(in, support.getFile(fileStr), support.getLayerName(), progressMonitor);
support.addPostLayersTask(importData.getPostLayerTask());
return importData.getLayer();
}
} catch (XPathExpressionException e) {
throw new IllegalDataException(e);
}
}
}