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.layer.Layer; 016import org.openstreetmap.josm.gui.layer.NoteLayer; 017import org.openstreetmap.josm.gui.progress.ProgressMonitor; 018import org.openstreetmap.josm.io.IllegalDataException; 019import org.openstreetmap.josm.io.NoteImporter; 020import org.openstreetmap.josm.io.session.SessionReader.ImportSupport; 021import org.w3c.dom.Element; 022import org.xml.sax.SAXException; 023 024/** 025 * Session importer for {@link NoteLayer}. 026 * @since 9746 027 */ 028public class NoteSessionImporter implements SessionLayerImporter { 029 030 @Override 031 public Layer load(Element elem, ImportSupport support, ProgressMonitor progressMonitor) throws IOException, IllegalDataException { 032 String version = elem.getAttribute("version"); 033 if (!"0.1".equals(version)) { 034 throw new IllegalDataException(tr("Version ''{0}'' of meta data for note layer is not supported. Expected: 0.1", version)); 035 } 036 try { 037 XPathFactory xPathFactory = XPathFactory.newInstance(); 038 XPath xpath = xPathFactory.newXPath(); 039 XPathExpression fileExp = xpath.compile("file/text()"); 040 String fileStr = (String) fileExp.evaluate(elem, XPathConstants.STRING); 041 if (fileStr == null || fileStr.isEmpty()) { 042 throw new IllegalDataException(tr("File name expected for layer no. {0}", support.getLayerIndex())); 043 } 044 045 NoteImporter importer = new NoteImporter(); 046 try (InputStream in = support.getInputStream(fileStr)) { 047 return importer.loadLayer(in, support.getFile(fileStr), support.getLayerName(), progressMonitor); 048 } 049 } catch (XPathExpressionException | SAXException e) { 050 throw new IllegalDataException(e); 051 } 052 } 053}