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.util.HashMap;
008import java.util.Map;
009
010import org.w3c.dom.Element;
011import org.w3c.dom.Node;
012import org.w3c.dom.NodeList;
013
014import org.openstreetmap.josm.data.Preferences;
015import org.openstreetmap.josm.data.imagery.ImageryInfo;
016import org.openstreetmap.josm.data.imagery.ImageryInfo.ImageryPreferenceEntry;
017import org.openstreetmap.josm.gui.layer.ImageryLayer;
018import org.openstreetmap.josm.gui.layer.Layer;
019import org.openstreetmap.josm.gui.progress.ProgressMonitor;
020import org.openstreetmap.josm.io.IllegalDataException;
021import org.openstreetmap.josm.io.session.SessionReader.ImportSupport;
022
023/**
024 * Session importer for both TMSLayer and WMSLayer.
025 */
026public class ImagerySessionImporter implements SessionLayerImporter {
027
028    @Override
029    public Layer load(Element elem, ImportSupport support, ProgressMonitor progressMonitor) throws IOException, IllegalDataException {
030        String version = elem.getAttribute("version");
031        if (!"0.1".equals(version)) {
032            throw new IllegalDataException(tr("Version ''{0}'' of meta data for imagery layer is not supported. Expected: 0.1", version));
033        }
034        Map<String, String> attributes = new HashMap<String, String>();
035
036        NodeList nodes = elem.getChildNodes();
037
038        for (int i=0; i<nodes.getLength(); ++i) {
039            Node node = nodes.item(i);
040            if (node.getNodeType() == Node.ELEMENT_NODE) {
041                Element e = (Element) node;
042                attributes.put(e.getTagName(), e.getTextContent());
043            }
044        }
045        ImageryPreferenceEntry prefEntry = Preferences.deserializeStruct(attributes, ImageryPreferenceEntry.class);
046        ImageryInfo i = new ImageryInfo(prefEntry);
047        final ImageryLayer layer = ImageryLayer.create(i);
048        return layer;
049    }
050
051}