sascha@262: package de.intevation.flys.client.server;
sascha@262: 
sascha@262: import java.util.List;
sascha@276: import java.util.ArrayList;
sascha@276: 
sascha@276: import org.w3c.dom.Document;
sascha@276: import org.w3c.dom.Element;
sascha@276: import org.w3c.dom.Node;
sascha@276: import org.w3c.dom.NodeList;
sascha@262: 
sascha@262: import com.google.gwt.user.server.rpc.RemoteServiceServlet;
sascha@262: 
sascha@276: import de.intevation.artifacts.common.ArtifactNamespaceContext;
sascha@276: 
sascha@276: import de.intevation.artifacts.common.utils.XMLUtils;
sascha@276: 
sascha@262: import de.intevation.flys.client.shared.exceptions.ServerException;
sascha@262: 
sascha@262: import de.intevation.flys.client.client.services.MetaDataService;
sascha@262: 
sascha@276: import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
sascha@276: 
sascha@276: import de.intevation.artifacts.httpclient.http.HttpClient;
sascha@276: import de.intevation.artifacts.httpclient.http.HttpClientImpl;
sascha@276: 
sascha@278: import de.intevation.flys.client.shared.model.DataCageTree;
sascha@278: import de.intevation.flys.client.shared.model.DataCageNode;
sascha@278: 
sascha@262: public class MetaDataServiceImpl
sascha@262: extends      RemoteServiceServlet
sascha@262: implements   MetaDataService
sascha@262: {
sascha@276:     public static final String ERROR_NO_META_DATA_FOUND =
sascha@276:         "error_no_meta_data_found";
sascha@276: 
sascha@278:     public DataCageTree getMetaData(String url, String locale, String river) 
sascha@262:     throws ServerException
sascha@262:     {
sascha@276:         System.out.println("MetaDataService.getDistanceInfo");
sascha@276: 
sascha@276:         Document doc = XMLUtils.newDocument();
sascha@276: 
sascha@276:         XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
sascha@276:             doc,
sascha@276:             ArtifactNamespaceContext.NAMESPACE_URI,
sascha@276:             ArtifactNamespaceContext.NAMESPACE_PREFIX);
sascha@276: 
sascha@276:         Element riverEl = ec.create("river");
sascha@276: 
sascha@276:         riverEl.setTextContent(river);
sascha@276: 
sascha@276:         doc.appendChild(riverEl);
sascha@276: 
sascha@276:         HttpClient client = new HttpClientImpl(url, locale);
sascha@276: 
sascha@276:         try {
sascha@278:             return convert(client.callService(url, "metadata", doc));
sascha@276:         }
sascha@276:         catch (ConnectionException ce) {
sascha@276:             System.err.println(ce.getLocalizedMessage());
sascha@276:         }
sascha@276: 
sascha@276:         throw new ServerException(ERROR_NO_META_DATA_FOUND);
sascha@262:     }
sascha@278: 
sascha@278:     protected static DataCageNode convert(Node node) {
sascha@278:         String name = node.getLocalName();
sascha@278:         DataCageNode dvn = new DataCageNode(name);
sascha@278:         NodeList children = node.getChildNodes();
sascha@278:         for (int i = 0, N = children.getLength(); i < N; ++i) {
sascha@278:             dvn.addChild(convert(children.item(i)));
sascha@278:         }
sascha@278:         return dvn;
sascha@278:     }
sascha@278: 
sascha@278:     protected static DataCageTree convert(Document document) {
sascha@278:         ArrayList<DataCageNode> roots = new ArrayList<DataCageNode>();
sascha@278:         NodeList nodes = document.getChildNodes();
sascha@278:         for (int i = 0, N = nodes.getLength(); i < N; ++i) {
sascha@278:             Node node = nodes.item(i);
sascha@278:             if (node.getNodeType() == Node.ELEMENT_NODE) {
sascha@278:                 roots.add(convert(nodes.item(i)));
sascha@278:             }
sascha@278:         }
sascha@278:         return new DataCageTree(roots.get(0));
sascha@278:     }
sascha@262: }
sascha@262: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :