teichmann@5861: /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
teichmann@5861:  * Software engineering by Intevation GmbH
teichmann@5861:  *
teichmann@5993:  * This file is Free Software under the GNU AGPL (>=v3)
teichmann@5861:  * and comes with ABSOLUTELY NO WARRANTY! Check out the
teichmann@5993:  * documentation coming with Dive4Elements River for details.
teichmann@5861:  */
teichmann@5861: 
teichmann@5835: package org.dive4elements.river.client.server;
bjoern@3515: 
teichmann@5835: import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
teichmann@5835: import org.dive4elements.artifacts.common.utils.XMLUtils;
teichmann@5835: import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
teichmann@5835: import org.dive4elements.artifacts.httpclient.http.HttpClient;
teichmann@5835: import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
teichmann@5835: import org.dive4elements.river.client.client.services.ModuleService;
teichmann@5835: import org.dive4elements.river.client.server.auth.User;
teichmann@5835: import org.dive4elements.river.client.shared.exceptions.ServerException;
teichmann@5835: import org.dive4elements.river.client.shared.model.DefaultModule;
teichmann@5835: import org.dive4elements.river.client.shared.model.Module;
christian@3540: 
bjoern@3515: import java.util.ArrayList;
bjoern@3515: import java.util.List;
bjoern@3515: 
bjoern@3529: import javax.xml.xpath.XPathConstants;
bjoern@3529: 
bjoern@3515: import org.apache.log4j.Logger;
bjoern@3529: import org.w3c.dom.Document;
bjoern@3529: import org.w3c.dom.Element;
bjoern@3529: import org.w3c.dom.NodeList;
bjoern@3529: 
bjoern@3515: public class ModuleServiceImpl
bjoern@3515: extends      RemoteServiceServlet
bjoern@3515: implements   ModuleService
bjoern@3515: {
teichmann@8203:     private static final Logger log =
bjoern@3515:         Logger.getLogger(ModuleServiceImpl.class);
bjoern@3515: 
bjoern@3529:     public static final String XPATH_MODULES = "/art:modules/art:module";
bjoern@3515: 
bjoern@3529:     public static final String ERROR_NO_MODULES_FOUND =
bjoern@3529:         "error_no_module_found";
bjoern@3515: 
bjoern@3515:     @Override
gernotbelger@8870:     public Module[] list(final String locale) throws ServerException {
gernotbelger@8870:         final User user = this.getUser();
bjoern@3515: 
teichmann@8203:         log.info("ModuleService.list");
bjoern@3515: 
gernotbelger@8870:         final String url = getServletContext().getInitParameter("server-url");
bjoern@3529: 
bjoern@3529:         // create dummy xml
gernotbelger@8870:         final Document doc = XMLUtils.newDocument();
bjoern@3529: 
gernotbelger@8870:         final XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
bjoern@3529:             doc,
bjoern@3529:             ArtifactNamespaceContext.NAMESPACE_URI,
bjoern@3529:             ArtifactNamespaceContext.NAMESPACE_PREFIX);
bjoern@3529: 
gernotbelger@8870:         final Element dummy = ec.create("modules");
bjoern@3529:         doc.appendChild(dummy);
bjoern@3529: 
gernotbelger@8870:         final HttpClient client = new HttpClientImpl(url, locale);
bjoern@3529:         try {
gernotbelger@8870:             final Document result = client.callService(url, "modules", doc);
bjoern@3529: 
gernotbelger@8870:             final NodeList list = (NodeList) XMLUtils.xpath(
bjoern@3529:                 result,
bjoern@3529:                 XPATH_MODULES,
bjoern@3529:                 XPathConstants.NODESET,
bjoern@3529:                 ArtifactNamespaceContext.INSTANCE);
bjoern@3529: 
bjoern@3529:             if (list == null) {
teichmann@8203:                 log.warn("No modules found.");
bjoern@3529: 
bjoern@3529:                 throw new ServerException(ERROR_NO_MODULES_FOUND);
bjoern@3515:             }
bjoern@3529: 
gernotbelger@8870:             final int num = list.getLength();
bjoern@3529: 
gernotbelger@8870:             final List<Module> modules = new ArrayList<Module>(list.getLength());
bjoern@3529:             for(int i =0; i < num; i++) {
gernotbelger@8870:                 final Element em = (Element)list.item(i);
gernotbelger@8870:                 final String name = em.getAttributeNS(ArtifactNamespaceContext.NAMESPACE_URI, "name");
gernotbelger@8870:                 final String localname = em.getAttributeNS(ArtifactNamespaceContext.NAMESPACE_URI, "localname");
gernotbelger@8870:                 final String strselected = em.getAttributeNS(ArtifactNamespaceContext.NAMESPACE_URI, "selected");
gernotbelger@8870:                 boolean selected = Boolean.parseBoolean(strselected); 
gernotbelger@8870:                 final String group = em.getAttributeNS(ArtifactNamespaceContext.NAMESPACE_URI, "groupId");
gernotbelger@8870:                 final String groupLabel = em.getAttributeNS(ArtifactNamespaceContext.NAMESPACE_URI, "groupLabel");
gernotbelger@8870: 
gernotbelger@8870:                 final NodeList rivers = em.getChildNodes();
gernotbelger@8870:                 final List<String> riverUuids = new ArrayList<String>(rivers.getLength());
rrenkert@7761:                 for (int j = 0; j < rivers.getLength(); j++) {
gernotbelger@8870:                     final Element re = (Element)rivers.item(j);
rrenkert@7761:                     riverUuids.add(re.getAttribute("uuid"));
rrenkert@7761:                 }
teichmann@8203:                 log.debug("Found module " + name + " " + localname);
bjoern@3529:                 if (user == null || user.canUseFeature("module:" + name)) {
gernotbelger@8870:                     modules.add(new DefaultModule(name, localname, selected, group, groupLabel, riverUuids));
bjoern@3529:                 }
bjoern@3529:             }
bjoern@3529:             return modules.toArray(new Module[modules.size()]);
bjoern@3515:         }
bjoern@3529:         catch (ConnectionException ce) {
teichmann@8203:             log.error(ce, ce);
bjoern@3529:         }
bjoern@3529: 
bjoern@3529:         throw new ServerException(ERROR_NO_MODULES_FOUND);
bjoern@3515:     }
bjoern@3515: }
bjoern@3515: 
bjoern@3515: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 tw=80 :