Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/ModuleServiceImpl.java @ 5818:a4ff4167be1e

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Request feature info on all layers and show it as html if the server does not return valid gml. Non queryable layers produce an error message when the request fails. This is good enough
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 24 Apr 2013 17:33:27 +0200
parents fed914a42a10
children
rev   line source
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1 package de.intevation.flys.client.server;
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2
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3 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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4 import de.intevation.artifacts.common.utils.XMLUtils;
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5 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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6 import de.intevation.artifacts.httpclient.http.HttpClient;
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7 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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8 import de.intevation.flys.client.client.services.ModuleService;
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9 import de.intevation.flys.client.server.auth.User;
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10 import de.intevation.flys.client.shared.exceptions.ServerException;
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11 import de.intevation.flys.client.shared.model.DefaultModule;
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12 import de.intevation.flys.client.shared.model.Module;
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13
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14 import java.util.ArrayList;
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15 import java.util.List;
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16
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17 import javax.xml.xpath.XPathConstants;
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18
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19 import org.apache.log4j.Logger;
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20 import org.w3c.dom.Document;
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21 import org.w3c.dom.Element;
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22 import org.w3c.dom.NodeList;
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23
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24 public class ModuleServiceImpl
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25 extends RemoteServiceServlet
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26 implements ModuleService
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27 {
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28 private static final Logger logger =
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29 Logger.getLogger(ModuleServiceImpl.class);
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30
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31 public static final String XPATH_MODULES = "/art:modules/art:module";
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32
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33 public static final String ERROR_NO_MODULES_FOUND =
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34 "error_no_module_found";
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35
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36 @Override
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37 public Module[] list(String locale) throws ServerException {
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38 User user = this.getUser();
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39
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40 logger.info("ModuleService.list");
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41
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42 String url = getServletContext().getInitParameter("server-url");
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43
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44 // create dummy xml
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45 Document doc = XMLUtils.newDocument();
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46
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47 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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48 doc,
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49 ArtifactNamespaceContext.NAMESPACE_URI,
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50 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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51
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52 Element dummy = ec.create("modules");
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53 doc.appendChild(dummy);
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54
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55 HttpClient client = new HttpClientImpl(url, locale);
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56 try {
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57 Document result = client.callService(url, "modules", doc);
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58
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59 NodeList list = (NodeList) XMLUtils.xpath(
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60 result,
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61 XPATH_MODULES,
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62 XPathConstants.NODESET,
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63 ArtifactNamespaceContext.INSTANCE);
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64
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65 if (list == null) {
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66 logger.warn("No modules found.");
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67
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68 throw new ServerException(ERROR_NO_MODULES_FOUND);
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69 }
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70
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71 int num = list.getLength();
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72
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73 List<Module> modules = new ArrayList<Module>(list.getLength());
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74 for(int i =0; i < num; i++) {
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75 Element em = (Element)list.item(i);
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76 String name = em.getAttributeNS(
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77 ArtifactNamespaceContext.NAMESPACE_URI, "name");
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78 String localname = em.getAttributeNS(
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79 ArtifactNamespaceContext.NAMESPACE_URI, "localname");
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80 String strselected = em.getAttributeNS(
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81 ArtifactNamespaceContext.NAMESPACE_URI, "selected");
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82 boolean selected = strselected == null ? false :
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83 strselected.equalsIgnoreCase("true");
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84 logger.debug("Found module " + name + " " + localname);
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85 if (user == null || user.canUseFeature("module:" + name)) {
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86 modules.add(new DefaultModule(name, localname, selected));
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87 }
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88 }
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89 return modules.toArray(new Module[modules.size()]);
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90 }
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91 catch (ConnectionException ce) {
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92 logger.error(ce, ce);
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93 }
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94
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95 throw new ServerException(ERROR_NO_MODULES_FOUND);
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96 }
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97 }
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98
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99 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 tw=80 :
http://dive4elements.wald.intevation.org