Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/ModuleServiceImpl.java @ 4697:52068f1231da

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Fixed NPE in empty style editor window.
author Raimund Renkert <rrenkert@intevation.de>
date Mon, 17 Dec 2012 17:54:26 +0100
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