Mercurial > dive4elements > river

comparison gwt-client/src/main/java/org/dive4elements/river/client/server/MapInfoServiceImpl.java @ 5838:5aa05a7a34b7

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Rename modules to more fitting names.
author Sascha L. Teichmann <teichmann@intevation.de>
date Thu, 25 Apr 2013 15:23:37 +0200
parents flys-client/src/main/java/org/dive4elements/river/client/server/MapInfoServiceImpl.java@821a02bbfb4e
children 172338b1407f
comparison
equal deleted inserted replaced
5837:d9901a08d0a6 5838:5aa05a7a34b7
1 package org.dive4elements.river.client.server;
2
3 import com.google.gwt.core.client.GWT;
4 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
5
6 import org.dive4elements.artifacts.common.utils.XMLUtils;
7 import org.dive4elements.artifacts.common.utils.XMLUtils.ElementCreator;
8 import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException;
9 import org.dive4elements.artifacts.httpclient.http.HttpClient;
10 import org.dive4elements.artifacts.httpclient.http.HttpClientImpl;
11 import org.dive4elements.river.client.client.services.MapInfoService;
12 import org.dive4elements.river.client.shared.exceptions.ServerException;
13 import org.dive4elements.river.client.shared.model.BBox;
14 import org.dive4elements.river.client.shared.model.MapInfo;
15
16 import org.apache.log4j.Logger;
17 import org.w3c.dom.Document;
18 import org.w3c.dom.Element;
19
20
21 /**
22 * This service fetches a document that contains meta information for a specific
23 * chart.
24 *
25 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
26 */
27 public class MapInfoServiceImpl
28 extends RemoteServiceServlet
29 implements MapInfoService
30 {
31 private static final Logger logger =
32 Logger.getLogger(MapInfoServiceImpl.class);
33
34
35 public static final String XPATH_RIVER =
36 "/mapinfo/river/@name";
37
38 public static final String XPATH_SRID =
39 "/mapinfo/river/srid/@value";
40
41 public static final String XPATH_BBOX =
42 "/mapinfo/river/bbox/@value";
43
44 public static final String XPATH_RIVER_WMS =
45 "/mapinfo/river/river-wms/@url";
46
47 public static final String XPATH_RIVER_LAYERS =
48 "/mapinfo/river/river-wms/@layers";
49
50 public static final String XPATH_WMS_URL =
51 "/mapinfo/river/background-wms/@url";
52
53 public static final String XPATH_WMS_LAYERS =
54 "/mapinfo/river/background-wms/@layers";
55
56 public static final String ERROR_NO_MAPINFO_FOUND =
57 "mapinfo_service_no_result";
58
59
60 @Override
61 public MapInfo getMapInfo(String locale, String river)
62 throws ServerException
63 {
64 logger.info("MapInfoServiceImpl.getMapInfo");
65
66 String url = getServletContext().getInitParameter("server-url");
67
68 Document request = getRequestDocument(river, "rivermap");
69
70 HttpClient client = new HttpClientImpl(url, locale);
71
72 try {
73 logger.debug("MapInfoServiceImpl.callService");
74 Document result = client.callService(url, "mapinfo", request);
75
76 if (result == null) {
77 logger.warn("MapInfo service returned no result.");
78 throw new ServerException(ERROR_NO_MAPINFO_FOUND);
79 }
80
81 return getMapInfo(result);
82 }
83 catch (ConnectionException ce) {
84 logger.error(ce, ce);
85 }
86
87 throw new ServerException(ERROR_NO_MAPINFO_FOUND);
88 }
89
90
91 public static Document getRequestDocument(String rivername, String maptypeStr) {
92 logger.debug("MapInfoServiceImpl.getRequestDocument");
93
94 Document request = XMLUtils.newDocument();
95 ElementCreator cr = new ElementCreator(request, null, null);
96
97 Element root = cr.create("mapinfo");
98 Element river = cr.create("river");
99 Element maptype = cr.create("maptype");
100
101 river.setTextContent(rivername);
102 maptype.setTextContent(maptypeStr);
103
104 request.appendChild(root);
105 root.appendChild(river);
106 root.appendChild(maptype);
107
108 return request;
109 }
110
111
112 public static MapInfo getMapInfo(Document result) {
113 logger.debug("MapInfoServiceImpl.getMapInfo");
114
115 String river = XMLUtils.xpathString(result, XPATH_RIVER, null);
116 String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null);
117 String bboxS = XMLUtils.xpathString(result, XPATH_BBOX, null);
118 BBox bbox = BBox.getBBoxFromString(bboxS);
119
120 String riverWMS = XMLUtils.xpathString(result, XPATH_RIVER_WMS, null);
121 String riverLayers = XMLUtils.xpathString(result, XPATH_RIVER_LAYERS, null);
122 String wmsURL = XMLUtils.xpathString(result, XPATH_WMS_URL, null);
123 String wmsLayers = XMLUtils.xpathString(result, XPATH_WMS_LAYERS, null);
124
125 int srid = 4326;
126
127 try {
128 srid = Integer.parseInt(sridStr);
129 }
130 catch (NumberFormatException nfe) {
131 GWT.log("Could not parse SRID String: " + sridStr);
132 }
133
134 return new MapInfo(
135 river, srid, bbox, riverWMS, riverLayers, wmsURL, wmsLayers);
136 }
137 }
138 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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