source: osm/applications/editors/josm/plugins/cadastre-fr/src/cadastre_fr/CadastreInterface.java@ 27034

Last change on this file since 27034 was 27034, checked in by pieren, 13 years ago

fixing "Feuille list" parsing for communes with several "Tableau d'assemblage"
  • Property svn:eol-style set to native
File size: 25.9 KB
Line 
1// License: GPL. v2 and later. Copyright 2008-2009 by Pieren <pieren3@gmail.com> and others
2package cadastre_fr;
3
4import static org.openstreetmap.josm.tools.I18n.tr;
5
6import java.awt.GridBagLayout;
7import java.io.BufferedReader;
8import java.io.IOException;
9import java.io.InputStreamReader;
10import java.io.OutputStream;
11import java.net.HttpURLConnection;
12import java.net.MalformedURLException;
13import java.net.URL;
14import java.util.Date;
15import java.util.Vector;
16
17import javax.swing.JComboBox;
18import javax.swing.JDialog;
19import javax.swing.JOptionPane;
20import javax.swing.JPanel;
21
22import org.openstreetmap.josm.Main;
23import org.openstreetmap.josm.data.coor.EastNorth;
24import org.openstreetmap.josm.gui.layer.Layer;
25import org.openstreetmap.josm.tools.GBC;
26
27public class CadastreInterface {
28 public boolean downloadCanceled = false;
29 public HttpURLConnection urlConn = null;
30
31 private String cookie;
32 private String interfaceRef = null;
33 private String lastWMSLayerName = null;
34 private URL searchFormURL;
35 private Vector<String> listOfCommunes = new Vector<String>();
36 private Vector<String> listOfTA = new Vector<String>();
37 class PlanImage {
38 String name;
39 String ref;
40 PlanImage(String name, String ref) {
41 this.name = name;
42 this.ref = ref;
43 }
44 }
45 private Vector<PlanImage> listOfFeuilles = new Vector<PlanImage>();
46 private long cookieTimestamp;
47
48 final String baseURL = "http://www.cadastre.gouv.fr";
49 final String cImageFormat = "Cette commune est au format ";
50 final String cCommuneListStart = "<select name=\"codeCommune\"";
51 final String cCommuneListEnd = "</select>";
52 final String c0ptionListStart = "<option value=\"";
53 final String cOptionListEnd = "</option>";
54 final String cBBoxCommunStart = "new GeoBox(";
55 final String cBBoxCommunEnd = ")";
56
57 final String cInterfaceVector = "afficherCarteCommune.do";
58 final String cInterfaceRasterTA = "afficherCarteTa.do";
59 final String cInterfaceRasterFeuille = "afficherCarteFeuille.do";
60 final String cImageLinkStart = "<a href=\"#\" class=\"raster\" onClick=\"popup('afficherCarteFeuille.do?f=";
61 final String cTAImageLinkStart = "<a href=\"#\" class=\"raster\" onClick=\"popup('afficherCarteTa.do?f=";
62 final String cImageNameStart = ">Feuille ";
63 final String cTAImageNameStart = "Tableau d'assemblage <strong>";
64
65 final static long cCookieExpiration = 30 * 60 * 1000; // 30 minutes expressed in milliseconds
66
67 final int cRetriesGetCookie = 10; // 10 times every 3 seconds means 30 seconds trying to get a cookie
68
69 public boolean retrieveInterface(WMSLayer wmsLayer) throws DuplicateLayerException, WMSException {
70 if (wmsLayer.getName().equals(""))
71 return false;
72 boolean isCookieExpired = isCookieExpired();
73 if (wmsLayer.getName().equals(lastWMSLayerName) && !isCookieExpired)
74 return true;
75 if (!wmsLayer.getName().equals(lastWMSLayerName))
76 interfaceRef = null;
77 // open the session with the French Cadastre web front end
78 downloadCanceled = false;
79 try {
80 if (cookie == null || isCookieExpired) {
81 getCookie();
82 interfaceRef = null;
83 }
84 if (cookie == null)
85 throw new WMSException(tr("Cannot open a new client session.\nServer in maintenance or temporary overloaded."));
86 if (interfaceRef == null) {
87 getInterface(wmsLayer);
88 this.lastWMSLayerName = wmsLayer.getName();
89 }
90 openInterface();
91 } catch (IOException e) {
92 JOptionPane.showMessageDialog(Main.parent,
93 tr("Town/city {0} not found or not available\n" +
94 "or action canceled", wmsLayer.getLocation()));
95 return false;
96 }
97 return true;
98 }
99
100 /**
101 *
102 * @return true if a cookie is delivered by WMS and false is WMS is not opening a client session
103 * (too many clients or in maintenance)
104 * @throws IOException
105 */
106 private void getCookie() throws IOException {
107 boolean cookied = false;
108 int retries = cRetriesGetCookie;
109 try {
110 searchFormURL = new URL(baseURL + "/scpc/accueil.do");
111 while (cookied == false && retries > 0) {
112 urlConn = (HttpURLConnection)searchFormURL.openConnection();
113 urlConn.setRequestMethod("GET");
114 urlConn.connect();
115 if (urlConn.getResponseCode() == HttpURLConnection.HTTP_OK) {
116 System.out.println("GET "+searchFormURL);
117 BufferedReader in = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
118 while(in.readLine() != null) {} // read the buffer otherwise we sent POST too early
119 String headerName=null;
120 for (int i=1; (headerName = urlConn.getHeaderFieldKey(i))!=null; i++) {
121 if (headerName.equals("Set-Cookie")) {
122 cookie = urlConn.getHeaderField(i);
123 cookie = cookie.substring(0, cookie.indexOf(";"));
124 cookieTimestamp = new Date().getTime();
125 System.out.println("received cookie=" + cookie + " at " + new Date(cookieTimestamp));
126 cookied = true;
127 }
128 }
129 } else {
130 System.out.println("Request to home page failed. Http error:"+urlConn.getResponseCode()+". Try again "+retries+" times");
131 CadastrePlugin.safeSleep(3000);
132 retries --;
133 }
134 }
135 } catch (MalformedURLException e) {
136 throw (IOException) new IOException(
137 "Illegal url.").initCause(e);
138 }
139 }
140
141 public void resetCookie() {
142 lastWMSLayerName = null;
143 cookie = null;
144 }
145
146 public boolean isCookieExpired() {
147 long now = new Date().getTime();
148 if ((now - cookieTimestamp) > cCookieExpiration) {
149 System.out.println("cookie received at "+new Date(cookieTimestamp)+" expired (now is "+new Date(now)+")");
150 return true;
151 }
152 return false;
153 }
154
155 public void resetInterfaceRefIfNewLayer(String newWMSLayerName) {
156 if (!newWMSLayerName.equals(lastWMSLayerName)) {
157 interfaceRef = null;
158 cookie = null; // new since WMS server requires that we come back to the main form
159 }
160 }
161
162 public void setCookie() {
163 this.urlConn.setRequestProperty("Cookie", this.cookie);
164 }
165
166 public void setCookie(HttpURLConnection urlConn) {
167 urlConn.setRequestProperty("Cookie", this.cookie);
168 }
169
170 private void getInterface(WMSLayer wmsLayer) throws IOException, DuplicateLayerException {
171 // first attempt : search for given name without codeCommune
172 interfaceRef = postForm(wmsLayer, "");
173 // second attempt either from known codeCommune (e.g. from cache) or from ComboBox
174 if (interfaceRef == null) {
175 if (!wmsLayer.getCodeCommune().equals("")) {
176 // codeCommune is already known (from previous request or from cache on disk)
177 interfaceRef = postForm(wmsLayer, wmsLayer.getCodeCommune());
178 } else {
179 if (listOfCommunes.size() > 1) {
180 // commune unknown, prompt the list of communes from
181 // server and try with codeCommune
182 String selected = selectMunicipalityDialog(wmsLayer);
183 if (selected != null) {
184 String newCodeCommune = selected.substring(1, selected.indexOf(">")-2);
185 String newLocation = selected.substring(selected.indexOf(">")+1, selected.lastIndexOf(" - "));
186 wmsLayer.setCodeCommune(newCodeCommune);
187 wmsLayer.setLocation(newLocation);
188 Main.pref.put("cadastrewms.codeCommune", newCodeCommune);
189 Main.pref.put("cadastrewms.location", newLocation);
190 }
191 checkLayerDuplicates(wmsLayer);
192 interfaceRef = postForm(wmsLayer, wmsLayer.getCodeCommune());
193 }
194 if (listOfCommunes.size() == 1 && wmsLayer.isRaster()) {
195 // commune known but raster format. Select "Feuille" (non-georeferenced image) from list.
196 int res = selectFeuilleDialog();
197 if (res != -1) {
198 wmsLayer.setCodeCommune(listOfFeuilles.elementAt(res).name);
199 checkLayerDuplicates(wmsLayer);
200 interfaceRef = buildRasterFeuilleInterfaceRef(wmsLayer.getCodeCommune());
201 }
202 }
203 }
204 }
205
206 if (interfaceRef == null)
207 throw new IOException("Town/city " + wmsLayer.getLocation() + " not found.");
208 }
209
210 private void openInterface() throws IOException {
211 try {
212 // finally, open the interface on server side giving access to the wms server
213 String lines = null;
214 String ln = null;
215 URL interfaceURL = new URL(baseURL + "/scpc/"+interfaceRef);
216 urlConn = (HttpURLConnection)interfaceURL.openConnection();
217 urlConn.setRequestMethod("GET");
218 setCookie();
219 urlConn.connect();
220 if (urlConn.getResponseCode() != HttpURLConnection.HTTP_OK) {
221 throw new IOException("Cannot open Cadastre interface. GET response:"+urlConn.getResponseCode());
222 }
223 System.out.println("GET "+interfaceURL);
224 BufferedReader in = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
225 // read the buffer otherwise we sent POST too early
226 while ((ln = in.readLine()) != null) {
227 lines += ln;
228 }
229 } catch (MalformedURLException e) {
230 throw (IOException) new IOException(
231 "CadastreGrabber: Illegal url.").initCause(e);
232 }
233 }
234
235 /**
236 * Post the form with the commune name and check the returned answer which is embedded
237 * in HTTP XML packets. This function doesn't use an XML parser yet but that would be a good idea
238 * for the next releases.
239 * Two possibilities :
240 * - either the commune name matches and we receive an URL starting with "afficherCarteCommune.do" or
241 * - we don't receive a single answer but a list of possible values. This answer looks like:
242 * <select name="codeCommune" class="long erreur" id="codeCommune">
243 * <option value="">Choisir</option>
244 * <option value="50061" >COLMARS - 04370</option>
245 * <option value="QK066" >COLMAR - 68000</option>
246 * </select>
247 * The returned string is the interface name used in further requests, e.g. "afficherCarteCommune.do?c=QP224"
248 * where QP224 is the code commune known by the WMS (or "afficherCarteTa.do?c=..." for raster images).
249 *
250 * @param location
251 * @param codeCommune
252 * @return retURL url to available code commune in the cadastre; "" if not found
253 * @throws IOException
254 */
255 private String postForm(WMSLayer wmsLayer, String codeCommune) throws IOException {
256 try {
257 String ln = null;
258 String lines = null;
259 listOfCommunes.clear();
260 listOfTA.clear();
261 // send a POST request with a city/town/village name
262 String content = "numerovoie=";
263 content += "&indiceRepetition=";
264 content += "&nomvoie=";
265 content += "&lieuDit=";
266 if (codeCommune == "") {
267 content += "&ville=" + new String(java.net.URLEncoder.encode(wmsLayer.getLocation(), "UTF-8"));
268 content += "&codePostal=";
269 } else {
270 content += "&codeCommune=" + codeCommune;
271 }
272 content += "&codeDepartement=";
273 content += wmsLayer.getDepartement();
274 content += "&nbResultatParPage=10";
275 content += "&x=0&y=0";
276 searchFormURL = new URL(baseURL + "/scpc/rechercherPlan.do");
277 urlConn = (HttpURLConnection)searchFormURL.openConnection();
278 urlConn.setRequestMethod("POST");
279 urlConn.setDoOutput(true);
280 urlConn.setDoInput(true);
281 setCookie();
282 OutputStream wr = urlConn.getOutputStream();
283 wr.write(content.getBytes());
284 System.out.println("POST "+content);
285 wr.flush();
286 wr.close();
287 BufferedReader rd = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
288 while ((ln = rd.readLine()) != null) {
289 lines += ln;
290 }
291 rd.close();
292 urlConn.disconnect();
293 if (lines != null) {
294 if (lines.indexOf(cImageFormat) != -1) {
295 int i = lines.indexOf(cImageFormat);
296 int j = lines.indexOf(".", i);
297 wmsLayer.setRaster(lines.substring(i+cImageFormat.length(), j).equals("image"));
298 }
299 if (!wmsLayer.isRaster() && lines.indexOf(cInterfaceVector) != -1) { // "afficherCarteCommune.do"
300 // shall be something like: interfaceRef = "afficherCarteCommune.do?c=X2269";
301 lines = lines.substring(lines.indexOf(cInterfaceVector),lines.length());
302 lines = lines.substring(0, lines.indexOf("'"));
303 System.out.println("interface ref.:"+lines);
304 return lines;
305 } else if (wmsLayer.isRaster() && lines.indexOf(cInterfaceRasterTA) != -1) { // "afficherCarteTa.do"
306 // list of values parsed in listOfFeuilles (list all non-georeferenced images)
307 lines = getFeuillesList();
308 if (!downloadCanceled) {
309 parseFeuillesList(lines);
310 if (listOfFeuilles.size() > 0) {
311 int res = selectFeuilleDialog();
312 if (res != -1) {
313 wmsLayer.setCodeCommune(listOfFeuilles.elementAt(res).name);
314 checkLayerDuplicates(wmsLayer);
315 interfaceRef = buildRasterFeuilleInterfaceRef(wmsLayer.getCodeCommune());
316 wmsLayer.setCodeCommune(listOfFeuilles.elementAt(res).ref);
317 lines = buildRasterFeuilleInterfaceRef(listOfFeuilles.elementAt(res).ref);
318 System.out.println("interface ref.:"+lines);
319 return lines;
320 }
321 }
322 }
323 return null;
324 } else if (lines.indexOf(cCommuneListStart) != -1 && lines.indexOf(cCommuneListEnd) != -1) {
325 // list of values parsed in listOfCommunes
326 int i = lines.indexOf(cCommuneListStart);
327 int j = lines.indexOf(cCommuneListEnd, i);
328 parseCommuneList(lines.substring(i, j));
329 }
330 }
331 } catch (MalformedURLException e) {
332 throw (IOException) new IOException(
333 "Illegal url.").initCause(e);
334 } catch (Exception e){
335 e.printStackTrace();
336 }
337 return null;
338 }
339
340 private void parseCommuneList(String input) {
341 if (input.indexOf(c0ptionListStart) != -1) {
342 while (input.indexOf("<option value=\"") != -1) {
343 int i = input.indexOf(c0ptionListStart);
344 int j = input.indexOf(cOptionListEnd, i+c0ptionListStart.length());
345 int k = input.indexOf("\"", i+c0ptionListStart.length());
346 if (j != -1 && k > (i + c0ptionListStart.length())) {
347 String lov = new String(input.substring(i+c0ptionListStart.length()-1, j));
348 if (lov.indexOf(">") != -1) {
349 System.out.println("parse "+lov);
350 listOfCommunes.add(lov);
351 } else
352 System.err.println("unable to parse commune string:"+lov);
353 }
354 input = input.substring(j+cOptionListEnd.length());
355 }
356 }
357 }
358
359 private String getFeuillesList() {
360 // get all images in one html page
361 String ln = null;
362 String lines = null;
363 HttpURLConnection urlConn2 = null;
364 try {
365 URL getAllImagesURL = new URL(baseURL + "/scpc/listerFeuillesParcommune.do?keepVolatileSession=&offset=2000");
366 urlConn2 = (HttpURLConnection)getAllImagesURL.openConnection();
367 setCookie(urlConn2);
368 urlConn2.connect();
369 System.out.println("GET "+getAllImagesURL);
370 BufferedReader rd = new BufferedReader(new InputStreamReader(urlConn2.getInputStream()));
371 while ((ln = rd.readLine()) != null) {
372 lines += ln;
373 }
374 rd.close();
375 urlConn2.disconnect();
376 //System.out.println("GET="+lines);
377 } catch (IOException e) {
378 listOfFeuilles.clear();
379 e.printStackTrace();
380 }
381 return lines;
382 }
383
384 private void parseFeuillesList(String input) {
385 listOfFeuilles.clear();
386 // get "Tableau d'assemblage"
387 String inputTA = input;
388 if (Main.pref.getBoolean("cadastrewms.useTA", false)) {
389 while (inputTA.indexOf(cTAImageLinkStart) != -1) {
390 inputTA = inputTA.substring(inputTA.indexOf(cTAImageLinkStart) + cTAImageLinkStart.length());
391 String refTA = inputTA.substring(0, inputTA.indexOf("'"));
392 String nameTA = inputTA.substring(inputTA.indexOf(cTAImageNameStart) + cTAImageNameStart.length());
393 nameTA = nameTA.substring(0, nameTA.indexOf("<"));
394 listOfFeuilles.add(new PlanImage(nameTA, refTA));
395 }
396 }
397 // get "Feuilles"
398 while (input.indexOf(cImageLinkStart) != -1) {
399 input = input.substring(input.indexOf(cImageLinkStart)+cImageLinkStart.length());
400 String refFeuille = input.substring(0, input.indexOf("'"));
401 String nameFeuille = input.substring(
402 input.indexOf(cImageNameStart)+cImageNameStart.length(),
403 input.indexOf(" -"));
404 listOfFeuilles.add(new PlanImage(nameFeuille, refFeuille));
405 }
406 }
407
408 private String selectMunicipalityDialog(WMSLayer wmsLayer) {
409 JPanel p = new JPanel(new GridBagLayout());
410 String[] communeList = new String[listOfCommunes.size() + 1];
411 communeList[0] = tr("Choose from...");
412 for (int i = 0; i < listOfCommunes.size(); i++) {
413 communeList[i + 1] = listOfCommunes.elementAt(i).substring(listOfCommunes.elementAt(i).indexOf(">")+1);
414 }
415 JComboBox inputCommuneList = new JComboBox(communeList);
416 p.add(inputCommuneList, GBC.eol().fill(GBC.HORIZONTAL).insets(10, 0, 0, 0));
417 JOptionPane pane = new JOptionPane(p, JOptionPane.INFORMATION_MESSAGE, JOptionPane.OK_CANCEL_OPTION, null) {
418 private static final long serialVersionUID = 1L;
419 };
420 //pane.createDialog(Main.parent, tr("Select commune")).setVisible(true);
421 // this below is a temporary workaround to fix the "always on top" issue
422 JDialog dialog = pane.createDialog(Main.parent, tr("Select commune"));
423 CadastrePlugin.prepareDialog(dialog);
424 dialog.setVisible(true);
425 // till here
426 if (!Integer.valueOf(JOptionPane.OK_OPTION).equals(pane.getValue()))
427 return null;
428 return listOfCommunes.elementAt(inputCommuneList.getSelectedIndex()-1);
429 }
430
431 private int selectFeuilleDialog() {
432 JPanel p = new JPanel(new GridBagLayout());
433 Vector<String> ImageNames = new Vector<String>();
434 for (PlanImage src : listOfFeuilles) {
435 ImageNames.add(src.name);
436 }
437 JComboBox inputFeuilleList = new JComboBox(ImageNames);
438 p.add(inputFeuilleList, GBC.eol().fill(GBC.HORIZONTAL).insets(10, 0, 0, 0));
439 JOptionPane pane = new JOptionPane(p, JOptionPane.INFORMATION_MESSAGE, JOptionPane.OK_CANCEL_OPTION, null);
440 //pane.createDialog(Main.parent, tr("Select Feuille")).setVisible(true);
441 // this below is a temporary workaround to fix the "always on top" issue
442 JDialog dialog = pane.createDialog(Main.parent, tr("Select Feuille"));
443 CadastrePlugin.prepareDialog(dialog);
444 dialog.setVisible(true);
445 // till here
446 if (!Integer.valueOf(JOptionPane.OK_OPTION).equals(pane.getValue()))
447 return -1;
448 int result = inputFeuilleList.getSelectedIndex();
449 return result;
450 }
451
452 private String buildRasterFeuilleInterfaceRef(String codeCommune) {
453 return cInterfaceRasterFeuille + "?f=" + codeCommune;
454 }
455
456 /**
457 * Retrieve the bounding box size in pixels of the whole commune (point 0,0 at top, left corner)
458 * and store it in given wmsLayer
459 * In case of raster image, we also check in the same http request if the image is already georeferenced
460 * and store the result in the wmsLayer as well.
461 * @param wmsLayer the WMSLayer where the commune data and images are stored
462 * @throws IOException
463 */
464 public void retrieveCommuneBBox(WMSLayer wmsLayer) throws IOException {
465 if (interfaceRef == null)
466 return;
467 String ln = null;
468 String line = null;
469 // send GET opening normally the small window with the commune overview
470 String content = baseURL + "/scpc/" + interfaceRef;
471 content += "&dontSaveLastForward&keepVolatileSession=";
472 searchFormURL = new URL(content);
473 urlConn = (HttpURLConnection)searchFormURL.openConnection();
474 urlConn.setRequestMethod("GET");
475 setCookie();
476 urlConn.connect();
477 if (urlConn.getResponseCode() != HttpURLConnection.HTTP_OK) {
478 throw new IOException("Cannot get Cadastre response.");
479 }
480 System.out.println("GET "+searchFormURL);
481 BufferedReader in = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
482 while ((ln = in.readLine()) != null) {
483 line += ln;
484 }
485 in.close();
486 urlConn.disconnect();
487 parseBBoxCommune(wmsLayer, line);
488 if (wmsLayer.isRaster() && !wmsLayer.isAlreadyGeoreferenced()) {
489 parseGeoreferences(wmsLayer, line);
490 }
491 }
492
493 private void parseBBoxCommune(WMSLayer wmsLayer, String input) {
494 if (input.indexOf(cBBoxCommunStart) != -1) {
495 input = input.substring(input.indexOf(cBBoxCommunStart));
496 int i = input.indexOf(",");
497 double minx = Double.parseDouble(input.substring(cBBoxCommunStart.length(), i));
498 int j = input.indexOf(",", i+1);
499 double miny = Double.parseDouble(input.substring(i+1, j));
500 int k = input.indexOf(",", j+1);
501 double maxx = Double.parseDouble(input.substring(j+1, k));
502 int l = input.indexOf(cBBoxCommunEnd, k+1);
503 double maxy = Double.parseDouble(input.substring(k+1, l));
504 wmsLayer.setCommuneBBox( new EastNorthBound(new EastNorth(minx,miny), new EastNorth(maxx,maxy)));
505 }
506 }
507
508 private void parseGeoreferences(WMSLayer wmsLayer, String input) {
509 if (input.lastIndexOf(cBBoxCommunStart) != -1) {
510 input = input.substring(input.lastIndexOf(cBBoxCommunStart));
511 input = input.substring(input.indexOf(cBBoxCommunEnd)+cBBoxCommunEnd.length());
512 int i = input.indexOf(",");
513 int j = input.indexOf(",", i+1);
514 String str = input.substring(i+1, j);
515 double unknown_yet = tryParseDouble(str);
516 int j_ = input.indexOf(",", j+1);
517 double angle = Double.parseDouble(input.substring(j+1, j_));
518 int k = input.indexOf(",", j_+1);
519 double scale_origin = Double.parseDouble(input.substring(j_+1, k));
520 int l = input.indexOf(",", k+1);
521 double dpi = Double.parseDouble(input.substring(k+1, l));
522 int m = input.indexOf(",", l+1);
523 double fX = Double.parseDouble(input.substring(l+1, m));
524 int n = input.indexOf(",", m+1);
525 double fY = Double.parseDouble(input.substring(m+1, n));
526 int o = input.indexOf(",", n+1);
527 double X0 = Double.parseDouble(input.substring(n+1, o));
528 int p = input.indexOf(",", o+1);
529 double Y0 = Double.parseDouble(input.substring(o+1, p));
530 if (X0 != 0.0 && Y0 != 0) {
531 wmsLayer.setAlreadyGeoreferenced(true);
532 wmsLayer.fX = fX;
533 wmsLayer.fY = fY;
534 wmsLayer.angle = angle;
535 wmsLayer.X0 = X0;
536 wmsLayer.Y0 = Y0;
537 }
538 System.out.println("parse georef:"+unknown_yet+","+angle+","+scale_origin+","+dpi+","+fX+","+
539 fY+","+X0+","+Y0);
540 }
541 }
542
543 private double tryParseDouble(String str) {
544 try {
545 return Double.parseDouble(str);
546 } catch (NumberFormatException e) {
547 return 0;
548 }
549 }
550
551 private void checkLayerDuplicates(WMSLayer wmsLayer) throws DuplicateLayerException {
552 if (Main.map != null) {
553 for (Layer l : Main.map.mapView.getAllLayers()) {
554 if (l instanceof WMSLayer && l.getName().equals(wmsLayer.getName()) && (l != wmsLayer)) {
555 System.out.println("Try to grab into a new layer when "+wmsLayer.getName()+" is already opened.");
556 // remove the duplicated layer
557 Main.map.mapView.removeLayer(wmsLayer);
558 throw new DuplicateLayerException();
559 }
560 }
561 }
562 }
563
564 public void cancel() {
565 if (urlConn != null) {
566 urlConn.setConnectTimeout(1);
567 urlConn.setReadTimeout(1);
568 //urlConn.disconnect();
569 }
570 downloadCanceled = true;
571 lastWMSLayerName = null;
572 }
573
574}
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