svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.remoteclient / src / main / java / org / gvsig / remoteclient / wms / WMSProtocolHandler.java @ 40559
History | View | Annotate | Download (24.6 KB)
1 |
/**
|
---|---|
2 |
* gvSIG. Desktop Geographic Information System.
|
3 |
*
|
4 |
* Copyright (C) 2007-2013 gvSIG Association.
|
5 |
*
|
6 |
* This program is free software; you can redistribute it and/or
|
7 |
* modify it under the terms of the GNU General Public License
|
8 |
* as published by the Free Software Foundation; either version 3
|
9 |
* of the License, or (at your option) any later version.
|
10 |
*
|
11 |
* This program is distributed in the hope that it will be useful,
|
12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
14 |
* GNU General Public License for more details.
|
15 |
*
|
16 |
* You should have received a copy of the GNU General Public License
|
17 |
* along with this program; if not, write to the Free Software
|
18 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
19 |
* MA 02110-1301, USA.
|
20 |
*
|
21 |
* For any additional information, do not hesitate to contact us
|
22 |
* at info AT gvsig.com, or visit our website www.gvsig.com.
|
23 |
*/
|
24 |
package org.gvsig.remoteclient.wms; |
25 |
|
26 |
import java.io.ByteArrayInputStream; |
27 |
import java.io.File; |
28 |
import java.io.FileInputStream; |
29 |
import java.io.FileReader; |
30 |
import java.io.IOException; |
31 |
import java.io.InputStream; |
32 |
import java.net.URL; |
33 |
import java.net.URLConnection; |
34 |
import java.nio.ByteBuffer; |
35 |
import java.nio.channels.FileChannel; |
36 |
import java.util.ArrayList; |
37 |
import java.util.Iterator; |
38 |
import java.util.StringTokenizer; |
39 |
import java.util.TreeMap; |
40 |
|
41 |
import org.gvsig.compat.net.ICancellable; |
42 |
import org.gvsig.remoteclient.exceptions.ServerErrorException; |
43 |
import org.gvsig.remoteclient.exceptions.WMSException; |
44 |
import org.gvsig.remoteclient.ogc.OGCProtocolHandler; |
45 |
import org.gvsig.remoteclient.ogc.OGCServiceInformation; |
46 |
import org.gvsig.remoteclient.utils.CapabilitiesTags; |
47 |
import org.gvsig.remoteclient.utils.ExceptionTags; |
48 |
import org.gvsig.remoteclient.utils.Utilities; |
49 |
import org.gvsig.remoteclient.wms.request.WMSGetCapabilitiesRequest; |
50 |
import org.gvsig.remoteclient.wms.request.WMSGetFeatureInfoRequest; |
51 |
import org.gvsig.remoteclient.wms.request.WMSGetLegendGraphicRequest; |
52 |
import org.gvsig.remoteclient.wms.request.WMSGetMapRequest; |
53 |
import org.kxml2.io.KXmlParser; |
54 |
import org.xmlpull.v1.XmlPullParserException; |
55 |
|
56 |
/**
|
57 |
* <p> Abstract class that represents handlers to comunicate via WMS protocol.
|
58 |
* </p>
|
59 |
*
|
60 |
*/
|
61 |
public abstract class WMSProtocolHandler extends OGCProtocolHandler { |
62 |
/**
|
63 |
* Encoding used to parse different xml documents.
|
64 |
*/
|
65 |
protected String encoding = "UTF-8"; |
66 |
/**
|
67 |
* WMS metadata
|
68 |
*/
|
69 |
protected WMSServiceInformation serviceInfo;
|
70 |
public TreeMap layers; |
71 |
public WMSLayer rootLayer;
|
72 |
|
73 |
/**
|
74 |
* returns the alfanumeric information of the layers at the specified point.
|
75 |
* the diference between the other getfeatureInfo method is that this will
|
76 |
* be implemented by each specific version because the XML from the server will be
|
77 |
* parsed and presented by a well known structure.
|
78 |
*/
|
79 |
|
80 |
public String getName() { |
81 |
return name;
|
82 |
} |
83 |
|
84 |
/*
|
85 |
* (non-Javadoc)
|
86 |
* @see org.gvsig.remoteClient.ogc.OGCProtocolHandler#getServiceInformation()
|
87 |
*/
|
88 |
public OGCServiceInformation getServiceInformation() {
|
89 |
return serviceInfo;
|
90 |
} |
91 |
|
92 |
/**
|
93 |
* <p>Builds a GetCapabilities request that is sent to the WMS
|
94 |
* the response will be parse to extract the data needed by the
|
95 |
* WMS client</p>
|
96 |
* @param override, if true the previous downloaded data will be overridden
|
97 |
*/
|
98 |
public void getCapabilities(WMSStatus status, boolean override, ICancellable cancel) { |
99 |
URL request = null; |
100 |
try {
|
101 |
request = new URL(buildCapabilitiesRequest(status)); |
102 |
} catch(Exception e) { |
103 |
e.printStackTrace(); |
104 |
} |
105 |
try {
|
106 |
if (override)
|
107 |
Utilities.removeURL(request);
|
108 |
File f = Utilities.downloadFile(request,"wms_capabilities.xml", cancel); |
109 |
//WMSGetCapabilitiesRequest request = createGetCapabilitiesRequest(status);
|
110 |
//File f = request.sendRequest();
|
111 |
if (f == null) |
112 |
return;
|
113 |
clear(); |
114 |
parseCapabilities(f); |
115 |
} catch(Exception e) { |
116 |
e.printStackTrace(); |
117 |
} |
118 |
} |
119 |
|
120 |
private void clear() { |
121 |
layers.clear(); |
122 |
serviceInfo.clear(); |
123 |
} |
124 |
|
125 |
/**
|
126 |
* <p>It will send a GetFeatureInfo request to the WMS
|
127 |
* Parsing the response and redirecting the info to the WMS client</p>
|
128 |
* TODO: return a stored file instead a String.
|
129 |
*/
|
130 |
public String getFeatureInfo(WMSStatus status, int x, int y, int featureCount, ICancellable cancel) |
131 |
{ |
132 |
StringBuffer output = new StringBuffer(); |
133 |
String outputFormat = new String(); |
134 |
String ServiceException = "ServiceExceptionReport"; |
135 |
StringBuffer sb = new StringBuffer(); |
136 |
sb.append("<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>");
|
137 |
try
|
138 |
{ |
139 |
WMSGetFeatureInfoRequest request = createGetFeatureInfoRequest(status, x, y); |
140 |
URL url = request.getURL();
|
141 |
outputFormat = url.openConnection().getContentType(); |
142 |
File f = request.sendRequest(cancel);
|
143 |
if (f == null){ |
144 |
return ""; |
145 |
} |
146 |
|
147 |
FileReader fReader = new FileReader(f); |
148 |
char[] buffer = new char[1024*256]; |
149 |
for (int i = fReader.read(buffer); i>0; i = fReader.read(buffer)) |
150 |
{ |
151 |
String str = new String(buffer,0,i); |
152 |
output.append(str); |
153 |
} |
154 |
if ( (outputFormat == null) || (outputFormat.indexOf("xml") != -1) |
155 |
||output.toString().toLowerCase().startsWith("<?xml")
|
156 |
||(outputFormat.indexOf("gml") != -1)) |
157 |
{ |
158 |
int tag;
|
159 |
KXmlParser kxmlParser = null;
|
160 |
kxmlParser = new KXmlParser();
|
161 |
//kxmlParser.setInput(new StringReader(output.toString()));
|
162 |
kxmlParser.setInput(new FileReader(f)); |
163 |
|
164 |
tag = kxmlParser.nextTag(); |
165 |
if (kxmlParser.getName().compareTo(ServiceException)==0) |
166 |
{ |
167 |
sb.append("<INFO>").append(parseException( output.toString().getBytes())).append("</INFO>"); |
168 |
return sb.toString();
|
169 |
} |
170 |
else if (kxmlParser.getName().compareToIgnoreCase("ERROR")==0) |
171 |
{ |
172 |
return output.toString();
|
173 |
} |
174 |
else
|
175 |
{ |
176 |
return output.toString();
|
177 |
} |
178 |
} |
179 |
else
|
180 |
{ |
181 |
//Para que funcione con el GetFeatureInfo Viewer generico hay que devolver:
|
182 |
return output.toString();
|
183 |
} |
184 |
} |
185 |
catch(XmlPullParserException parserEx)
|
186 |
{ |
187 |
if (output.toString().toLowerCase().indexOf("xml") != -1) |
188 |
{ |
189 |
return output.toString().trim();
|
190 |
} |
191 |
else
|
192 |
{ |
193 |
sb.append("<INFO>").append("Info format not supported").append("</INFO>"); |
194 |
return sb.toString();
|
195 |
} |
196 |
} |
197 |
catch(Exception e) |
198 |
{ |
199 |
e.printStackTrace(); |
200 |
sb.append("<INFO>").append("Info format not supported").append("</INFO>"); |
201 |
return sb.toString();
|
202 |
|
203 |
} |
204 |
} |
205 |
/**
|
206 |
* <p>Builds a GetMap request that is sent to the WMS
|
207 |
* the response (image) will be redirect to the
|
208 |
* WMS client</p>
|
209 |
*/
|
210 |
public byte[] _getMap(WMSStatus status) throws ServerErrorException, WMSException |
211 |
{ |
212 |
try
|
213 |
{ |
214 |
//TODO:
|
215 |
//pass this buildXXXRequest to the WMSProtocolHandlerXXX: The request can depend on the WMS version.
|
216 |
WMSGetMapRequest request = createGetMapRequest(status); |
217 |
URL url = request.getURL();
|
218 |
|
219 |
URLConnection conn = url.openConnection();
|
220 |
System.out.println(request.toString());
|
221 |
String type = conn.getContentType();
|
222 |
|
223 |
|
224 |
byte[] imageBytes = null; |
225 |
byte[] buffer = new byte[1024*256]; |
226 |
InputStream is = conn.getInputStream();
|
227 |
int readed = 0; |
228 |
|
229 |
for (int i = is.read(buffer); i>0; i = is.read(buffer)){ |
230 |
// Creates a new buffer to contain the previous readed bytes and the next bunch of bytes
|
231 |
byte[] buffered = new byte[readed+i]; |
232 |
for (int j = 0; j < buffered.length; j++) { |
233 |
if (j<readed){
|
234 |
// puts the previously downloaded bytes into the image buffer
|
235 |
buffered[j] = imageBytes[j]; |
236 |
} |
237 |
else {
|
238 |
// appends the recently downloaded bytes to the image buffer.
|
239 |
buffered[j] = buffer[j-readed]; |
240 |
} |
241 |
} |
242 |
imageBytes = (byte[]) buffered.clone(); |
243 |
readed += i; |
244 |
} |
245 |
|
246 |
if ((type !=null && !type.subSequence(0,5).equals("image")) |
247 |
||(Utilities.isTextData(imageBytes)))
|
248 |
{ |
249 |
WMSException wmsEx = null;
|
250 |
|
251 |
String exceptionMessage = parseException(imageBytes);
|
252 |
if (exceptionMessage==null) |
253 |
{ |
254 |
String error = new String(imageBytes); |
255 |
int pos = error.indexOf("<?xml"); |
256 |
if (pos!= -1) |
257 |
{ |
258 |
String xml = error.substring(pos,error.length());
|
259 |
exceptionMessage = parseException(xml.getBytes()); |
260 |
if (exceptionMessage == null) |
261 |
exceptionMessage = new String(imageBytes); |
262 |
} |
263 |
} |
264 |
wmsEx = new WMSException(exceptionMessage);
|
265 |
wmsEx.setWMSMessage(new String(imageBytes)); |
266 |
throw wmsEx;
|
267 |
} |
268 |
return imageBytes;
|
269 |
} |
270 |
catch(IOException e) |
271 |
{ |
272 |
e.printStackTrace(); |
273 |
throw new ServerErrorException(); |
274 |
} |
275 |
} |
276 |
|
277 |
public File getLegendGraphic_old(WMSStatus status, String layerName, ICancellable cancel) throws ServerErrorException, WMSException |
278 |
{ |
279 |
try
|
280 |
{ |
281 |
WMSGetLegendGraphicRequest request = createGetLegendGraphicRequest(status, layerName); |
282 |
File f = request.sendRequest(cancel);
|
283 |
if (f== null) |
284 |
return null; |
285 |
if (Utilities.isTextFile(f)) { |
286 |
|
287 |
byte[] data = fileToBytes(f); |
288 |
|
289 |
WMSException wmsEx = null;
|
290 |
|
291 |
String exceptionMessage = parseException(data);
|
292 |
if (exceptionMessage==null) |
293 |
{ |
294 |
String error = new String(data); |
295 |
int pos = error.indexOf("<?xml"); |
296 |
if (pos!= -1) |
297 |
{ |
298 |
String xml = error.substring(pos,error.length());
|
299 |
exceptionMessage = parseException(xml.getBytes()); |
300 |
} |
301 |
if (exceptionMessage == null) |
302 |
exceptionMessage = new String(data); |
303 |
|
304 |
} |
305 |
wmsEx = new WMSException(exceptionMessage);
|
306 |
wmsEx.setWMSMessage(new String(data)); |
307 |
downloader.removeURL(request); |
308 |
throw wmsEx;
|
309 |
} |
310 |
return f;
|
311 |
} |
312 |
catch(IOException e) |
313 |
{ |
314 |
e.printStackTrace(); |
315 |
throw new ServerErrorException(); |
316 |
} |
317 |
} |
318 |
|
319 |
public File getLegendGraphic(WMSStatus status, String layerName, ICancellable cancel) |
320 |
throws ServerErrorException, WMSException {
|
321 |
URL request = null; |
322 |
try {
|
323 |
request = new URL(buildGetLegendGraphicRequest(status, layerName)); |
324 |
System.out.println(request);
|
325 |
File f = Utilities.downloadFile(request, "wmsGetLegendGraphic", cancel); |
326 |
if (f== null) |
327 |
return null; |
328 |
if (Utilities.isTextFile(f)) { |
329 |
FileInputStream fis = new FileInputStream(f); |
330 |
FileChannel fc = fis.getChannel();
|
331 |
byte[] data = new byte[(int)fc.size()]; |
332 |
ByteBuffer bb = ByteBuffer.wrap(data); |
333 |
fc.read(bb); |
334 |
|
335 |
WMSException wmsEx = null;
|
336 |
|
337 |
String exceptionMessage = parseException(data);
|
338 |
if (exceptionMessage == null) { |
339 |
String error = new String(data); |
340 |
int pos = error.indexOf("<?xml"); |
341 |
if (pos!= -1) { |
342 |
String xml = error.substring(pos,error.length());
|
343 |
exceptionMessage = parseException(xml.getBytes()); |
344 |
} |
345 |
if (exceptionMessage == null) |
346 |
exceptionMessage = new String(data); |
347 |
|
348 |
} |
349 |
wmsEx = new WMSException(exceptionMessage);
|
350 |
wmsEx.setWMSMessage(new String(data)); |
351 |
Utilities.removeURL(request);
|
352 |
throw wmsEx;
|
353 |
} |
354 |
return f;
|
355 |
} catch(IOException e) { |
356 |
e.printStackTrace(); |
357 |
throw new ServerErrorException(); |
358 |
} |
359 |
} |
360 |
|
361 |
/**
|
362 |
* @return string that represents the url for getting the wms legend
|
363 |
* If the layer has the object layer-->style-->legendurl that url will be returned
|
364 |
* otherwise builds the getLegendGraphic according to the OGC WMS Specifications
|
365 |
*
|
366 |
*/
|
367 |
private String buildGetLegendGraphicRequest(WMSStatus status, String layerName) { |
368 |
//TODO: deal with more than one layer
|
369 |
WMSLayer lyr = (WMSLayer) this.layers.get(layerName);
|
370 |
WMSStyle sty =null;
|
371 |
if (lyr != null){ |
372 |
Iterator it = lyr.getStyles().iterator();
|
373 |
while (it.hasNext()){
|
374 |
sty = (WMSStyle) it.next(); |
375 |
if (sty.getName().equals(status.getStyles().get(0).toString())){ |
376 |
return sty.getLegendURLOnlineResourceHRef();
|
377 |
} |
378 |
} |
379 |
} |
380 |
//TODO: pass by parameter the legend output format?
|
381 |
StringBuffer req = new StringBuffer(); |
382 |
String symbol = null; |
383 |
String onlineResource = null; |
384 |
|
385 |
if (status.getOnlineResource() == null) |
386 |
onlineResource = getHost(); |
387 |
else
|
388 |
onlineResource = status.getOnlineResource(); |
389 |
symbol = getSymbol(onlineResource); |
390 |
|
391 |
req.append(onlineResource + symbol + "REQUEST=GetLegendGraphic&SERVICE=WMS&VERSION=").append(getVersion());
|
392 |
req.append("&LAYER=" + layerName).append("&TRANSPARENT=TRUE").append("&FORMAT=image/png"); |
393 |
String aux = req.toString().replaceAll(" ", "%20"); |
394 |
System.out.println("GetLegendGraphic url:" + aux); |
395 |
return aux;
|
396 |
} |
397 |
|
398 |
public URL getMapURL(WMSStatus status, ICancellable cancel) throws ServerErrorException, WMSException { |
399 |
try {
|
400 |
WMSGetMapRequest request = createGetMapRequest(status); |
401 |
return request.getURL();
|
402 |
} catch(IOException e) { |
403 |
e.printStackTrace(); |
404 |
throw new ServerErrorException(); |
405 |
} |
406 |
} |
407 |
|
408 |
/**
|
409 |
* Returns the exception message if the file is a XML instead of a image.
|
410 |
* @param file3
|
411 |
* @return
|
412 |
* @throws IOException
|
413 |
*/
|
414 |
public String getExceptionMessage(File f) throws IOException { |
415 |
if (f == null) |
416 |
return null; |
417 |
|
418 |
if (Utilities.isTextFile(f)) { |
419 |
byte[] data = fileToBytes(f); |
420 |
|
421 |
String exceptionMessage = parseException(data);
|
422 |
if (exceptionMessage == null) { |
423 |
String error = new String(data); |
424 |
int pos = error.indexOf("<?xml"); |
425 |
if (pos!= -1) { |
426 |
String xml = error.substring(pos,error.length());
|
427 |
exceptionMessage = parseException(xml.getBytes()); |
428 |
} |
429 |
if (exceptionMessage == null) |
430 |
exceptionMessage = new String(data); |
431 |
} |
432 |
return exceptionMessage;
|
433 |
} |
434 |
return null; |
435 |
} |
436 |
|
437 |
public File getMap(WMSStatus status, ICancellable cancel) throws ServerErrorException, WMSException { |
438 |
try {
|
439 |
WMSGetMapRequest request = createGetMapRequest(status); |
440 |
File f = request.sendRequest(cancel);
|
441 |
|
442 |
if (f== null) |
443 |
return null; |
444 |
if (Utilities.isTextFile(f)) { |
445 |
byte[] data = fileToBytes(f); |
446 |
|
447 |
WMSException wmsEx = null;
|
448 |
|
449 |
String exceptionMessage = parseException(data);
|
450 |
if (exceptionMessage==null) { |
451 |
String error = new String(data); |
452 |
int pos = error.indexOf("<?xml"); |
453 |
if (pos!= -1) { |
454 |
String xml = error.substring(pos,error.length());
|
455 |
exceptionMessage = parseException(xml.getBytes()); |
456 |
// if (exceptionMessage == null)
|
457 |
// exceptionMessage = new String(data);
|
458 |
} |
459 |
if (exceptionMessage == null) |
460 |
exceptionMessage = new String(data); |
461 |
|
462 |
} |
463 |
wmsEx = new WMSException(exceptionMessage);
|
464 |
wmsEx.setWMSMessage(new String(data)); |
465 |
|
466 |
// Since it is an error file, It must be deleted from the cache
|
467 |
downloader.removeURL(request); |
468 |
throw wmsEx;
|
469 |
} |
470 |
return f;
|
471 |
} catch(IOException e) { |
472 |
throw new ServerErrorException(e.getMessage(), e); |
473 |
} |
474 |
} |
475 |
|
476 |
|
477 |
/* (non-Javadoc)
|
478 |
* @see org.gvsig.remoteClient.wms.WMSProtocolHandler#parseException(byte[])
|
479 |
*/
|
480 |
protected String parseException(byte[] data) { |
481 |
ArrayList errors = new ArrayList(); |
482 |
KXmlParser kxmlParser = new KXmlParser();
|
483 |
try
|
484 |
{ |
485 |
kxmlParser.setInput(new ByteArrayInputStream(data), encoding); |
486 |
kxmlParser.nextTag(); |
487 |
int tag;
|
488 |
if ( kxmlParser.getEventType() != KXmlParser.END_DOCUMENT )
|
489 |
{ |
490 |
kxmlParser.require(KXmlParser.START_TAG, null, ExceptionTags.EXCEPTION_ROOT);
|
491 |
tag = kxmlParser.nextTag(); |
492 |
while(tag != KXmlParser.END_DOCUMENT)
|
493 |
{ |
494 |
switch(tag)
|
495 |
{ |
496 |
case KXmlParser.START_TAG:
|
497 |
if (kxmlParser.getName().compareTo(ExceptionTags.SERVICE_EXCEPTION)==0){ |
498 |
String errorCode = kxmlParser.getAttributeValue("", ExceptionTags.CODE); |
499 |
errorCode = (errorCode != null) ? "["+errorCode+"] " : ""; |
500 |
String errorMessage = kxmlParser.nextText();
|
501 |
errors.add(errorCode+errorMessage); |
502 |
} |
503 |
break;
|
504 |
case KXmlParser.END_TAG:
|
505 |
break;
|
506 |
|
507 |
} |
508 |
tag = kxmlParser.nextTag(); |
509 |
} |
510 |
//kxmlParser.require(KXmlParser.END_DOCUMENT, null, null);
|
511 |
} |
512 |
} |
513 |
catch(XmlPullParserException parser_ex){
|
514 |
parser_ex.printStackTrace(); |
515 |
} |
516 |
catch (IOException ioe) { |
517 |
ioe.printStackTrace(); |
518 |
} |
519 |
String message = errors.size()>0? "" : null; |
520 |
for (int i = 0; i < errors.size(); i++) { |
521 |
message += (String) errors.get(i)+"\n"; |
522 |
} |
523 |
return message;
|
524 |
} |
525 |
/**
|
526 |
* Builds the GetCapabilitiesRequest according to the OGC WMS Specifications
|
527 |
* without a VERSION, to get the highest version than a WMS supports.
|
528 |
*/
|
529 |
public static String buildCapabilitiesSuitableVersionRequest(String _host, String _version) |
530 |
{ |
531 |
int index = _host.indexOf('?'); |
532 |
|
533 |
if (index > -1) { |
534 |
String host = _host.substring(0, index + 1); |
535 |
String query = _host.substring(index + 1, _host.length()); |
536 |
|
537 |
StringTokenizer tokens = new StringTokenizer(query, "&"); |
538 |
String newQuery = "", token; |
539 |
|
540 |
// If there is a field or a value with spaces, (and then it's on different tokens) -> unify them
|
541 |
while (tokens.hasMoreTokens()) {
|
542 |
token = tokens.nextToken().trim(); |
543 |
|
544 |
if (token.toUpperCase().compareTo("REQUEST=GETCAPABILITIES") == 0) |
545 |
continue;
|
546 |
|
547 |
if (token.toUpperCase().compareTo("SERVICE=WMS") == 0) |
548 |
continue;
|
549 |
|
550 |
if ((_version != null) && (_version.length() > 0)) { |
551 |
if (token.toUpperCase().compareTo("VERSION=" + _version) == 0) |
552 |
continue;
|
553 |
} |
554 |
|
555 |
if (token.toUpperCase().compareTo("EXCEPTIONS=XML") == 0) |
556 |
continue;
|
557 |
|
558 |
newQuery += token + "&";
|
559 |
} |
560 |
|
561 |
_host = host + newQuery; |
562 |
} |
563 |
else {
|
564 |
_host += "?";
|
565 |
} |
566 |
|
567 |
if ((_version != null) && (_version.compareTo("") != 0)) |
568 |
_host += "REQUEST=GetCapabilities&SERVICE=WMS&VERSION=" + _version;
|
569 |
else
|
570 |
_host += "REQUEST=GetCapabilities&SERVICE=WMS";
|
571 |
|
572 |
return _host;
|
573 |
} |
574 |
|
575 |
/**
|
576 |
* Builds the GetCapabilitiesRequest according to the OGC WMS Specifications
|
577 |
* @param WMSStatus
|
578 |
*/
|
579 |
private String buildCapabilitiesRequest(WMSStatus status) |
580 |
{ |
581 |
StringBuffer req = new StringBuffer(); |
582 |
String symbol = null; |
583 |
|
584 |
String onlineResource;
|
585 |
if (status == null || status.getOnlineResource() == null) |
586 |
onlineResource = getHost(); |
587 |
else
|
588 |
onlineResource = status.getOnlineResource(); |
589 |
symbol = getSymbol(onlineResource); |
590 |
|
591 |
req.append(onlineResource).append(symbol).append("REQUEST=GetCapabilities&SERVICE=WMS&");
|
592 |
req.append("VERSION=").append(getVersion());
|
593 |
return req.toString();
|
594 |
} |
595 |
|
596 |
public void close() { |
597 |
// your code here
|
598 |
} |
599 |
|
600 |
/**
|
601 |
* @param status
|
602 |
* The WMS status
|
603 |
* @param protocolHandler
|
604 |
* The handler to parse the requests
|
605 |
* @return an object to send the GetMap requests
|
606 |
*/
|
607 |
protected abstract WMSGetMapRequest createGetMapRequest(WMSStatus status); |
608 |
|
609 |
protected abstract WMSGetFeatureInfoRequest createGetFeatureInfoRequest(WMSStatus status, int x, int y); |
610 |
|
611 |
protected abstract WMSGetLegendGraphicRequest createGetLegendGraphicRequest(WMSStatus status, String layerName); |
612 |
|
613 |
protected abstract WMSGetCapabilitiesRequest createGetCapabilitiesRequest(WMSStatus status); |
614 |
|
615 |
/**
|
616 |
* <p>Parses the Request tag </p>
|
617 |
*/
|
618 |
protected void parseRequestTag(KXmlParser parser) throws IOException, XmlPullParserException |
619 |
{ |
620 |
int currentTag;
|
621 |
boolean end = false; |
622 |
|
623 |
parser.require(KXmlParser.START_TAG, null, CapabilitiesTags.REQUEST);
|
624 |
currentTag = parser.next(); |
625 |
|
626 |
while (!end)
|
627 |
{ |
628 |
switch(currentTag)
|
629 |
{ |
630 |
case KXmlParser.START_TAG:
|
631 |
if (parser.getName().compareTo(CapabilitiesTags.GETCAPABILITIES)==0) |
632 |
{ |
633 |
parserDcpType(parser, CapabilitiesTags.GETCAPABILITIES); |
634 |
} |
635 |
else if (parser.getName().compareTo(CapabilitiesTags.GETMAP)==0) |
636 |
{ |
637 |
parseGetMapTag(parser); |
638 |
} |
639 |
else if (parser.getName().compareTo(CapabilitiesTags.GETFEATUREINFO)==0) |
640 |
{ |
641 |
parseGetFeatureInfoTag(parser); |
642 |
} |
643 |
else if (parser.getName().compareTo(CapabilitiesTags.DESCRIBELAYER)==0) |
644 |
{ |
645 |
parserDcpType(parser, CapabilitiesTags.DESCRIBELAYER); |
646 |
} |
647 |
else if (parser.getName().compareTo(CapabilitiesTags.GETLEGENDGRAPHIC)==0) |
648 |
{ |
649 |
parseGetLegendGraphicTag(parser); |
650 |
} |
651 |
break;
|
652 |
case KXmlParser.END_TAG:
|
653 |
if (parser.getName().compareTo(CapabilitiesTags.REQUEST) == 0) |
654 |
end = true;
|
655 |
break;
|
656 |
case KXmlParser.TEXT:
|
657 |
break;
|
658 |
} |
659 |
if(!end)
|
660 |
currentTag = parser.next(); |
661 |
} |
662 |
// TODO: does not get such a tag when arrives here!!!!!!
|
663 |
//parser.require(KXmlParser.END_TAG, null, CapabilitiesTags.REQUEST);
|
664 |
} |
665 |
/**
|
666 |
* <p>Parses the GetMap tag </p>
|
667 |
*/
|
668 |
protected void parseGetMapTag(KXmlParser parser) throws IOException, XmlPullParserException |
669 |
{ |
670 |
int currentTag;
|
671 |
boolean end = false; |
672 |
|
673 |
parser.require(KXmlParser.START_TAG, null, CapabilitiesTags.GETMAP);
|
674 |
currentTag = parser.next(); |
675 |
|
676 |
while (!end)
|
677 |
{ |
678 |
switch(currentTag)
|
679 |
{ |
680 |
case KXmlParser.START_TAG:
|
681 |
if (parser.getName().compareTo(CapabilitiesTags.FORMAT)==0) |
682 |
{ |
683 |
serviceInfo.formats.add(parser.nextText()); |
684 |
} |
685 |
else if (parser.getName().compareTo(CapabilitiesTags.DCPTYPE)==0) |
686 |
{ |
687 |
parserDcpType(parser, CapabilitiesTags.GETMAP); |
688 |
} |
689 |
break;
|
690 |
case KXmlParser.END_TAG:
|
691 |
if (parser.getName().compareTo(CapabilitiesTags.GETMAP) == 0) |
692 |
end = true;
|
693 |
break;
|
694 |
case KXmlParser.TEXT:
|
695 |
break;
|
696 |
} |
697 |
if(!end)
|
698 |
currentTag = parser.next(); |
699 |
} |
700 |
} |
701 |
|
702 |
/**
|
703 |
* <p>Parses the GetFeatureInfo tag </p>
|
704 |
*/
|
705 |
protected void parseGetFeatureInfoTag(KXmlParser parser) throws IOException, XmlPullParserException |
706 |
{ |
707 |
int currentTag;
|
708 |
boolean end = false; |
709 |
|
710 |
parser.require(KXmlParser.START_TAG, null, CapabilitiesTags.GETFEATUREINFO);
|
711 |
currentTag = parser.next(); |
712 |
|
713 |
while (!end)
|
714 |
{ |
715 |
switch(currentTag)
|
716 |
{ |
717 |
case KXmlParser.START_TAG:
|
718 |
if (parser.getName().compareTo(CapabilitiesTags.FORMAT)==0) |
719 |
{ |
720 |
serviceInfo.infoformats.add(parser.nextText()); |
721 |
} |
722 |
else if (parser.getName().compareTo(CapabilitiesTags.DCPTYPE)==0) |
723 |
{ |
724 |
parserDcpType(parser, CapabilitiesTags.GETFEATUREINFO); |
725 |
} |
726 |
break;
|
727 |
case KXmlParser.END_TAG:
|
728 |
if (parser.getName().compareTo(CapabilitiesTags.GETFEATUREINFO) == 0) |
729 |
end = true;
|
730 |
break;
|
731 |
case KXmlParser.TEXT:
|
732 |
break;
|
733 |
} |
734 |
if(!end)
|
735 |
currentTag = parser.next(); |
736 |
} |
737 |
} |
738 |
|
739 |
/**
|
740 |
* <p>Parses the GetLegendGraphic tag </p>
|
741 |
*/
|
742 |
protected void parseGetLegendGraphicTag(KXmlParser parser) throws IOException, XmlPullParserException |
743 |
{ |
744 |
int currentTag;
|
745 |
boolean end = false; |
746 |
|
747 |
parser.require(KXmlParser.START_TAG, null, CapabilitiesTags.GETLEGENDGRAPHIC);
|
748 |
currentTag = parser.next(); |
749 |
|
750 |
while (!end)
|
751 |
{ |
752 |
switch(currentTag)
|
753 |
{ |
754 |
case KXmlParser.START_TAG:
|
755 |
if (parser.getName().compareTo(CapabilitiesTags.FORMAT)==0) |
756 |
{ |
757 |
//TODO:
|
758 |
// add the supported formats by the GetLegendGraphic request
|
759 |
//serviceInfo.formats.add(parser.nextText());
|
760 |
} |
761 |
else if (parser.getName().compareTo(CapabilitiesTags.DCPTYPE)==0) |
762 |
{ |
763 |
parserDcpType(parser, CapabilitiesTags.GETLEGENDGRAPHIC); |
764 |
} |
765 |
break;
|
766 |
case KXmlParser.END_TAG:
|
767 |
if (parser.getName().compareTo(CapabilitiesTags.GETLEGENDGRAPHIC) == 0) |
768 |
end = true;
|
769 |
break;
|
770 |
case KXmlParser.TEXT:
|
771 |
break;
|
772 |
} |
773 |
if(!end)
|
774 |
currentTag = parser.next(); |
775 |
} |
776 |
} |
777 |
} |