source: josm/trunk/src/org/openstreetmap/josm/io/imagery/WMSImagery.java@ 15716

Last change on this file since 15716 was 15716, checked in by simon04, 4 years ago

Java 8: use String.join
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1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.io.imagery;
3
4import static java.nio.charset.StandardCharsets.UTF_8;
5import static org.openstreetmap.josm.tools.I18n.tr;
6
7import java.io.File;
8import java.io.IOException;
9import java.io.InputStream;
10import java.net.MalformedURLException;
11import java.net.URL;
12import java.nio.file.InvalidPathException;
13import java.util.ArrayList;
14import java.util.Collection;
15import java.util.Collections;
16import java.util.HashSet;
17import java.util.List;
18import java.util.Map;
19import java.util.Set;
20import java.util.concurrent.ConcurrentHashMap;
21import java.util.function.UnaryOperator;
22import java.util.regex.Pattern;
23import java.util.stream.Collectors;
24
25import javax.imageio.ImageIO;
26import javax.xml.namespace.QName;
27import javax.xml.stream.XMLStreamException;
28import javax.xml.stream.XMLStreamReader;
29
30import org.openstreetmap.josm.data.Bounds;
31import org.openstreetmap.josm.data.coor.EastNorth;
32import org.openstreetmap.josm.data.imagery.DefaultLayer;
33import org.openstreetmap.josm.data.imagery.GetCapabilitiesParseHelper;
34import org.openstreetmap.josm.data.imagery.ImageryInfo;
35import org.openstreetmap.josm.data.imagery.LayerDetails;
36import org.openstreetmap.josm.data.projection.Projection;
37import org.openstreetmap.josm.data.projection.Projections;
38import org.openstreetmap.josm.io.CachedFile;
39import org.openstreetmap.josm.tools.Logging;
40import org.openstreetmap.josm.tools.Utils;
41
42/**
43 * This class represents the capabilities of a WMS imagery server.
44 */
45public class WMSImagery {
46
47 private static final String SERVICE_WMS = "SERVICE=WMS";
48 private static final String REQUEST_GET_CAPABILITIES = "REQUEST=GetCapabilities";
49 private static final String CAPABILITIES_QUERY_STRING = SERVICE_WMS + "&" + REQUEST_GET_CAPABILITIES;
50
51 /**
52 * WMS namespace address
53 */
54 public static final String WMS_NS_URL = "http://www.opengis.net/wms";
55
56 // CHECKSTYLE.OFF: SingleSpaceSeparator
57 // WMS 1.0 - 1.3.0
58 private static final QName CAPABILITITES_ROOT_130 = new QName("WMS_Capabilities", WMS_NS_URL);
59 private static final QName QN_ABSTRACT = new QName(WMS_NS_URL, "Abstract");
60 private static final QName QN_CAPABILITY = new QName(WMS_NS_URL, "Capability");
61 private static final QName QN_CRS = new QName(WMS_NS_URL, "CRS");
62 private static final QName QN_DCPTYPE = new QName(WMS_NS_URL, "DCPType");
63 private static final QName QN_FORMAT = new QName(WMS_NS_URL, "Format");
64 private static final QName QN_GET = new QName(WMS_NS_URL, "Get");
65 private static final QName QN_GETMAP = new QName(WMS_NS_URL, "GetMap");
66 private static final QName QN_HTTP = new QName(WMS_NS_URL, "HTTP");
67 private static final QName QN_LAYER = new QName(WMS_NS_URL, "Layer");
68 private static final QName QN_NAME = new QName(WMS_NS_URL, "Name");
69 private static final QName QN_REQUEST = new QName(WMS_NS_URL, "Request");
70 private static final QName QN_SERVICE = new QName(WMS_NS_URL, "Service");
71 private static final QName QN_STYLE = new QName(WMS_NS_URL, "Style");
72 private static final QName QN_TITLE = new QName(WMS_NS_URL, "Title");
73 private static final QName QN_BOUNDINGBOX = new QName(WMS_NS_URL, "BoundingBox");
74 private static final QName QN_EX_GEOGRAPHIC_BBOX = new QName(WMS_NS_URL, "EX_GeographicBoundingBox");
75 private static final QName QN_WESTBOUNDLONGITUDE = new QName(WMS_NS_URL, "westBoundLongitude");
76 private static final QName QN_EASTBOUNDLONGITUDE = new QName(WMS_NS_URL, "eastBoundLongitude");
77 private static final QName QN_SOUTHBOUNDLATITUDE = new QName(WMS_NS_URL, "southBoundLatitude");
78 private static final QName QN_NORTHBOUNDLATITUDE = new QName(WMS_NS_URL, "northBoundLatitude");
79 private static final QName QN_ONLINE_RESOURCE = new QName(WMS_NS_URL, "OnlineResource");
80
81 // WMS 1.1 - 1.1.1
82 private static final QName CAPABILITIES_ROOT_111 = new QName("WMT_MS_Capabilities");
83 private static final QName QN_SRS = new QName("SRS");
84 private static final QName QN_LATLONBOUNDINGBOX = new QName("LatLonBoundingBox");
85
86 // CHECKSTYLE.ON: SingleSpaceSeparator
87
88 /**
89 * An exception that is thrown if there was an error while getting the capabilities of the WMS server.
90 */
91 public static class WMSGetCapabilitiesException extends Exception {
92 private final String incomingData;
93
94 /**
95 * Constructs a new {@code WMSGetCapabilitiesException}
96 * @param cause the cause (which is saved for later retrieval by the {@link #getCause()} method)
97 * @param incomingData the answer from WMS server
98 */
99 public WMSGetCapabilitiesException(Throwable cause, String incomingData) {
100 super(cause);
101 this.incomingData = incomingData;
102 }
103
104 /**
105 * Constructs a new {@code WMSGetCapabilitiesException}
106 * @param message the detail message. The detail message is saved for later retrieval by the {@link #getMessage()} method
107 * @param incomingData the answer from the server
108 * @since 10520
109 */
110 public WMSGetCapabilitiesException(String message, String incomingData) {
111 super(message);
112 this.incomingData = incomingData;
113 }
114
115 /**
116 * The data that caused this exception.
117 * @return The server response to the capabilities request.
118 */
119 public String getIncomingData() {
120 return incomingData;
121 }
122 }
123
124 private final Map<String, String> headers = new ConcurrentHashMap<>();
125 private String version = "1.1.1"; // default version
126 private String getMapUrl;
127 private URL capabilitiesUrl;
128 private final List<String> formats = new ArrayList<>();
129 private List<LayerDetails> layers = new ArrayList<>();
130
131 private String title;
132
133 /**
134 * Make getCapabilities request towards given URL
135 * @param url service url
136 * @throws IOException when connection error when fetching get capabilities document
137 * @throws WMSGetCapabilitiesException when there are errors when parsing get capabilities document
138 * @throws InvalidPathException if a Path object cannot be constructed for the capabilities cached file
139 */
140 public WMSImagery(String url) throws IOException, WMSGetCapabilitiesException {
141 this(url, null);
142 }
143
144 /**
145 * Make getCapabilities request towards given URL using headers
146 * @param url service url
147 * @param headers HTTP headers to be sent with request
148 * @throws IOException when connection error when fetching get capabilities document
149 * @throws WMSGetCapabilitiesException when there are errors when parsing get capabilities document
150 * @throws InvalidPathException if a Path object cannot be constructed for the capabilities cached file
151 */
152 public WMSImagery(String url, Map<String, String> headers) throws IOException, WMSGetCapabilitiesException {
153 if (headers != null) {
154 this.headers.putAll(headers);
155 }
156
157 IOException savedExc = null;
158 String workingAddress = null;
159 url_search:
160 for (String z: new String[]{
161 normalizeUrl(url),
162 url,
163 url + CAPABILITIES_QUERY_STRING,
164 }) {
165 for (String ver: new String[]{"", "&VERSION=1.3.0", "&VERSION=1.1.1"}) {
166 try {
167 attemptGetCapabilities(z + ver);
168 workingAddress = z;
169 calculateChildren();
170 // clear saved exception - we've got something working
171 savedExc = null;
172 break url_search;
173 } catch (IOException e) {
174 savedExc = e;
175 Logging.warn(e);
176 }
177 }
178 }
179
180 if (workingAddress != null) {
181 try {
182 capabilitiesUrl = new URL(workingAddress);
183 } catch (MalformedURLException e) {
184 if (savedExc == null) {
185 savedExc = e;
186 }
187 try {
188 capabilitiesUrl = new File(workingAddress).toURI().toURL();
189 } catch (MalformedURLException e1) { // NOPMD
190 // do nothing, raise original exception
191 Logging.trace(e1);
192 }
193 }
194 }
195
196 if (savedExc != null) {
197 throw savedExc;
198 }
199 }
200
201 private void calculateChildren() {
202 Map<LayerDetails, List<LayerDetails>> layerChildren = layers.stream()
203 .filter(x -> x.getParent() != null) // exclude top-level elements
204 .collect(Collectors.groupingBy(LayerDetails::getParent));
205 for (LayerDetails ld: layers) {
206 if (layerChildren.containsKey(ld)) {
207 ld.setChildren(layerChildren.get(ld));
208 }
209 }
210 // leave only top-most elements in the list
211 layers = layers.stream().filter(x -> x.getParent() == null).collect(Collectors.toCollection(ArrayList::new));
212 }
213
214 /**
215 * Returns the list of top-level layers.
216 * @return the list of top-level layers
217 */
218 public List<LayerDetails> getLayers() {
219 return Collections.unmodifiableList(layers);
220 }
221
222 /**
223 * Returns the list of supported formats.
224 * @return the list of supported formats
225 */
226 public Collection<String> getFormats() {
227 return Collections.unmodifiableList(formats);
228 }
229
230 /**
231 * Gets the preferred format for this imagery layer.
232 * @return The preferred format as mime type.
233 */
234 public String getPreferredFormat() {
235 if (formats.contains("image/png")) {
236 return "image/png";
237 } else if (formats.contains("image/jpeg")) {
238 return "image/jpeg";
239 } else if (formats.isEmpty()) {
240 return null;
241 } else {
242 return formats.get(0);
243 }
244 }
245
246 /**
247 * @return root URL of services in this GetCapabilities
248 */
249 public String buildRootUrl() {
250 if (getMapUrl == null && capabilitiesUrl == null) {
251 return null;
252 }
253 if (getMapUrl != null) {
254 return getMapUrl;
255 }
256
257 URL serviceUrl = capabilitiesUrl;
258 StringBuilder a = new StringBuilder(serviceUrl.getProtocol());
259 a.append("://").append(serviceUrl.getHost());
260 if (serviceUrl.getPort() != -1) {
261 a.append(':').append(serviceUrl.getPort());
262 }
263 a.append(serviceUrl.getPath()).append('?');
264 if (serviceUrl.getQuery() != null) {
265 a.append(serviceUrl.getQuery());
266 if (!serviceUrl.getQuery().isEmpty() && !serviceUrl.getQuery().endsWith("&")) {
267 a.append('&');
268 }
269 }
270 return a.toString();
271 }
272
273 /**
274 * @return root URL of services without the GetCapabilities call
275 * @since 15209
276 */
277 public String buildRootUrlWithoutCapabilities() {
278 return buildRootUrl()
279 .replace(CAPABILITIES_QUERY_STRING, "")
280 .replace(SERVICE_WMS, "")
281 .replace(REQUEST_GET_CAPABILITIES, "")
282 .replace("?&", "?");
283 }
284
285 /**
286 * Returns URL for accessing GetMap service. String will contain following parameters:
287 * * {proj} - that needs to be replaced with projection (one of {@link #getServerProjections(List)})
288 * * {width} - that needs to be replaced with width of the tile
289 * * {height} - that needs to be replaces with height of the tile
290 * * {bbox} - that needs to be replaced with area that should be fetched (in {proj} coordinates)
291 *
292 * Format of the response will be calculated using {@link #getPreferredFormat()}
293 *
294 * @param selectedLayers list of DefaultLayer selection of layers to be shown
295 * @param transparent whether returned images should contain transparent pixels (if supported by format)
296 * @return URL template for GetMap service containing
297 */
298 public String buildGetMapUrl(List<DefaultLayer> selectedLayers, boolean transparent) {
299 return buildGetMapUrl(
300 getLayers(selectedLayers),
301 selectedLayers.stream().map(DefaultLayer::getStyle).collect(Collectors.toList()),
302 transparent);
303 }
304
305 /**
306 * @param selectedLayers selected layers as subset of the tree returned by {@link #getLayers()}
307 * @param selectedStyles selected styles for all selectedLayers
308 * @param transparent whether returned images should contain transparent pixels (if supported by format)
309 * @return URL template for GetMap service
310 * @see #buildGetMapUrl(List, boolean)
311 */
312 public String buildGetMapUrl(List<LayerDetails> selectedLayers, List<String> selectedStyles, boolean transparent) {
313 return buildGetMapUrl(selectedLayers, selectedStyles, getPreferredFormat(), transparent);
314 }
315
316 /**
317 * @param selectedLayers selected layers as subset of the tree returned by {@link #getLayers()}
318 * @param selectedStyles selected styles for all selectedLayers
319 * @param format format of the response - one of {@link #getFormats()}
320 * @param transparent whether returned images should contain transparent pixels (if supported by format)
321 * @return URL template for GetMap service
322 * @see #buildGetMapUrl(List, boolean)
323 * @since 15228
324 */
325 public String buildGetMapUrl(List<LayerDetails> selectedLayers, List<String> selectedStyles, String format, boolean transparent) {
326 return buildGetMapUrl(
327 selectedLayers.stream().map(LayerDetails::getName).collect(Collectors.toList()),
328 selectedStyles,
329 format,
330 transparent);
331 }
332
333 /**
334 * @param selectedLayers selected layers as list of strings
335 * @param selectedStyles selected styles of layers as list of strings
336 * @param format format of the response - one of {@link #getFormats()}
337 * @param transparent whether returned images should contain transparent pixels (if supported by format)
338 * @return URL template for GetMap service
339 * @see #buildGetMapUrl(List, boolean)
340 */
341 public String buildGetMapUrl(List<String> selectedLayers,
342 Collection<String> selectedStyles,
343 String format,
344 boolean transparent) {
345
346 Utils.ensure(selectedStyles == null || selectedLayers.size() == selectedStyles.size(),
347 tr("Styles size {0} does not match layers size {1}"),
348 selectedStyles == null ? 0 : selectedStyles.size(),
349 selectedLayers.size());
350
351 return buildRootUrlWithoutCapabilities()
352 + "FORMAT=" + format + ((imageFormatHasTransparency(format) && transparent) ? "&TRANSPARENT=TRUE" : "")
353 + "&VERSION=" + this.version + "&" + SERVICE_WMS + "&REQUEST=GetMap&LAYERS="
354 + String.join(",", selectedLayers)
355 + "&STYLES="
356 + (selectedStyles != null ? String.join(",", selectedStyles) : "")
357 + "&"
358 + (belowWMS130() ? "SRS" : "CRS")
359 + "={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}";
360 }
361
362 private boolean tagEquals(QName a, QName b) {
363 boolean ret = a.equals(b);
364 if (ret) {
365 return ret;
366 }
367
368 if (belowWMS130()) {
369 return a.getLocalPart().equals(b.getLocalPart());
370 }
371
372 return false;
373 }
374
375 private void attemptGetCapabilities(String url) throws IOException, WMSGetCapabilitiesException {
376 Logging.debug("Trying WMS getcapabilities with url {0}", url);
377 try (CachedFile cf = new CachedFile(url); InputStream in = cf.setHttpHeaders(headers).
378 setMaxAge(7 * CachedFile.DAYS).
379 setCachingStrategy(CachedFile.CachingStrategy.IfModifiedSince).
380 getInputStream()) {
381
382 try {
383 XMLStreamReader reader = GetCapabilitiesParseHelper.getReader(in);
384 for (int event = reader.getEventType(); reader.hasNext(); event = reader.next()) {
385 if (event == XMLStreamReader.START_ELEMENT) {
386 if (tagEquals(CAPABILITIES_ROOT_111, reader.getName())) {
387 // version 1.1.1
388 this.version = reader.getAttributeValue(null, "version");
389 if (this.version == null) {
390 this.version = "1.1.1";
391 }
392 }
393 if (tagEquals(CAPABILITITES_ROOT_130, reader.getName())) {
394 this.version = reader.getAttributeValue(WMS_NS_URL, "version");
395 }
396 if (tagEquals(QN_SERVICE, reader.getName())) {
397 parseService(reader);
398 }
399
400 if (tagEquals(QN_CAPABILITY, reader.getName())) {
401 parseCapability(reader);
402 }
403 }
404 }
405 } catch (XMLStreamException e) {
406 String content = new String(cf.getByteContent(), UTF_8);
407 cf.clear(); // if there is a problem with parsing of the file, remove it from the cache
408 throw new WMSGetCapabilitiesException(e, content);
409 }
410 }
411 }
412
413 private void parseService(XMLStreamReader reader) throws XMLStreamException {
414 if (GetCapabilitiesParseHelper.moveReaderToTag(reader, this::tagEquals, QN_TITLE)) {
415 this.title = reader.getElementText();
416 // CHECKSTYLE.OFF: EmptyBlock
417 for (int event = reader.getEventType();
418 reader.hasNext() && !(event == XMLStreamReader.END_ELEMENT && tagEquals(QN_SERVICE, reader.getName()));
419 event = reader.next()) {
420 // empty loop, just move reader to the end of Service tag, if moveReaderToTag return false, it's already done
421 }
422 // CHECKSTYLE.ON: EmptyBlock
423 }
424 }
425
426 private void parseCapability(XMLStreamReader reader) throws XMLStreamException {
427 for (int event = reader.getEventType();
428 reader.hasNext() && !(event == XMLStreamReader.END_ELEMENT && tagEquals(QN_CAPABILITY, reader.getName()));
429 event = reader.next()) {
430
431 if (event == XMLStreamReader.START_ELEMENT) {
432 if (tagEquals(QN_REQUEST, reader.getName())) {
433 parseRequest(reader);
434 }
435 if (tagEquals(QN_LAYER, reader.getName())) {
436 parseLayer(reader, null);
437 }
438 }
439 }
440 }
441
442 private void parseRequest(XMLStreamReader reader) throws XMLStreamException {
443 String mode = "";
444 String getMapUrl = "";
445 if (GetCapabilitiesParseHelper.moveReaderToTag(reader, this::tagEquals, QN_GETMAP)) {
446 for (int event = reader.getEventType();
447 reader.hasNext() && !(event == XMLStreamReader.END_ELEMENT && tagEquals(QN_GETMAP, reader.getName()));
448 event = reader.next()) {
449
450 if (event == XMLStreamReader.START_ELEMENT) {
451 if (tagEquals(QN_FORMAT, reader.getName())) {
452 String value = reader.getElementText();
453 if (isImageFormatSupportedWarn(value) && !this.formats.contains(value)) {
454 this.formats.add(value);
455 }
456 }
457 if (tagEquals(QN_DCPTYPE, reader.getName()) && GetCapabilitiesParseHelper.moveReaderToTag(reader,
458 this::tagEquals, QN_HTTP, QN_GET)) {
459 mode = reader.getName().getLocalPart();
460 if (GetCapabilitiesParseHelper.moveReaderToTag(reader, this::tagEquals, QN_ONLINE_RESOURCE)) {
461 getMapUrl = reader.getAttributeValue(GetCapabilitiesParseHelper.XLINK_NS_URL, "href");
462 }
463 // TODO should we handle also POST?
464 if ("GET".equalsIgnoreCase(mode) && getMapUrl != null && !"".equals(getMapUrl)) {
465 try {
466 String query = (new URL(getMapUrl)).getQuery();
467 if (query == null) {
468 this.getMapUrl = getMapUrl + "?";
469 } else {
470 this.getMapUrl = getMapUrl;
471 }
472 } catch (MalformedURLException e) {
473 throw new XMLStreamException(e);
474 }
475 }
476 }
477 }
478 }
479 }
480 }
481
482 private void parseLayer(XMLStreamReader reader, LayerDetails parentLayer) throws XMLStreamException {
483 LayerDetails ret = new LayerDetails(parentLayer);
484 for (int event = reader.next(); // start with advancing reader by one element to get the contents of the layer
485 reader.hasNext() && !(event == XMLStreamReader.END_ELEMENT && tagEquals(QN_LAYER, reader.getName()));
486 event = reader.next()) {
487
488 if (event == XMLStreamReader.START_ELEMENT) {
489 if (tagEquals(QN_NAME, reader.getName())) {
490 ret.setName(reader.getElementText());
491 } else if (tagEquals(QN_ABSTRACT, reader.getName())) {
492 ret.setAbstract(GetCapabilitiesParseHelper.getElementTextWithSubtags(reader));
493 } else if (tagEquals(QN_TITLE, reader.getName())) {
494 ret.setTitle(reader.getElementText());
495 } else if (tagEquals(QN_CRS, reader.getName())) {
496 ret.addCrs(reader.getElementText());
497 } else if (tagEquals(QN_SRS, reader.getName()) && belowWMS130()) {
498 ret.addCrs(reader.getElementText());
499 } else if (tagEquals(QN_STYLE, reader.getName())) {
500 parseAndAddStyle(reader, ret);
501 } else if (tagEquals(QN_LAYER, reader.getName())) {
502 parseLayer(reader, ret);
503 } else if (tagEquals(QN_EX_GEOGRAPHIC_BBOX, reader.getName()) && ret.getBounds() == null) {
504 ret.setBounds(parseExGeographic(reader));
505 } else if (tagEquals(QN_BOUNDINGBOX, reader.getName())) {
506 Projection conv;
507 if (belowWMS130()) {
508 conv = Projections.getProjectionByCode(reader.getAttributeValue(WMS_NS_URL, "SRS"));
509 } else {
510 conv = Projections.getProjectionByCode(reader.getAttributeValue(WMS_NS_URL, "CRS"));
511 }
512 if (ret.getBounds() == null && conv != null) {
513 ret.setBounds(parseBoundingBox(reader, conv));
514 }
515 } else if (tagEquals(QN_LATLONBOUNDINGBOX, reader.getName()) && belowWMS130() && ret.getBounds() == null) {
516 ret.setBounds(parseBoundingBox(reader, null));
517 } else {
518 // unknown tag, move to its end as it may have child elements
519 GetCapabilitiesParseHelper.moveReaderToEndCurrentTag(reader);
520 }
521 }
522 }
523 this.layers.add(ret);
524 }
525
526 /**
527 * @return if this service operates at protocol level below 1.3.0
528 */
529 public boolean belowWMS130() {
530 return "1.1.1".equals(version) || "1.1".equals(version) || "1.0".equals(version);
531 }
532
533 private void parseAndAddStyle(XMLStreamReader reader, LayerDetails ld) throws XMLStreamException {
534 String name = null;
535 String title = null;
536 for (int event = reader.getEventType();
537 reader.hasNext() && !(event == XMLStreamReader.END_ELEMENT && tagEquals(QN_STYLE, reader.getName()));
538 event = reader.next()) {
539 if (event == XMLStreamReader.START_ELEMENT) {
540 if (tagEquals(QN_NAME, reader.getName())) {
541 name = reader.getElementText();
542 }
543 if (tagEquals(QN_TITLE, reader.getName())) {
544 title = reader.getElementText();
545 }
546 }
547 }
548 if (name == null) {
549 name = "";
550 }
551 ld.addStyle(name, title);
552 }
553
554 private Bounds parseExGeographic(XMLStreamReader reader) throws XMLStreamException {
555 String minx = null, maxx = null, maxy = null, miny = null;
556
557 for (int event = reader.getEventType();
558 reader.hasNext() && !(event == XMLStreamReader.END_ELEMENT && tagEquals(QN_EX_GEOGRAPHIC_BBOX, reader.getName()));
559 event = reader.next()) {
560 if (event == XMLStreamReader.START_ELEMENT) {
561 if (tagEquals(QN_WESTBOUNDLONGITUDE, reader.getName())) {
562 minx = reader.getElementText();
563 }
564
565 if (tagEquals(QN_EASTBOUNDLONGITUDE, reader.getName())) {
566 maxx = reader.getElementText();
567 }
568
569 if (tagEquals(QN_SOUTHBOUNDLATITUDE, reader.getName())) {
570 miny = reader.getElementText();
571 }
572
573 if (tagEquals(QN_NORTHBOUNDLATITUDE, reader.getName())) {
574 maxy = reader.getElementText();
575 }
576 }
577 }
578 return parseBBox(null, miny, minx, maxy, maxx);
579 }
580
581 private Bounds parseBoundingBox(XMLStreamReader reader, Projection conv) {
582 UnaryOperator<String> attrGetter = tag -> belowWMS130() ?
583 reader.getAttributeValue(null, tag)
584 : reader.getAttributeValue(WMS_NS_URL, tag);
585
586 return parseBBox(
587 conv,
588 attrGetter.apply("miny"),
589 attrGetter.apply("minx"),
590 attrGetter.apply("maxy"),
591 attrGetter.apply("maxx")
592 );
593 }
594
595 private static Bounds parseBBox(Projection conv, String miny, String minx, String maxy, String maxx) {
596 if (miny == null || minx == null || maxy == null || maxx == null) {
597 return null;
598 }
599 if (conv != null) {
600 return new Bounds(
601 conv.eastNorth2latlon(new EastNorth(getDecimalDegree(minx), getDecimalDegree(miny))),
602 conv.eastNorth2latlon(new EastNorth(getDecimalDegree(maxx), getDecimalDegree(maxy)))
603 );
604 }
605 return new Bounds(
606 getDecimalDegree(miny),
607 getDecimalDegree(minx),
608 getDecimalDegree(maxy),
609 getDecimalDegree(maxx)
610 );
611 }
612
613 private static double getDecimalDegree(String value) {
614 // Some real-world WMS servers use a comma instead of a dot as decimal separator (seen in Polish WMS server)
615 return Double.parseDouble(value.replace(',', '.'));
616 }
617
618 private static String normalizeUrl(String serviceUrlStr) throws MalformedURLException {
619 URL getCapabilitiesUrl = null;
620 String ret = null;
621
622 if (!Pattern.compile(".*GetCapabilities.*", Pattern.CASE_INSENSITIVE).matcher(serviceUrlStr).matches()) {
623 // If the url doesn't already have GetCapabilities, add it in
624 getCapabilitiesUrl = new URL(serviceUrlStr);
625 if (getCapabilitiesUrl.getQuery() == null) {
626 ret = serviceUrlStr + '?' + CAPABILITIES_QUERY_STRING;
627 } else if (!getCapabilitiesUrl.getQuery().isEmpty() && !getCapabilitiesUrl.getQuery().endsWith("&")) {
628 ret = serviceUrlStr + '&' + CAPABILITIES_QUERY_STRING;
629 } else {
630 ret = serviceUrlStr + CAPABILITIES_QUERY_STRING;
631 }
632 } else {
633 // Otherwise assume it's a good URL and let the subsequent error
634 // handling systems deal with problems
635 ret = serviceUrlStr;
636 }
637 return ret;
638 }
639
640 private static boolean isImageFormatSupportedWarn(String format) {
641 boolean isFormatSupported = isImageFormatSupported(format);
642 if (!isFormatSupported) {
643 Logging.info("Skipping unsupported image format {0}", format);
644 }
645 return isFormatSupported;
646 }
647
648 static boolean isImageFormatSupported(final String format) {
649 return ImageIO.getImageReadersByMIMEType(format).hasNext()
650 // handles image/tiff image/tiff8 image/geotiff image/geotiff8
651 || isImageFormatSupported(format, "tiff", "geotiff")
652 || isImageFormatSupported(format, "png")
653 || isImageFormatSupported(format, "svg")
654 || isImageFormatSupported(format, "bmp");
655 }
656
657 static boolean isImageFormatSupported(String format, String... mimeFormats) {
658 for (String mime : mimeFormats) {
659 if (format.startsWith("image/" + mime)) {
660 return ImageIO.getImageReadersBySuffix(mimeFormats[0]).hasNext();
661 }
662 }
663 return false;
664 }
665
666 static boolean imageFormatHasTransparency(final String format) {
667 return format != null && (format.startsWith("image/png") || format.startsWith("image/gif")
668 || format.startsWith("image/svg") || format.startsWith("image/tiff"));
669 }
670
671 /**
672 * Creates ImageryInfo object from this GetCapabilities document
673 *
674 * @param name name of imagery layer
675 * @param selectedLayers layers which are to be used by this imagery layer
676 * @param selectedStyles styles that should be used for selectedLayers
677 * @param format format of the response - one of {@link #getFormats()}
678 * @param transparent if layer should be transparent
679 * @return ImageryInfo object
680 * @since 15228
681 */
682 public ImageryInfo toImageryInfo(
683 String name, List<LayerDetails> selectedLayers, List<String> selectedStyles, String format, boolean transparent) {
684 ImageryInfo i = new ImageryInfo(name, buildGetMapUrl(selectedLayers, selectedStyles, format, transparent));
685 if (selectedLayers != null && !selectedLayers.isEmpty()) {
686 i.setServerProjections(getServerProjections(selectedLayers));
687 }
688 return i;
689 }
690
691 /**
692 * Returns projections that server supports for provided list of layers. This will be intersection of projections
693 * defined for each layer
694 *
695 * @param selectedLayers list of layers
696 * @return projection code
697 */
698 public Collection<String> getServerProjections(List<LayerDetails> selectedLayers) {
699 if (selectedLayers.isEmpty()) {
700 return Collections.emptyList();
701 }
702 Set<String> proj = new HashSet<>(selectedLayers.get(0).getCrs());
703
704 // set intersect with all layers
705 for (LayerDetails ld: selectedLayers) {
706 proj.retainAll(ld.getCrs());
707 }
708 return proj;
709 }
710
711 /**
712 * @param defaultLayers default layers that should select layer object
713 * @return collection of LayerDetails specified by DefaultLayers
714 */
715 public List<LayerDetails> getLayers(List<DefaultLayer> defaultLayers) {
716 Collection<String> layerNames = defaultLayers.stream().map(DefaultLayer::getLayerName).collect(Collectors.toList());
717 return layers.stream()
718 .flatMap(LayerDetails::flattened)
719 .filter(x -> layerNames.contains(x.getName()))
720 .collect(Collectors.toList());
721 }
722
723 /**
724 * @return title of this service
725 */
726 public String getTitle() {
727 return title;
728 }
729}
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