1 | // License: GPL. For details, see LICENSE file.
|
---|
2 | package org.openstreetmap.josm.io;
|
---|
3 |
|
---|
4 | import static org.openstreetmap.josm.tools.I18n.tr;
|
---|
5 | import static org.openstreetmap.josm.tools.I18n.trn;
|
---|
6 |
|
---|
7 | import java.io.IOException;
|
---|
8 | import java.io.InputStream;
|
---|
9 | import java.net.HttpURLConnection;
|
---|
10 | import java.util.ArrayList;
|
---|
11 | import java.util.Collection;
|
---|
12 | import java.util.HashSet;
|
---|
13 | import java.util.Iterator;
|
---|
14 | import java.util.LinkedHashSet;
|
---|
15 | import java.util.List;
|
---|
16 | import java.util.Set;
|
---|
17 | import java.util.concurrent.Callable;
|
---|
18 | import java.util.concurrent.CompletionService;
|
---|
19 | import java.util.concurrent.ExecutionException;
|
---|
20 | import java.util.concurrent.Executor;
|
---|
21 | import java.util.concurrent.ExecutorCompletionService;
|
---|
22 | import java.util.concurrent.Executors;
|
---|
23 | import java.util.concurrent.Future;
|
---|
24 |
|
---|
25 | import org.openstreetmap.josm.Main;
|
---|
26 | import org.openstreetmap.josm.data.osm.DataSet;
|
---|
27 | import org.openstreetmap.josm.data.osm.DataSetMerger;
|
---|
28 | import org.openstreetmap.josm.data.osm.Node;
|
---|
29 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
|
---|
30 | import org.openstreetmap.josm.data.osm.OsmPrimitiveType;
|
---|
31 | import org.openstreetmap.josm.data.osm.PrimitiveId;
|
---|
32 | import org.openstreetmap.josm.data.osm.Relation;
|
---|
33 | import org.openstreetmap.josm.data.osm.RelationMember;
|
---|
34 | import org.openstreetmap.josm.data.osm.SimplePrimitiveId;
|
---|
35 | import org.openstreetmap.josm.data.osm.Way;
|
---|
36 | import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
|
---|
37 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
|
---|
38 | import org.openstreetmap.josm.tools.Utils;
|
---|
39 |
|
---|
40 | /**
|
---|
41 | * Retrieves a set of {@link OsmPrimitive}s from an OSM server using the so called
|
---|
42 | * Multi Fetch API.
|
---|
43 | *
|
---|
44 | * Usage:
|
---|
45 | * <pre>
|
---|
46 | * MultiFetchServerObjectReader reader = MultiFetchServerObjectReader()
|
---|
47 | * .append(2345,2334,4444)
|
---|
48 | * .append(new Node(72343));
|
---|
49 | * reader.parseOsm();
|
---|
50 | * if (!reader.getMissingPrimitives().isEmpty()) {
|
---|
51 | * Main.info("There are missing primitives: " + reader.getMissingPrimitives());
|
---|
52 | * }
|
---|
53 | * if (!reader.getSkippedWays().isEmpty()) {
|
---|
54 | * Main.info("There are skipped ways: " + reader.getMissingPrimitives());
|
---|
55 | * }
|
---|
56 | * </pre>
|
---|
57 | */
|
---|
58 | public class MultiFetchServerObjectReader extends OsmServerReader {
|
---|
59 | /**
|
---|
60 | * the max. number of primitives retrieved in one step. Assuming IDs with 7 digits,
|
---|
61 | * this leads to a max. request URL of ~ 1600 Bytes ((7 digits + 1 Separator) * 200),
|
---|
62 | * which should be safe according to the
|
---|
63 | * <a href="http://www.boutell.com/newfaq/misc/urllength.html">WWW FAQ</a>.
|
---|
64 | */
|
---|
65 | private static final int MAX_IDS_PER_REQUEST = 200;
|
---|
66 |
|
---|
67 | private Set<Long> nodes;
|
---|
68 | private Set<Long> ways;
|
---|
69 | private Set<Long> relations;
|
---|
70 | private Set<PrimitiveId> missingPrimitives;
|
---|
71 | private DataSet outputDataSet;
|
---|
72 |
|
---|
73 | /**
|
---|
74 | * Constructs a {@code MultiFetchServerObjectReader}.
|
---|
75 | */
|
---|
76 | public MultiFetchServerObjectReader() {
|
---|
77 | nodes = new LinkedHashSet<>();
|
---|
78 | ways = new LinkedHashSet<>();
|
---|
79 | relations = new LinkedHashSet<>();
|
---|
80 | this.outputDataSet = new DataSet();
|
---|
81 | this.missingPrimitives = new LinkedHashSet<>();
|
---|
82 | }
|
---|
83 |
|
---|
84 | /**
|
---|
85 | * Remembers an {@link OsmPrimitive}'s id. The id will
|
---|
86 | * later be fetched as part of a Multi Get request.
|
---|
87 | *
|
---|
88 | * Ignore the id if it represents a new primitives.
|
---|
89 | *
|
---|
90 | * @param id the id
|
---|
91 | */
|
---|
92 | protected void remember(PrimitiveId id) {
|
---|
93 | if (id.isNew()) return;
|
---|
94 | switch(id.getType()) {
|
---|
95 | case NODE: nodes.add(id.getUniqueId()); break;
|
---|
96 | case WAY: ways.add(id.getUniqueId()); break;
|
---|
97 | case RELATION: relations.add(id.getUniqueId()); break;
|
---|
98 | }
|
---|
99 | }
|
---|
100 |
|
---|
101 | /**
|
---|
102 | * appends a {@link OsmPrimitive} id to the list of ids which will be fetched from the server.
|
---|
103 | *
|
---|
104 | * @param ds the {@link DataSet} to which the primitive belongs
|
---|
105 | * @param id the primitive id
|
---|
106 | * @param type The primitive type. Must be one of {@link OsmPrimitiveType#NODE NODE}, {@link OsmPrimitiveType#WAY WAY},
|
---|
107 | * {@link OsmPrimitiveType#RELATION RELATION}
|
---|
108 | * @return this
|
---|
109 | */
|
---|
110 | public MultiFetchServerObjectReader append(DataSet ds, long id, OsmPrimitiveType type) {
|
---|
111 | OsmPrimitive p = ds.getPrimitiveById(id, type);
|
---|
112 | switch(type) {
|
---|
113 | case NODE:
|
---|
114 | return appendNode((Node) p);
|
---|
115 | case WAY:
|
---|
116 | return appendWay((Way) p);
|
---|
117 | case RELATION:
|
---|
118 | return appendRelation((Relation) p);
|
---|
119 | }
|
---|
120 | return this;
|
---|
121 | }
|
---|
122 |
|
---|
123 | /**
|
---|
124 | * appends a {@link Node} id to the list of ids which will be fetched from the server.
|
---|
125 | *
|
---|
126 | * @param node the node (ignored, if null)
|
---|
127 | * @return this
|
---|
128 | */
|
---|
129 | public MultiFetchServerObjectReader appendNode(Node node) {
|
---|
130 | if (node == null) return this;
|
---|
131 | remember(node.getPrimitiveId());
|
---|
132 | return this;
|
---|
133 | }
|
---|
134 |
|
---|
135 | /**
|
---|
136 | * appends a {@link Way} id and the list of ids of nodes the way refers to the list of ids which will be fetched from the server.
|
---|
137 | *
|
---|
138 | * @param way the way (ignored, if null)
|
---|
139 | * @return this
|
---|
140 | */
|
---|
141 | public MultiFetchServerObjectReader appendWay(Way way) {
|
---|
142 | if (way == null) return this;
|
---|
143 | if (way.isNew()) return this;
|
---|
144 | for (Node node: way.getNodes()) {
|
---|
145 | if (!node.isNew()) {
|
---|
146 | remember(node.getPrimitiveId());
|
---|
147 | }
|
---|
148 | }
|
---|
149 | remember(way.getPrimitiveId());
|
---|
150 | return this;
|
---|
151 | }
|
---|
152 |
|
---|
153 | /**
|
---|
154 | * appends a {@link Relation} id to the list of ids which will be fetched from the server.
|
---|
155 | *
|
---|
156 | * @param relation the relation (ignored, if null)
|
---|
157 | * @return this
|
---|
158 | */
|
---|
159 | protected MultiFetchServerObjectReader appendRelation(Relation relation) {
|
---|
160 | if (relation == null) return this;
|
---|
161 | if (relation.isNew()) return this;
|
---|
162 | remember(relation.getPrimitiveId());
|
---|
163 | for (RelationMember member : relation.getMembers()) {
|
---|
164 | if (OsmPrimitiveType.from(member.getMember()).equals(OsmPrimitiveType.RELATION)) {
|
---|
165 | // avoid infinite recursion in case of cyclic dependencies in relations
|
---|
166 | //
|
---|
167 | if (relations.contains(member.getMember().getId())) {
|
---|
168 | continue;
|
---|
169 | }
|
---|
170 | }
|
---|
171 | if (!member.getMember().isIncomplete()) {
|
---|
172 | append(member.getMember());
|
---|
173 | }
|
---|
174 | }
|
---|
175 | return this;
|
---|
176 | }
|
---|
177 |
|
---|
178 | /**
|
---|
179 | * appends an {@link OsmPrimitive} to the list of ids which will be fetched from the server.
|
---|
180 | * @param primitive the primitive
|
---|
181 | * @return this
|
---|
182 | */
|
---|
183 | public MultiFetchServerObjectReader append(OsmPrimitive primitive) {
|
---|
184 | if (primitive != null) {
|
---|
185 | switch (OsmPrimitiveType.from(primitive)) {
|
---|
186 | case NODE: return appendNode((Node) primitive);
|
---|
187 | case WAY: return appendWay((Way) primitive);
|
---|
188 | case RELATION: return appendRelation((Relation) primitive);
|
---|
189 | }
|
---|
190 | }
|
---|
191 | return this;
|
---|
192 | }
|
---|
193 |
|
---|
194 | /**
|
---|
195 | * appends a list of {@link OsmPrimitive} to the list of ids which will be fetched from the server.
|
---|
196 | *
|
---|
197 | * @param primitives the list of primitives (ignored, if null)
|
---|
198 | * @return this
|
---|
199 | *
|
---|
200 | * @see #append(OsmPrimitive)
|
---|
201 | */
|
---|
202 | public MultiFetchServerObjectReader append(Collection<? extends OsmPrimitive> primitives) {
|
---|
203 | if (primitives == null) return this;
|
---|
204 | for (OsmPrimitive primitive : primitives) {
|
---|
205 | append(primitive);
|
---|
206 | }
|
---|
207 | return this;
|
---|
208 | }
|
---|
209 |
|
---|
210 | /**
|
---|
211 | * extracts a subset of max {@link #MAX_IDS_PER_REQUEST} ids from <code>ids</code> and
|
---|
212 | * replies the subset. The extracted subset is removed from <code>ids</code>.
|
---|
213 | *
|
---|
214 | * @param ids a set of ids
|
---|
215 | * @return the subset of ids
|
---|
216 | */
|
---|
217 | protected Set<Long> extractIdPackage(Set<Long> ids) {
|
---|
218 | Set<Long> pkg = new HashSet<>();
|
---|
219 | if (ids.isEmpty())
|
---|
220 | return pkg;
|
---|
221 | if (ids.size() > MAX_IDS_PER_REQUEST) {
|
---|
222 | Iterator<Long> it = ids.iterator();
|
---|
223 | for (int i = 0; i < MAX_IDS_PER_REQUEST; i++) {
|
---|
224 | pkg.add(it.next());
|
---|
225 | }
|
---|
226 | ids.removeAll(pkg);
|
---|
227 | } else {
|
---|
228 | pkg.addAll(ids);
|
---|
229 | ids.clear();
|
---|
230 | }
|
---|
231 | return pkg;
|
---|
232 | }
|
---|
233 |
|
---|
234 | /**
|
---|
235 | * builds the Multi Get request string for a set of ids and a given {@link OsmPrimitiveType}.
|
---|
236 | *
|
---|
237 | * @param type The primitive type. Must be one of {@link OsmPrimitiveType#NODE NODE}, {@link OsmPrimitiveType#WAY WAY},
|
---|
238 | * {@link OsmPrimitiveType#RELATION RELATION}
|
---|
239 | * @param idPackage the package of ids
|
---|
240 | * @return the request string
|
---|
241 | */
|
---|
242 | protected static String buildRequestString(OsmPrimitiveType type, Set<Long> idPackage) {
|
---|
243 | StringBuilder sb = new StringBuilder();
|
---|
244 | sb.append(type.getAPIName()).append("s?")
|
---|
245 | .append(type.getAPIName()).append("s=");
|
---|
246 |
|
---|
247 | Iterator<Long> it = idPackage.iterator();
|
---|
248 | for (int i = 0; i < idPackage.size(); i++) {
|
---|
249 | sb.append(it.next());
|
---|
250 | if (i < idPackage.size()-1) {
|
---|
251 | sb.append(',');
|
---|
252 | }
|
---|
253 | }
|
---|
254 | return sb.toString();
|
---|
255 | }
|
---|
256 |
|
---|
257 | /**
|
---|
258 | * builds the Multi Get request string for a single id and a given {@link OsmPrimitiveType}.
|
---|
259 | *
|
---|
260 | * @param type The primitive type. Must be one of {@link OsmPrimitiveType#NODE NODE}, {@link OsmPrimitiveType#WAY WAY},
|
---|
261 | * {@link OsmPrimitiveType#RELATION RELATION}
|
---|
262 | * @param id the id
|
---|
263 | * @return the request string
|
---|
264 | */
|
---|
265 | protected static String buildRequestString(OsmPrimitiveType type, long id) {
|
---|
266 | StringBuilder sb = new StringBuilder();
|
---|
267 | sb.append(type.getAPIName()).append("s?")
|
---|
268 | .append(type.getAPIName()).append("s=")
|
---|
269 | .append(id);
|
---|
270 | return sb.toString();
|
---|
271 | }
|
---|
272 |
|
---|
273 | protected void rememberNodesOfIncompleteWaysToLoad(DataSet from) {
|
---|
274 | for (Way w: from.getWays()) {
|
---|
275 | if (w.hasIncompleteNodes()) {
|
---|
276 | for (Node n: w.getNodes()) {
|
---|
277 | if (n.isIncomplete()) {
|
---|
278 | nodes.add(n.getId());
|
---|
279 | }
|
---|
280 | }
|
---|
281 | }
|
---|
282 | }
|
---|
283 | }
|
---|
284 |
|
---|
285 | /**
|
---|
286 | * merges the dataset <code>from</code> to {@link #outputDataSet}.
|
---|
287 | *
|
---|
288 | * @param from the other dataset
|
---|
289 | */
|
---|
290 | protected void merge(DataSet from) {
|
---|
291 | final DataSetMerger visitor = new DataSetMerger(outputDataSet, from);
|
---|
292 | visitor.merge();
|
---|
293 | }
|
---|
294 |
|
---|
295 | /**
|
---|
296 | * fetches a set of ids of a given {@link OsmPrimitiveType} from the server
|
---|
297 | *
|
---|
298 | * @param ids the set of ids
|
---|
299 | * @param type The primitive type. Must be one of {@link OsmPrimitiveType#NODE NODE}, {@link OsmPrimitiveType#WAY WAY},
|
---|
300 | * {@link OsmPrimitiveType#RELATION RELATION}
|
---|
301 | * @throws OsmTransferException if an error occurs while communicating with the API server
|
---|
302 | */
|
---|
303 | protected void fetchPrimitives(Set<Long> ids, OsmPrimitiveType type, ProgressMonitor progressMonitor) throws OsmTransferException {
|
---|
304 | String msg = "";
|
---|
305 | String baseUrl = OsmApi.getOsmApi().getBaseUrl();
|
---|
306 | switch (type) {
|
---|
307 | case NODE: msg = tr("Fetching a package of nodes from ''{0}''", baseUrl); break;
|
---|
308 | case WAY: msg = tr("Fetching a package of ways from ''{0}''", baseUrl); break;
|
---|
309 | case RELATION: msg = tr("Fetching a package of relations from ''{0}''", baseUrl); break;
|
---|
310 | }
|
---|
311 | progressMonitor.setTicksCount(ids.size());
|
---|
312 | progressMonitor.setTicks(0);
|
---|
313 | // The complete set containing all primitives to fetch
|
---|
314 | Set<Long> toFetch = new HashSet<>(ids);
|
---|
315 | // Build a list of fetchers that will download smaller sets containing only MAX_IDS_PER_REQUEST (200) primitives each.
|
---|
316 | // we will run up to MAX_DOWNLOAD_THREADS concurrent fetchers.
|
---|
317 | int threadsNumber = Main.pref.getInteger("osm.download.threads", OsmApi.MAX_DOWNLOAD_THREADS);
|
---|
318 | threadsNumber = Math.min(Math.max(threadsNumber, 1), OsmApi.MAX_DOWNLOAD_THREADS);
|
---|
319 | Executor exec = Executors.newFixedThreadPool(threadsNumber, Utils.newThreadFactory(getClass() + "-%d", Thread.NORM_PRIORITY));
|
---|
320 | CompletionService<FetchResult> ecs = new ExecutorCompletionService<>(exec);
|
---|
321 | List<Future<FetchResult>> jobs = new ArrayList<>();
|
---|
322 | while (!toFetch.isEmpty()) {
|
---|
323 | jobs.add(ecs.submit(new Fetcher(type, extractIdPackage(toFetch), progressMonitor)));
|
---|
324 | }
|
---|
325 | // Run the fetchers
|
---|
326 | for (int i = 0; i < jobs.size() && !isCanceled(); i++) {
|
---|
327 | progressMonitor.subTask(msg + "... " + progressMonitor.getTicks() + '/' + progressMonitor.getTicksCount());
|
---|
328 | try {
|
---|
329 | FetchResult result = ecs.take().get();
|
---|
330 | if (result.missingPrimitives != null) {
|
---|
331 | missingPrimitives.addAll(result.missingPrimitives);
|
---|
332 | }
|
---|
333 | if (result.dataSet != null && !isCanceled()) {
|
---|
334 | rememberNodesOfIncompleteWaysToLoad(result.dataSet);
|
---|
335 | merge(result.dataSet);
|
---|
336 | }
|
---|
337 | } catch (InterruptedException | ExecutionException e) {
|
---|
338 | Main.error(e);
|
---|
339 | }
|
---|
340 | }
|
---|
341 | // Cancel requests if the user choosed to
|
---|
342 | if (isCanceled()) {
|
---|
343 | for (Future<FetchResult> job : jobs) {
|
---|
344 | job.cancel(true);
|
---|
345 | }
|
---|
346 | }
|
---|
347 | }
|
---|
348 |
|
---|
349 | /**
|
---|
350 | * invokes one or more Multi Gets to fetch the {@link OsmPrimitive}s and replies
|
---|
351 | * the dataset of retrieved primitives. Note that the dataset includes non visible primitives too!
|
---|
352 | * In contrast to a simple Get for a node, a way, or a relation, a Multi Get always replies
|
---|
353 | * the latest version of the primitive (if any), even if the primitive is not visible (i.e. if
|
---|
354 | * visible==false).
|
---|
355 | *
|
---|
356 | * Invoke {@link #getMissingPrimitives()} to get a list of primitives which have not been
|
---|
357 | * found on the server (the server response code was 404)
|
---|
358 | *
|
---|
359 | * @return the parsed data
|
---|
360 | * @throws OsmTransferException if an error occurs while communicating with the API server
|
---|
361 | * @see #getMissingPrimitives()
|
---|
362 | *
|
---|
363 | */
|
---|
364 | @Override
|
---|
365 | public DataSet parseOsm(ProgressMonitor progressMonitor) throws OsmTransferException {
|
---|
366 | int n = nodes.size() + ways.size() + relations.size();
|
---|
367 | progressMonitor.beginTask(trn("Downloading {0} object from ''{1}''",
|
---|
368 | "Downloading {0} objects from ''{1}''", n, n, OsmApi.getOsmApi().getBaseUrl()));
|
---|
369 | try {
|
---|
370 | missingPrimitives = new HashSet<>();
|
---|
371 | if (isCanceled()) return null;
|
---|
372 | fetchPrimitives(ways, OsmPrimitiveType.WAY, progressMonitor);
|
---|
373 | if (isCanceled()) return null;
|
---|
374 | fetchPrimitives(nodes, OsmPrimitiveType.NODE, progressMonitor);
|
---|
375 | if (isCanceled()) return null;
|
---|
376 | fetchPrimitives(relations, OsmPrimitiveType.RELATION, progressMonitor);
|
---|
377 | if (outputDataSet != null) {
|
---|
378 | outputDataSet.deleteInvisible();
|
---|
379 | }
|
---|
380 | return outputDataSet;
|
---|
381 | } finally {
|
---|
382 | progressMonitor.finishTask();
|
---|
383 | }
|
---|
384 | }
|
---|
385 |
|
---|
386 | /**
|
---|
387 | * replies the set of ids of all primitives for which a fetch request to the
|
---|
388 | * server was submitted but which are not available from the server (the server
|
---|
389 | * replied a return code of 404)
|
---|
390 | *
|
---|
391 | * @return the set of ids of missing primitives
|
---|
392 | */
|
---|
393 | public Set<PrimitiveId> getMissingPrimitives() {
|
---|
394 | return missingPrimitives;
|
---|
395 | }
|
---|
396 |
|
---|
397 | /**
|
---|
398 | * The class holding the results given by {@link Fetcher}.
|
---|
399 | * It is only a wrapper of the resulting {@link DataSet} and the collection of {@link PrimitiveId} that could not have been loaded.
|
---|
400 | */
|
---|
401 | protected static class FetchResult {
|
---|
402 |
|
---|
403 | /**
|
---|
404 | * The resulting data set
|
---|
405 | */
|
---|
406 | public final DataSet dataSet;
|
---|
407 |
|
---|
408 | /**
|
---|
409 | * The collection of primitive ids that could not have been loaded
|
---|
410 | */
|
---|
411 | public final Set<PrimitiveId> missingPrimitives;
|
---|
412 |
|
---|
413 | /**
|
---|
414 | * Constructs a {@code FetchResult}
|
---|
415 | * @param dataSet The resulting data set
|
---|
416 | * @param missingPrimitives The collection of primitive ids that could not have been loaded
|
---|
417 | */
|
---|
418 | public FetchResult(DataSet dataSet, Set<PrimitiveId> missingPrimitives) {
|
---|
419 | this.dataSet = dataSet;
|
---|
420 | this.missingPrimitives = missingPrimitives;
|
---|
421 | }
|
---|
422 | }
|
---|
423 |
|
---|
424 | /**
|
---|
425 | * The class that actually download data from OSM API.
|
---|
426 | * Several instances of this class are used by {@link MultiFetchServerObjectReader} (one per set of primitives to fetch).
|
---|
427 | * The inheritance of {@link OsmServerReader} is only explained by the need to have a distinct OSM connection by {@code Fetcher} instance.
|
---|
428 | * @see FetchResult
|
---|
429 | */
|
---|
430 | protected static class Fetcher extends OsmServerReader implements Callable<FetchResult> {
|
---|
431 |
|
---|
432 | private final Set<Long> pkg;
|
---|
433 | private final OsmPrimitiveType type;
|
---|
434 | private final ProgressMonitor progressMonitor;
|
---|
435 |
|
---|
436 | /**
|
---|
437 | * Constructs a {@code Fetcher}
|
---|
438 | * @param type The primitive type. Must be one of {@link OsmPrimitiveType#NODE NODE}, {@link OsmPrimitiveType#WAY WAY},
|
---|
439 | * {@link OsmPrimitiveType#RELATION RELATION}
|
---|
440 | * @param idsPackage The set of primitives ids to fetch
|
---|
441 | * @param progressMonitor The progress monitor
|
---|
442 | */
|
---|
443 | public Fetcher(OsmPrimitiveType type, Set<Long> idsPackage, ProgressMonitor progressMonitor) {
|
---|
444 | this.pkg = idsPackage;
|
---|
445 | this.type = type;
|
---|
446 | this.progressMonitor = progressMonitor;
|
---|
447 | }
|
---|
448 |
|
---|
449 | @Override
|
---|
450 | public DataSet parseOsm(ProgressMonitor progressMonitor) throws OsmTransferException {
|
---|
451 | // This method is implemented because of the OsmServerReader inheritance, but not used,
|
---|
452 | // as the main target of this class is the call() method.
|
---|
453 | return fetch(progressMonitor).dataSet;
|
---|
454 | }
|
---|
455 |
|
---|
456 | @Override
|
---|
457 | public FetchResult call() throws Exception {
|
---|
458 | return fetch(progressMonitor);
|
---|
459 | }
|
---|
460 |
|
---|
461 | /**
|
---|
462 | * fetches the requested primitives and updates the specified progress monitor.
|
---|
463 | * @param progressMonitor the progress monitor
|
---|
464 | * @return the {@link FetchResult} of this operation
|
---|
465 | * @throws OsmTransferException if an error occurs while communicating with the API server
|
---|
466 | */
|
---|
467 | protected FetchResult fetch(ProgressMonitor progressMonitor) throws OsmTransferException {
|
---|
468 | try {
|
---|
469 | return multiGetIdPackage(type, pkg, progressMonitor);
|
---|
470 | } catch (OsmApiException e) {
|
---|
471 | if (e.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND) {
|
---|
472 | Main.info(tr("Server replied with response code 404, retrying with an individual request for each object."));
|
---|
473 | return singleGetIdPackage(type, pkg, progressMonitor);
|
---|
474 | } else {
|
---|
475 | throw e;
|
---|
476 | }
|
---|
477 | }
|
---|
478 | }
|
---|
479 |
|
---|
480 | /**
|
---|
481 | * invokes a Multi Get for a set of ids and a given {@link OsmPrimitiveType}.
|
---|
482 | * The retrieved primitives are merged to {@link #outputDataSet}.
|
---|
483 | *
|
---|
484 | * @param type The primitive type. Must be one of {@link OsmPrimitiveType#NODE NODE}, {@link OsmPrimitiveType#WAY WAY},
|
---|
485 | * {@link OsmPrimitiveType#RELATION RELATION}
|
---|
486 | * @param pkg the package of ids
|
---|
487 | * @return the {@link FetchResult} of this operation
|
---|
488 | * @throws OsmTransferException if an error occurs while communicating with the API server
|
---|
489 | */
|
---|
490 | protected FetchResult multiGetIdPackage(OsmPrimitiveType type, Set<Long> pkg, ProgressMonitor progressMonitor)
|
---|
491 | throws OsmTransferException {
|
---|
492 | String request = buildRequestString(type, pkg);
|
---|
493 | FetchResult result = null;
|
---|
494 | try (InputStream in = getInputStream(request, NullProgressMonitor.INSTANCE)) {
|
---|
495 | if (in == null) return null;
|
---|
496 | progressMonitor.subTask(tr("Downloading OSM data..."));
|
---|
497 | try {
|
---|
498 | result = new FetchResult(OsmReader.parseDataSet(in, progressMonitor.createSubTaskMonitor(pkg.size(), false)), null);
|
---|
499 | } catch (Exception e) {
|
---|
500 | throw new OsmTransferException(e);
|
---|
501 | }
|
---|
502 | } catch (IOException ex) {
|
---|
503 | Main.warn(ex);
|
---|
504 | }
|
---|
505 | return result;
|
---|
506 | }
|
---|
507 |
|
---|
508 | /**
|
---|
509 | * invokes a Multi Get for a single id and a given {@link OsmPrimitiveType}.
|
---|
510 | * The retrieved primitive is merged to {@link #outputDataSet}.
|
---|
511 | *
|
---|
512 | * @param type The primitive type. Must be one of {@link OsmPrimitiveType#NODE NODE}, {@link OsmPrimitiveType#WAY WAY},
|
---|
513 | * {@link OsmPrimitiveType#RELATION RELATION}
|
---|
514 | * @param id the id
|
---|
515 | * @return the {@link DataSet} resulting of this operation
|
---|
516 | * @throws OsmTransferException if an error occurs while communicating with the API server
|
---|
517 | */
|
---|
518 | protected DataSet singleGetId(OsmPrimitiveType type, long id, ProgressMonitor progressMonitor) throws OsmTransferException {
|
---|
519 | String request = buildRequestString(type, id);
|
---|
520 | DataSet result = null;
|
---|
521 | try (InputStream in = getInputStream(request, NullProgressMonitor.INSTANCE)) {
|
---|
522 | if (in == null) return null;
|
---|
523 | progressMonitor.subTask(tr("Downloading OSM data..."));
|
---|
524 | try {
|
---|
525 | result = OsmReader.parseDataSet(in, progressMonitor.createSubTaskMonitor(1, false));
|
---|
526 | } catch (Exception e) {
|
---|
527 | throw new OsmTransferException(e);
|
---|
528 | }
|
---|
529 | } catch (IOException ex) {
|
---|
530 | Main.warn(ex);
|
---|
531 | }
|
---|
532 | return result;
|
---|
533 | }
|
---|
534 |
|
---|
535 | /**
|
---|
536 | * invokes a sequence of Multi Gets for individual ids in a set of ids and a given {@link OsmPrimitiveType}.
|
---|
537 | * The retrieved primitives are merged to {@link #outputDataSet}.
|
---|
538 | *
|
---|
539 | * This method is used if one of the ids in pkg doesn't exist (the server replies with return code 404).
|
---|
540 | * If the set is fetched with this method it is possible to find out which of the ids doesn't exist.
|
---|
541 | * Unfortunately, the server does not provide an error header or an error body for a 404 reply.
|
---|
542 | *
|
---|
543 | * @param type The primitive type. Must be one of {@link OsmPrimitiveType#NODE NODE}, {@link OsmPrimitiveType#WAY WAY},
|
---|
544 | * {@link OsmPrimitiveType#RELATION RELATION}
|
---|
545 | * @param pkg the set of ids
|
---|
546 | * @return the {@link FetchResult} of this operation
|
---|
547 | * @throws OsmTransferException if an error occurs while communicating with the API server
|
---|
548 | */
|
---|
549 | protected FetchResult singleGetIdPackage(OsmPrimitiveType type, Set<Long> pkg, ProgressMonitor progressMonitor)
|
---|
550 | throws OsmTransferException {
|
---|
551 | FetchResult result = new FetchResult(new DataSet(), new HashSet<PrimitiveId>());
|
---|
552 | String baseUrl = OsmApi.getOsmApi().getBaseUrl();
|
---|
553 | for (long id : pkg) {
|
---|
554 | try {
|
---|
555 | String msg = "";
|
---|
556 | switch (type) {
|
---|
557 | case NODE: msg = tr("Fetching node with id {0} from ''{1}''", id, baseUrl); break;
|
---|
558 | case WAY: msg = tr("Fetching way with id {0} from ''{1}''", id, baseUrl); break;
|
---|
559 | case RELATION: msg = tr("Fetching relation with id {0} from ''{1}''", id, baseUrl); break;
|
---|
560 | }
|
---|
561 | progressMonitor.setCustomText(msg);
|
---|
562 | result.dataSet.mergeFrom(singleGetId(type, id, progressMonitor));
|
---|
563 | } catch (OsmApiException e) {
|
---|
564 | if (e.getResponseCode() == HttpURLConnection.HTTP_NOT_FOUND) {
|
---|
565 | Main.info(tr("Server replied with response code 404 for id {0}. Skipping.", Long.toString(id)));
|
---|
566 | result.missingPrimitives.add(new SimplePrimitiveId(id, type));
|
---|
567 | } else {
|
---|
568 | throw e;
|
---|
569 | }
|
---|
570 | }
|
---|
571 | }
|
---|
572 | return result;
|
---|
573 | }
|
---|
574 | }
|
---|
575 | }
|
---|