source: josm/trunk/src/org/openstreetmap/josm/data/APIDataSet.java@ 18757

Last change on this file since 18757 was 16913, checked in by simon04, 4 years ago

fix #19698 - Refactoring: make private fields final
  • Property svn:eol-style set to native
File size: 12.4 KB
Line 
1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.data;
3
4import java.util.ArrayList;
5import java.util.Collection;
6import java.util.Comparator;
7import java.util.HashMap;
8import java.util.HashSet;
9import java.util.LinkedList;
10import java.util.List;
11import java.util.Map;
12import java.util.Set;
13import java.util.Stack;
14import java.util.stream.Collectors;
15import java.util.stream.Stream;
16
17import org.openstreetmap.josm.data.conflict.ConflictCollection;
18import org.openstreetmap.josm.data.osm.CyclicUploadDependencyException;
19import org.openstreetmap.josm.data.osm.DataSet;
20import org.openstreetmap.josm.data.osm.IPrimitive;
21import org.openstreetmap.josm.data.osm.Node;
22import org.openstreetmap.josm.data.osm.OsmPrimitive;
23import org.openstreetmap.josm.data.osm.OsmPrimitiveComparator;
24import org.openstreetmap.josm.data.osm.PrimitiveId;
25import org.openstreetmap.josm.data.osm.Relation;
26import org.openstreetmap.josm.data.osm.RelationMember;
27import org.openstreetmap.josm.data.osm.Way;
28import org.openstreetmap.josm.tools.Logging;
29import org.openstreetmap.josm.tools.Utils;
30
31/**
32 * Represents a collection of {@link OsmPrimitive}s which should be uploaded to the API.
33 * The collection is derived from the modified primitives of an {@link DataSet} and it provides methods
34 * for sorting the objects in upload order.
35 * @since 2025
36 */
37public class APIDataSet {
38 private List<OsmPrimitive> toAdd;
39 private final List<OsmPrimitive> toUpdate;
40 private List<OsmPrimitive> toDelete;
41
42 /**
43 * The type of operation we can perform with OSM API on a primitive.
44 * @since 13161
45 */
46 public enum APIOperation {
47 /** Add a new primitive */
48 ADD,
49 /** Update an existing primitive */
50 UPDATE,
51 /** Delete an existing primitive */
52 DELETE;
53
54 /**
55 * Determines the API operation to perform on a primitive.
56 * @param osm OSM primitive
57 * @return the API operation to perform on {@code osm}
58 */
59 public static APIOperation of(OsmPrimitive osm) {
60 if (osm.isNewOrUndeleted() && !osm.isDeleted()) {
61 return ADD;
62 } else if (osm.isModified() && !osm.isDeleted()) {
63 return UPDATE;
64 } else if (osm.isDeleted() && !osm.isNew() && osm.isModified() && osm.isVisible()) {
65 return DELETE;
66 }
67 return null;
68 }
69 }
70
71 /**
72 * creates a new empty data set
73 */
74 public APIDataSet() {
75 toAdd = new LinkedList<>();
76 toUpdate = new LinkedList<>();
77 toDelete = new LinkedList<>();
78 }
79
80 /**
81 * initializes the API data set with the modified primitives in <code>ds</code>
82 *
83 * @param ds the data set. Ignored, if null.
84 */
85 public void init(DataSet ds) {
86 if (ds == null) return;
87 init(ds.allPrimitives());
88 }
89
90 /**
91 * Initializes the API data set with the modified primitives, ignores unmodified primitives.
92 *
93 * @param primitives the primitives
94 */
95 public final void init(Collection<OsmPrimitive> primitives) {
96 toAdd.clear();
97 toUpdate.clear();
98 toDelete.clear();
99
100 for (OsmPrimitive osm :primitives) {
101 APIOperation op = APIOperation.of(osm);
102 if (op != null) {
103 switch (op) {
104 case ADD: toAdd.add(osm); break;
105 case UPDATE: toUpdate.add(osm); break;
106 case DELETE: toDelete.add(osm); break;
107 default: Logging.trace("Ignored primitive {0} -> {1}", osm, op);
108 }
109 }
110 }
111 final Comparator<OsmPrimitive> orderingNodesWaysRelations = OsmPrimitiveComparator.orderingNodesWaysRelations();
112 final Comparator<OsmPrimitive> byUniqueId = OsmPrimitiveComparator.comparingUniqueId();
113 toAdd.sort(orderingNodesWaysRelations.thenComparing(byUniqueId));
114 toUpdate.sort(orderingNodesWaysRelations.thenComparing(byUniqueId));
115 toDelete.sort(orderingNodesWaysRelations.reversed().thenComparing(byUniqueId));
116 }
117
118 /**
119 * initializes the API data set with the modified primitives in <code>ds</code>
120 *
121 * @param ds the data set. Ignored, if null.
122 */
123 public APIDataSet(DataSet ds) {
124 this();
125 init(ds);
126 }
127
128 /**
129 * Replies true if one of the primitives to be updated or to be deleted
130 * participates in at least one conflict in <code>conflicts</code>
131 *
132 * @param conflicts the collection of conflicts
133 * @return true if one of the primitives to be updated or to be deleted
134 * participates in at least one conflict in <code>conflicts</code>
135 */
136 public boolean participatesInConflict(ConflictCollection conflicts) {
137 if (conflicts == null || conflicts.isEmpty()) return false;
138 Set<PrimitiveId> idsParticipatingInConflicts = conflicts.get().stream()
139 .flatMap(c -> Stream.of(c.getMy(), c.getTheir()))
140 .map(OsmPrimitive::getPrimitiveId)
141 .collect(Collectors.toSet());
142 return Stream.of(toUpdate, toDelete)
143 .flatMap(Collection::stream)
144 .map(OsmPrimitive::getPrimitiveId)
145 .anyMatch(idsParticipatingInConflicts::contains);
146 }
147
148 /**
149 * initializes the API data set with the primitives in <code>primitives</code>
150 *
151 * @param primitives the collection of primitives
152 */
153 public APIDataSet(Collection<OsmPrimitive> primitives) {
154 this();
155 init(primitives);
156 }
157
158 /**
159 * Replies true if there are no primitives to upload
160 *
161 * @return true if there are no primitives to upload
162 */
163 public boolean isEmpty() {
164 return toAdd.isEmpty() && toUpdate.isEmpty() && toDelete.isEmpty();
165 }
166
167 /**
168 * Replies the primitives which should be added to the OSM database
169 *
170 * @return the primitives which should be added to the OSM database
171 */
172 public List<OsmPrimitive> getPrimitivesToAdd() {
173 return toAdd;
174 }
175
176 /**
177 * Replies the primitives which should be updated in the OSM database
178 *
179 * @return the primitives which should be updated in the OSM database
180 */
181 public List<OsmPrimitive> getPrimitivesToUpdate() {
182 return toUpdate;
183 }
184
185 /**
186 * Replies the primitives which should be deleted in the OSM database
187 *
188 * @return the primitives which should be deleted in the OSM database
189 */
190 public List<OsmPrimitive> getPrimitivesToDelete() {
191 return toDelete;
192 }
193
194 /**
195 * Replies all primitives
196 *
197 * @return all primitives
198 */
199 public List<OsmPrimitive> getPrimitives() {
200 List<OsmPrimitive> ret = new LinkedList<>();
201 ret.addAll(toAdd);
202 ret.addAll(toUpdate);
203 ret.addAll(toDelete);
204 return ret;
205 }
206
207 /**
208 * Replies the number of objects to upload
209 *
210 * @return the number of objects to upload
211 */
212 public int getSize() {
213 return toAdd.size() + toUpdate.size() + toDelete.size();
214 }
215
216 /**
217 * Removes the given primitives from this {@link APIDataSet}
218 * @param processed The primitives to remove
219 */
220 public void removeProcessed(Collection<IPrimitive> processed) {
221 if (processed == null) return;
222 toAdd.removeAll(processed);
223 toUpdate.removeAll(processed);
224 toDelete.removeAll(processed);
225 }
226
227 /**
228 * Adjusts the upload order for new relations. Child relations are uploaded first,
229 * parent relations second.
230 *
231 * This method detects cyclic dependencies in new relation. Relations with cyclic
232 * dependencies can't be uploaded.
233 *
234 * @throws CyclicUploadDependencyException if a cyclic dependency is detected
235 */
236 public void adjustRelationUploadOrder() throws CyclicUploadDependencyException {
237 List<OsmPrimitive> newToAdd = new LinkedList<>();
238 newToAdd.addAll(Utils.filteredCollection(toAdd, Node.class));
239 newToAdd.addAll(Utils.filteredCollection(toAdd, Way.class));
240
241 List<Relation> relationsToAdd = new ArrayList<>(Utils.filteredCollection(toAdd, Relation.class));
242 List<Relation> noProblemRelations = filterRelationsNotReferringToNewRelations(relationsToAdd);
243 newToAdd.addAll(noProblemRelations);
244 relationsToAdd.removeAll(noProblemRelations);
245
246 RelationUploadDependencyGraph graph = new RelationUploadDependencyGraph(relationsToAdd, true);
247 newToAdd.addAll(graph.computeUploadOrder(false));
248 toAdd = newToAdd;
249
250 List<OsmPrimitive> newToDelete = new LinkedList<>();
251 graph = new RelationUploadDependencyGraph(Utils.filteredCollection(toDelete, Relation.class), false);
252 newToDelete.addAll(graph.computeUploadOrder(true));
253 newToDelete.addAll(Utils.filteredCollection(toDelete, Way.class));
254 newToDelete.addAll(Utils.filteredCollection(toDelete, Node.class));
255 toDelete = newToDelete;
256 }
257
258 /**
259 * Replies the subset of relations in <code>relations</code> which are not referring to any
260 * new relation
261 *
262 * @param relations a list of relations
263 * @return the subset of relations in <code>relations</code> which are not referring to any
264 * new relation
265 */
266 protected List<Relation> filterRelationsNotReferringToNewRelations(Collection<Relation> relations) {
267 List<Relation> ret = new LinkedList<>();
268 for (Relation relation: relations) {
269 boolean refersToNewRelation = relation.getMembers().stream()
270 .anyMatch(m -> m.isRelation() && m.getMember().isNewOrUndeleted());
271 if (!refersToNewRelation) {
272 ret.add(relation);
273 }
274 }
275 return ret;
276 }
277
278 /**
279 * Utility class to sort a collection of new relations with their dependencies
280 * topologically.
281 *
282 */
283 private static class RelationUploadDependencyGraph {
284 private final Map<Relation, Set<Relation>> children = new HashMap<>();
285 private Collection<Relation> relations;
286 private Set<Relation> visited = new HashSet<>();
287 private List<Relation> uploadOrder;
288 private final boolean newOrUndeleted;
289
290 RelationUploadDependencyGraph(Collection<Relation> relations, boolean newOrUndeleted) {
291 this.newOrUndeleted = newOrUndeleted;
292 build(relations);
293 }
294
295 public final void build(Collection<Relation> relations) {
296 this.relations = new HashSet<>();
297 for (Relation relation: relations) {
298 if (newOrUndeleted ? !relation.isNewOrUndeleted() : !relation.isDeleted()) {
299 continue;
300 }
301 this.relations.add(relation);
302 for (RelationMember m: relation.getMembers()) {
303 if (m.isRelation() && (newOrUndeleted ? m.getMember().isNewOrUndeleted() : m.getMember().isDeleted())) {
304 addDependency(relation, (Relation) m.getMember());
305 }
306 }
307 }
308 }
309
310 public Set<Relation> getChildren(Relation relation) {
311 return children.computeIfAbsent(relation, k -> new HashSet<>());
312 }
313
314 public void addDependency(Relation relation, Relation child) {
315 getChildren(relation).add(child);
316 }
317
318 protected void visit(Stack<Relation> path, Relation current) throws CyclicUploadDependencyException {
319 if (path.contains(current)) {
320 path.push(current);
321 throw new CyclicUploadDependencyException(path);
322 }
323 if (!visited.contains(current)) {
324 path.push(current);
325 visited.add(current);
326 for (Relation dependent : getChildren(current)) {
327 visit(path, dependent);
328 }
329 uploadOrder.add(current);
330 path.pop();
331 }
332 }
333
334 public List<Relation> computeUploadOrder(boolean reverse) throws CyclicUploadDependencyException {
335 visited = new HashSet<>();
336 uploadOrder = new LinkedList<>();
337 Stack<Relation> path = new Stack<>();
338 for (Relation relation: relations) {
339 visit(path, relation);
340 }
341 List<Relation> ret = new ArrayList<>(relations);
342 Comparator<? super Relation> cmpr = Comparator.comparingInt(uploadOrder::indexOf);
343 if (reverse) {
344 cmpr = cmpr.reversed();
345 }
346 ret.sort(cmpr);
347 return ret;
348 }
349 }
350}
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