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6ae6c5bd | 1 | /******************************************************************************* |
f8f46a52 | 2 | * Copyright (c) 2015, 2016 Ericsson |
6ae6c5bd PT |
3 | * |
4 | * All rights reserved. This program and the accompanying materials are | |
5 | * made available under the terms of the Eclipse Public License v1.0 which | |
6 | * accompanies this distribution, and is available at | |
7 | * http://www.eclipse.org/legal/epl-v10.html | |
8 | * | |
9 | * Contributors: | |
10 | * Patrick Tasse - Initial API and implementation | |
11 | *******************************************************************************/ | |
12 | ||
13 | package org.eclipse.tracecompass.tmf.ui.views.timegraph; | |
14 | ||
15 | import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull; | |
16 | ||
17 | import java.util.ArrayList; | |
18 | import java.util.HashMap; | |
19 | import java.util.List; | |
20 | import java.util.Map; | |
21 | import java.util.concurrent.CopyOnWriteArrayList; | |
47c79d95 | 22 | import java.util.logging.Logger; |
6ae6c5bd PT |
23 | |
24 | import org.eclipse.core.runtime.IProgressMonitor; | |
25 | import org.eclipse.jdt.annotation.NonNull; | |
26 | import org.eclipse.jdt.annotation.Nullable; | |
47c79d95 | 27 | import org.eclipse.tracecompass.common.core.log.TraceCompassLog; |
6ae6c5bd PT |
28 | import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem; |
29 | import org.eclipse.tracecompass.statesystem.core.exceptions.StateSystemDisposedException; | |
30 | import org.eclipse.tracecompass.statesystem.core.interval.ITmfStateInterval; | |
6ae6c5bd PT |
31 | import org.eclipse.tracecompass.tmf.core.trace.ITmfTrace; |
32 | import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.TimeGraphPresentationProvider; | |
33 | import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.ILinkEvent; | |
e790b877 | 34 | import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.IMarkerEvent; |
6ae6c5bd | 35 | import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.ITimeEvent; |
6ae6c5bd PT |
36 | import org.eclipse.tracecompass.tmf.ui.widgets.timegraph.model.TimeGraphEntry; |
37 | ||
38 | import com.google.common.collect.HashMultimap; | |
39 | import com.google.common.collect.Multimap; | |
40 | ||
41 | /** | |
42 | * An abstract time graph view where each entry's time event list is populated | |
43 | * from a state system. The state system full state is queried in chronological | |
44 | * order before creating the time event lists as this is optimal for state | |
45 | * system queries. | |
46 | * | |
0336f981 | 47 | * @since 1.1 |
6ae6c5bd PT |
48 | */ |
49 | public abstract class AbstractStateSystemTimeGraphView extends AbstractTimeGraphView { | |
50 | ||
51 | // ------------------------------------------------------------------------ | |
52 | // Constants | |
53 | // ------------------------------------------------------------------------ | |
54 | ||
55 | private static final long MAX_INTERVALS = 1000000; | |
56 | ||
57 | // ------------------------------------------------------------------------ | |
58 | // Fields | |
59 | // ------------------------------------------------------------------------ | |
60 | ||
61 | /** The state system to entry list hash map */ | |
bf415887 | 62 | private final Map<ITmfStateSystem, List<@NonNull TimeGraphEntry>> fSSEntryListMap = new HashMap<>(); |
6ae6c5bd PT |
63 | |
64 | /** The trace to state system multi map */ | |
65 | private final Multimap<ITmfTrace, ITmfStateSystem> fTraceSSMap = HashMultimap.create(); | |
66 | ||
a1dadf6b | 67 | private static final Logger LOGGER = TraceCompassLog.getLogger(AbstractStateSystemTimeGraphView.class); |
47c79d95 | 68 | |
6ae6c5bd PT |
69 | // ------------------------------------------------------------------------ |
70 | // Classes | |
71 | // ------------------------------------------------------------------------ | |
72 | ||
73 | /** | |
74 | * Handler for state system queries | |
75 | */ | |
76 | public interface IQueryHandler { | |
77 | /** | |
78 | * Handle a full or partial list of full states. This can be called many | |
79 | * times for the same query if the query result is split, in which case | |
80 | * the previous full state is null only the first time it is called, and | |
81 | * set to the last full state of the previous call from then on. | |
82 | * | |
83 | * @param fullStates | |
84 | * the list of full states | |
85 | * @param prevFullState | |
86 | * the previous full state, or null | |
87 | */ | |
88 | void handle(@NonNull List<List<ITmfStateInterval>> fullStates, @Nullable List<ITmfStateInterval> prevFullState); | |
89 | } | |
90 | ||
91 | private class ZoomThreadByTime extends ZoomThread { | |
92 | private final @NonNull List<ITmfStateSystem> fZoomSSList; | |
93 | private boolean fClearZoomedLists; | |
94 | ||
95 | public ZoomThreadByTime(@NonNull List<ITmfStateSystem> ssList, long startTime, long endTime, long resolution, boolean restart) { | |
96 | super(startTime, endTime, resolution); | |
97 | fZoomSSList = ssList; | |
98 | fClearZoomedLists = !restart; | |
99 | } | |
100 | ||
101 | @Override | |
156e9ead | 102 | public void doRun() { |
6ae6c5bd | 103 | final List<ILinkEvent> links = new ArrayList<>(); |
e790b877 | 104 | final List<IMarkerEvent> markers = new ArrayList<>(); |
6ae6c5bd PT |
105 | if (fClearZoomedLists) { |
106 | clearZoomedLists(); | |
107 | } | |
108 | for (ITmfStateSystem ss : fZoomSSList) { | |
109 | List<TimeGraphEntry> entryList = null; | |
110 | synchronized (fSSEntryListMap) { | |
111 | entryList = fSSEntryListMap.get(ss); | |
112 | } | |
113 | if (entryList != null) { | |
e790b877 | 114 | zoomByTime(ss, entryList, links, markers, getZoomStartTime(), getZoomEndTime(), getResolution(), getMonitor()); |
6ae6c5bd PT |
115 | } |
116 | } | |
117 | if (!getMonitor().isCanceled()) { | |
24333461 PT |
118 | /* Refresh the trace-specific markers when zooming */ |
119 | markers.addAll(getTraceMarkerList(getZoomStartTime(), getZoomEndTime(), getResolution(), getMonitor())); | |
6d28f3e8 MAL |
120 | applyResults(() -> { |
121 | getTimeGraphViewer().setLinks(links); | |
122 | getTimeGraphViewer().setMarkers(markers); | |
123 | }); | |
47c79d95 | 124 | } else { |
a1dadf6b | 125 | LOGGER.info(() -> "[TimeGraphView:ZoomThreadCanceled]"); //$NON-NLS-1$ |
6ae6c5bd PT |
126 | } |
127 | } | |
128 | ||
129 | @Override | |
130 | public void cancel() { | |
131 | super.cancel(); | |
132 | if (fClearZoomedLists) { | |
133 | clearZoomedLists(); | |
134 | } | |
135 | } | |
136 | ||
e790b877 | 137 | private void zoomByTime(final ITmfStateSystem ss, final List<TimeGraphEntry> entryList, final List<ILinkEvent> links, final List<IMarkerEvent> markers, |
6ae6c5bd PT |
138 | long startTime, long endTime, long resolution, final @NonNull IProgressMonitor monitor) { |
139 | final long start = Math.max(startTime, ss.getStartTime()); | |
140 | final long end = Math.min(endTime, ss.getCurrentEndTime()); | |
141 | final boolean fullRange = getZoomStartTime() <= getStartTime() && getZoomEndTime() >= getEndTime(); | |
142 | if (end < start) { | |
143 | return; | |
144 | } | |
145 | if (fullRange) { | |
146 | redraw(); | |
147 | } | |
148 | queryFullStates(ss, start, end, resolution, monitor, new IQueryHandler() { | |
149 | @Override | |
150 | public void handle(@NonNull List<List<ITmfStateInterval>> fullStates, @Nullable List<ITmfStateInterval> prevFullState) { | |
a1dadf6b | 151 | LOGGER.config(() -> "[TimeGraphView:ZoomThreadGettingStates]"); //$NON-NLS-1$ |
6ae6c5bd PT |
152 | if (!fullRange) { |
153 | for (TimeGraphEntry entry : entryList) { | |
154 | zoom(checkNotNull(entry), ss, fullStates, prevFullState, monitor); | |
155 | } | |
156 | } | |
157 | /* Refresh the arrows when zooming */ | |
a1dadf6b | 158 | LOGGER.config(() -> "[TimeGraphView:ZoomThreadGettingLinks]"); //$NON-NLS-1$ |
143217ee | 159 | links.addAll(getLinkList(ss, fullStates, prevFullState, monitor)); |
24333461 | 160 | /* Refresh the view-specific markers when zooming */ |
a1dadf6b | 161 | LOGGER.config(() -> "[TimeGraphView:ZoomThreadGettingMarkers]"); //$NON-NLS-1$ |
24333461 | 162 | markers.addAll(getViewMarkerList(ss, fullStates, prevFullState, monitor)); |
a1dadf6b | 163 | LOGGER.config(() -> "[TimeGraphView:ZoomThreadDone]"); //$NON-NLS-1$ |
6ae6c5bd PT |
164 | } |
165 | }); | |
166 | refresh(); | |
167 | } | |
168 | ||
169 | private void zoom(@NonNull TimeGraphEntry entry, ITmfStateSystem ss, @NonNull List<List<ITmfStateInterval>> fullStates, @Nullable List<ITmfStateInterval> prevFullState, @NonNull IProgressMonitor monitor) { | |
170 | List<ITimeEvent> eventList = getEventList(entry, ss, fullStates, prevFullState, monitor); | |
171 | if (eventList != null) { | |
6d28f3e8 MAL |
172 | applyResults(() -> { |
173 | for (ITimeEvent event : eventList) { | |
174 | if (monitor.isCanceled()) { | |
175 | return; | |
176 | } | |
177 | entry.addZoomedEvent(event); | |
178 | } | |
179 | }); | |
6ae6c5bd | 180 | } |
f8f46a52 | 181 | for (TimeGraphEntry child : entry.getChildren()) { |
6ae6c5bd | 182 | if (monitor.isCanceled()) { |
a1dadf6b | 183 | LOGGER.info(() -> "[TimeGraphView:ZoomThreadCanceled]"); //$NON-NLS-1$ |
6ae6c5bd PT |
184 | return; |
185 | } | |
f8f46a52 | 186 | zoom(child, ss, fullStates, prevFullState, monitor); |
6ae6c5bd PT |
187 | } |
188 | } | |
189 | ||
190 | private void clearZoomedLists() { | |
191 | for (ITmfStateSystem ss : fZoomSSList) { | |
192 | List<TimeGraphEntry> entryList = null; | |
193 | synchronized (fSSEntryListMap) { | |
194 | entryList = fSSEntryListMap.get(ss); | |
195 | } | |
196 | if (entryList != null) { | |
197 | for (TimeGraphEntry entry : entryList) { | |
198 | clearZoomedList(entry); | |
199 | } | |
200 | } | |
201 | } | |
202 | fClearZoomedLists = false; | |
203 | } | |
204 | ||
205 | private void clearZoomedList(TimeGraphEntry entry) { | |
206 | entry.setZoomedEventList(null); | |
f8f46a52 PT |
207 | for (TimeGraphEntry child : entry.getChildren()) { |
208 | clearZoomedList(child); | |
6ae6c5bd PT |
209 | } |
210 | } | |
211 | } | |
212 | ||
213 | // ------------------------------------------------------------------------ | |
214 | // Constructors | |
215 | // ------------------------------------------------------------------------ | |
216 | ||
217 | /** | |
218 | * Constructs a time graph view that contains either a time graph viewer or | |
219 | * a time graph combo. | |
220 | * | |
221 | * By default, the view uses a time graph viewer. To use a time graph combo, | |
222 | * the subclass constructor must call {@link #setTreeColumns(String[])} and | |
223 | * {@link #setTreeLabelProvider(TreeLabelProvider)}. | |
224 | * | |
225 | * @param id | |
226 | * The id of the view | |
227 | * @param pres | |
228 | * The presentation provider | |
229 | */ | |
230 | public AbstractStateSystemTimeGraphView(String id, TimeGraphPresentationProvider pres) { | |
231 | super(id, pres); | |
232 | } | |
233 | ||
234 | // ------------------------------------------------------------------------ | |
235 | // Internal | |
236 | // ------------------------------------------------------------------------ | |
237 | ||
238 | /** | |
239 | * Gets the entry list for a state system | |
240 | * | |
241 | * @param ss | |
242 | * the state system | |
243 | * | |
244 | * @return the entry list map | |
245 | */ | |
bf415887 | 246 | protected List<@NonNull TimeGraphEntry> getEntryList(ITmfStateSystem ss) { |
6ae6c5bd PT |
247 | synchronized (fSSEntryListMap) { |
248 | return fSSEntryListMap.get(ss); | |
249 | } | |
250 | } | |
251 | ||
252 | /** | |
253 | * Adds a trace entry list to the entry list map | |
254 | * | |
255 | * @param trace | |
256 | * the trace | |
257 | * @param ss | |
258 | * the state system | |
259 | * @param list | |
260 | * the list of time graph entries | |
261 | */ | |
bf415887 | 262 | protected void putEntryList(ITmfTrace trace, ITmfStateSystem ss, List<@NonNull TimeGraphEntry> list) { |
6ae6c5bd PT |
263 | super.putEntryList(trace, list); |
264 | synchronized (fSSEntryListMap) { | |
265 | fSSEntryListMap.put(ss, new CopyOnWriteArrayList<>(list)); | |
266 | fTraceSSMap.put(trace, ss); | |
267 | } | |
268 | } | |
269 | ||
270 | /** | |
271 | * Adds a list of entries to a trace's entry list | |
272 | * | |
273 | * @param trace | |
274 | * the trace | |
275 | * @param ss | |
276 | * the state system | |
277 | * @param list | |
278 | * the list of time graph entries to add | |
279 | */ | |
bf415887 | 280 | protected void addToEntryList(ITmfTrace trace, ITmfStateSystem ss, List<@NonNull TimeGraphEntry> list) { |
6ae6c5bd PT |
281 | super.addToEntryList(trace, list); |
282 | synchronized (fSSEntryListMap) { | |
bf415887 | 283 | List<@NonNull TimeGraphEntry> entryList = fSSEntryListMap.get(ss); |
6ae6c5bd PT |
284 | if (entryList == null) { |
285 | fSSEntryListMap.put(ss, new CopyOnWriteArrayList<>(list)); | |
286 | } else { | |
287 | entryList.addAll(list); | |
288 | } | |
289 | fTraceSSMap.put(trace, ss); | |
290 | } | |
291 | } | |
292 | ||
293 | /** | |
294 | * Removes a list of entries from a trace's entry list | |
295 | * | |
296 | * @param trace | |
297 | * the trace | |
298 | * @param ss | |
299 | * the state system | |
300 | * @param list | |
301 | * the list of time graph entries to remove | |
302 | */ | |
303 | protected void removeFromEntryList(ITmfTrace trace, ITmfStateSystem ss, List<TimeGraphEntry> list) { | |
304 | super.removeFromEntryList(trace, list); | |
305 | synchronized (fSSEntryListMap) { | |
306 | List<TimeGraphEntry> entryList = fSSEntryListMap.get(ss); | |
307 | if (entryList != null) { | |
308 | entryList.removeAll(list); | |
309 | if (entryList.isEmpty()) { | |
310 | fTraceSSMap.remove(trace, ss); | |
311 | } | |
312 | } | |
313 | } | |
314 | } | |
315 | ||
316 | @Override | |
317 | protected @Nullable ZoomThread createZoomThread(long startTime, long endTime, long resolution, boolean restart) { | |
318 | List<ITmfStateSystem> ssList = null; | |
319 | synchronized (fSSEntryListMap) { | |
320 | ssList = new ArrayList<>(fTraceSSMap.get(getTrace())); | |
321 | } | |
322 | if (ssList.isEmpty()) { | |
323 | return null; | |
324 | } | |
325 | return new ZoomThreadByTime(ssList, startTime, endTime, resolution, restart); | |
326 | } | |
327 | ||
328 | /** | |
329 | * Query the state system full state for the given time range. | |
330 | * | |
331 | * @param ss | |
332 | * The state system | |
333 | * @param start | |
334 | * The start time | |
335 | * @param end | |
336 | * The end time | |
337 | * @param resolution | |
338 | * The resolution | |
339 | * @param monitor | |
340 | * The progress monitor | |
341 | * @param handler | |
342 | * The query handler | |
343 | */ | |
344 | protected void queryFullStates(ITmfStateSystem ss, long start, long end, long resolution, | |
345 | @NonNull IProgressMonitor monitor, @NonNull IQueryHandler handler) { | |
346 | List<List<ITmfStateInterval>> fullStates = new ArrayList<>(); | |
347 | List<ITmfStateInterval> prevFullState = null; | |
348 | try { | |
349 | long time = start; | |
350 | while (true) { | |
351 | if (monitor.isCanceled()) { | |
352 | break; | |
353 | } | |
354 | List<ITmfStateInterval> fullState = ss.queryFullState(time); | |
355 | fullStates.add(fullState); | |
356 | if (fullStates.size() * fullState.size() > MAX_INTERVALS) { | |
357 | handler.handle(fullStates, prevFullState); | |
358 | prevFullState = fullStates.get(fullStates.size() - 1); | |
359 | fullStates.clear(); | |
360 | } | |
361 | if (time >= end) { | |
362 | break; | |
363 | } | |
364 | time = Math.min(end, time + resolution); | |
365 | } | |
366 | if (fullStates.size() > 0) { | |
367 | handler.handle(fullStates, prevFullState); | |
368 | } | |
369 | } catch (StateSystemDisposedException e) { | |
370 | /* Ignored */ | |
371 | } | |
372 | } | |
373 | ||
374 | /** | |
375 | * Gets the list of events for an entry for a given list of full states. | |
f8f46a52 PT |
376 | * <p> |
377 | * Called from the ZoomThread for every entry to update the zoomed event | |
378 | * list. Can be an empty implementation if the view does not support zoomed | |
379 | * event lists. Can also be used to compute the full event list. | |
6ae6c5bd PT |
380 | * |
381 | * @param tgentry | |
382 | * The time graph entry | |
383 | * @param ss | |
384 | * The state system | |
385 | * @param fullStates | |
386 | * A list of full states | |
387 | * @param prevFullState | |
388 | * The previous full state, or null | |
389 | * @param monitor | |
390 | * A progress monitor | |
391 | * @return The list of time graph events | |
6ae6c5bd PT |
392 | */ |
393 | protected abstract @Nullable List<ITimeEvent> getEventList(@NonNull TimeGraphEntry tgentry, ITmfStateSystem ss, | |
394 | @NonNull List<List<ITmfStateInterval>> fullStates, @Nullable List<ITmfStateInterval> prevFullState, @NonNull IProgressMonitor monitor); | |
395 | ||
396 | /** | |
397 | * Gets the list of links (displayed as arrows) for a given list of full | |
398 | * states. The default implementation returns an empty list. | |
399 | * | |
400 | * @param ss | |
401 | * The state system | |
402 | * @param fullStates | |
403 | * A list of full states | |
143217ee PT |
404 | * @param prevFullState |
405 | * The previous full state, or null | |
6ae6c5bd PT |
406 | * @param monitor |
407 | * A progress monitor | |
408 | * @return The list of link events | |
143217ee | 409 | * @since 2.0 |
6ae6c5bd PT |
410 | */ |
411 | protected @NonNull List<ILinkEvent> getLinkList(ITmfStateSystem ss, | |
143217ee | 412 | @NonNull List<List<ITmfStateInterval>> fullStates, @Nullable List<ITmfStateInterval> prevFullState, @NonNull IProgressMonitor monitor) { |
6ae6c5bd PT |
413 | return new ArrayList<>(); |
414 | } | |
415 | ||
e790b877 PT |
416 | /** |
417 | * Gets the list of markers for a given list of full | |
418 | * states. The default implementation returns an empty list. | |
419 | * | |
420 | * @param ss | |
421 | * The state system | |
422 | * @param fullStates | |
423 | * A list of full states | |
143217ee PT |
424 | * @param prevFullState |
425 | * The previous full state, or null | |
e790b877 PT |
426 | * @param monitor |
427 | * A progress monitor | |
428 | * @return The list of marker events | |
5dd0ebfe | 429 | * @since 2.0 |
e790b877 | 430 | */ |
24333461 | 431 | protected @NonNull List<IMarkerEvent> getViewMarkerList(ITmfStateSystem ss, |
143217ee | 432 | @NonNull List<List<ITmfStateInterval>> fullStates, @Nullable List<ITmfStateInterval> prevFullState, @NonNull IProgressMonitor monitor) { |
e790b877 PT |
433 | return new ArrayList<>(); |
434 | } | |
435 | ||
6ae6c5bd PT |
436 | /** |
437 | * @deprecated The subclass should call {@link #getEntryList(ITmfStateSystem)} instead. | |
438 | */ | |
439 | @Deprecated | |
440 | @Override | |
441 | protected final List<TimeGraphEntry> getEntryList(ITmfTrace trace) { | |
442 | throw new UnsupportedOperationException(); | |
443 | } | |
444 | ||
445 | /** | |
446 | * @deprecated The subclass should call {@link #addToEntryList(ITmfTrace, ITmfStateSystem, List)} instead. | |
447 | */ | |
448 | @Deprecated | |
449 | @Override | |
450 | protected final void addToEntryList(ITmfTrace trace, List<TimeGraphEntry> list) { | |
451 | throw new UnsupportedOperationException(); | |
452 | } | |
453 | ||
454 | /** | |
455 | * @deprecated The subclass should call {@link #putEntryList(ITmfTrace, ITmfStateSystem, List)} instead. | |
456 | */ | |
457 | @Deprecated | |
458 | @Override | |
459 | protected final void putEntryList(ITmfTrace trace, List<TimeGraphEntry> list) { | |
460 | throw new UnsupportedOperationException(); | |
461 | } | |
462 | ||
463 | /** | |
464 | * @deprecated The subclass should call {@link #removeFromEntryList(ITmfTrace, ITmfStateSystem, List)} instead. | |
465 | */ | |
466 | @Deprecated | |
467 | @Override | |
468 | protected final void removeFromEntryList(ITmfTrace trace, List<TimeGraphEntry> list) { | |
469 | throw new UnsupportedOperationException(); | |
470 | } | |
471 | ||
472 | /** | |
473 | * @deprecated The subclass should implement {@link #getEventList(TimeGraphEntry, ITmfStateSystem, List, List, IProgressMonitor)} instead. | |
474 | */ | |
475 | @Deprecated | |
476 | @Override | |
477 | protected final List<ITimeEvent> getEventList(TimeGraphEntry entry, long startTime, long endTime, long resolution, IProgressMonitor monitor) { | |
478 | throw new UnsupportedOperationException(); | |
479 | } | |
480 | ||
481 | /** | |
143217ee | 482 | * @deprecated The subclass should implement {@link #getLinkList(ITmfStateSystem, List, List, IProgressMonitor)} instead. |
6ae6c5bd PT |
483 | */ |
484 | @Deprecated | |
485 | @Override | |
486 | protected final List<ILinkEvent> getLinkList(long startTime, long endTime, long resolution, IProgressMonitor monitor) { | |
487 | throw new UnsupportedOperationException(); | |
488 | } | |
489 | ||
e790b877 | 490 | /** |
24333461 | 491 | * @deprecated The subclass should implement {@link #getViewMarkerList(ITmfStateSystem, List, List, IProgressMonitor)} instead. |
e790b877 PT |
492 | */ |
493 | @Deprecated | |
494 | @Override | |
24333461 | 495 | protected final List<IMarkerEvent> getViewMarkerList(long startTime, long endTime, long resolution, IProgressMonitor monitor) { |
e790b877 PT |
496 | throw new UnsupportedOperationException(); |
497 | } | |
498 | ||
6ae6c5bd | 499 | @Override |
dbae6118 BH |
500 | protected void resetView(ITmfTrace viewTrace) { |
501 | // Don't remove super call | |
502 | super.resetView(viewTrace); | |
6ae6c5bd | 503 | synchronized (fSSEntryListMap) { |
dbae6118 | 504 | for (ITmfStateSystem ss : fTraceSSMap.removeAll(viewTrace)) { |
6ae6c5bd PT |
505 | fSSEntryListMap.remove(ss); |
506 | } | |
507 | } | |
508 | } | |
509 | } |