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8c8bf09f | 1 | /******************************************************************************* |
09e86496 | 2 | * Copyright (c) 2009, 2010, 2012 Ericsson |
8c8bf09f ASL |
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: | |
20658947 FC |
10 | * Francois Chouinard - Initial API and implementation |
11 | * Francois Chouinard - Updated as per TMF Trace Model 1.0 | |
8c8bf09f ASL |
12 | *******************************************************************************/ |
13 | ||
6c13869b | 14 | package org.eclipse.linuxtools.tmf.core.trace; |
8c8bf09f | 15 | |
6f4a1d2b | 16 | import java.io.File; |
62d1696a | 17 | import java.io.FileNotFoundException; |
8c8bf09f | 18 | |
12c155f5 | 19 | import org.eclipse.core.resources.IProject; |
828e5592 | 20 | import org.eclipse.core.resources.IResource; |
c7e2f194 | 21 | import org.eclipse.core.runtime.Path; |
6c13869b | 22 | import org.eclipse.linuxtools.tmf.core.component.TmfEventProvider; |
72f1e62a | 23 | import org.eclipse.linuxtools.tmf.core.event.ITmfEvent; |
4df4581d | 24 | import org.eclipse.linuxtools.tmf.core.event.ITmfTimestamp; |
6c13869b FC |
25 | import org.eclipse.linuxtools.tmf.core.event.TmfTimeRange; |
26 | import org.eclipse.linuxtools.tmf.core.event.TmfTimestamp; | |
b4f71e4a | 27 | import org.eclipse.linuxtools.tmf.core.exceptions.TmfTraceException; |
6c13869b FC |
28 | import org.eclipse.linuxtools.tmf.core.request.ITmfDataRequest; |
29 | import org.eclipse.linuxtools.tmf.core.request.ITmfEventRequest; | |
8c8bf09f ASL |
30 | |
31 | /** | |
146a887c | 32 | * <b><u>TmfTrace</u></b> |
8c8bf09f | 33 | * <p> |
09e86496 FC |
34 | * Abstract implementation of ITmfTrace. |
35 | * <p> | |
13cb5f43 FC |
36 | * Since the concept of 'location' is trace specific, the concrete classes have |
37 | * to provide the related methods, namely: | |
38 | * <ul> | |
39 | * <li> public ITmfLocation<?> getCurrentLocation() | |
40 | * <li> public double getLocationRatio(ITmfLocation<?> location) | |
41 | * <li> public ITmfContext seekEvent(ITmfLocation<?> location) | |
42 | * <li> public ITmfContext seekEvent(double ratio) | |
43 | * </ul> | |
44 | * A concrete trace must provide its corresponding parser. A common way to | |
45 | * accomplish this is by making the concrete class extend TmfTrace and | |
46 | * implement ITmfEventParser. | |
47 | * <p> | |
48 | * The concrete class can either specify its own indexer or use the provided | |
49 | * TmfCheckpointIndexer (default). In this case, the trace cache size will be | |
50 | * used as checkpoint interval. | |
8c8bf09f | 51 | */ |
3791b5df | 52 | public abstract class TmfTrace<T extends ITmfEvent> extends TmfEventProvider<T> implements ITmfTrace<T> { |
62d1696a | 53 | |
e31e01e8 | 54 | // ------------------------------------------------------------------------ |
62d1696a | 55 | // Constants |
e31e01e8 | 56 | // ------------------------------------------------------------------------ |
62d1696a | 57 | |
3791b5df | 58 | /** |
20658947 | 59 | * The default trace cache size |
3791b5df | 60 | */ |
b4f71e4a | 61 | public static final int DEFAULT_TRACE_CACHE_SIZE = 10000; |
8c8bf09f | 62 | |
e31e01e8 | 63 | // ------------------------------------------------------------------------ |
8c8bf09f | 64 | // Attributes |
e31e01e8 | 65 | // ------------------------------------------------------------------------ |
8c8bf09f | 66 | |
09e86496 FC |
67 | // The resource used for persistent properties for this trace |
68 | private IResource fResource; | |
69 | ||
b0a282fb | 70 | // The trace path |
12c155f5 | 71 | private String fPath; |
b0a282fb | 72 | |
3791b5df | 73 | /** |
7e6347b0 | 74 | * The cache page size |
3791b5df | 75 | */ |
20658947 | 76 | protected int fCacheSize = DEFAULT_TRACE_CACHE_SIZE; |
62d1696a | 77 | |
7e6347b0 FC |
78 | /** |
79 | * The number of events collected so far | |
80 | */ | |
a3fe52fc | 81 | protected long fNbEvents = 0; |
62d1696a FC |
82 | |
83 | // The time span of the event stream | |
a4115405 FC |
84 | private ITmfTimestamp fStartTime = TmfTimestamp.BIG_CRUNCH; |
85 | private ITmfTimestamp fEndTime = TmfTimestamp.BIG_BANG; | |
62d1696a | 86 | |
3791b5df | 87 | /** |
085d898f | 88 | * The trace streaming interval (0 = no streaming) |
3791b5df FC |
89 | */ |
90 | protected long fStreamingInterval = 0; | |
085d898f | 91 | |
20658947 FC |
92 | /** |
93 | * The trace indexer | |
94 | */ | |
95 | protected ITmfTraceIndexer<ITmfTrace<ITmfEvent>> fIndexer; | |
96 | ||
7e6347b0 FC |
97 | /** |
98 | * The trace parser | |
99 | */ | |
100 | protected ITmfEventParser<ITmfEvent> fParser; | |
101 | ||
e31e01e8 | 102 | // ------------------------------------------------------------------------ |
3791b5df | 103 | // Construction |
e31e01e8 | 104 | // ------------------------------------------------------------------------ |
8c8bf09f | 105 | |
62d1696a | 106 | /** |
3791b5df | 107 | * The default, parameterless, constructor |
62d1696a | 108 | */ |
20658947 | 109 | @SuppressWarnings({ "unchecked", "rawtypes" }) |
3791b5df FC |
110 | public TmfTrace() { |
111 | super(); | |
7e6347b0 | 112 | fIndexer = new TmfCheckpointIndexer(this); |
05bd3318 FC |
113 | } |
114 | ||
115 | /** | |
13cb5f43 FC |
116 | * The standard constructor (non-live trace). Applicable when the trace |
117 | * implements its own parser and if at checkpoint-based index is OK. | |
3791b5df | 118 | * |
20658947 FC |
119 | * @param resource the resource associated to the trace |
120 | * @param type the trace event type | |
121 | * @param path the trace path | |
122 | * @param cacheSize the trace cache size | |
123 | * @throws FileNotFoundException | |
124 | */ | |
b4f71e4a | 125 | protected TmfTrace(final IResource resource, final Class<T> type, final String path, final int cacheSize) throws TmfTraceException { |
20658947 FC |
126 | this(resource, type, path, cacheSize, 0, null); |
127 | } | |
128 | ||
129 | /** | |
13cb5f43 FC |
130 | * The standard constructor (live trace). Applicable when the trace |
131 | * implements its own parser and if at checkpoint-based index is OK. | |
20658947 FC |
132 | * |
133 | * @param resource the resource associated to the trace | |
3791b5df FC |
134 | * @param type the trace event type |
135 | * @param path the trace path | |
20658947 FC |
136 | * @param cacheSize the trace cache size |
137 | * @param interval the trace streaming interval | |
05bd3318 FC |
138 | * @throws FileNotFoundException |
139 | */ | |
b4f71e4a | 140 | protected TmfTrace(final IResource resource, final Class<T> type, final String path, final int cacheSize, final long interval) throws TmfTraceException { |
20658947 | 141 | this(resource, type, path, cacheSize, interval, null); |
05bd3318 FC |
142 | } |
143 | ||
144 | /** | |
13cb5f43 FC |
145 | * The 'non-default indexer' constructor. Allows to provide a trace |
146 | * specific indexer. | |
3791b5df | 147 | * |
20658947 | 148 | * @param resource the resource associated to the trace |
3791b5df FC |
149 | * @param type the trace event type |
150 | * @param path the trace path | |
20658947 FC |
151 | * @param cacheSize the trace cache size |
152 | * @param indexer the trace indexer | |
05bd3318 FC |
153 | * @throws FileNotFoundException |
154 | */ | |
20658947 | 155 | protected TmfTrace(final IResource resource, final Class<T> type, final String path, final int cacheSize, |
b4f71e4a | 156 | final long interval, final ITmfTraceIndexer<?> indexer) throws TmfTraceException { |
13cb5f43 FC |
157 | this(resource, type, path, cacheSize, interval, null, null); |
158 | } | |
159 | ||
160 | /** | |
161 | * The full constructor where trace specific indexer/parser are provided. | |
162 | * | |
163 | * @param resource the resource associated to the trace | |
164 | * @param type the trace event type | |
165 | * @param path the trace path | |
166 | * @param cacheSize the trace cache size | |
167 | * @param indexer the trace indexer | |
168 | * @param parser the trace event parser | |
169 | * @throws FileNotFoundException | |
170 | */ | |
171 | @SuppressWarnings({ "unchecked", "rawtypes" }) | |
172 | protected TmfTrace(final IResource resource, final Class<T> type, final String path, final int cacheSize, | |
b4f71e4a | 173 | final long interval, final ITmfTraceIndexer<?> indexer, final ITmfEventParser<ITmfEvent> parser) throws TmfTraceException { |
00641a97 | 174 | super(); |
20658947 | 175 | fCacheSize = (cacheSize > 0) ? cacheSize : DEFAULT_TRACE_CACHE_SIZE; |
3791b5df | 176 | fStreamingInterval = interval; |
7e6347b0 | 177 | fIndexer = (indexer != null) ? indexer : new TmfCheckpointIndexer(this, fCacheSize); |
13cb5f43 | 178 | fParser = parser; |
09e86496 | 179 | initialize(resource, path, type); |
8c8bf09f ASL |
180 | } |
181 | ||
3791b5df FC |
182 | /** |
183 | * Copy constructor | |
184 | * | |
185 | * @param trace the original trace | |
186 | */ | |
20658947 | 187 | @SuppressWarnings({ "unchecked", "rawtypes" }) |
b4f71e4a | 188 | public TmfTrace(final TmfTrace<T> trace) throws TmfTraceException { |
3791b5df FC |
189 | super(); |
190 | if (trace == null) | |
191 | throw new IllegalArgumentException(); | |
20658947 FC |
192 | fCacheSize = trace.getCacheSize(); |
193 | fStreamingInterval = trace.getStreamingInterval(); | |
7e6347b0 | 194 | fIndexer = new TmfCheckpointIndexer(this); |
13cb5f43 FC |
195 | fParser = trace.fParser; |
196 | initialize(trace.getResource(), trace.getPath(), trace.getEventType()); | |
3791b5df FC |
197 | } |
198 | ||
7e6347b0 FC |
199 | // ------------------------------------------------------------------------ |
200 | // ITmfTrace - Initializers | |
201 | // ------------------------------------------------------------------------ | |
202 | ||
203 | /* (non-Javadoc) | |
204 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#initTrace(org.eclipse.core.resources.IResource, java.lang.String, java.lang.Class) | |
205 | */ | |
206 | @Override | |
b4f71e4a | 207 | public void initTrace(final IResource resource, final String path, final Class<T> type) throws TmfTraceException { |
7e6347b0 FC |
208 | initialize(resource, path, type); |
209 | fIndexer.buildIndex(false); | |
210 | } | |
211 | ||
09e86496 | 212 | /** |
1703b536 FC |
213 | * Initialize the trace common attributes and the base component. |
214 | * | |
215 | * @param resource the Eclipse resource (trace) | |
216 | * @param path the trace path | |
217 | * @param type the trace event type | |
218 | * | |
09e86496 | 219 | * @throws FileNotFoundException |
3791b5df | 220 | */ |
b4f71e4a | 221 | protected void initialize(final IResource resource, final String path, final Class<T> type) throws TmfTraceException { |
1703b536 | 222 | if (path == null) |
b4f71e4a | 223 | throw new TmfTraceException("Invalid trace path"); //$NON-NLS-1$ |
3791b5df | 224 | fPath = path; |
1703b536 | 225 | fResource = resource; |
25e48683 | 226 | String traceName = (resource != null) ? resource.getName() : null; |
1703b536 FC |
227 | // If no resource was provided, extract the display name the trace path |
228 | if (traceName == null) { | |
229 | final int sep = path.lastIndexOf(Path.SEPARATOR); | |
230 | traceName = (sep >= 0) ? path.substring(sep + 1) : path; | |
231 | } | |
b4f71e4a FC |
232 | if (fParser == null && !(this instanceof ITmfEventParser)) |
233 | throw new TmfTraceException("Invalid trace parser"); //$NON-NLS-1$ | |
3791b5df FC |
234 | super.init(traceName, type); |
235 | } | |
236 | ||
09e86496 FC |
237 | /* (non-Javadoc) |
238 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#validate(org.eclipse.core.resources.IProject, java.lang.String) | |
20658947 FC |
239 | * |
240 | * Default validation: make sure the trace file exists. | |
3791b5df FC |
241 | */ |
242 | @Override | |
085d898f FC |
243 | public boolean validate(final IProject project, final String path) { |
244 | final File file = new File(path); | |
3791b5df FC |
245 | return file.exists(); |
246 | } | |
247 | ||
3791b5df | 248 | // ------------------------------------------------------------------------ |
09e86496 | 249 | // ITmfTrace - Basic getters |
e31e01e8 | 250 | // ------------------------------------------------------------------------ |
8c8bf09f | 251 | |
09e86496 | 252 | /* (non-Javadoc) |
13cb5f43 | 253 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getEventType() |
25e48683 FC |
254 | */ |
255 | @Override | |
09e86496 | 256 | @SuppressWarnings("unchecked") |
13cb5f43 | 257 | public Class<T> getEventType() { |
09e86496 | 258 | return (Class<T>) super.getType(); |
25e48683 FC |
259 | } |
260 | ||
09e86496 FC |
261 | /* (non-Javadoc) |
262 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getResource() | |
62d1696a | 263 | */ |
d4011df2 | 264 | @Override |
09e86496 FC |
265 | public IResource getResource() { |
266 | return fResource; | |
8c8bf09f ASL |
267 | } |
268 | ||
09e86496 FC |
269 | /* (non-Javadoc) |
270 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getPath() | |
62d1696a | 271 | */ |
d4011df2 | 272 | @Override |
09e86496 FC |
273 | public String getPath() { |
274 | return fPath; | |
8c8bf09f ASL |
275 | } |
276 | ||
20658947 FC |
277 | /* (non-Javadoc) |
278 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getIndexPageSize() | |
279 | */ | |
280 | @Override | |
281 | public int getCacheSize() { | |
282 | return fCacheSize; | |
283 | } | |
284 | ||
285 | /* (non-Javadoc) | |
286 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getStreamingInterval() | |
287 | */ | |
288 | @Override | |
289 | public long getStreamingInterval() { | |
290 | return fStreamingInterval; | |
291 | } | |
292 | ||
09e86496 FC |
293 | // ------------------------------------------------------------------------ |
294 | // ITmfTrace - Trace characteristics getters | |
295 | // ------------------------------------------------------------------------ | |
296 | ||
297 | /* (non-Javadoc) | |
298 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getNbEvents() | |
b0a282fb | 299 | */ |
d4011df2 | 300 | @Override |
afc86f78 | 301 | public synchronized long getNbEvents() { |
3791b5df | 302 | return fNbEvents; |
b0a282fb FC |
303 | } |
304 | ||
09e86496 FC |
305 | /* (non-Javadoc) |
306 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getTimeRange() | |
62d1696a | 307 | */ |
d4011df2 | 308 | @Override |
12c155f5 | 309 | public TmfTimeRange getTimeRange() { |
cb866e08 | 310 | return new TmfTimeRange(fStartTime, fEndTime); |
8c8bf09f ASL |
311 | } |
312 | ||
09e86496 FC |
313 | /* (non-Javadoc) |
314 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getStartTime() | |
e31e01e8 | 315 | */ |
d4011df2 | 316 | @Override |
4df4581d | 317 | public ITmfTimestamp getStartTime() { |
20658947 | 318 | return fStartTime.clone(); |
146a887c FC |
319 | } |
320 | ||
09e86496 FC |
321 | /* (non-Javadoc) |
322 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#getEndTime() | |
e31e01e8 | 323 | */ |
d4011df2 | 324 | @Override |
4df4581d | 325 | public ITmfTimestamp getEndTime() { |
20658947 FC |
326 | return fEndTime.clone(); |
327 | } | |
328 | ||
329 | // ------------------------------------------------------------------------ | |
330 | // Convenience setters | |
331 | // ------------------------------------------------------------------------ | |
332 | ||
333 | /** | |
334 | * Update the trace events time range | |
335 | * | |
336 | * @param range the new time range | |
337 | */ | |
338 | protected void setTimeRange(final TmfTimeRange range) { | |
339 | fStartTime = range.getStartTime().clone(); | |
340 | fEndTime = range.getEndTime().clone(); | |
341 | } | |
342 | ||
343 | /** | |
344 | * Update the trace chronologically first event timestamp | |
345 | * | |
346 | * @param startTime the new first event timestamp | |
347 | */ | |
348 | protected void setStartTime(final ITmfTimestamp startTime) { | |
349 | fStartTime = startTime.clone(); | |
350 | } | |
351 | ||
352 | /** | |
353 | * Update the trace chronologically last event timestamp | |
354 | * | |
355 | * @param endTime the new last event timestamp | |
356 | */ | |
357 | protected void setEndTime(final ITmfTimestamp endTime) { | |
358 | fEndTime = endTime.clone(); | |
359 | } | |
360 | ||
361 | /** | |
362 | * Update the trace streaming interval | |
363 | * | |
364 | * @param interval the new trace streaming interval | |
365 | */ | |
366 | protected void setStreamingInterval(final long interval) { | |
1703b536 | 367 | fStreamingInterval = (interval > 0) ? interval : 0; |
146a887c FC |
368 | } |
369 | ||
09e86496 | 370 | // ------------------------------------------------------------------------ |
7e6347b0 | 371 | // ITmfTrace - SeekEvent operations (returning a trace context) |
09e86496 FC |
372 | // ------------------------------------------------------------------------ |
373 | ||
374 | /* (non-Javadoc) | |
7e6347b0 | 375 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#seekEvent(long) |
1b70b6dc PT |
376 | */ |
377 | @Override | |
7e6347b0 | 378 | public synchronized ITmfContext seekEvent(final long rank) { |
09e86496 | 379 | |
7e6347b0 FC |
380 | // A rank <= 0 indicates to seek the first event |
381 | if (rank <= 0) | |
382 | return seekEvent((ITmfLocation<?>) null); | |
09e86496 | 383 | |
09e86496 | 384 | // Position the trace at the checkpoint |
7e6347b0 | 385 | final ITmfContext context = fIndexer.seekIndex(rank); |
09e86496 FC |
386 | |
387 | // And locate the requested event context | |
7e6347b0 FC |
388 | long pos = context.getRank(); |
389 | if (pos < rank) { | |
b4f71e4a | 390 | ITmfEvent event = readNextEvent(context); |
7e6347b0 | 391 | while (event != null && ++pos < rank) { |
b4f71e4a | 392 | event = readNextEvent(context); |
7e6347b0 | 393 | } |
09e86496 FC |
394 | } |
395 | return context; | |
1b70b6dc PT |
396 | } |
397 | ||
09e86496 | 398 | /* (non-Javadoc) |
7e6347b0 | 399 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#seekEvent(org.eclipse.linuxtools.tmf.core.event.ITmfTimestamp) |
09e86496 FC |
400 | */ |
401 | @Override | |
7e6347b0 | 402 | public synchronized ITmfContext seekEvent(final ITmfTimestamp timestamp) { |
09e86496 | 403 | |
7e6347b0 FC |
404 | // A null timestamp indicates to seek the first event |
405 | if (timestamp == null) | |
406 | return seekEvent(0); | |
09e86496 | 407 | |
1703b536 | 408 | // Position the trace at the checkpoint |
7e6347b0 | 409 | final ITmfContext context = fIndexer.seekIndex(timestamp); |
09e86496 FC |
410 | |
411 | // And locate the requested event context | |
7e6347b0 | 412 | final ITmfContext nextEventContext = context.clone(); // Must use clone() to get the right subtype... |
b4f71e4a | 413 | ITmfEvent event = readNextEvent(nextEventContext); |
7e6347b0 FC |
414 | while (event != null && event.getTimestamp().compareTo(timestamp, false) < 0) { |
415 | context.setLocation(nextEventContext.getLocation().clone()); | |
416 | context.increaseRank(); | |
b4f71e4a | 417 | event = readNextEvent(nextEventContext); |
09e86496 FC |
418 | } |
419 | return context; | |
420 | } | |
421 | ||
09e86496 FC |
422 | // ------------------------------------------------------------------------ |
423 | // ITmfTrace - Read operations (returning an actual event) | |
424 | // ------------------------------------------------------------------------ | |
425 | ||
d337369a | 426 | /* (non-Javadoc) |
b4f71e4a | 427 | * @see org.eclipse.linuxtools.tmf.core.trace.ITmfTrace#readNextEvent(org.eclipse.linuxtools.tmf.core.trace.ITmfContext) |
abfad0aa | 428 | */ |
d4011df2 | 429 | @Override |
b4f71e4a | 430 | public synchronized ITmfEvent readNextEvent(final ITmfContext context) { |
09e86496 | 431 | // parseEvent() does not update the context |
7e6347b0 | 432 | final ITmfEvent event = fParser.parseEvent(context); |
09e86496 | 433 | if (event != null) { |
d337369a | 434 | updateAttributes(context, event.getTimestamp()); |
09e86496 FC |
435 | context.setLocation(getCurrentLocation()); |
436 | context.increaseRank(); | |
437 | processEvent(event); | |
438 | } | |
439 | return event; | |
440 | } | |
441 | ||
442 | /** | |
d337369a | 443 | * Hook for special event processing by the concrete class |
7e6347b0 | 444 | * (called by TmfTrace.getEvent()) |
09e86496 | 445 | * |
d337369a | 446 | * @param event the event |
09e86496 FC |
447 | */ |
448 | protected void processEvent(final ITmfEvent event) { | |
d337369a | 449 | // Do nothing |
09e86496 FC |
450 | } |
451 | ||
d337369a FC |
452 | /** |
453 | * Update the trace attributes | |
454 | * | |
455 | * @param context the current trace context | |
456 | * @param rank | |
457 | * @param timestamp | |
458 | */ | |
459 | protected synchronized void updateAttributes(final ITmfContext context, final ITmfTimestamp timestamp) { | |
09e86496 FC |
460 | if (fStartTime.compareTo(timestamp, false) > 0) { |
461 | fStartTime = timestamp; | |
462 | } | |
463 | if (fEndTime.compareTo(timestamp, false) < 0) { | |
464 | fEndTime = timestamp; | |
465 | } | |
466 | if (context.hasValidRank()) { | |
d337369a | 467 | long rank = context.getRank(); |
09e86496 FC |
468 | if (fNbEvents <= rank) { |
469 | fNbEvents = rank + 1; | |
470 | } | |
d337369a | 471 | fIndexer.updateIndex(context, timestamp); |
09e86496 | 472 | } |
abfad0aa FC |
473 | } |
474 | ||
3791b5df | 475 | // ------------------------------------------------------------------------ |
d337369a | 476 | // TmfDataProvider |
3791b5df FC |
477 | // ------------------------------------------------------------------------ |
478 | ||
d337369a FC |
479 | /* (non-Javadoc) |
480 | * @see org.eclipse.linuxtools.tmf.core.component.TmfDataProvider#armRequest(org.eclipse.linuxtools.tmf.core.request.ITmfDataRequest) | |
481 | */ | |
3791b5df | 482 | @Override |
085d898f | 483 | public ITmfContext armRequest(final ITmfDataRequest<T> request) { |
3791b5df | 484 | if (request instanceof ITmfEventRequest<?> |
25e48683 FC |
485 | && !TmfTimestamp.BIG_BANG.equals(((ITmfEventRequest<T>) request).getRange().getStartTime()) |
486 | && request.getIndex() == 0) { | |
085d898f | 487 | final ITmfContext context = seekEvent(((ITmfEventRequest<T>) request).getRange().getStartTime()); |
3791b5df FC |
488 | ((ITmfEventRequest<T>) request).setStartIndex((int) context.getRank()); |
489 | return context; | |
490 | ||
491 | } | |
492 | return seekEvent(request.getIndex()); | |
493 | } | |
494 | ||
d337369a FC |
495 | /* (non-Javadoc) |
496 | * @see org.eclipse.linuxtools.tmf.core.component.TmfDataProvider#getNext(org.eclipse.linuxtools.tmf.core.trace.ITmfContext) | |
3791b5df | 497 | */ |
3791b5df | 498 | @Override |
20658947 | 499 | @SuppressWarnings("unchecked") |
085d898f FC |
500 | public T getNext(final ITmfContext context) { |
501 | if (context instanceof TmfContext) | |
b4f71e4a | 502 | return (T) readNextEvent(context); |
3791b5df FC |
503 | return null; |
504 | } | |
505 | ||
09e86496 | 506 | |
3791b5df | 507 | // ------------------------------------------------------------------------ |
09e86496 | 508 | // toString |
3791b5df FC |
509 | // ------------------------------------------------------------------------ |
510 | ||
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511 | /* (non-Javadoc) |
512 | * @see java.lang.Object#toString() | |
513 | */ | |
12c155f5 | 514 | @Override |
09e86496 | 515 | @SuppressWarnings("nls") |
afc86f78 | 516 | public synchronized String toString() { |
20658947 FC |
517 | return "TmfTrace [fPath=" + fPath + ", fCacheSize=" + fCacheSize |
518 | + ", fNbEvents=" + fNbEvents + ", fStartTime=" + fStartTime | |
519 | + ", fEndTime=" + fEndTime + ", fStreamingInterval=" + fStreamingInterval + "]"; | |
12c155f5 FC |
520 | } |
521 | ||
8c8bf09f | 522 | } |