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1 | /******************************************************************************* |
2 | * Copyright (c) 2014 Ecole Polytechnique de Montreal | |
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 | * Florian Wininger - Initial API and implementation | |
11 | ******************************************************************************/ | |
12 | ||
2bdf0193 | 13 | package org.eclipse.tracecompass.tmf.analysis.xml.core.model; |
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14 | |
15 | import java.util.List; | |
16 | ||
17 | import org.eclipse.jdt.annotation.NonNull; | |
18 | import org.eclipse.jdt.annotation.Nullable; | |
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19 | import org.eclipse.tracecompass.statesystem.core.ITmfStateSystem; |
20 | import org.eclipse.tracecompass.statesystem.core.exceptions.AttributeNotFoundException; | |
21 | import org.eclipse.tracecompass.statesystem.core.exceptions.StateValueTypeException; | |
22 | import org.eclipse.tracecompass.statesystem.core.exceptions.TimeRangeException; | |
23 | import org.eclipse.tracecompass.statesystem.core.statevalue.ITmfStateValue; | |
24 | import org.eclipse.tracecompass.statesystem.core.statevalue.TmfStateValue; | |
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25 | import org.eclipse.tracecompass.tmf.analysis.xml.core.module.IXmlStateSystemContainer; |
26 | import org.eclipse.tracecompass.tmf.analysis.xml.core.stateprovider.TmfXmlStrings; | |
27 | import org.eclipse.tracecompass.tmf.core.event.ITmfEvent; | |
28 | import org.eclipse.tracecompass.tmf.core.event.ITmfEventField; | |
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29 | import org.eclipse.tracecompass.tmf.core.event.aspect.TmfCpuAspect; |
30 | import org.eclipse.tracecompass.tmf.core.trace.TmfTraceUtils; | |
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31 | import org.w3c.dom.Element; |
32 | ||
33 | /** | |
34 | * This Class implements a State Value in the XML-defined state system, along | |
35 | * with the path to get to the value (either a list of state attributes or an | |
36 | * event field) | |
37 | * | |
38 | * <pre> | |
39 | * Example: | |
40 | * <stateAttribute type="location" value="CurrentThread" /> | |
41 | * <stateAttribute type="constant" value="System_call" /> | |
42 | * <stateValue type="null" /> | |
43 | * </pre> | |
44 | * | |
45 | * @author Florian Wininger | |
46 | */ | |
47 | public abstract class TmfXmlStateValue implements ITmfXmlStateValue { | |
48 | ||
49 | private final TmfXmlStateValueBase fStateValue; | |
50 | ||
51 | /* Path in the State System */ | |
52 | private final List<ITmfXmlStateAttribute> fPath; | |
53 | /* Event field to match with this state value */ | |
12685851 | 54 | private final @Nullable String fEventField; |
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55 | |
56 | /* Whether this state value is an increment of the previous value */ | |
57 | private final boolean fIncrement; | |
58 | /* Stack value */ | |
59 | private final ValueTypeStack fStackType; | |
60 | /* Forced value type */ | |
61 | private final ITmfStateValue.Type fForcedType; | |
62 | ||
63 | private final IXmlStateSystemContainer fContainer; | |
64 | ||
65 | /** | |
66 | * Different behaviors of an attribute that is to be stacked | |
67 | */ | |
68 | protected enum ValueTypeStack { | |
69 | /** Not stacked */ | |
70 | NULL, | |
71 | /** Peek at the value at the top of the stack */ | |
72 | PEEK, | |
73 | /** Take the value at the top of the stack */ | |
74 | POP, | |
75 | /** Push the value on the stack */ | |
76 | PUSH; | |
77 | ||
78 | /** | |
79 | * Get the type stack value corresponding to a string | |
80 | * | |
81 | * @param input | |
82 | * The string to match to a value | |
83 | * @return The ValueTypeStack value | |
84 | */ | |
85 | public static ValueTypeStack getTypeFromString(String input) { | |
86 | switch (input) { | |
87 | case TmfXmlStrings.STACK_PUSH: | |
88 | return PUSH; | |
89 | case TmfXmlStrings.STACK_POP: | |
90 | return POP; | |
91 | case TmfXmlStrings.STACK_PEEK: | |
92 | return PEEK; | |
93 | default: | |
94 | return NULL; | |
95 | } | |
96 | } | |
97 | } | |
98 | ||
99 | /** | |
100 | * Constructor | |
101 | * | |
102 | * @param modelFactory | |
103 | * The factory used to create XML model elements | |
104 | * @param node | |
105 | * The state value XML element | |
106 | * @param container | |
107 | * The state system container this state value belongs to | |
108 | * @param eventField | |
109 | * The event field where to get the value | |
110 | * @param attributes | |
111 | * The attributes representing the path to this value | |
112 | */ | |
12685851 | 113 | protected TmfXmlStateValue(ITmfXmlModelFactory modelFactory, Element node, IXmlStateSystemContainer container, List<ITmfXmlStateAttribute> attributes, @Nullable String eventField) { |
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114 | fPath = attributes; |
115 | fContainer = container; | |
116 | fEventField = eventField; | |
117 | if (!node.getNodeName().equals(TmfXmlStrings.STATE_VALUE)) { | |
118 | throw new IllegalArgumentException("TmfXmlStateValue constructor: Element is not a stateValue"); //$NON-NLS-1$ | |
119 | } | |
120 | ||
121 | /* Check if there is an increment for the value */ | |
122 | fIncrement = Boolean.parseBoolean(node.getAttribute(TmfXmlStrings.INCREMENT)); | |
123 | ||
124 | /* Process the XML Element state value */ | |
125 | fStateValue = initializeStateValue(modelFactory, node); | |
126 | ||
127 | /* | |
128 | * Forced type allows to convert the value to a certain type : For | |
129 | * example, a process's TID in an event field may arrive with a LONG | |
130 | * format but we want to store the data in an INT | |
131 | */ | |
132 | switch (node.getAttribute(TmfXmlStrings.FORCED_TYPE)) { | |
133 | case TmfXmlStrings.TYPE_STRING: | |
134 | fForcedType = ITmfStateValue.Type.STRING; | |
135 | break; | |
136 | case TmfXmlStrings.TYPE_INT: | |
137 | fForcedType = ITmfStateValue.Type.INTEGER; | |
138 | break; | |
139 | case TmfXmlStrings.TYPE_LONG: | |
140 | fForcedType = ITmfStateValue.Type.LONG; | |
141 | break; | |
142 | default: | |
143 | fForcedType = ITmfStateValue.Type.NULL; | |
144 | } | |
145 | ||
146 | /* | |
147 | * Stack Actions : allow to define a stack with PUSH/POP/PEEK methods | |
148 | */ | |
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149 | @SuppressWarnings("null") |
150 | @NonNull String stack = node.getAttribute(TmfXmlStrings.ATTRIBUTE_STACK); | |
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151 | fStackType = ValueTypeStack.getTypeFromString(stack); |
152 | } | |
153 | ||
154 | /** | |
155 | * Initialize a {@link TmfXmlStateValueBase} object for the type and value | |
156 | * | |
157 | * @param modelFactory | |
158 | * The factory used to create XML model elements | |
159 | * @param node | |
160 | * The state value XML element | |
161 | * @return The internal state value type corresponding to this state value | |
162 | */ | |
163 | protected TmfXmlStateValueBase initializeStateValue(ITmfXmlModelFactory modelFactory, Element node) { | |
164 | return new TmfXmlStateValueNull(); | |
165 | } | |
166 | ||
167 | /** | |
168 | * Return the state system container this class is attached to | |
169 | * | |
170 | * @return The state system container | |
171 | */ | |
172 | protected IXmlStateSystemContainer getSsContainer() { | |
173 | return fContainer; | |
174 | } | |
175 | ||
176 | /** | |
177 | * Get the state system associated with this value's container | |
178 | * | |
179 | * @return The state system associated with the state system container | |
180 | */ | |
12685851 | 181 | protected @Nullable ITmfStateSystem getStateSystem() { |
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182 | return fContainer.getStateSystem(); |
183 | } | |
184 | ||
185 | /** | |
186 | * Return whether this value is an increment of the previous value | |
187 | * | |
188 | * @return <code>true</code> if the value is an increment | |
189 | */ | |
190 | protected boolean isIncrement() { | |
191 | return fIncrement; | |
192 | } | |
193 | ||
194 | /** | |
195 | * Get the stack type of this attribute. If the attribute is to be pushed or | |
196 | * popped to a stack. The behavior of the stack attribute will depend on the | |
197 | * implementation of the model. | |
198 | * | |
199 | * @return The stack type of the attribute | |
200 | */ | |
201 | protected ValueTypeStack getStackType() { | |
202 | return fStackType; | |
203 | } | |
204 | ||
205 | /** | |
206 | * Get the forced type of the value. For example, if the value obtained from | |
207 | * the attributes is not in this forced type, it will be converted to this. | |
208 | * | |
209 | * @return The desired type of the value | |
210 | */ | |
211 | protected ITmfStateValue.Type getForcedType() { | |
212 | return fForcedType; | |
213 | } | |
214 | ||
215 | /** | |
216 | * Get the current {@link ITmfStateValue} of this state value for an event. | |
217 | * It does not increment the value and does not any other processing of the | |
218 | * value. | |
219 | * | |
220 | * @param event | |
221 | * The current event, or <code>null</code> if no event available. | |
222 | * @return the {@link ITmfStateValue} | |
223 | * @throws AttributeNotFoundException | |
224 | * May be thrown by the state system during the query | |
225 | */ | |
226 | @Override | |
227 | public ITmfStateValue getValue(@Nullable ITmfEvent event) throws AttributeNotFoundException { | |
228 | return fStateValue.getValue(event); | |
229 | } | |
230 | ||
231 | /** | |
232 | * Get the value of the event field that is the path of this state value | |
233 | * | |
234 | * @param event | |
235 | * The current event | |
236 | * @return the value of the event field | |
237 | */ | |
238 | @Override | |
239 | public ITmfStateValue getEventFieldValue(@NonNull ITmfEvent event) { | |
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240 | String eventField = fEventField; |
241 | if (eventField == null) { | |
242 | throw new IllegalStateException(); | |
243 | } | |
244 | return getEventFieldValue(event, eventField); | |
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245 | } |
246 | ||
247 | /** | |
248 | * Get the value of an event field | |
249 | * | |
250 | * @param event | |
251 | * The current event | |
252 | * @param fieldName | |
253 | * The name of the field of which to get the value | |
254 | * @return The value of the event field | |
255 | */ | |
12685851 | 256 | protected ITmfStateValue getEventFieldValue(ITmfEvent event, String fieldName) { |
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257 | |
258 | ITmfStateValue value = TmfStateValue.nullValue(); | |
259 | ||
260 | final ITmfEventField content = event.getContent(); | |
261 | ||
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262 | /* Exception for "CPU", returns the source of this event */ |
263 | /* FIXME : Nameclash if a eventfield have "cpu" for name. */ | |
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264 | if (fieldName.equals(TmfXmlStrings.CPU)) { |
265 | /* See if the event advertises a CPU aspect */ | |
266 | Iterable<TmfCpuAspect> cpuAspects = TmfTraceUtils.getEventAspectsOfClass( | |
267 | event.getTrace(), TmfCpuAspect.class); | |
268 | for (TmfCpuAspect aspect : cpuAspects) { | |
269 | /* We will just pick the first valid one we find */ | |
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270 | Integer cpu = aspect.resolve(event); |
271 | if (!cpu.equals(TmfCpuAspect.CPU_UNAVAILABLE)) { | |
272 | return TmfStateValue.newValueInt(cpu.intValue()); | |
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273 | } |
274 | } | |
275 | } | |
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276 | /* Exception also for "TIMESTAMP", returns the timestamp of this event */ |
277 | if (fieldName.equals(TmfXmlStrings.TIMESTAMP)) { | |
278 | return TmfStateValue.newValueLong(event.getTimestamp().getValue()); | |
279 | } | |
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280 | if (content.getField(fieldName) == null) { |
281 | return value; | |
282 | } | |
283 | ||
284 | Object field = content.getField(fieldName).getValue(); | |
285 | ||
286 | /* | |
287 | * Try to find the right type. The type can be forced by | |
288 | * "forcedType" argument. | |
289 | */ | |
290 | ||
291 | if (field instanceof String) { | |
292 | String fieldString = (String) field; | |
293 | ||
294 | switch (fForcedType) { | |
295 | case INTEGER: | |
296 | value = TmfStateValue.newValueInt(Integer.parseInt(fieldString)); | |
297 | break; | |
298 | case LONG: | |
299 | value = TmfStateValue.newValueLong(Long.parseLong(fieldString)); | |
300 | break; | |
301 | case DOUBLE: | |
302 | value = TmfStateValue.newValueDouble(Double.parseDouble(fieldString)); | |
303 | break; | |
304 | case NULL: | |
305 | case STRING: | |
306 | default: | |
307 | value = TmfStateValue.newValueString(fieldString); | |
308 | break; | |
309 | } | |
310 | } else if (field instanceof Long) { | |
311 | Long fieldLong = (Long) field; | |
312 | ||
313 | switch (fForcedType) { | |
314 | case INTEGER: | |
315 | value = TmfStateValue.newValueInt(fieldLong.intValue()); | |
316 | break; | |
317 | case STRING: | |
318 | value = TmfStateValue.newValueString(fieldLong.toString()); | |
319 | break; | |
320 | case DOUBLE: | |
321 | value = TmfStateValue.newValueDouble(fieldLong.doubleValue()); | |
322 | break; | |
323 | case LONG: | |
324 | case NULL: | |
325 | default: | |
326 | value = TmfStateValue.newValueLong(fieldLong); | |
327 | break; | |
328 | } | |
329 | } else if (field instanceof Integer) { | |
330 | Integer fieldInteger = (Integer) field; | |
331 | ||
332 | switch (fForcedType) { | |
333 | case LONG: | |
334 | value = TmfStateValue.newValueLong(fieldInteger.longValue()); | |
335 | break; | |
336 | case STRING: | |
337 | value = TmfStateValue.newValueString(fieldInteger.toString()); | |
338 | break; | |
339 | case DOUBLE: | |
340 | value = TmfStateValue.newValueDouble(fieldInteger.doubleValue()); | |
341 | break; | |
342 | case INTEGER: | |
343 | case NULL: | |
344 | default: | |
345 | value = TmfStateValue.newValueInt(fieldInteger); | |
346 | break; | |
347 | } | |
348 | } else if (field instanceof Double) { | |
349 | Double fieldDouble = (Double) field; | |
350 | ||
351 | switch (fForcedType) { | |
352 | case LONG: | |
353 | value = TmfStateValue.newValueLong(fieldDouble.longValue()); | |
354 | break; | |
355 | case STRING: | |
356 | value = TmfStateValue.newValueString(fieldDouble.toString()); | |
357 | break; | |
358 | case INTEGER: | |
359 | value = TmfStateValue.newValueInt(fieldDouble.intValue()); | |
360 | break; | |
361 | case DOUBLE: | |
362 | case NULL: | |
363 | default: | |
364 | value = TmfStateValue.newValueDouble(fieldDouble); | |
365 | break; | |
366 | } | |
367 | } | |
368 | return value; | |
369 | } | |
370 | ||
371 | /** | |
372 | * Get the list of state attributes, the path to the state value | |
373 | * | |
374 | * @return the list of Attribute to have the path in the State System | |
375 | */ | |
376 | @Override | |
377 | public List<ITmfXmlStateAttribute> getAttributes() { | |
378 | return fPath; | |
379 | } | |
380 | ||
381 | /** | |
382 | * Handles an event, by setting the value of the attribute described by the | |
383 | * state attribute path in the state system. | |
384 | * | |
385 | * @param event | |
386 | * The event to process | |
387 | * @throws AttributeNotFoundException | |
388 | * Pass through the exception it received | |
389 | * @throws TimeRangeException | |
390 | * Pass through the exception it received | |
391 | * @throws StateValueTypeException | |
392 | * Pass through the exception it received | |
393 | */ | |
394 | @Override | |
395 | public void handleEvent(@NonNull ITmfEvent event) throws AttributeNotFoundException, StateValueTypeException, TimeRangeException { | |
396 | int quark = IXmlStateSystemContainer.ROOT_QUARK; | |
397 | ||
398 | for (ITmfXmlStateAttribute attribute : fPath) { | |
399 | quark = attribute.getAttributeQuark(event, quark); | |
400 | /* the query is not valid, we stop the state change */ | |
401 | if (quark == IXmlStateSystemContainer.ERROR_QUARK) { | |
446598f9 | 402 | throw new AttributeNotFoundException("Not found XML attribute " + attribute); //$NON-NLS-1$ |
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403 | } |
404 | } | |
405 | ||
406 | long ts = event.getTimestamp().getValue(); | |
407 | fStateValue.handleEvent(event, quark, ts); | |
408 | } | |
409 | ||
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410 | @Override |
411 | public String toString() { | |
412 | return "TmfXmlStateValue: " + fStateValue; //$NON-NLS-1$ | |
413 | } | |
414 | ||
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415 | /** |
416 | * Base class for all state values. Contain default methods to handle event, | |
417 | * process or increment the value | |
418 | */ | |
419 | protected abstract class TmfXmlStateValueBase { | |
420 | ||
421 | /** | |
422 | * Get the value associated with this state value. | |
423 | * | |
424 | * @param event | |
425 | * The event which can be used to retrieve the value if | |
426 | * necessary. The event can be <code>null</code> if no event | |
427 | * is required. | |
428 | * @return The state value corresponding to this XML state value | |
429 | * @throws AttributeNotFoundException | |
430 | * Pass through the exception it received | |
431 | */ | |
432 | public abstract ITmfStateValue getValue(@Nullable ITmfEvent event) throws AttributeNotFoundException; | |
433 | ||
434 | /** | |
435 | * Do something with the state value, possibly using an event | |
436 | * | |
437 | * @param event | |
438 | * The event being handled. If there is no event is | |
439 | * available, use <code>null</code>. | |
440 | * @param quark | |
441 | * The quark for this value | |
442 | * @param timestamp | |
443 | * The timestamp of the event | |
444 | * @throws StateValueTypeException | |
445 | * Pass through the exception it received | |
446 | * @throws TimeRangeException | |
447 | * Pass through the exception it received | |
448 | * @throws AttributeNotFoundException | |
449 | * Pass through the exception it received | |
450 | */ | |
12685851 | 451 | public void handleEvent(ITmfEvent event, int quark, long timestamp) throws StateValueTypeException, TimeRangeException, AttributeNotFoundException { |
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452 | if (fIncrement) { |
453 | incrementValue(event, quark, timestamp); | |
454 | } else { | |
455 | ITmfStateValue value = getValue(event); | |
456 | processValue(quark, timestamp, value); | |
457 | } | |
458 | } | |
459 | ||
460 | /** | |
461 | * Set the value of a quark at a given timestamp. | |
462 | * | |
463 | * @param quark | |
464 | * The quark for this value | |
465 | * @param timestamp | |
466 | * The timestamp | |
467 | * @param value | |
468 | * The value of this state value | |
469 | * @throws TimeRangeException | |
470 | * Pass through the exception it received | |
471 | * @throws StateValueTypeException | |
472 | * Pass through the exception it received | |
473 | * @throws AttributeNotFoundException | |
474 | * Pass through the exception it received | |
475 | */ | |
476 | @SuppressWarnings("unused") | |
477 | protected void processValue(int quark, long timestamp, ITmfStateValue value) throws TimeRangeException, StateValueTypeException, AttributeNotFoundException { | |
478 | } | |
479 | ||
480 | /** | |
481 | * Increments the value of the parameter | |
482 | * | |
483 | * @param event | |
484 | * The event being handled | |
485 | * @param quark | |
486 | * The quark for this value | |
487 | * @param timestamp | |
488 | * The timestamp of the event | |
489 | * @throws StateValueTypeException | |
490 | * Pass through the exception it received | |
491 | * @throws TimeRangeException | |
492 | * Pass through the exception it received | |
493 | * @throws AttributeNotFoundException | |
494 | * Pass through the exception it received | |
495 | */ | |
496 | @SuppressWarnings("unused") | |
497 | protected void incrementValue(ITmfEvent event, int quark, long timestamp) throws StateValueTypeException, TimeRangeException, AttributeNotFoundException { | |
498 | } | |
499 | } | |
500 | ||
501 | /* This state value uses a constant value, defined in the XML */ | |
502 | private class TmfXmlStateValueNull extends TmfXmlStateValueBase { | |
503 | ||
504 | @Override | |
505 | public ITmfStateValue getValue(@Nullable ITmfEvent event) throws AttributeNotFoundException { | |
506 | return TmfStateValue.nullValue(); | |
507 | } | |
508 | ||
509 | } | |
510 | ||
52293ccd | 511 | } |