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| 1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 library analyzer.src.task.inputs; | |
| 6 | |
| 7 import 'dart:collection'; | |
| 8 | |
| 9 import 'package:analyzer/task/model.dart'; | |
| 10 | |
| 11 /** | |
| 12 * A function that converts an object of the type [B] into a [TaskInput]. | |
| 13 * This is used, for example, by a [ListToListTaskInput] to create task inputs | |
| 14 * for each value in a list of values. | |
| 15 */ | |
| 16 typedef TaskInput<E> GenerateTaskInputs<B, E>(B object); | |
| 17 | |
| 18 /** | |
| 19 * A function that maps one [value] to another value. | |
| 20 */ | |
| 21 typedef R Mapper<P, R>(P value); | |
| 22 | |
| 23 /** | |
| 24 * An input to an [AnalysisTask] that is computed by accessing a single result | |
| 25 * defined on a single target. | |
| 26 */ | |
| 27 class ListTaskInputImpl<E> extends SimpleTaskInput<List<E>> | |
| 28 with ListTaskInputMixin<E> implements ListTaskInput<E> { | |
| 29 /** | |
| 30 * Initialize a newly created task input that computes the input by accessing | |
| 31 * the given [result] associated with the given [target]. | |
| 32 */ | |
| 33 ListTaskInputImpl(AnalysisTarget target, ResultDescriptor<List<E>> result) | |
| 34 : super(target, result); | |
| 35 } | |
| 36 | |
| 37 /** | |
| 38 * A mixin-ready implementation of [ListTaskInput]. | |
| 39 */ | |
| 40 abstract class ListTaskInputMixin<E> implements ListTaskInput<E> { | |
| 41 ListTaskInput /*<V>*/ toList(UnaryFunction<E, dynamic /*<V>*/ > mapper) { | |
| 42 return new ListToListTaskInput<E, dynamic /*V*/ >(this, mapper); | |
| 43 } | |
| 44 | |
| 45 ListTaskInput /*<V>*/ toListOf(ResultDescriptor /*<V>*/ valueResult) { | |
| 46 return (this as ListTaskInputImpl<AnalysisTarget>).toList(valueResult.of); | |
| 47 } | |
| 48 | |
| 49 MapTaskInput<E, dynamic /*V*/ > toMap( | |
| 50 UnaryFunction<E, dynamic /*<V>*/ > mapper) { | |
| 51 return new ListToMapTaskInput<E, dynamic /*V*/ >(this, mapper); | |
| 52 } | |
| 53 | |
| 54 MapTaskInput<AnalysisTarget, dynamic /*V*/ > toMapOf( | |
| 55 ResultDescriptor /*<V>*/ valueResult) { | |
| 56 return (this as ListTaskInputImpl<AnalysisTarget>).toMap(valueResult.of); | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 /** | |
| 61 * An input to an [AnalysisTask] that is computed by the following steps. First | |
| 62 * another (base) task input is used to compute a [List]-valued result. An input | |
| 63 * generator function is then used to map each element of that list to a task | |
| 64 * input. Finally, each of the task inputs are used to access analysis results, | |
| 65 * and the list of the analysis results is used as the input to the task. | |
| 66 */ | |
| 67 class ListToListTaskInput<B, E> | |
| 68 extends _ListToCollectionTaskInput<B, E, List<E>> | |
| 69 with ListTaskInputMixin<E> { | |
| 70 /** | |
| 71 * Initialize a result accessor to use the given [baseAccessor] to access a | |
| 72 * list of values that can be passed to the given [generateTaskInputs] to | |
| 73 * generate a list of task inputs that can be used to access the elements of | |
| 74 * the input being accessed. | |
| 75 */ | |
| 76 ListToListTaskInput(TaskInput<List<B>> baseAccessor, | |
| 77 GenerateTaskInputs<B, E> generateTaskInputs) | |
| 78 : super(baseAccessor, generateTaskInputs); | |
| 79 | |
| 80 @override | |
| 81 TaskInputBuilder<List<E>> createBuilder() => | |
| 82 new ListToListTaskInputBuilder<B, E>(this); | |
| 83 } | |
| 84 | |
| 85 /** | |
| 86 * A [TaskInputBuilder] used to build an input based on a [ListToListTaskInput]. | |
| 87 */ | |
| 88 class ListToListTaskInputBuilder<B, E> | |
| 89 extends _ListToCollectionTaskInputBuilder<B, E, List<E>> { | |
| 90 /** | |
| 91 * The list of values being built. | |
| 92 */ | |
| 93 List<E> _resultValue; | |
| 94 | |
| 95 /** | |
| 96 * Initialize a newly created task input builder that computes the result | |
| 97 * specified by the given [input]. | |
| 98 */ | |
| 99 ListToListTaskInputBuilder(ListToListTaskInput<B, E> input) : super(input); | |
| 100 | |
| 101 @override | |
| 102 void _addResultElement(B baseElement, E resultElement) { | |
| 103 _resultValue.add(resultElement); | |
| 104 } | |
| 105 | |
| 106 @override | |
| 107 void _initResultValue() { | |
| 108 _resultValue = <E>[]; | |
| 109 } | |
| 110 } | |
| 111 | |
| 112 /** | |
| 113 * An input to an [AnalysisTask] that is computed by the following steps. First | |
| 114 * another (base) task input is used to compute a [List]-valued result. An input | |
| 115 * generator function is then used to map each element of that list to a task | |
| 116 * input. Finally, each of the task inputs are used to access analysis results, | |
| 117 * and the map of the base elements to the analysis results is used as the | |
| 118 * input to the task. | |
| 119 */ | |
| 120 class ListToMapTaskInput<B, E> | |
| 121 extends _ListToCollectionTaskInput<B, E, Map<B, E>> | |
| 122 with MapTaskInputMixin<B, E> { | |
| 123 /** | |
| 124 * Initialize a result accessor to use the given [baseAccessor] to access a | |
| 125 * list of values that can be passed to the given [generateTaskInputs] to | |
| 126 * generate a list of task inputs that can be used to access the elements of | |
| 127 * the input being accessed. | |
| 128 */ | |
| 129 ListToMapTaskInput(TaskInput<List<B>> baseAccessor, | |
| 130 GenerateTaskInputs<B, E> generateTaskInputs) | |
| 131 : super(baseAccessor, generateTaskInputs); | |
| 132 | |
| 133 @override | |
| 134 TaskInputBuilder<Map<B, E>> createBuilder() => | |
| 135 new ListToMapTaskInputBuilder<B, E>(this); | |
| 136 } | |
| 137 | |
| 138 /** | |
| 139 * A [TaskInputBuilder] used to build an input based on a [ListToMapTaskInput]. | |
| 140 */ | |
| 141 class ListToMapTaskInputBuilder<B, E> | |
| 142 extends _ListToCollectionTaskInputBuilder<B, E, Map<B, E>> { | |
| 143 /** | |
| 144 * The map being built. | |
| 145 */ | |
| 146 Map<B, E> _resultValue; | |
| 147 | |
| 148 /** | |
| 149 * Initialize a newly created task input builder that computes the result | |
| 150 * specified by the given [input]. | |
| 151 */ | |
| 152 ListToMapTaskInputBuilder(ListToMapTaskInput<B, E> input) : super(input); | |
| 153 | |
| 154 @override | |
| 155 void _addResultElement(B baseElement, E resultElement) { | |
| 156 _resultValue[baseElement] = resultElement; | |
| 157 } | |
| 158 | |
| 159 @override | |
| 160 void _initResultValue() { | |
| 161 _resultValue = new HashMap<B, E>(); | |
| 162 } | |
| 163 } | |
| 164 | |
| 165 /** | |
| 166 * A mixin-ready implementation of [MapTaskInput]. | |
| 167 */ | |
| 168 abstract class MapTaskInputMixin<K, V> implements MapTaskInput<K, V> { | |
| 169 TaskInput<List /*<E>*/ > toFlattenList( | |
| 170 BinaryFunction<K, dynamic /*element of V*/, dynamic /*<E>*/ > mapper) { | |
| 171 return new MapToFlattenListTaskInput<K, dynamic /*element of V*/, dynamic /*
E*/ >( | |
| 172 this as MapTaskInput<K, List /*<element of V>*/ >, mapper); | |
| 173 } | |
| 174 } | |
| 175 | |
| 176 /** | |
| 177 * A [TaskInput] that is computed by the following steps. | |
| 178 * | |
| 179 * First the [base] task input is used to compute a [Map]-valued result. | |
| 180 * The values of the [Map] must be [List]s. | |
| 181 * | |
| 182 * The given [mapper] is used to transform each key / value pair of the [Map] | |
| 183 * into task inputs. | |
| 184 * | |
| 185 * Finally, each of the task inputs are used to access analysis results, | |
| 186 * and the list of the results is used as the input. | |
| 187 */ | |
| 188 class MapToFlattenListTaskInput<K, V, E> extends TaskInputImpl<List<E>> { | |
| 189 final MapTaskInput<K, List<V>> base; | |
| 190 final BinaryFunction<K, V, E> mapper; | |
| 191 | |
| 192 MapToFlattenListTaskInput(this.base, this.mapper); | |
| 193 | |
| 194 @override | |
| 195 TaskInputBuilder<List<E>> createBuilder() { | |
| 196 return new MapToFlattenListTaskInputBuilder<K, V, E>(base, mapper); | |
| 197 } | |
| 198 } | |
| 199 | |
| 200 /** | |
| 201 * The [TaskInputBuilder] for [MapToFlattenListTaskInput]. | |
| 202 */ | |
| 203 class MapToFlattenListTaskInputBuilder<K, V, E> | |
| 204 implements TaskInputBuilder<List<E>> { | |
| 205 final MapTaskInput<K, List<V>> base; | |
| 206 final BinaryFunction<K, V, E> mapper; | |
| 207 | |
| 208 TaskInputBuilder currentBuilder; | |
| 209 Map<K, List<V>> baseMap; | |
| 210 Iterator<K> keyIterator; | |
| 211 Iterator<V> valueIterator; | |
| 212 | |
| 213 final List<E> inputValue = <E>[]; | |
| 214 | |
| 215 MapToFlattenListTaskInputBuilder(this.base, this.mapper) { | |
| 216 currentBuilder = base.createBuilder(); | |
| 217 } | |
| 218 | |
| 219 @override | |
| 220 ResultDescriptor get currentResult { | |
| 221 if (currentBuilder == null) { | |
| 222 return null; | |
| 223 } | |
| 224 return currentBuilder.currentResult; | |
| 225 } | |
| 226 | |
| 227 AnalysisTarget get currentTarget { | |
| 228 if (currentBuilder == null) { | |
| 229 return null; | |
| 230 } | |
| 231 return currentBuilder.currentTarget; | |
| 232 } | |
| 233 | |
| 234 @override | |
| 235 void set currentValue(Object value) { | |
| 236 if (currentBuilder == null) { | |
| 237 throw new StateError( | |
| 238 'Cannot set the result value when there is no current result'); | |
| 239 } | |
| 240 currentBuilder.currentValue = value; | |
| 241 } | |
| 242 | |
| 243 @override | |
| 244 void currentValueNotAvailable() { | |
| 245 if (currentBuilder == null) { | |
| 246 throw new StateError( | |
| 247 'Cannot set the result value when there is no current result'); | |
| 248 } | |
| 249 currentBuilder.currentValueNotAvailable(); | |
| 250 } | |
| 251 | |
| 252 @override | |
| 253 bool moveNext() { | |
| 254 // Prepare base Map. | |
| 255 if (baseMap == null) { | |
| 256 if (currentBuilder.moveNext()) { | |
| 257 return true; | |
| 258 } | |
| 259 baseMap = currentBuilder.inputValue; | |
| 260 if (baseMap == null) { | |
| 261 // No base map could be computed due to a circular dependency. Use an | |
| 262 // empty map so that no further results will be computed. | |
| 263 baseMap = {}; | |
| 264 } | |
| 265 keyIterator = baseMap.keys.iterator; | |
| 266 // Done with this builder. | |
| 267 currentBuilder = null; | |
| 268 } | |
| 269 // Prepare the next result value. | |
| 270 if (currentBuilder != null) { | |
| 271 if (currentBuilder.moveNext()) { | |
| 272 return true; | |
| 273 } | |
| 274 // Add the result value for the current Map key/value. | |
| 275 E resultValue = currentBuilder.inputValue; | |
| 276 if (resultValue != null) { | |
| 277 inputValue.add(resultValue); | |
| 278 } | |
| 279 // Done with this builder. | |
| 280 currentBuilder = null; | |
| 281 } | |
| 282 // Move to the next Map value. | |
| 283 if (valueIterator != null && valueIterator.moveNext()) { | |
| 284 K key = keyIterator.current; | |
| 285 V value = valueIterator.current; | |
| 286 currentBuilder = mapper(key, value).createBuilder(); | |
| 287 return moveNext(); | |
| 288 } | |
| 289 // Move to the next Map key. | |
| 290 if (keyIterator.moveNext()) { | |
| 291 K key = keyIterator.current; | |
| 292 valueIterator = baseMap[key].iterator; | |
| 293 return moveNext(); | |
| 294 } | |
| 295 // No more Map values/keys to transform. | |
| 296 return false; | |
| 297 } | |
| 298 } | |
| 299 | |
| 300 /** | |
| 301 * An input to an [AnalysisTask] that is computed by mapping the value of | |
| 302 * another task input to a list of values. | |
| 303 */ | |
| 304 class ObjectToListTaskInput<E> extends TaskInputImpl<List<E>> with ListTaskInput
Mixin<E> | |
| 305 implements ListTaskInput<E> { | |
| 306 /** | |
| 307 * The input used to compute the value to be mapped. | |
| 308 */ | |
| 309 final TaskInput baseInput; | |
| 310 | |
| 311 /** | |
| 312 * The function used to map the value of the base input to the list of values. | |
| 313 */ | |
| 314 final Mapper<Object, List<E>> mapper; | |
| 315 | |
| 316 /** | |
| 317 * Initialize a newly created task input that computes the input by accessing | |
| 318 * the given [result] associated with the given [target]. | |
| 319 */ | |
| 320 ObjectToListTaskInput(this.baseInput, this.mapper); | |
| 321 | |
| 322 @override | |
| 323 TaskInputBuilder<List<E>> createBuilder() => | |
| 324 new ObjectToListTaskInputBuilder<E>(this); | |
| 325 | |
| 326 @override | |
| 327 ListTaskInput /*<V>*/ toListOf(ResultDescriptor /*<V>*/ valueResult) { | |
| 328 return new ListToListTaskInput<E, dynamic /*V*/ >( | |
| 329 this, valueResult.of as dynamic); | |
| 330 } | |
| 331 | |
| 332 @override | |
| 333 MapTaskInput<AnalysisTarget, dynamic /*V*/ > toMapOf( | |
| 334 ResultDescriptor /*<V>*/ valueResult) { | |
| 335 return new ListToMapTaskInput<AnalysisTarget, dynamic /*V*/ >( | |
| 336 this as dynamic, valueResult.of); | |
| 337 } | |
| 338 } | |
| 339 | |
| 340 /** | |
| 341 * A [TaskInputBuilder] used to build an input based on a [SimpleTaskInput]. | |
| 342 */ | |
| 343 class ObjectToListTaskInputBuilder<E> implements TaskInputBuilder<List<E>> { | |
| 344 /** | |
| 345 * The input being built. | |
| 346 */ | |
| 347 final ObjectToListTaskInput<E> input; | |
| 348 | |
| 349 /** | |
| 350 * The builder created by the input. | |
| 351 */ | |
| 352 TaskInputBuilder builder; | |
| 353 | |
| 354 /** | |
| 355 * The value of the input being built, or `null` if the value hasn't been set | |
| 356 * yet or if no result is available ([currentValueNotAvailable] was called). | |
| 357 */ | |
| 358 List<E> _inputValue = null; | |
| 359 | |
| 360 /** | |
| 361 * Initialize a newly created task input builder that computes the result | |
| 362 * specified by the given [input]. | |
| 363 */ | |
| 364 ObjectToListTaskInputBuilder(this.input) { | |
| 365 builder = input.baseInput.createBuilder(); | |
| 366 } | |
| 367 | |
| 368 @override | |
| 369 ResultDescriptor get currentResult { | |
| 370 if (builder == null) { | |
| 371 return null; | |
| 372 } | |
| 373 return builder.currentResult; | |
| 374 } | |
| 375 | |
| 376 @override | |
| 377 AnalysisTarget get currentTarget { | |
| 378 if (builder == null) { | |
| 379 return null; | |
| 380 } | |
| 381 return builder.currentTarget; | |
| 382 } | |
| 383 | |
| 384 @override | |
| 385 void set currentValue(Object value) { | |
| 386 if (builder == null) { | |
| 387 throw new StateError( | |
| 388 'Cannot set the result value when there is no current result'); | |
| 389 } | |
| 390 builder.currentValue = value; | |
| 391 } | |
| 392 | |
| 393 @override | |
| 394 List<E> get inputValue { | |
| 395 if (builder != null) { | |
| 396 throw new StateError('Result value has not been created'); | |
| 397 } | |
| 398 return _inputValue; | |
| 399 } | |
| 400 | |
| 401 @override | |
| 402 void currentValueNotAvailable() { | |
| 403 if (builder == null) { | |
| 404 throw new StateError( | |
| 405 'Cannot set the result value when there is no current result'); | |
| 406 } | |
| 407 builder.currentValueNotAvailable(); | |
| 408 } | |
| 409 | |
| 410 @override | |
| 411 bool moveNext() { | |
| 412 if (builder == null) { | |
| 413 return false; | |
| 414 } else if (builder.moveNext()) { | |
| 415 return true; | |
| 416 } else { | |
| 417 // This might not be the right semantics. If the value could not be | |
| 418 // computed then we pass the resulting `null` in to the mapper function. | |
| 419 // Unfortunately, we cannot tell the difference between a `null` that's | |
| 420 // there because no value could be computed and a `null` that's there | |
| 421 // because that's what *was* computed. | |
| 422 _inputValue = input.mapper(builder.inputValue); | |
| 423 builder = null; | |
| 424 return false; | |
| 425 } | |
| 426 } | |
| 427 } | |
| 428 | |
| 429 /** | |
| 430 * An input to an [AnalysisTask] that is computed by accessing a single result | |
| 431 * defined on a single target. | |
| 432 */ | |
| 433 class SimpleTaskInput<V> extends TaskInputImpl<V> { | |
| 434 /** | |
| 435 * The target on which the result is defined. | |
| 436 */ | |
| 437 final AnalysisTarget target; | |
| 438 | |
| 439 /** | |
| 440 * The result to be accessed. | |
| 441 */ | |
| 442 final ResultDescriptor<V> result; | |
| 443 | |
| 444 /** | |
| 445 * Initialize a newly created task input that computes the input by accessing | |
| 446 * the given [result] associated with the given [target]. | |
| 447 */ | |
| 448 SimpleTaskInput(this.target, this.result); | |
| 449 | |
| 450 @override | |
| 451 TaskInputBuilder<V> createBuilder() => new SimpleTaskInputBuilder<V>(this); | |
| 452 } | |
| 453 | |
| 454 /** | |
| 455 * A [TaskInputBuilder] used to build an input based on a [SimpleTaskInput]. | |
| 456 */ | |
| 457 class SimpleTaskInputBuilder<V> implements TaskInputBuilder<V> { | |
| 458 /** | |
| 459 * The state value indicating that the builder is positioned before the single | |
| 460 * result. | |
| 461 */ | |
| 462 static const _BEFORE = -1; | |
| 463 | |
| 464 /** | |
| 465 * The state value indicating that the builder is positioned at the single | |
| 466 * result. | |
| 467 */ | |
| 468 static const _AT = 0; | |
| 469 | |
| 470 /** | |
| 471 * The state value indicating that the builder is positioned after the single | |
| 472 * result. | |
| 473 */ | |
| 474 static const _AFTER = 1; | |
| 475 | |
| 476 /** | |
| 477 * The input being built. | |
| 478 */ | |
| 479 final SimpleTaskInput<V> input; | |
| 480 | |
| 481 /** | |
| 482 * The value of the input being built. `null` if the value hasn't been set | |
| 483 * yet, or if no result is available ([currentValueNotAvailable] was called). | |
| 484 */ | |
| 485 V _resultValue = null; | |
| 486 | |
| 487 /** | |
| 488 * The state of the builder. | |
| 489 */ | |
| 490 int _state = _BEFORE; | |
| 491 | |
| 492 /** | |
| 493 * A flag indicating whether the result value was explicitly set. | |
| 494 */ | |
| 495 bool _resultSet = false; | |
| 496 | |
| 497 /** | |
| 498 * Initialize a newly created task input builder that computes the result | |
| 499 * specified by the given [input]. | |
| 500 */ | |
| 501 SimpleTaskInputBuilder(this.input); | |
| 502 | |
| 503 @override | |
| 504 ResultDescriptor get currentResult => _state == _AT ? input.result : null; | |
| 505 | |
| 506 @override | |
| 507 AnalysisTarget get currentTarget => _state == _AT ? input.target : null; | |
| 508 | |
| 509 @override | |
| 510 void set currentValue(Object value) { | |
| 511 if (_state != _AT) { | |
| 512 throw new StateError( | |
| 513 'Cannot set the result value when there is no current result'); | |
| 514 } | |
| 515 _resultValue = value as V; | |
| 516 _resultSet = true; | |
| 517 } | |
| 518 | |
| 519 @override | |
| 520 V get inputValue { | |
| 521 if (_state != _AFTER) { | |
| 522 throw new StateError('Result value has not been created'); | |
| 523 } | |
| 524 return _resultValue; | |
| 525 } | |
| 526 | |
| 527 @override | |
| 528 void currentValueNotAvailable() { | |
| 529 if (_state != _AT) { | |
| 530 throw new StateError( | |
| 531 'Cannot set the result value when there is no current result'); | |
| 532 } | |
| 533 _resultValue = null; | |
| 534 _resultSet = true; | |
| 535 } | |
| 536 | |
| 537 @override | |
| 538 bool moveNext() { | |
| 539 if (_state == _BEFORE) { | |
| 540 _state = _AT; | |
| 541 return true; | |
| 542 } else { | |
| 543 if (!_resultSet) { | |
| 544 throw new StateError( | |
| 545 'The value of the current result must be set before moving to the ne
xt result.'); | |
| 546 } | |
| 547 _state = _AFTER; | |
| 548 return false; | |
| 549 } | |
| 550 } | |
| 551 } | |
| 552 | |
| 553 abstract class TaskInputImpl<V> implements TaskInput<V> { | |
| 554 @override | |
| 555 ListTaskInput /*<E>*/ mappedToList(List /*<E>*/ mapper(V value)) { | |
| 556 return new ObjectToListTaskInput(this, mapper); | |
| 557 } | |
| 558 } | |
| 559 | |
| 560 /** | |
| 561 * A [TaskInputBuilder] used to build an input based on one or more other task | |
| 562 * inputs. The task inputs to be built are specified by a table mapping the name | |
| 563 * of the input to the task used to access the input's value. | |
| 564 */ | |
| 565 class TopLevelTaskInputBuilder | |
| 566 implements TaskInputBuilder<Map<String, Object>> { | |
| 567 /** | |
| 568 * The descriptors describing the inputs to be built. | |
| 569 */ | |
| 570 final Map<String, TaskInput> inputDescriptors; | |
| 571 | |
| 572 /** | |
| 573 * The names of the inputs. There are the keys from the [inputDescriptors] in | |
| 574 * an indexable form. | |
| 575 */ | |
| 576 List<String> inputNames; | |
| 577 | |
| 578 /** | |
| 579 * The index of the input name associated with the current result and target. | |
| 580 */ | |
| 581 int nameIndex = -1; | |
| 582 | |
| 583 /** | |
| 584 * The builder used to build the current result. | |
| 585 */ | |
| 586 TaskInputBuilder currentBuilder; | |
| 587 | |
| 588 /** | |
| 589 * The inputs that are being or have been built. The map will be incomplete | |
| 590 * unless the method [moveNext] returns `false`. | |
| 591 */ | |
| 592 final Map<String, Object> inputs = new HashMap<String, Object>(); | |
| 593 | |
| 594 /** | |
| 595 * Initialize a newly created task input builder to build the inputs described | |
| 596 * by the given [inputDescriptors]. | |
| 597 */ | |
| 598 TopLevelTaskInputBuilder(this.inputDescriptors) { | |
| 599 inputNames = inputDescriptors.keys.toList(); | |
| 600 } | |
| 601 | |
| 602 @override | |
| 603 ResultDescriptor get currentResult { | |
| 604 if (currentBuilder == null) { | |
| 605 return null; | |
| 606 } | |
| 607 return currentBuilder.currentResult; | |
| 608 } | |
| 609 | |
| 610 @override | |
| 611 AnalysisTarget get currentTarget { | |
| 612 if (currentBuilder == null) { | |
| 613 return null; | |
| 614 } | |
| 615 return currentBuilder.currentTarget; | |
| 616 } | |
| 617 | |
| 618 @override | |
| 619 void set currentValue(Object value) { | |
| 620 if (currentBuilder == null) { | |
| 621 throw new StateError( | |
| 622 'Cannot set the result value when there is no current result'); | |
| 623 } | |
| 624 currentBuilder.currentValue = value; | |
| 625 } | |
| 626 | |
| 627 @override | |
| 628 Map<String, Object> get inputValue { | |
| 629 if (nameIndex < inputNames.length) { | |
| 630 throw new StateError('Result value has not been created'); | |
| 631 } | |
| 632 return inputs; | |
| 633 } | |
| 634 | |
| 635 /** | |
| 636 * Assuming that there is a current input, return its name. | |
| 637 */ | |
| 638 String get _currentName => inputNames[nameIndex]; | |
| 639 | |
| 640 @override | |
| 641 void currentValueNotAvailable() { | |
| 642 if (currentBuilder == null) { | |
| 643 throw new StateError( | |
| 644 'Cannot set the result value when there is no current result'); | |
| 645 } | |
| 646 currentBuilder.currentValueNotAvailable(); | |
| 647 } | |
| 648 | |
| 649 @override | |
| 650 bool moveNext() { | |
| 651 if (nameIndex >= inputNames.length) { | |
| 652 // We have already computed all of the results, so just return false. | |
| 653 return false; | |
| 654 } | |
| 655 if (nameIndex < 0) { | |
| 656 // This is the first time moveNext has been invoked, so we just determine | |
| 657 // whether there are any results to be computed. | |
| 658 nameIndex = 0; | |
| 659 } else { | |
| 660 if (currentBuilder.moveNext()) { | |
| 661 // We are still working on building the value associated with the | |
| 662 // current name. | |
| 663 return true; | |
| 664 } | |
| 665 if (currentBuilder.inputValue != null) { | |
| 666 inputs[_currentName] = currentBuilder.inputValue; | |
| 667 } | |
| 668 nameIndex++; | |
| 669 } | |
| 670 if (nameIndex >= inputNames.length) { | |
| 671 // There is no next value, so we're done. | |
| 672 return false; | |
| 673 } | |
| 674 currentBuilder = inputDescriptors[_currentName].createBuilder(); | |
| 675 // NOTE: This assumes that every builder will require at least one result | |
| 676 // value to be created. If that assumption is every broken, this method will | |
| 677 // need to be changed to advance until we find a builder that does require | |
| 678 // a result to be computed (or run out of builders). | |
| 679 return currentBuilder.moveNext(); | |
| 680 } | |
| 681 } | |
| 682 | |
| 683 /** | |
| 684 * An input to an [AnalysisTask] that is computed by the following steps. First | |
| 685 * another (base) task input is used to compute a [List]-valued result. An input | |
| 686 * generator function is then used to map each element of that list to a task | |
| 687 * input. Finally, each of the task inputs are used to access analysis results, | |
| 688 * and a collection of the analysis results is used as the input to the task. | |
| 689 */ | |
| 690 abstract class _ListToCollectionTaskInput<B, E, C> extends TaskInputImpl<C> { | |
| 691 /** | |
| 692 * The accessor used to access the list of elements being mapped. | |
| 693 */ | |
| 694 final TaskInput<List<B>> baseAccessor; | |
| 695 | |
| 696 /** | |
| 697 * The function used to convert an element in the list returned by the | |
| 698 * [baseAccessor] to a task input. | |
| 699 */ | |
| 700 final GenerateTaskInputs<B, E> generateTaskInputs; | |
| 701 | |
| 702 /** | |
| 703 * Initialize a result accessor to use the given [baseAccessor] to access a | |
| 704 * list of values that can be passed to the given [generateTaskInputs] to | |
| 705 * generate a list of task inputs that can be used to access the elements of | |
| 706 * the input being accessed. | |
| 707 */ | |
| 708 _ListToCollectionTaskInput(this.baseAccessor, this.generateTaskInputs); | |
| 709 } | |
| 710 | |
| 711 /** | |
| 712 * A [TaskInputBuilder] used to build an [_ListToCollectionTaskInput]. | |
| 713 */ | |
| 714 abstract class _ListToCollectionTaskInputBuilder<B, E, C> | |
| 715 implements TaskInputBuilder<C> { | |
| 716 /** | |
| 717 * The input being built. | |
| 718 */ | |
| 719 final _ListToCollectionTaskInput<B, E, C> input; | |
| 720 | |
| 721 /** | |
| 722 * The builder used to build the current result. | |
| 723 */ | |
| 724 TaskInputBuilder currentBuilder; | |
| 725 | |
| 726 /** | |
| 727 * The list of values computed by the [input]'s base accessor. | |
| 728 */ | |
| 729 List<B> _baseList = null; | |
| 730 | |
| 731 /** | |
| 732 * The index in the [_baseList] of the value for which a value is currently | |
| 733 * being built. | |
| 734 */ | |
| 735 int _baseListIndex = -1; | |
| 736 | |
| 737 /** | |
| 738 * The element of the [_baseList] for which a value is currently being built. | |
| 739 */ | |
| 740 B _baseListElement; | |
| 741 | |
| 742 /** | |
| 743 * Initialize a newly created task input builder that computes the result | |
| 744 * specified by the given [input]. | |
| 745 */ | |
| 746 _ListToCollectionTaskInputBuilder(this.input); | |
| 747 | |
| 748 @override | |
| 749 ResultDescriptor get currentResult { | |
| 750 if (currentBuilder == null) { | |
| 751 return null; | |
| 752 } | |
| 753 return currentBuilder.currentResult; | |
| 754 } | |
| 755 | |
| 756 @override | |
| 757 AnalysisTarget get currentTarget { | |
| 758 if (currentBuilder == null) { | |
| 759 return null; | |
| 760 } | |
| 761 return currentBuilder.currentTarget; | |
| 762 } | |
| 763 | |
| 764 @override | |
| 765 void set currentValue(Object value) { | |
| 766 if (currentBuilder == null) { | |
| 767 throw new StateError( | |
| 768 'Cannot set the result value when there is no current result'); | |
| 769 } | |
| 770 currentBuilder.currentValue = value; | |
| 771 } | |
| 772 | |
| 773 @override | |
| 774 C get inputValue { | |
| 775 if (currentBuilder != null || _resultValue == null) { | |
| 776 throw new StateError('Result value has not been created'); | |
| 777 } | |
| 778 return _resultValue; | |
| 779 } | |
| 780 | |
| 781 /** | |
| 782 * The list of values being built. | |
| 783 */ | |
| 784 C get _resultValue; | |
| 785 | |
| 786 @override | |
| 787 void currentValueNotAvailable() { | |
| 788 if (currentBuilder == null) { | |
| 789 throw new StateError( | |
| 790 'Cannot set the result value when there is no current result'); | |
| 791 } | |
| 792 currentBuilder.currentValueNotAvailable(); | |
| 793 } | |
| 794 | |
| 795 @override | |
| 796 bool moveNext() { | |
| 797 if (currentBuilder == null) { | |
| 798 if (_resultValue == null) { | |
| 799 // This is the first time moveNext has been invoked, so start by | |
| 800 // computing the list of values from which the results will be derived. | |
| 801 currentBuilder = input.baseAccessor.createBuilder(); | |
| 802 return currentBuilder.moveNext(); | |
| 803 } else { | |
| 804 // We have already computed all of the results, so just return false. | |
| 805 return false; | |
| 806 } | |
| 807 } | |
| 808 if (currentBuilder.moveNext()) { | |
| 809 return true; | |
| 810 } | |
| 811 if (_resultValue == null) { | |
| 812 // We have finished computing the list of values from which the results | |
| 813 // will be derived. | |
| 814 _baseList = currentBuilder.inputValue; | |
| 815 if (_baseList == null) { | |
| 816 // No base list could be computed due to a circular dependency. Use an | |
| 817 // empty list so that no further results will be computed. | |
| 818 _baseList = []; | |
| 819 } | |
| 820 _baseListIndex = 0; | |
| 821 _initResultValue(); | |
| 822 } else { | |
| 823 // We have finished computing one of the elements in the result list. | |
| 824 if (currentBuilder.inputValue != null) { | |
| 825 _addResultElement(_baseListElement, currentBuilder.inputValue); | |
| 826 } | |
| 827 _baseListIndex++; | |
| 828 } | |
| 829 if (_baseListIndex >= _baseList.length) { | |
| 830 currentBuilder = null; | |
| 831 return false; | |
| 832 } | |
| 833 _baseListElement = _baseList[_baseListIndex]; | |
| 834 currentBuilder = input.generateTaskInputs(_baseListElement).createBuilder(); | |
| 835 return currentBuilder.moveNext(); | |
| 836 } | |
| 837 | |
| 838 void _addResultElement(B baseElement, E resultElement); | |
| 839 void _initResultValue(); | |
| 840 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1400473008:
Roll Observatory packages and add a roll script (Closed)
Base URL: git@github.com:dart-lang/observatory_pub_packages.git@master