Use MODIFICATION_TIME in ScanDartTask and ParseHtmlTask.

pkg/analyzer/lib/src/task/dart.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.src.task.dart;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 5075 matching lines @@
  * A task that scans the content of a Dart file, producing a stream of Dart
  * tokens, line information, and any lexical errors encountered in the process.
  */
 class ScanDartTask extends SourceBasedAnalysisTask {
   /**
    * The name of the input whose value is the content of the file.
    */
   static const String CONTENT_INPUT_NAME = 'CONTENT_INPUT_NAME';
 
   /**
+   * The name of the input whose value is the modification time of the file.
+   */
+  static const String MODIFICATION_TIME_INPUT = 'MODIFICATION_TIME_INPUT';
+
+  /**
    * The task descriptor describing this kind of task.
    */
   static final TaskDescriptor DESCRIPTOR = new TaskDescriptor(
       'ScanDartTask',
       createTask,
       buildInputs,
       <ResultDescriptor>[LINE_INFO, SCAN_ERRORS, TOKEN_STREAM],
       suitabilityFor: suitabilityFor);
 
   /**
    * Initialize a newly created task to access the content of the source
    * associated with the given [target] in the given [context].
    */
   ScanDartTask(InternalAnalysisContext context, AnalysisTarget target)
       : super(context, target);
 
   @override
   TaskDescriptor get descriptor => DESCRIPTOR;
 
   @override
   void internalPerform() {
     Source source = getRequiredSource();
+    RecordingErrorListener errorListener = new RecordingErrorListener();
 
-    RecordingErrorListener errorListener = new RecordingErrorListener();
-    if (context.getModificationStamp(target.source) < 0) {
+    int modificationTime = getRequiredInput(MODIFICATION_TIME_INPUT);
+    if (modificationTime < 0) {
       String message = 'Content could not be read';
       if (context is InternalAnalysisContext) {
         CacheEntry entry =
             (context as InternalAnalysisContext).getCacheEntry(target);
         CaughtException exception = entry.exception;
         if (exception != null) {
           message = exception.toString();
         }
       }
       if (source.exists()) {
@@ skipping 36 matching lines @@
       outputs[SCAN_ERRORS] = getUniqueErrors(errorListener.errors);
     } else {
       throw new AnalysisException(
           'Cannot scan Dart code from a ${target.runtimeType}');
     }
   }
 
   /**
    * Return a map from the names of the inputs of this kind of task to the task
    * input descriptors describing those inputs for a task with the given
-   * [source].
+   * [target].
    */
   static Map<String, TaskInput> buildInputs(AnalysisTarget target) {
     if (target is Source) {
-      return <String, TaskInput>{CONTENT_INPUT_NAME: CONTENT.of(target)};
+      return <String, TaskInput>{
+        CONTENT_INPUT_NAME: CONTENT.of(target),
+        MODIFICATION_TIME_INPUT: MODIFICATION_TIME.of(target)
+      };
     } else if (target is DartScript) {
       // This task does not use the following input; it is included only to add
       // a dependency between this value and the containing source so that when
       // the containing source is modified these results will be invalidated.
-      return <String, TaskInput>{'-': DART_SCRIPTS.of(target.source)};
+      Source source = target.source;
+      return <String, TaskInput>{
+        '-': DART_SCRIPTS.of(source),
+        MODIFICATION_TIME_INPUT: MODIFICATION_TIME.of(source)
+      };
     }
     throw new AnalysisException(
         'Cannot build inputs for a ${target.runtimeType}');
   }
 
   /**
    * Create a [ScanDartTask] based on the given [target] in the given [context].
    */
   static ScanDartTask createTask(
       AnalysisContext context, AnalysisTarget target) {
@@ skipping 324 matching lines @@
 
   @override
   bool moveNext() {
     if (_newSources.isEmpty) {
       return false;
     }
     currentTarget = _newSources.removeLast();
     return true;
   }
 }