Cache flushing implementation for the task model.

pkg/analyzer/lib/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.task.dart;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/utilities_general.dart';
+import 'package:analyzer/src/task/dart.dart';
 import 'package:analyzer/task/model.dart';
 
 /**
  * The analysis errors associated with a target.
  *
  * The value combines errors represented by multiple other results.
  */
 // TODO(brianwilkerson) If we want to associate errors with targets smaller than
 // a file, we will need other contribution points to collect them. In which case
 // we might want to rename this and/or document that it applies to files.
@@ skipping 72 matching lines @@
     new ResultDescriptor<LibraryElement>('LIBRARY_ELEMENT', null);
 
 /**
  * The compilation unit AST produced while parsing a compilation unit.
  *
  * The AST structure will not have resolution information associated with it.
  *
  * The result is only available for targets representing a Dart compilation unit.
  */
 final ResultDescriptor<CompilationUnit> PARSED_UNIT =
-    new ResultDescriptor<CompilationUnit>('PARSED_UNIT', null);
+    new ResultDescriptor<CompilationUnit>('PARSED_UNIT', null,
+        cachingPolicy: AST_CACHING_POLICY);
 
 /**
  * The resolved [CompilationUnit] associated with a unit.
  *
  * The result is only available for targets representing a unit.
  */
 final ResultDescriptor<CompilationUnit> RESOLVED_UNIT =
-    new ResultDescriptor<CompilationUnit>('RESOLVED_UNIT', null);
+    new ResultDescriptor<CompilationUnit>('RESOLVED_UNIT', null,
+        cachingPolicy: AST_CACHING_POLICY);
 
 /**
  * The token stream produced while scanning a compilation unit.
  *
  * The value is the first token in the file, or the special end-of-file marker
  * at the end of the stream if the file does not contain any tokens.
  *
  * The result is only available for targets representing a Dart compilation unit.
  */
-final ResultDescriptor<Token> TOKEN_STREAM =
-    new ResultDescriptor<Token>('TOKEN_STREAM', null);
+final ResultDescriptor<Token> TOKEN_STREAM = new ResultDescriptor<Token>(
+    'TOKEN_STREAM', null, cachingPolicy: TOKEN_STREAM_CACHING_POLICY);
 
 /**
  * The sources of the Dart files that a library consists of.
  *
  * The list will include the source of the defining unit and [INCLUDED_PARTS].
  * So, it is never empty or `null`.
  *
  * The result is only available for targets representing a Dart library.
  */
 final ListResultDescriptor<Source> UNITS =
@@ skipping 35 matching lines @@
   @override
   bool operator ==(other) {
     return other is LibrarySpecificUnit &&
         other.library == library &&
         other.unit == unit;
   }
 
   @override
   String toString() => '$unit in $library';
 }