Extract Dart specific node management into DartUnitIndexObjectManager.

pkg/analysis_server/lib/src/services/index/index_store.dart

 // Copyright (c) 2014, 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 services.index_store;
 
 import 'package:analysis_server/analysis/index/index_core.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 
 /**
  * A container with information computed by an index - relations between
  * elements.
  */
 abstract class InternalIndexStore extends IndexStore {
   /**
    * Answers index statistics.
    */
   String get statistics;
 
   /**
-   * Notifies the index store that we are going to index an unit with the given
-   * [unitElement].
-   *
-   * If the unit is a part of a library, then all its locations are removed.
-   *
-   * If it is a defining compilation unit of a library, then index store also
-   * checks if some previously indexed parts of the library are not parts of the
-   * library anymore, and clears their information.
+   * Notifies the index store that we are going to index the given [object].
    *
    * [context] - the [AnalysisContext] in which unit being indexed.
-   * [unitElement] - the element of the unit being indexed.
+   * [object] - the object being indexed.
    *
-   * Returns `true` if the given [unitElement] may be indexed, or `false` if
+   * Returns `true` if the given [object] may be indexed, or `false` if
    * belongs to a disposed [AnalysisContext], is not resolved completely, etc.
    */
-  bool aboutToIndexDart(
-      AnalysisContext context, CompilationUnitElement unitElement);
+  bool aboutToIndex(AnalysisContext context, Object object);
 
   /**
-   * Notifies the index store that we are going to index an unit with the given
-   * [htmlElement].
-   *
-   * [context] - the [AnalysisContext] in which unit being indexed.
-   * [htmlElement] - the [HtmlElement] being indexed.
-   *
-   * Returns `true` if the given [htmlElement] may be indexed, or `false` if
-   * belongs to a disposed [AnalysisContext], is not resolved completely, etc.
+   * Notifies the index store that there was an error during the current
+   * indexing, and all the information recorded after the last
+   * [aboutToIndex] invocation must be discarded.
    */
-  bool aboutToIndexHtml(AnalysisContext context, HtmlElement htmlElement);
+  void cancelIndex();
 
   /**
-   * Notifies the index store that there was an error during the current Dart
-   * indexing, and all the information recorded after the last
-   * [aboutToIndexDart] invocation must be discarded.
-   */
-  void cancelIndexDart();
-
-  /**
-   * Notifies the index store that the current Dart or HTML unit indexing is
-   * done.
+   * Notifies the index store that the current object indexing is done.
    *
-   * If this method is not invoked after corresponding "aboutToIndex*"
+   * If this method is not invoked after corresponding [aboutToIndex]
    * invocation, all recorded information may be lost.
    */
   void doneIndex();
 
   /**
    * Returns top-level [Element]s whose names satisfy to [nameFilter].
    */
   List<Element> getTopLevelDeclarations(ElementNameFilter nameFilter);
 
   /**
    * Records the declaration of the given top-level [element].
    */
   void recordTopLevelDeclaration(Element element);
 }