Move index closer to the plugin API

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

Index: pkg/analysis_server/lib/src/services/index/index_store.dart
diff --git a/pkg/analysis_server/lib/src/services/index/index_store.dart b/pkg/analysis_server/lib/src/services/index/index_store.dart
index 8dd931a1bd6a69439702ddf29a22e5c3111253a9..1d61e7a4f0618420ff2ceefe121ddbcda329e7a2 100644
--- a/pkg/analysis_server/lib/src/services/index/index_store.dart
+++ b/pkg/analysis_server/lib/src/services/index/index_store.dart
@@ -4,18 +4,16 @@
 
 library services.index_store;
 
-import 'dart:async';
-
+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';
-import 'package:analyzer/src/generated/source.dart';
 
 /**
  * A container with information computed by an index - relations between
  * elements.
  */
-abstract class InternalIndexStore {
+abstract class InternalIndexStore extends IndexStore {
   /**
    * Answers index statistics.
    */
@@ -53,11 +51,6 @@ abstract class InternalIndexStore {
   bool aboutToIndexHtml(AnalysisContext context, HtmlElement htmlElement);
 
   /**
-   * Removes all of the information.
-   */
-  void clear();
-
-  /**
    * Notifies that index store that the current Dart or HTML unit indexing is
    * done.
    *
@@ -67,91 +60,12 @@ abstract class InternalIndexStore {
   void doneIndex();
 
   /**
-   * Returns a [Future] that completes with locations of the elements that have
-   * the given [relationship] with the given [element].
-   *
-   * For example, if the [element] represents a function and the relationship is
-   * the `is-invoked-by` relationship, then the returned locations will be all
-   * of the places where the function is invoked.
-   *
-   * [element] - the the [Element] that has the relationship with the locations
-   *    to be returned.
-   * [relationship] - the [RelationshipImpl] between the given element and the
-   *    locations to be returned
-   */
-  Future<List<LocationImpl>> getRelationships(
-      Element element, RelationshipImpl relationship);
-
-  /**
    * Returns top-level [Element]s whose names satisfy to [nameFilter].
    */
   List<Element> getTopLevelDeclarations(ElementNameFilter nameFilter);
 
   /**
-   * Records that the given [element] and [location] have the given
-   * [relationship].
-   *
-   * For example, if the [relationship] is the `is-invoked-by` relationship,
-   * then [element] would be the function being invoked and [location] would be
-   * the point at which it is referenced. Each element can have the same
-   * relationship with multiple locations. In other words, if the following code
-   * were executed
-   *
-   *     recordRelationship(element, isReferencedBy, location1);
-   *     recordRelationship(element, isReferencedBy, location2);
-   *
-   * then both relationships would be maintained in the index and the result of executing
-   *
-   *     getRelationship(element, isReferencedBy);
-   *
-   * would be a list containing both `location1` and `location2`.
-   *
-   * [element] - the [Element] that is related to the location.
-   * [relationship] - the [RelationshipImpl] between the element and the location.
-   * [location] the [LocationImpl] where relationship happens.
-   */
-  void recordRelationship(
-      Element element, RelationshipImpl relationship, LocationImpl location);
-
-  /**
    * Records the declaration of the given top-level [element].
    */
   void recordTopLevelDeclaration(Element element);
-
-  /**
-   * Removes from the index all of the information associated with [context].
-   *
-   * This method should be invoked when [context] is disposed.
-   *
-   * [context] - the [AnalysisContext] being removed.
-   */
-  void removeContext(AnalysisContext context);
-
-  /**
-   * Removes from the index all of the information associated with elements or
-   * locations in [source]. This includes relationships between an element in
-   * [source] and any other locations, relationships between any other elements
-   * and locations within [source].
-   *
-   * This method should be invoked when [source] is no longer part of the code
-   * base.
-   *
-   * [context] - the [AnalysisContext] in which [source] being removed.
-   * [source] - the [Source] being removed
-   */
-  void removeSource(AnalysisContext context, Source source);
-
-  /**
-   * Removes from the index all of the information associated with elements or
-   * locations in the given sources. This includes relationships between an
-   * element in the given sources and any other locations, relationships between
-   * any other elements and a location within the given sources.
-   *
-   * This method should be invoked when multiple sources are no longer part of
-   * the code base.
-   *
-   * [context] - the [AnalysisContext] in which [Source]s being removed.
-   * [container] - the [SourceContainer] holding the sources being removed.
-   */
-  void removeSources(AnalysisContext context, SourceContainer container);
 }