Move index closer to the plugin API

pkg/analysis_server/lib/src/services/index/local_index.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.src.index.local_index;
 
 import 'dart:async';
 
+import 'package:analysis_server/analysis/index/index_core.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/index_contributor.dart'
-    as contributors;
+    as oldContributors;
 import 'package:analysis_server/src/services/index/store/split_store.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/html.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 /**
  * A local implementation of [Index].
  */
 class LocalIndex extends Index {
+  /**
+   * The index contributors used by this index.
+   */
+  List<IndexContributor> contributors;
+
   SplitIndexStore _store;
 
   LocalIndex(NodeManager nodeManager) {
     _store = new SplitIndexStore(nodeManager);
   }
 
   @override
   String get statistics => _store.statistics;
 
   @override
@@ skipping 12 matching lines @@
   /**
    * Returns a `Future<List<Location>>` that completes with the list of
    * [LocationImpl]s of 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 locations will be all of the
    * places where the function is invoked.
    */
   @override
   Future<List<LocationImpl>> getRelationships(
-      Element element, RelationshipImpl relationship) {
-    return _store.getRelationships(element, relationship);
+      IndexableObject indexable, RelationshipImpl relationship) {
+    return _store.getRelationships(indexable, relationship);
   }
 
   @override
   List<Element> getTopLevelDeclarations(ElementNameFilter nameFilter) {
     return _store.getTopLevelDeclarations(nameFilter);
   }
 
   @override
   void indexHtmlUnit(AnalysisContext context, HtmlUnit unit) {
-    contributors.indexHtmlUnit(_store, context, unit);
+    oldContributors.indexHtmlUnit(_store, context, unit);
   }
 
   @override
   void indexUnit(AnalysisContext context, CompilationUnit unit) {
-    contributors.indexDartUnit(_store, context, unit);
+    oldContributors.indexDartUnit(_store, context, unit);
   }
 
   @override
+  void recordRelationship(
+      IndexableObject indexable, Relationship relationship, Location location) {
+    _store.recordRelationship(indexable, relationship, location);
+  }
+
+  @override
   void removeContext(AnalysisContext context) {
     _store.removeContext(context);
   }
 
   @override
   void removeSource(AnalysisContext context, Source source) {
     _store.removeSource(context, source);
   }
 
   @override
   void removeSources(AnalysisContext context, SourceContainer container) {
     _store.removeSources(context, container);
   }
 
   @override
   void run() {
     // NO-OP for the local index
   }
 
   @override
   void stop() {
     // NO-OP for the local index
   }
 }