Use IndexContributor(s) in LocalIndex.

pkg/analysis_server/lib/analysis/index/index_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 analysis_server.analysis.index.index_dart;
-
-import 'package:analysis_server/analysis/index/index_core.dart';
-import 'package:analyzer/src/generated/ast.dart';
-import 'package:analyzer/src/generated/engine.dart';
-import 'package:analyzer/src/generated/source.dart';
-
-/**
- * An [IndexContributor] that can be used to contribute relationships for Dart
- * files.
- *
- * Clients are expected to subtype this class when implementing plugins.
- */
-abstract class DartIndexContributor extends IndexContributor {
-  @override
-  void contributeTo(IndexStore store, AnalysisContext context, Source source) {
-    if (!AnalysisEngine.isDartFileName(source.fullName)) {
-      return;
-    }
-    List<Source> libraries = context.getLibrariesContaining(source);
-    if (libraries.isEmpty) {
-      return;
-    }
-    libraries.forEach((Source library) {
-      CompilationUnit unit = context.resolveCompilationUnit2(source, library);
-      if (unit != null) {
-        internalContributeTo(store, unit);
-      }
-    });
-  }
-
-  /**
-   * Contribute relationships to the given index [store] based on the given
-   * fully resolved compilation[unit].
-   */
-  void internalContributeTo(IndexStore store, CompilationUnit unit);
-}