Move Index and IndexStore implementations into Engine.

pkg/analyzer/lib/src/index/index_contributor.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.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
-library engine.src.index;
+library engine.src.index_contributor;
 
 import 'dart:collection' show Queue;
 
 import 'package:analyzer/index/index.dart';
 import 'package:analyzer/index/index_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' as ht;
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/resolver.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 
 /**
  * Adds data to [store] based on the resolved Dart [unit].
  */
 void indexDartUnit(IndexStore store, AnalysisContext context,
     CompilationUnit unit) {
+  // check unit
+  if (unit == null) {
+    return;
+  }
+  // prepare unit element
   CompilationUnitElement unitElement = unit.element;
+  if (unitElement == null) {
+    return;
+  }
+  // about to index
   bool mayIndex = store.aboutToIndexDart(context, unitElement);
   if (!mayIndex) {
     return;
   }
+  // do index
   unit.accept(new _IndexContributor(store));
   unit.accept(new _AngularDartIndexContributor(store));
   store.doneIndex();
 }
 
 
 /**
  * Adds data to [store] based on the resolved HTML [unit].
  */
 void indexHtmlUnit(IndexStore store, AnalysisContext context, ht.HtmlUnit unit)
     {
+  // check unit
+  if (unit == null) {
+    return;
+  }
+  // prepare unit element
   HtmlElement unitElement = unit.element;
+  if (unitElement == null) {
+    return;
+  }
+  // about to index
   bool mayIndex = store.aboutToIndexHtml(context, unitElement);
   if (!mayIndex) {
     return;
   }
+  // do index
   unit.accept(new _AngularHtmlIndexContributor(store));
   store.doneIndex();
 }
 
 
 /**
  * Visits resolved [CompilationUnit] and adds Angular specific relationships
  * into [IndexStore].
  */
 class _AngularDartIndexContributor extends GeneralizingAstVisitor<Object> {
@@ skipping 1123 matching lines @@
   }
 
   /**
    * @return `true` if given "node" is part of [PrefixedIdentifier] "prefix.node".
    */
   static bool _isIdentifierInPrefixedIdentifier(SimpleIdentifier node) {
     AstNode parent = node.parent;
     return parent is PrefixedIdentifier && identical(parent.identifier, node);
   }
 }