Make IndexableObjectKind parameterized.

pkg/analysis_server/lib/src/services/index/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.index;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/index/index_core.dart';
 import 'package:analysis_server/src/services/index/indexable_element.dart';
@@ skipping 63 matching lines @@
 
   /**
    * Initialize a newly created indexable name to represent the given [name].
    */
   IndexableName(this.name);
 
   @override
   String get filePath => null;
 
   @override
-  IndexableObjectKind get kind => IndexableNameKind.INSTANCE;
+  IndexableNameKind get kind => IndexableNameKind.INSTANCE;
 
   @override
   int get offset {
     return -1;
   }
 
   @override
   bool operator ==(Object object) =>
       object is IndexableName && object.name == name;
 
   @override
   String toString() => name;
 }
 
 /**
  * The kind of an indexable name.
  */
-class IndexableNameKind implements IndexableObjectKind {
+class IndexableNameKind implements IndexableObjectKind<IndexableName> {
   /**
    * The unique instance of this class.
    */
   static final IndexableNameKind INSTANCE =
       new IndexableNameKind._(IndexableObjectKind.nextIndex);
 
   /**
    * The index uniquely identifying this kind.
    */
   final int index;
 
   /**
    * Initialize a newly created kind to have the given [index].
    */
   IndexableNameKind._(this.index) {
     IndexableObjectKind.register(this);
   }
 
   @override
-  IndexableObject decode(AnalysisContext context, String filePath, int offset) {
+  IndexableName decode(AnalysisContext context, String filePath, int offset) {
     throw new UnsupportedError(
         'Indexable names cannot be decoded through their kind');
   }
 
   @override
-  int encodeHash(StringToInt stringToInt, IndexableObject indexable) {
-    String name = (indexable as IndexableName).name;
+  int encodeHash(StringToInt stringToInt, IndexableName indexable) {
+    String name = indexable.name;
     return stringToInt(name);
   }
 }
 
 /**
  * Constants used when populating and accessing the index.
  */
 class IndexConstants {
   /**
    * Left: the Universe or a Library.
@@ skipping 222 matching lines @@
    */
   static RelationshipImpl getRelationship(String identifier) {
     RelationshipImpl relationship = _RELATIONSHIP_MAP[identifier];
     if (relationship == null) {
       relationship = new RelationshipImpl(identifier);
       _RELATIONSHIP_MAP[identifier] = relationship;
     }
     return relationship;
   }
 }