Convert subclasses of Enum

pkg/analyzer/lib/src/dart/element/element.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 analyzer.src.dart.element.element;
 
 import 'dart:collection';
 import 'dart:math' show min;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
 import 'package:analyzer/src/dart/constant/value.dart';
 import 'package:analyzer/src/dart/element/handle.dart';
 import 'package:analyzer/src/dart/element/type.dart';
 import 'package:analyzer/src/error/codes.dart' show CompileTimeErrorCode;
 import 'package:analyzer/src/generated/constant.dart' show EvaluationResultImpl;
 import 'package:analyzer/src/generated/engine.dart'
     show AnalysisContext, AnalysisEngine;
-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/sdk.dart' show DartSdk;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/testing/ast_factory.dart';
 import 'package:analyzer/src/generated/utilities_collection.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
 import 'package:analyzer/src/generated/utilities_general.dart';
 import 'package:analyzer/src/summary/idl.dart';
 import 'package:analyzer/src/task/dart.dart';
@@ skipping 3032 matching lines @@
     if (node == null) {
       return null;
     }
     return node.getAncestor(predicate);
   }
 
   /**
    * Return `true` if this element has the given [modifier] associated with it.
    */
   bool hasModifier(Modifier modifier) =>
-      BooleanArray.getEnum(_modifiers, modifier);
+      BooleanArray.get(_modifiers, modifier.ordinal);
 
   @override
   bool isAccessibleIn(LibraryElement library) {
     if (Identifier.isPrivateName(name)) {
       return library == this.library;
     }
     return true;
   }
 
   /**
@@ skipping 14 matching lines @@
     assert(!isResynthesized);
     _codeOffset = offset;
     _codeLength = length;
   }
 
   /**
    * Set whether the given [modifier] is associated with this element to
    * correspond to the given [value].
    */
   void setModifier(Modifier modifier, bool value) {
-    _modifiers = BooleanArray.setEnum(_modifiers, modifier, value);
+    _modifiers = BooleanArray.set(_modifiers, modifier.ordinal, value);
   }
 
   @override
   String toString() {
     StringBuffer buffer = new StringBuffer();
     appendTo(buffer);
     return buffer.toString();
   }
 
   @override
@@ skipping 3049 matching lines @@
     buffer.write(displayName);
     super.appendTo(buffer);
   }
 
   @override
   MethodDeclaration computeNode() =>
       getNodeMatching((node) => node is MethodDeclaration);
 }
 
 /**
- * The enumeration `Modifier` defines constants for all of the modifiers defined
- * by the Dart language and for a few additional flags that are useful.
+ * The constants for all of the modifiers defined by the Dart language and for a
+ * few additional flags that are useful.
  *
  * Clients may not extend, implement or mix-in this class.
  */
-class Modifier extends Enum<Modifier> {
+class Modifier implements Comparable<Modifier> {
   /**
    * Indicates that the modifier 'abstract' was applied to the element.
    */
   static const Modifier ABSTRACT = const Modifier('ABSTRACT', 0);
 
   /**
    * Indicates that an executable element has a body marked as being
    * asynchronous.
    */
   static const Modifier ASYNCHRONOUS = const Modifier('ASYNCHRONOUS', 1);
@@ skipping 96 matching lines @@
     GETTER,
     HAS_EXT_URI,
     IMPLICIT_TYPE,
     MIXIN_APPLICATION,
     REFERENCES_SUPER,
     SETTER,
     STATIC,
     SYNTHETIC
   ];
 
-  const Modifier(String name, int ordinal) : super(name, ordinal);
+  /**
+   * The name of this modifier.
+   */
+  final String name;
+
+  /**
+   * The ordinal value of the modifier.
+   */
+  final int ordinal;
+
+  const Modifier(this.name, this.ordinal);
+
+  @override
+  int get hashCode => ordinal;
+
+  @override
+  int compareTo(Modifier other) => ordinal - other.ordinal;
+
+  @override
+  String toString() => name;
 }
 
 /**
  * A concrete implementation of a [MultiplyDefinedElement].
  */
 class MultiplyDefinedElementImpl implements MultiplyDefinedElement {
   /**
    * The unique integer identifier of this element.
    */
   final int id = ElementImpl._NEXT_ID++;
@@ skipping 2100 matching lines @@
 
   @override
   void visitElement(Element element) {
     int offset = element.nameOffset;
     if (offset != -1) {
       map[offset] = element;
     }
     super.visitElement(element);
   }
 }