Convert subclasses of Enum

pkg/analyzer/lib/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.
 
 /**
  * Defines the element model. The element model describes the semantic (as
  * opposed to syntactic) structure of Dart code. The syntactic structure of the
  * code is modeled by the [AST structure](../ast/ast.dart).
  *
  * The element model consists of two closely related kinds of objects: elements
@@ skipping 22 matching lines @@
  * representation of the statements in a method body, but if one of those
  * statements declares a local variable then the local variable will be
  * represented by an element.
  */
 library analyzer.dart.element.element;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/src/generated/engine.dart' show AnalysisContext;
-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/source.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
 import 'package:analyzer/src/task/dart.dart';
 import 'package:analyzer/task/model.dart' show AnalysisTarget;
 
 /**
  * An element that represents a class.
  *
@@ skipping 803 matching lines @@
 
   /**
    * Return a representation of the value of this annotation, forcing the value
    * to be computed if it had not previously been computed, or `null` if the
    * value of this annotation could not be computed because of errors.
    */
   DartObject computeConstantValue();
 }
 
 /**
- * The enumeration `ElementKind` defines the various kinds of elements in the
- * element model.
+ * The kind of elements in the element model.
  *
  * Clients may not extend, implement or mix-in this class.
  */
-class ElementKind extends Enum<ElementKind> {
+class ElementKind implements Comparable<ElementKind> {
   static const ElementKind CLASS = const ElementKind('CLASS', 0, "class");
 
   static const ElementKind COMPILATION_UNIT =
       const ElementKind('COMPILATION_UNIT', 1, "compilation unit");
 
   static const ElementKind CONSTRUCTOR =
       const ElementKind('CONSTRUCTOR', 2, "constructor");
 
   static const ElementKind DYNAMIC =
       const ElementKind('DYNAMIC', 3, "<dynamic>");
@@ skipping 64 matching lines @@
     PARAMETER,
     PREFIX,
     SETTER,
     TOP_LEVEL_VARIABLE,
     FUNCTION_TYPE_ALIAS,
     TYPE_PARAMETER,
     UNIVERSE
   ];
 
   /**
+   * The name of this element kind.
+   */
+  final String name;
+
+  /**
+   * The ordinal value of the element kind.
+   */
+  final int ordinal;
+
+  /**
    * The name displayed in the UI for this kind of element.
    */
   final String displayName;
 
   /**
    * Initialize a newly created element kind to have the given [displayName].
    */
-  const ElementKind(String name, int ordinal, this.displayName)
-      : super(name, ordinal);
+  const ElementKind(this.name, this.ordinal, this.displayName);
+
+  @override
+  int get hashCode => ordinal;
+
+  @override
+  int compareTo(ElementKind other) => ordinal - other.ordinal;
+
+  @override
+  String toString() => name;
 
   /**
    * Return the kind of the given [element], or [ERROR] if the element is
    * `null`. This is a utility method that can reduce the need for null checks
    * in other places.
    */
   static ElementKind of(Element element) {
     if (element == null) {
       return ERROR;
     }
@@ skipping 1035 matching lines @@
   DartType get type;
 
   /**
    * Return a representation of the value of this variable, forcing the value
    * to be computed if it had not previously been computed, or `null` if either
    * this variable was not declared with the 'const' modifier or if the value of
    * this variable could not be computed because of errors.
    */
   DartObject computeConstantValue();
 }