Cache ElementLocation instance and index key/location ids.

pkg/analyzer/lib/src/generated/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.
 
 // 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.element;
 
 import 'dart:collection';
@@ skipping 3436 matching lines @@
    * An array containing all of the metadata associated with this element.
    */
   List<ElementAnnotation> metadata = ElementAnnotationImpl.EMPTY_ARRAY;
 
   /**
    * A cached copy of the calculated hashCode for this element.
    */
   int _cachedHashCode = 0;
 
   /**
+   * A cached copy of the calculated location for this element.
+   */
+  ElementLocation _cachedLocation;
+
+  /**
    * Initialize a newly created element to have the given name.
    *
    * @param name the name of this element
    * @param nameOffset the offset of the name of this element in the file that contains the
    *          declaration of this element
    */
   ElementImpl(String name, this.nameOffset) {
     this._name = StringUtilities.intern(name);
   }
 
@@ skipping 85 matching lines @@
   bool get isPublic => !isPrivate;
 
   @override
   bool get isSynthetic => hasModifier(Modifier.SYNTHETIC);
 
   @override
   LibraryElement get library =>
       getAncestor((element) => element is LibraryElement);
 
   @override
-  ElementLocation get location => new ElementLocationImpl.con1(this);
+  ElementLocation get location {
+    if (_cachedLocation == null) {
+      _cachedLocation = new ElementLocationImpl.con1(this);
+    }
+    return _cachedLocation;
+  }
 
   @override
   String get name => _name;
 
   @override
   AstNode get node => getNodeMatching((node) => node is AstNode);
 
   @override
   Source get source {
     if (_enclosingElement == null) {
@@ skipping 369 matching lines @@
    * The character used to separate components in the encoded form.
    */
   static int _SEPARATOR_CHAR = 0x3B;
 
   /**
    * The path to the element whose location is represented by this object.
    */
   List<String> _components;
 
   /**
+   * The object managing [indexKeyId] and [indexLocationId].
+   */
+  Object indexOwner;
+
+  /**
+   * A cached id of this location in index.
+   */
+  int indexKeyId;
+
+  /**
+   * A cached id of this location in index.
+   */
+  int indexLocationId;
+
+  /**
    * Initialize a newly created location to represent the given element.
    *
    * @param element the element whose location is being represented
    */
   ElementLocationImpl.con1(Element element) {
     List<String> components = new List<String>();
     Element ancestor = element;
     while (ancestor != null) {
       components.insert(0, (ancestor as ElementImpl).identifier);
       ancestor = ancestor.enclosingElement;
@@ skipping 8501 matching lines @@
     // bottom <: void (as bottom is a subtype of all types).
     // void <: dynamic (as dynamic is a supertype of all types)
     return identical(type, this) || type.isDynamic;
   }
 
   @override
   VoidTypeImpl substitute2(List<DartType> argumentTypes,
       List<DartType> parameterTypes) =>
       this;
 }