Move Index and IndexStore implementations into Engine.

pkg/analysis_server/lib/src/index/store/collection.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 index.store.collection;
-
-import 'dart:collection';
-import 'dart:typed_data';
-
-
-/**
- * A hash map with `List<int>` keys and [int] values.
- */
-class IntArrayToIntMap {
-  final Map<Int32List, int> map = new HashMap<Int32List, int>(equals:
-      _intArrayEquals, hashCode: _intArrayHashCode);
-
-  /**
-   * Returns the value for the given [key] or null if [key] is not in the map.
-   */
-  int operator[](List<int> key) {
-    Int32List typedKey = _getTypedKey(key);
-    return map[typedKey];
-  }
-
-  /**
-   * Associates the [key] with the given [value].
-   *
-   * If the key was already in the map, its associated value is changed.
-   * Otherwise the key-value pair is added to the map.
-   */
-  void operator[]=(List<int> key, int value) {
-    Int32List typedKey = _getTypedKey(key);
-    map[typedKey] = value;
-  }
-
-  /**
-   * Returns an [Int32List] version of the given `List<int>` key.
-   */
-  static Int32List _getTypedKey(List<int> key) {
-    if (key is Int32List) {
-      return key;
-    }
-    return new Int32List.fromList(key);
-  }
-
-  static bool _intArrayEquals(List<int> a, List<int> b) {
-    int length = a.length;
-    if (length != b.length) {
-      return false;
-    }
-    for (int i = 0; i < length; i++) {
-      if (a[i] != b[i]) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  static int _intArrayHashCode(List<int> key) {
-    return key.fold(0, (int result, int item) {
-      return 31 * result + item;
-    });
-  }
-}
-
-
-/**
- * A table mapping [int] keys to sets of [int]s.
- */
-class IntToIntSetMap {
-  final Map<int, Int32List> _map = new HashMap<int, Int32List>();
-
-  /**
-   * The number of key-value pairs in the map.
-   */
-  int get length => _map.length;
-
-  /**
-   * Adds the [value] to the set associated with the given [value].
-   */
-  void add(int key, int value) {
-    Int32List values = _map[key];
-    if (values == null) {
-      values = new Int32List(1);
-      values[0] = value;
-      _map[key] = values;
-    }
-    if (values.indexOf(value) == -1) {
-      int length = values.length;
-      Int32List newSet = new Int32List(length + 1);
-      newSet.setRange(0, length, values);
-      newSet[length] = value;
-      _map[key] = newSet;
-    }
-  }
-
-  /**
-   * Removes all pairs from the map.
-   */
-  void clear() {
-    _map.clear();
-  }
-
-  /**
-   * Returns the set of [int]s for the given [key] or an empty list if [key] is
-   * not in the map.
-   */
-  List<int> get(int key) {
-    List<int> values = _map[key];
-    if (values == null) {
-      values = <int>[];
-    }
-    return values;
-  }
-}