New analyzer snapshot.

editor/util/plugins/com.google.dart.java2dart/resources/utilities_collection_include.dart

+
+
+/**
+ * Instances of the class `SingleMapIterator` implement an iterator that can be used to access
+ * the entries in a single map.
+ */
+class SingleMapIterator<K, V> implements MapIterator<K, V> {
+  /**
+   * Returns a new [SingleMapIterator] instance for the given [Map].
+   */
+  static SingleMapIterator forMap(Map map) => new SingleMapIterator(map);
+
+  /**
+   * The [Map] containing the entries to be iterated over.
+   */
+  final Map<K, V> _map;
+
+  /**
+   * The iterator used to access the entries.
+   */
+  Iterator<K> _keyIterator;
+
+  /**
+   * The current key, or `null` if there is no current key.
+   */
+  K _currentKey;
+
+  /**
+   * The current value.
+   */
+  V _currentValue;
+
+  /**
+   * Initialize a newly created iterator to return the entries from the given map.
+   *
+   * @param map the map containing the entries to be iterated over
+   */
+  SingleMapIterator(this._map) {
+    this._keyIterator = _map.keys.iterator;
+  }
+
+  @override
+  K get key {
+    if (_currentKey == null) {
+      throw new NoSuchElementException();
+    }
+    return _currentKey;
+  }
+
+  @override
+  V get value {
+    if (_currentKey == null) {
+      throw new NoSuchElementException();
+    }
+    return _currentValue;
+  }
+
+  @override
+  bool moveNext() {
+    if (_keyIterator.moveNext()) {
+      _currentKey = _keyIterator.current;
+      _currentValue = _map[_currentKey];
+      return true;
+    } else {
+      _currentKey = null;
+      return false;
+    }
+  }
+
+  @override
+  void set value(V newValue) {
+    if (_currentKey == null) {
+      throw new NoSuchElementException();
+    }
+    _currentValue = newValue;
+    _map[_currentKey] = newValue;
+  }
+}