1 files changed, 71 insertions, 0 deletions
diff --git a/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/ToDictionary.cs b/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/ToDictionary.cs
new file mode 100644
index 0000000..919c1a1
--- /dev/null
+++ b/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/ToDictionary.cs
@@ -0,0 +1,71 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+#if !NO_PERF
+using System;
+using System.Collections.Generic;
+
+namespace System.Reactive.Linq.Observαble
+{
+    class ToDictionary<TSource, TKey, TElement> : Producer<IDictionary<TKey, TElement>>
+    {
+        private readonly IObservable<TSource> _source;
+        private readonly Func<TSource, TKey> _keySelector;
+        private readonly Func<TSource, TElement> _elementSelector;
+        private readonly IEqualityComparer<TKey> _comparer;
+
+        public ToDictionary(IObservable<TSource> source, Func<TSource, TKey> keySelector, Func<TSource, TElement> elementSelector, IEqualityComparer<TKey> comparer)
+        {
+            _source = source;
+            _keySelector = keySelector;
+            _elementSelector = elementSelector;
+            _comparer = comparer;
+        }
+
+        protected override IDisposable Run(IObserver<IDictionary<TKey, TElement>> observer, IDisposable cancel, Action<IDisposable> setSink)
+        {
+            var sink = new _(this, observer, cancel);
+            setSink(sink);
+            return _source.SubscribeSafe(sink);
+        }
+
+        class _ : Sink<IDictionary<TKey, TElement>>, IObserver<TSource>
+        {
+            private readonly ToDictionary<TSource, TKey, TElement> _parent;
+            private Dictionary<TKey, TElement> _dictionary;
+
+            public _(ToDictionary<TSource, TKey, TElement> parent, IObserver<IDictionary<TKey, TElement>> observer, IDisposable cancel)
+                : base(observer, cancel)
+            {
+                _parent = parent;
+                _dictionary = new Dictionary<TKey, TElement>(_parent._comparer);
+            }
+
+            public void OnNext(TSource value)
+            {
+                try
+                {
+                    _dictionary.Add(_parent._keySelector(value), _parent._elementSelector(value));
+                }
+                catch (Exception ex)
+                {
+                    base._observer.OnError(ex);
+                    base.Dispose();
+                }
+            }
+
+            public void OnError(Exception error)
+            {
+                base._observer.OnError(error);
+                base.Dispose();
+            }
+
+            public void OnCompleted()
+            {
+                base._observer.OnNext(_dictionary);
+                base._observer.OnCompleted();
+                base.Dispose();
+            }
+        }
+    }
+}
+#endif
+\ No newline at end of file