Refactoring to remove static Rules & SequenceProvider

OpenRA.Game/Primitives/ReadOnlyDictionary.cs

@@ -0,0 +1,90 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+
+namespace OpenRA
+{
+	/// <summary>
+	/// A minimal read only dictionary interface for .NET 4
+	/// </summary>
+	/// <remarks>
+	/// .NET 4.5 has an implementation built-in, this code is not meant to
+	/// duplicate it but provide a compatible interface that can be replaced
+	/// when we switch to .NET 4.5 or higher.
+	/// </remarks>
+	public interface IReadOnlyDictionary<TKey, TValue> : IEnumerable<KeyValuePair<TKey, TValue>>
+	{
+		int Count { get; }
+		TValue this[TKey key] { get; }
+		IEnumerable<TKey> Keys { get; }
+		IEnumerable<TValue> Values { get; }
+
+		bool ContainsKey(TKey key);
+		bool TryGetValue(TKey key, out TValue value);
+	}
+
+	/// <summary>
+	/// A minimal read only dictionary for .NET 4 implemented as a wrapper
+	/// around an IDictionary.
+	/// </summary>
+	public class ReadOnlyDictionary<TKey, TValue> : IReadOnlyDictionary<TKey, TValue>
+	{
+		private readonly IDictionary<TKey, TValue> dict;
+
+		public ReadOnlyDictionary()
+			: this(new Dictionary<TKey, TValue>())
+		{
+		}
+
+		public ReadOnlyDictionary(IDictionary<TKey, TValue> dict)
+		{
+			if (dict == null)
+				throw new ArgumentNullException("dict");
+
+			this.dict = dict;
+		}
+
+		#region IReadOnlyDictionary implementation
+		public bool ContainsKey(TKey key)
+		{
+			return dict.ContainsKey(key);
+		}
+
+		public bool TryGetValue(TKey key, out TValue value)
+		{
+			return dict.TryGetValue(key, out value);
+		}
+
+		public int Count { get { return dict.Count; } }
+
+		public TValue this[TKey key] { get { return dict[key]; } }
+
+		public IEnumerable<TKey> Keys { get { return dict.Keys; } }
+
+		public IEnumerable<TValue> Values { get { return dict.Values; } }
+		#endregion
+
+		#region IEnumerable implementation
+		public IEnumerator<KeyValuePair<TKey, TValue>> GetEnumerator()
+		{
+			return dict.GetEnumerator();
+		}
+		#endregion
+
+		#region IEnumerable implementation
+		System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
+		{
+			return dict.GetEnumerator();
+		}
+		#endregion
+	}
+}