Everything is now OpenRA, not OpenRa

OpenRA.FileFormats/TypeDictionary.cs

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+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace OpenRA.FileFormats
+{
+	public class TypeDictionary
+	{
+		Dictionary<Type, object> dataSingular = new Dictionary<Type, object>();
+		Dictionary<Type, List<object>> dataMultiple = new Dictionary<Type, List<object>>();
+
+		public void Add( object val )
+		{
+			var t = val.GetType();
+
+			foreach( var i in t.GetInterfaces() )
+				InnerAdd( i, val );
+			foreach( var tt in t.BaseTypes() )
+				InnerAdd( tt, val );
+		}
+
+		void InnerAdd( Type t, object val )
+		{
+			List<object> objs;
+			object obj;
+
+			if( dataMultiple.TryGetValue( t, out objs ) )
+				objs.Add( val );
+			else if( dataSingular.TryGetValue( t, out obj ) )
+			{
+				dataSingular.Remove( t );
+				dataMultiple.Add( t, new List<object> { obj, val } );
+			}
+			else
+				dataSingular.Add( t, val );
+		}
+
+		public bool Contains<T>()
+		{
+			return dataSingular.ContainsKey( typeof( T ) ) || dataMultiple.ContainsKey( typeof( T ) );
+		}
+
+		public T Get<T>()
+		{
+			if( dataMultiple.ContainsKey( typeof( T ) ) )
+				throw new InvalidOperationException( string.Format( "TypeDictionary contains multiple instance of type `{0}`", typeof( T ) ) );
+
+			object ret;
+			if( !dataSingular.TryGetValue( typeof( T ), out ret ) )
+				throw new InvalidOperationException(string.Format("TypeDictionary does not contain instance of type `{0}`", typeof(T)));
+			return (T)ret;
+		}
+
+		public T GetOrDefault<T>()
+		{
+			if( dataMultiple.ContainsKey( typeof( T ) ) )
+				throw new InvalidOperationException( string.Format( "TypeDictionary contains multiple instance of type `{0}`", typeof( T ) ) );
+
+			object ret;
+			if( !dataSingular.TryGetValue( typeof( T ), out ret ) )
+				return default( T );
+			return (T)ret;
+		}
+
+		public IEnumerable<T> WithInterface<T>()
+		{
+			List<object> objs;
+			object obj;
+
+			if( dataMultiple.TryGetValue( typeof( T ), out objs ) )
+				return objs.Cast<T>();
+			else if( dataSingular.TryGetValue( typeof( T ), out obj ) )
+				return new T[] { (T)obj };
+			else
+				return new T[ 0 ];
+		}
+
+		public IEnumerator<object> GetEnumerator()
+		{
+			return WithInterface<object>().GetEnumerator();
+		}
+	}
+
+	static class TypeExts
+	{
+		public static IEnumerable<Type> BaseTypes( this Type t )
+		{
+			while( t != null )
+			{
+				yield return t;
+				t = t.BaseType;
+			}
+		}
+	}
+}