merge .FileFormats and .DataStructures

OpenRa.FileFormats/TypeDictionary.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using IjwFramework.Collections;
+
+namespace OpenRa.FileFormats
+{
+	public class TypeDictionary
+	{
+		Cache<Type, List<object>> innerInherit = new Cache<Type, List<object>>( _ => new List<object>() );
+
+		public void Add( object val )
+		{
+			var t = val.GetType();
+
+			foreach( var i in t.GetInterfaces() )
+				innerInherit[ i ].Add( val );
+			foreach( var tt in t.BaseTypes() )
+				innerInherit[ tt ].Add( val );
+		}
+
+		public bool Contains<T>()
+		{
+			return innerInherit[ typeof( T ) ].Count != 0;
+		}
+
+		public T Get<T>()
+		{
+			var l = innerInherit[ typeof( T ) ];
+			if( l.Count == 1 )
+				return (T)l[ 0 ];
+			else if( l.Count == 0 )
+				throw new InvalidOperationException( string.Format( "TypeDictionary does not contain instance of type `{0}`", typeof( T ) ) );
+			else
+				throw new InvalidOperationException( string.Format( "TypeDictionary contains multiple instance of type `{0}`", typeof( T ) ) );
+		}
+
+		public T GetOrDefault<T>()
+		{
+			var l = innerInherit[ typeof( T ) ];
+			if( l.Count == 1 )
+				return (T)l[ 0 ];
+			else if( l.Count == 0 )
+				return default( T );
+			else
+				throw new InvalidOperationException( string.Format( "TypeDictionary contains multiple instance of type `{0}`", typeof( T ) ) );
+		}
+
+		public IEnumerable<T> WithInterface<T>()
+		{
+			foreach( var i in innerInherit[ typeof( T ) ] )
+				yield return (T)i;
+		}
+
+		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;
+			}
+		}
+	}
+}