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TypeDictionary.cs
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TypeDictionary.cs
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#region Copyright & License Information
/*
* Copyright 2007-2010 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 LICENSE.
*/
#endregion
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
namespace OpenRA.FileFormats
{
public class TypeDictionary : IEnumerable
{
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 GetEnumerator()
{
return WithInterface<object>().GetEnumerator();
}
}
public static class TypeExts
{
public static IEnumerable<Type> BaseTypes( this Type t )
{
while( t != null )
{
yield return t;
t = t.BaseType;
}
}
}
}