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using System;
using System.Collections.Generic;
namespace Xamarin.Forms
{
/// <summary>
/// Helper that handles storing and lookup of platform specifics implementations
/// </summary>
/// <typeparam name="TElement">The Element type</typeparam>
internal class PlatformConfigurationRegistry<TElement> : IElementConfiguration<TElement>
where TElement : Element
{
readonly TElement _element;
readonly Dictionary<Type, object> _platformSpecifics = new Dictionary<Type, object>();
internal PlatformConfigurationRegistry(TElement element)
{
_element = element;
}
public IPlatformElementConfiguration<T, TElement> On<T>() where T : IConfigPlatform
{
if (_platformSpecifics.ContainsKey(typeof(T)))
{
return (IPlatformElementConfiguration<T, TElement>)_platformSpecifics[typeof(T)];
}
var emptyConfig = Configuration<T, TElement>.Create(_element);
_platformSpecifics.Add(typeof(T), emptyConfig);
return emptyConfig;
}
}
}
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