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GameServiceContainer.cs
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GameServiceContainer.cs
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// MIT License - Copyright (C) The Mono.Xna Team
// This file is subject to the terms and conditions defined in
// file 'LICENSE.txt', which is part of this source code package.
using System;
using System.Collections.Generic;
using MonoGame.Framework.Utilities;
namespace Microsoft.Xna.Framework
{
/// <summary>
/// A container for services for a <see cref="Game"/>.
/// </summary>
public class GameServiceContainer : IServiceProvider
{
Dictionary<Type, object> services;
/// <summary>
/// Create an empty <see cref="GameServiceContainer"/>.
/// </summary>
public GameServiceContainer()
{
services = new Dictionary<Type, object>();
}
/// <summary>
/// Add a service provider to this container.
/// </summary>
/// <param name="type">The type of the service.</param>
/// <param name="provider">The provider of the service.</param>
/// <exception cref="ArgumentNullException">
/// If <paramref name="type"/> or <paramref name="provider"/> is <code>null</code>.
/// </exception>
/// <exception cref="ArgumentException">
/// If <paramref name="provider"/> cannot be assigned to <paramref name="type"/>.
/// </exception>
public void AddService(Type type, object provider)
{
if (type == null)
throw new ArgumentNullException("type");
if (provider == null)
throw new ArgumentNullException("provider");
if (!ReflectionHelpers.IsAssignableFrom(type, provider))
throw new ArgumentException("The provider does not match the specified service type!");
services.Add(type, provider);
}
/// <summary>
/// Get a service provider for the service of the specified type.
/// </summary>
/// <param name="type">The type of the service.</param>
/// <returns>
/// A service provider for the service of the specified type or <code>null</code> if
/// no suitable service provider is registered in this container.
/// </returns>
/// <exception cref="ArgumentNullException">If the specified type is <code>null</code>.</exception>
public object GetService(Type type)
{
if (type == null)
throw new ArgumentNullException("type");
object service;
if (services.TryGetValue(type, out service))
return service;
return null;
}
/// <summary>
/// Remove the service with the specified type. Does nothing no service of the specified type is registered.
/// </summary>
/// <param name="type">The type of the service to remove.</param>
/// <exception cref="ArgumentNullException">If the specified type is <code>null</code>.</exception>
public void RemoveService(Type type)
{
if (type == null)
throw new ArgumentNullException("type");
services.Remove(type);
}
/// <summary>
/// Add a service provider to this container.
/// </summary>
/// <typeparam name="T">The type of the service.</typeparam>
/// <param name="provider">The provider of the service.</param>
/// <exception cref="ArgumentNullException">
/// If <paramref name="provider"/> is <code>null</code>.
/// </exception>
public void AddService<T>(T provider)
{
AddService(typeof(T), provider);
}
/// <summary>
/// Get a service provider of the specified type.
/// </summary>
/// <typeparam name="T">The type of the service provider.</typeparam>
/// <returns>
/// A service provider of the specified type or <code>null</code> if
/// no suitable service provider is registered in this container.
/// </returns>
public T GetService<T>() where T : class
{
var service = GetService(typeof(T));
if (service == null)
return null;
return (T)service;
}
}
}