ScopeExtensions.cs

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// 
//  Copyright 2010-2015 Deveel
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
//

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;

namespace Deveel.Data.Services {
    public static class ScopeExtensions {
        public static object Resolve(this IScope scope, Type serviceType) {
            return scope.Resolve(serviceType, null);
        }

        public static TService Resolve<TService>(this IScope scope, object serviceKey) {
            return (TService) scope.Resolve(typeof(TService), serviceKey);
        }

        public static TService Resolve<TService>(this IScope scope) {
            return scope.Resolve<TService>(null);
        }

        public static IEnumerable<TService> ResolveAll<TService>(this IScope scope) {
            return scope.ResolveAll(typeof (TService)).Cast<TService>();
        }

        public static void Register(this IScope scope, Type serviceType, Type implementationType, object serviceKey) {
            var registration = new ServiceRegistration(serviceType, implementationType);
            registration.ServiceKey = serviceKey;
            scope.Register(registration);
        }

        public static void Register(this IScope scope, Type serviceType) {
            Register(scope, serviceType, null);
        }

        public static void Register(this IScope scope, Type serviceType, object serviceKey) {
            if (serviceType == null)
                throw new ArgumentNullException("serviceType");

            if (!serviceType.IsClass)
                throw new ArgumentException(String.Format("The service type '{0}' to register is not a class.", serviceType));

            var interfaces = serviceType.GetInterfaces();
            foreach (var interfaceType in interfaces) {
                scope.Register(interfaceType, serviceType, serviceKey);
            }

            scope.Register(serviceType, serviceType, serviceKey);
        }

        public static void Register<TService, TImplementation>(this IScope scope, object serviceKey)
            where TImplementation : class, TService {
            scope.Register(typeof(TService), typeof(TImplementation), serviceKey);
        }

        public static void Register<TService, TImplementation>(this IScope scope)
            where TImplementation : class, TService {
            scope.Register<TService, TImplementation>(null);
        }

        public static void Register<TService>(this IScope scope, object serviceKey)
            where TService : class {
            scope.Register(typeof(TService), serviceKey);
        }

        public static void Register<TService>(this IScope scope)
            where TService : class {
            scope.Register<TService>(null);
        }

        public static void RegisterInstance(this IScope scope, Type serviceType, object instance) {
            RegisterInstance(scope, serviceType, instance, null);
        }

        public static void RegisterInstance(this IScope scope, Type serviceType, object instance, object serviceKey) {
            if (serviceType == null)
                throw new ArgumentNullException("serviceType");
            if (instance == null)
                throw new ArgumentNullException("instance");

            var implementationType = instance.GetType();
            var registration = new ServiceRegistration(serviceType, implementationType);
            registration.Instance = instance;
            registration.ServiceKey = serviceKey;
            scope.Register(registration);
        }

        public static void RegisterInstance<TService>(this IScope scope, TService instance) where TService : class {
            RegisterInstance(scope, instance, null);
        }

        public static void RegisterInstance<TService>(this IScope scope, TService instance, object serviceKey) where TService : class {
            var interfaces = typeof (TService).GetInterfaces();
            foreach (var interfaceType in interfaces) {
                scope.RegisterInstance(interfaceType, instance, serviceKey);
            }

            scope.RegisterInstance(typeof(TService), instance, serviceKey);
        }

        public static bool Unregister(this IScope scope, Type serviceType) {
            return scope.Unregister(serviceType, null);
        }

        public static bool Unregister<TService>(this IScope scope, object serviceKey) {
            return scope.Unregister(typeof (TService), serviceKey);
        }

        public static bool Unregister<TService>(this IScope scope) {
            return scope.Unregister<TService>(null);
        }

        public static void Replace(this IScope scope, Type serviceType, Type implementationType) {
            scope.Replace(serviceType, implementationType, null);
        }

        public static void Replace(this IScope scope, Type serviceType, Type implementationType, object serviceKey) {
            if (scope.Unregister(serviceType, serviceKey))
                scope.Register(serviceType, implementationType, serviceKey);
        }

        public static void Replace<TService, TImplementation>(this IScope scope)
            where TImplementation : class, TService {
            scope.Replace<TService, TImplementation>(null);
        }

        public static void Replace<TService, TImplementation>(this IScope scope, object serviceKey)
            where TImplementation : class, TService {
            scope.Replace(typeof(TService), typeof(TImplementation), serviceKey);
        }
    }
}