/src/LinFu.Proxy/ProxyFactoryExtensions.cs

 1using System;
 2using System.Collections.Generic;
 3using System.Linq;
 4using System.Text;
 5using LinFu.AOP.Interfaces;
 6using LinFu.Proxy.Interfaces;
 7
 8namespace LinFu.Proxy
 9{
10    /// <summary>
11    /// Extends the <see cref="IProxyFactory"/> class to support
12    /// instantiating proxy types.
13    /// </summary>
14    public static class ProxyFactoryExtensions
15    {
16        /// <summary>
17        /// Uses the <paramref name="factory"/> to create a proxy instance 
18        /// that directly derives from the <paramref name="instanceType"/> 
19        /// and implements the given <paramref name="baseInterfaces"/>.
20        /// The <paramref name="wrapper"/> instance, in turn, will be used
21        /// to intercept the method calls made to the proxy itself.
22        /// </summary>
23        /// <param name="factory">The IProxyFactory instance that will be used to generate the proxy type.</param>
24        /// <param name="instanceType">The type that will be intercepted by the proxy.</param>
25        /// <param name="wrapper">The <see cref="IInvokeWrapper"/> instance that will be used to intercept method calls made to the proxy.</param>
26        /// <param name="baseInterfaces">The additional list of interfaces that the proxy will implement.</param>
27        /// <returns>A valid proxy instance.</returns>
28        public static object CreateProxy(this IProxyFactory factory, Type instanceType, 
29            IInvokeWrapper wrapper, params Type[] baseInterfaces)
30        {
31            // Convert the wrapper to an IInterceptor instance.
32            var adapter = new CallAdapter(wrapper);
33            return factory.CreateProxy(instanceType, adapter, baseInterfaces);
34        }
35
36        /// <summary>
37        /// Uses the <paramref name="factory"/> to create a proxy instance 
38        /// that directly derives from the <paramref name="instanceType"/> 
39        /// and implements the given <paramref name="baseInterfaces"/>.
40        /// The <paramref name="interceptor"/> instance, in turn, will be used
41        /// to intercept the method calls made to the proxy itself.
42        /// </summary>
43        /// <param name="factory">The IProxyFactory instance that will be used to generate the proxy type.</param>
44        /// <param name="instanceType">The type that will be intercepted by the proxy.</param>
45        /// <param name="interceptor">The <see cref="IInterceptor"/> instance that will be used to intercept method calls made to the proxy.</param>
46        /// <param name="baseInterfaces">The additional list of interfaces that the proxy will implement.</param>
47        /// <returns>A valid proxy instance.</returns>
48        public static object CreateProxy(this IProxyFactory factory, Type instanceType, 
49            IInterceptor interceptor, params Type[] baseInterfaces)
50        {
51            var proxyType = factory.CreateProxyType(instanceType, baseInterfaces);
52            var proxyInstance = (IProxy)Activator.CreateInstance(proxyType);
53
54            proxyInstance.Interceptor = interceptor;
55
56            return proxyInstance;
57        }
58
59        /// <summary>
60        /// Uses the <paramref name="factory"/> to create a proxy instance 
61        /// that directly derives from the <typeparamref name="T"/> type
62        /// and implements the given <paramref name="baseInterfaces"/>.
63        /// The <paramref name="wrapper"/> instance, in turn, will be used
64        /// to intercept the method calls made to the proxy itself.
65        /// </summary>
66        /// <typeparam name="T">The type that will be intercepted by the proxy.</typeparam>
67        /// <param name="factory">The IProxyFactory instance that will be used to generate the proxy type.</param>        
68        /// <param name="wrapper">The <see cref="IInvokeWrapper"/> instance that will be used to intercept method calls made to the proxy.</param>
69        /// <param name="baseInterfaces">The additional list of interfaces that the proxy will implement.</param>
70        /// <returns>A valid proxy instance.</returns>
71        public static T CreateProxy<T>(this IProxyFactory factory, IInvokeWrapper wrapper, 
72            params Type[] baseInterfaces)
73        {
74            return (T) factory.CreateProxy(typeof (T), wrapper, baseInterfaces);
75        }
76
77        /// <summary>
78        /// Uses the <paramref name="factory"/> to create a proxy instance 
79        /// that directly derives from the <typeparamref name="T"/> type
80        /// and implements the given <paramref name="baseInterfaces"/>.
81        /// The <paramref name="interceptor"/> instance, in turn, will be used
82        /// to intercept the method calls made to the proxy itself.
83        /// </summary>
84        /// <typeparam name="T">The type that will be intercepted by the proxy.</typeparam>
85        /// <param name="factory">The IProxyFactory instance that will be used to generate the proxy type.</param>        
86        /// <param name="interceptor">The <see cref="IInterceptor"/> instance that will be used to intercept method calls made to the proxy.</param>
87        /// <param name="baseInterfaces">The additional list of interfaces that the proxy will implement.</param>
88        /// <returns>A valid proxy instance.</returns>
89        public static T CreateProxy<T>(this IProxyFactory factory, IInterceptor interceptor, 
90            params Type[] baseInterfaces)
91        {
92            return (T) factory.CreateProxy(typeof (T), interceptor, baseInterfaces);
93        }
94    }
95}