ProxyAttribute.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Runtime / Remoting / ProxyAttribute.cs / 1305376 / ProxyAttribute.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** File:    ProxyAttribute.cs 
**
** 
** Purpose: Defines the attribute that is used on types which
**          need custom proxies.
**
** 
===========================================================*/
namespace System.Runtime.Remoting.Proxies { 
 
    using System.Reflection;
    using System.Runtime.Remoting.Activation; 
    using System.Runtime.Remoting.Contexts;
    using System.Security.Permissions;

    // Attribute for types that need custom proxies 
    [System.Security.SecurityCritical]  // auto-generated_required
    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)] 
    [SecurityPermissionAttribute(SecurityAction.InheritanceDemand, Flags=SecurityPermissionFlag.Infrastructure)] 
    [System.Runtime.InteropServices.ComVisible(true)]
    public class ProxyAttribute : Attribute , IContextAttribute 
    {
        public ProxyAttribute()
        {
            // Default constructor 
        }
 
        // Default implementation of CreateInstance uses our activation services to create an instance 
        // of the transparent proxy or an uninitialized marshalbyrefobject and returns it.
 
        [System.Security.SecurityCritical]  // auto-generated
        public virtual MarshalByRefObject CreateInstance(Type serverType)
        {
            if (serverType == null) 
                throw new ArgumentNullException("serverType");
 
            RuntimeType rt = serverType as RuntimeType; 
            if (rt == null)
                throw new ArgumentException(Environment.GetResourceString("Argument_MustBeRuntimeType")); 

            if (!serverType.IsContextful)
            {
                throw new RemotingException( 
                    Environment.GetResourceString(
                        "Remoting_Activation_MBR_ProxyAttribute")); 
            } 
            if (serverType.IsAbstract)
            { 
                throw new RemotingException(
                    Environment.GetResourceString(
                        "Acc_CreateAbst"));
            } 
            return CreateInstanceInternal(rt);
        } 
 
        internal MarshalByRefObject CreateInstanceInternal(RuntimeType serverType)
        { 
            return ActivationServices.CreateInstance(serverType);
        }

        // Default implementation of CreateProxy creates an instance of our 
        // remoting proxy
 
        [System.Security.SecurityCritical]  // auto-generated 
        public virtual RealProxy CreateProxy(ObjRef objRef,
                                             Type serverType, 
                                             Object serverObject,
                                             Context serverContext)
        {
            RemotingProxy rp =  new RemotingProxy(serverType); 

            // If this is a serverID, set the native context field in the TP 
            if (null != serverContext) 
            {
                RealProxy.SetStubData(rp, serverContext.InternalContextID); 
            }

            if (objRef != null && objRef.GetServerIdentity().IsAllocated)
            { 
                rp.SetSrvInfo(objRef.GetServerIdentity(), objRef.GetDomainID());
            } 
 
            // Set the flag indicating that the fields of the proxy
            // have been initialized 
            rp.Initialized = true;

            // Sanity check
            Type t = serverType; 
            if (!t.IsContextful &&
                !t.IsMarshalByRef && 
                (null != serverContext)) 
            {
                throw new RemotingException( 
                    Environment.GetResourceString(
                        "Remoting_Activation_MBR_ProxyAttribute"));
            }
 
            return rp;
        } 
 
        // implementation of interface IContextAttribute
        [System.Security.SecurityCritical] 
        [System.Runtime.InteropServices.ComVisible(true)]
        public bool IsContextOK(Context ctx, IConstructionCallMessage msg)
        {
            // always happy... 
            return true;
        } 
 
        [System.Security.SecurityCritical]
        [System.Runtime.InteropServices.ComVisible(true)] 
        public void GetPropertiesForNewContext(IConstructionCallMessage msg)
        {
            // chill.. do nothing.
            return; 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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