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// ==++==
//
// 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;
}
}
}
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