//-----------------------------------------------------------------------------
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.ComIntegration
{
    using System;
    using System.Reflection;
    using System.EnterpriseServices;
    using System.Runtime.InteropServices;
    using System.Runtime.Serialization;
    using System.ServiceModel;
 
    static class ComPlusTypeValidator
    {
        static Guid IID_Object = new Guid("{65074F7F-63C0-304E-AF0A-D51741CB4A8D}");
        static Guid IID_IDisposable = new Guid("{805D7A98-D4AF-3F0F-967F-E5CF45312D2C}");
        static Guid IID_IManagedObject = new Guid("{C3FCC19E-A970-11D2-8B5A-00A0C9B7C9C4}");
        static Guid IID_IProcessInitializer = new Guid("{1113F52D-DC7F-4943-AED6-88D04027E32A}");
        static Guid IID_IRemoteDispatch = new Guid("{6619A740-8154-43BE-A186-0319578E02DB}");
        static Guid IID_IServicedComponentInfo = new Guid("{8165B19E-8D3A-4D0B-80C8-97DE310DB583}");
 
        public static bool IsValidInterface(Guid iid)
        {
            if (iid == IID_Object ||
                iid == IID_IDisposable ||
                iid == IID_IManagedObject ||
                iid == IID_IProcessInitializer ||
                iid == IID_IRemoteDispatch ||
                iid == IID_IServicedComponentInfo ||
                iid.ToString("D").EndsWith("C000-000000000046", StringComparison.OrdinalIgnoreCase)) //other ole/com standard interfaces
            {
                return false;
            }
 
            return true;
        }
 
        public static bool IsValidParameter(Type type, ICustomAttributeProvider attributeProvider, bool allowReferences)        
        {
 
            object[] attributes = System.ServiceModel.Description.ServiceReflector.GetCustomAttributes(attributeProvider, typeof(MarshalAsAttribute), true);
 
            foreach (MarshalAsAttribute attr in attributes)
            {
                UnmanagedType marshalAs = attr.Value;
 
                if (marshalAs == UnmanagedType.IDispatch ||
                    marshalAs == UnmanagedType.Interface ||
                    marshalAs == UnmanagedType.IUnknown)
                {
                    return allowReferences;
                }
            }
 
            XsdDataContractExporter exporter = new XsdDataContractExporter();
            if (!exporter.CanExport(type))
            {
                return false;
            }
 
            return true;
        }
    }
}