HostAdapter.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 / fx / src / AddIn / AddIn / System / Addin / Hosting / Store / HostAdapter.cs / 1305376 / HostAdapter.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class:  HostAdapter 
**
** Purpose: Represents an host adapter class on disk. 
**
===========================================================*/
using System;
using System.IO; 
using System.Collections.Generic;
using System.Collections.ObjectModel; 
using System.Globalization; 
using System.Reflection;
using System.Text; 
using System.AddIn.Contract;
using System.AddIn.MiniReflection;
using System.Diagnostics.Contracts;
 
namespace System.AddIn
{ 
    [Serializable] 
    internal sealed class HostAdapter : PipelineComponent
    { 
        private static readonly TypeInfo typeofIContract = new TypeInfo(typeof(System.AddIn.Contract.IContract));

        private TypeInfo[] _potentialHAVs;
        private List _constructors; 

        public HostAdapter(TypeInfo typeInfo, String assemblyLocation) 
            : base(typeInfo, assemblyLocation) 
        {
            _constructors = new List(); 
        }

        public List Constructors
        { 
            get { return _constructors; }
        } 
 
        public TypeInfo[] HostAddinViews
        { 
            get { return _potentialHAVs; }
        }

        public override string ToString() 
        {
            return String.Format(CultureInfo.CurrentCulture, Res.HostAdapterToString, Name, BestAvailableLocation); 
        } 

        internal override bool Validate(TypeInfo type, Collection warnings) 
        {
            _potentialHAVs = FindBaseTypesAndInterfaces(type);

            if (_potentialHAVs.Length == 0) 
            {
                return false; 
            } 

            foreach (MiniConstructorInfo ci in type.GetConstructors(true)) 
            {
                MiniParameterInfo[] pars = ci.GetParameters();
                if (pars.Length != 1)
                { 
                    warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.HostAdapterUnusableCtorMultipleParams, type.AssemblyQualifiedName));
                    continue; 
                } 

                TypeInfo paramType = pars[0].ParameterType; 
                bool success = false;
                try
                {
                    if (paramType.IsInterface && (paramType.Implements(typeofIContract))) 
                    {
                        _constructors.Add(paramType); 
                        success = true; 
                    }
                } 
                catch (FileNotFoundException) { }
                catch (FileLoadException)
                {
                    // Can happen for a constructor taking a type that isn't in mscorlib nor System.AddIn.Contract, and 
                    // also isn't in any of the directories that we would probe.
                } 
                if (!success) 
                {
                    warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.HostAdapterUnusableCtorBadParam, type.AssemblyQualifiedName, paramType.FullName)); 
                    continue;
                }
            }
            if (_constructors.Count == 0) 
            {
                warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.HostAdapterNoValidCtors, type.AssemblyQualifiedName)); 
                return false; 
            }
 
            return base.Validate(type, warnings);
        }
    }
} 

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

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