AddIn.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / AddIn / AddIn / System / Addin / Hosting / Store / AddIn.cs / 1305376 / AddIn.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class:  AddIn 
**
** Purpose: Represents an add-in on disk 
**
===========================================================*/
using System;
using System.Collections.ObjectModel; 
using System.Collections.Generic;
using System.Diagnostics; 
using System.Globalization; 
using System.IO;
using System.Reflection; 
using System.Text;
using System.Threading;
using System.AddIn.MiniReflection;
using System.Diagnostics.Contracts; 

namespace System.AddIn 
{ 
    [Serializable]
    internal sealed class AddIn : PipelineComponent 
    {
        private TypeInfo[] _potentialAddinBases;
        private String _version;
        private String _assemblyName; 

        private ResourceState _unlocalized;  // hard-coded strings 
 
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1823:AvoidUnusedPrivateFields", Justification="May be used for localization later")]
        [NonSerialized] 
        private String _fullPathToAddIn;

        // For localization
#if LOCALIZABLE_ADDIN_ATTRIBUTE 
        private String _resMgrBaseName;
        private String _nameResource; 
        private String _publisherResource; 
        private String _descriptionResource;
        private ResourceState _localizedResources; 
#endif

        internal AddIn(TypeInfo typeInfo, String assemblyLocation, String fullPathToAddin, String assemblyName)
            : base(typeInfo, assemblyLocation) 
        {
            System.Diagnostics.Contracts.Contract.Requires(Path.IsPathRooted(fullPathToAddin)); 
 
            _fullPathToAddIn = fullPathToAddin;
            _assemblyName = assemblyName; 

            _unlocalized = new ResourceState();
        }
 
        // expose this internally so we can default the name in the case of FindAddIn
        public ResourceState UnlocalizedResourceState 
        { 
            get { return _unlocalized; }
        } 

        public String AddInName {
            get {
#if LOCALIZABLE_ADDIN_ATTRIBUTE 
                ResourceState resState = GetLocalizedResources();
                if (resState.Name == null) 
                    return _unlocalized.Name; 
                else
                    return resState.Name; 
#else
                return _unlocalized.Name;
#endif
            } 
        }
 
        public String Publisher { 
            get {
#if LOCALIZABLE_ADDIN_ATTRIBUTE 
                ResourceState resState = GetLocalizedResources();
                if (resState.Publisher == null)
                    return _unlocalized.Publisher;
                else 
                    return resState.Publisher;
#else 
                return _unlocalized.Publisher; 
#endif
            } 
        }

        public String Description {
            get { 
#if LOCALIZABLE_ADDIN_ATTRIBUTE
                ResourceState resState = GetLocalizedResources(); 
                if (resState.Description == null) 
                    return _unlocalized.Description;
                else 
                    return resState.Description;
#else
                return _unlocalized.Description;
#endif 
            }
        } 
 
        public AssemblyName AssemblyName {
            get { 
                return new AssemblyName(_assemblyName);
            }
        }
 

#if LOCALIZABLE_ADDIN_ATTRIBUTE 
        internal ResourceState GetLocalizedResources() 
        {
            if (!ContainsLocalizableStrings) 
                return _unlocalized;
            ResourceState resState = _localizedResources;
            if (Thread.CurrentThread.CurrentUICulture.Name == resState.CultureName)
                return resState; 
            // Cache this set of resources, in case someone asks for another from
            // the same culture. 
            _localizedResources = ResourceProvider.LookupResourcesInNewDomain(Location, 
                _resMgrBaseName, _nameResource, _publisherResource, _descriptionResource);
            return _localizedResources; 
        }

        internal bool ContainsLocalizableStrings {
            get { 
                return _resMgrBaseName != null &&
                    (_nameResource != null || _publisherResource != null || _descriptionResource != null); 
            } 
        }
#endif // LOCALIZABLE_ADDIN_ATTRIBUTE 

        public String Version {
            get { return _version; }
        } 

        internal TypeInfo[] AddInBaseTypeInfo { 
            get { return _potentialAddinBases; } 
        }
 
        public override string ToString()
        {
            return String.Format(CultureInfo.CurrentCulture, Res.AddInToString, Name, BestAvailableLocation);
        } 

        //Validate the addin. Also fill in the base class and interfaces. 
        internal override bool Validate(TypeInfo type, Collection warnings) 
        {
            Type addInAttributeType = typeof(AddInAttribute); 
            // Get the AddInAttribute, if available.  It is not required in the FindAddIn case.
            MiniCustomAttributeInfo[] attributes = type.GetCustomAttributeInfos(addInAttributeType);
            if (attributes.Length > 0)
            { 
                MiniCustomAttributeInfo addInAttribute = attributes[0];
 
                _unlocalized.Name = (String)addInAttribute.FixedArgs[0].Value; 
                foreach (MiniCustomAttributeNamedArgInfo namedArg in addInAttribute.NamedArgs)
                { 
                    switch (namedArg.Name)
                    {
                        case "Description":
                            _unlocalized.Description = (String)namedArg.Value; 
                        break;
                        case "Version": 
                            _version = (String)namedArg.Value; 
                        break;
                        case "Publisher": 
                            _unlocalized.Publisher = (String)namedArg.Value;
                        break;
                        default:
                            warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.UnknownNamedAddInAttributeParameter, namedArg.Name, type.FullName, type.Assembly.ModuleName)); 
                        break;
                    } 
                } 
            }
 
            if (String.IsNullOrEmpty(_unlocalized.Name))
            {
                warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.AddInMustSpecifyName, type.FullName, type.Assembly.ModuleName));
                return false; 
            }
 
            /* 
            // Parse and validate the custom attribute on this type.
            foreach (CustomAttributeData attr in CustomAttributeData.GetCustomAttributes(type)) { 
                if (attr.Constructor.DeclaringType == PipelineComponent.AddInAttributeInReflectionLoaderContext) {
                    if (attr.ConstructorArguments.Count == 1) {
                        _unlocalized.Name = (String)attr.ConstructorArguments[0].Value;
                        if (String.IsNullOrEmpty(_unlocalized.Name)) { 
                            warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.AddInMustSpecifyName, type.FullName, type.Assembly.Location));
                            return false; 
                        } 
                    }
#if LOCALIZABLE_ADDIN_ATTRIBUTE 
                    else if (attr.ConstructorArguments.Count == 2) {
                        _resMgrBaseName = (String)attr.ConstructorArguments[0].Value;
                        _nameResource = (String)attr.ConstructorArguments[1].Value;
                        if (String.IsNullOrEmpty(_resMgrBaseName)) { 
                            warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.MustSpecifyResMgrBaseName, type.FullName, type.Assembly.Location));
                            return false; 
                        } 
                        if (String.IsNullOrEmpty(_nameResource)) {
                            warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.MustSpecifyResourceName, type.FullName, type.Assembly.Location)); 
                            return false;
                        }
                    }
#endif  // LOCALIZABLE_ADDIN_ATTRIBUTE 
                    else {
                        System.Diagnostics.Contracts.Contract.Assert(false, "Unknown number of custom attribute constructor parameters"); 
                    } 
                    foreach (CustomAttributeNamedArgument arg in attr.NamedArguments) {
                        if (arg.MemberInfo.Name == "Publisher") 
                            _unlocalized.Publisher = (String)arg.TypedValue.Value;
                        else if (arg.MemberInfo.Name == "Version")
                            _version = (String)arg.TypedValue.Value;
                        else if (arg.MemberInfo.Name == "Description") 
                            _unlocalized.Description = (String)arg.TypedValue.Value;
#if LOCALIZABLE_ADDIN_ATTRIBUTE 
                        else if (arg.MemberInfo.Name == "PublisherResourceName") 
                            _publisherResource = (String)arg.TypedValue.Value;
                        else if (arg.MemberInfo.Name == "DescriptionResourceName") 
                            _descriptionResource = (String)arg.TypedValue.Value;
#endif
                        else {
                            System.Diagnostics.Contracts.Contract.Assert(false, "Unknown named parameter to AddInAttribute: " + arg.MemberInfo.Name); 
                            warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.UnknownNamedAddInAttributeParameter, arg.MemberInfo.Name, type.FullName, type.Assembly.Location));
                            // Let's ignore this - this shouldn't be fatal. 
                        } 
                    }
                    break; 
                }
            }
            */
 
            // Check for a public default constructor
            bool found = false; 
            foreach (MiniConstructorInfo ci in type.GetConstructors()) { 
                MiniParameterInfo[] pars = ci.GetParameters();
                if (pars.Length == 0) { 
                    found = true;
                    break;
                }
            } 

            if (!found) 
            { 
                warnings.Add(String.Format(CultureInfo.CurrentCulture, Res.NoDefaultConstructor, type.FullName, type.Assembly.ModuleName));
                return false; 
            }

            _potentialAddinBases = FindBaseTypesAndInterfaces(type);
 
            if(_potentialAddinBases.Length == 0)
            { 
                return false; 
            }
 

#if LOCALIZABLE_ADDIN_ATTRIBUTE
            if (ContainsLocalizableStrings) {
                _localizedResources = ResourceProvider.LookupResourcesInCurrentDomain(_fullPathToAddIn, 
                    _resMgrBaseName, _nameResource, _publisherResource, _descriptionResource);
            } 
#endif 
            return base.Validate(type, warnings);
        } 
    }
}


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