PipelineComponent.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 / PipelineComponent.cs / 1305376 / PipelineComponent.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class:  PipelineComponent 
**
** Purpose: Base class representing parts of the add-in 
**     pipeline, from the host to the contract to the addin.
**
===========================================================*/
using System; 
using System.Collections.Generic;
using System.Collections.ObjectModel; 
using System.IO; 
using System.Reflection;
using System.Security; 
using System.Security.Permissions;
using System.Text;
using System.Diagnostics;
using System.AddIn.MiniReflection; 
using System.AddIn.Pipeline;
 
using System.Diagnostics.Contracts; 

namespace System.AddIn 
{
    [Serializable]
    internal enum PipelineComponentType
    { 
        HostAdapter,
        Contract, 
        AddInAdapter, 
        AddInBase,
        AddIn 
    }

    [Serializable]
    internal abstract class PipelineComponent 
    {
        private TypeInfo _typeInfo; 
        private String _location;         // fully qualified path, known after deserialization 
        private String _relativeLocation; // relative to the add-in root or pipeline root.
        private bool _connectedToNeighbors; 
        private bool _haveSetRootDirectory; // Whether the add-in root or pipeline root has been set.

        // Since these dictionaries are read-only after initialization and they are often empty,
        // a perf optimization is to have the empty ones be shared. 
        private IDictionary _qualificationData;
 
        internal static readonly IDictionary s_emptyDictionary = 
            new ReadOnlyDictionary(new Dictionary());
 
        private static Type s_IContractInReflectionLoaderContext;
        private static Type s_ContractAttrInReflectionLoaderContext;
        private static Type s_AddInAdapterAttrInReflectionLoaderContext;
        private static Type s_AddInBaseAttrInReflectionLoaderContext; 
        private static Type s_AddInAttrInReflectionLoaderContext;
        private static Type s_QualificationDataAttrInReflectionLoaderContext; 
 

        internal PipelineComponent(TypeInfo typeInfo, String assemblyLocation) 
        {
            if (typeInfo == null)
                throw new ArgumentNullException("typeInfo");
            if (assemblyLocation == null) 
                throw new ArgumentNullException("assemblyLocation");
            System.Diagnostics.Contracts.Contract.EndContractBlock(); 
 
            _typeInfo = typeInfo;
            if (Path.IsPathRooted(assemblyLocation)) { 
                // For FindAddIn case, we know the full location;
                _location = assemblyLocation;
                _haveSetRootDirectory = true;
            } 
            else {
                _relativeLocation = assemblyLocation; 
            } 

            // load the qualification data, either from reflection or minireflection, as appropriate 
            if (_typeInfo.HasReflectionType)
            {
                IList cas =CustomAttributeData.GetCustomAttributes(_typeInfo.ReflectionType);
                Dictionary dictionary = new Dictionary(); 
                foreach (CustomAttributeData ca in cas)
                { 
                    if (Object.ReferenceEquals(ca.Constructor.DeclaringType, s_QualificationDataAttrInReflectionLoaderContext)) 
                    {
                        IList args = ca.ConstructorArguments; 
                        String key = (String)args[0].Value;
                        String val = (String)args[1].Value;
                        dictionary[key] = val;
                    } 
                }
                _qualificationData = dictionary.Count == 0 ? s_emptyDictionary : 
                    new ReadOnlyDictionary(dictionary); 
            }
            else 
            {
                Type qualificationDataAttribute = typeof (QualificationDataAttribute);
                MiniCustomAttributeInfo[] cas = typeInfo.GetCustomAttributeInfos(qualificationDataAttribute);
                Dictionary dictionary = new Dictionary(); 
                if (cas != null && cas.Length > 0)
                { 
                    foreach (MiniCustomAttributeInfo ca in cas) 
                    {
                        MiniCustomAttributeFixedArgInfo[] fai = ca.FixedArgs; 
                        String key = (String)fai[0].Value;
                        String val = (String)fai[1].Value;
                        dictionary[key] = val;
                    } 
                }
                _qualificationData = dictionary.Count == 0 ? s_emptyDictionary : 
                    new ReadOnlyDictionary(dictionary); 
            }
        } 

        internal IDictionary QualificationData
        {
            get { return _qualificationData; } 
        }
 
        protected static Type IContractInReflectionLoaderContext { 
            get {
                System.Diagnostics.Contracts.Contract.Assert(s_IContractInReflectionLoaderContext != null); 
                return s_IContractInReflectionLoaderContext;
            }
        }
 
        internal static Type ContractAttributeInReflectionLoaderContext {
            get { 
                System.Diagnostics.Contracts.Contract.Assert(s_ContractAttrInReflectionLoaderContext != null); 
                return s_ContractAttrInReflectionLoaderContext;
            } 
        }

        internal static Type AddInAdapterAttributeInReflectionLoaderContext {
            get { 
                System.Diagnostics.Contracts.Contract.Assert(s_AddInAdapterAttrInReflectionLoaderContext != null);
                return s_AddInAdapterAttrInReflectionLoaderContext; 
            } 
        }
 
        internal static Type AddInBaseAttributeInReflectionLoaderContext {
            get {
                System.Diagnostics.Contracts.Contract.Assert(s_AddInBaseAttrInReflectionLoaderContext != null);
                return s_AddInBaseAttrInReflectionLoaderContext; 
            }
        } 
 
        internal static Type AddInAttributeInReflectionLoaderContext {
            get { 
                System.Diagnostics.Contracts.Contract.Assert(s_AddInAttrInReflectionLoaderContext != null);
                return s_AddInAttrInReflectionLoaderContext;
            }
        } 

        internal static void SetTypesFromReflectionLoaderContext(System.Reflection.Assembly systemAddInInReflLoaderContext, 
                                                                 System.Reflection.Assembly systemAddInContractsInReflLoaderContext) 
        {
            System.Diagnostics.Contracts.Contract.Requires(systemAddInInReflLoaderContext != null); 
            System.Diagnostics.Contracts.Contract.Requires(systemAddInInReflLoaderContext.ReflectionOnly);
            System.Diagnostics.Contracts.Contract.Requires(systemAddInContractsInReflLoaderContext != null);
            System.Diagnostics.Contracts.Contract.Requires(systemAddInContractsInReflLoaderContext.ReflectionOnly);
 
            s_IContractInReflectionLoaderContext = systemAddInContractsInReflLoaderContext.GetType(typeof(System.AddIn.Contract.IContract).FullName, true);
            s_ContractAttrInReflectionLoaderContext =systemAddInContractsInReflLoaderContext.GetType("System.AddIn.Pipeline.AddInContractAttribute", true); 
            s_QualificationDataAttrInReflectionLoaderContext = systemAddInContractsInReflLoaderContext.GetType("System.AddIn.Pipeline.QualificationDataAttribute", true); 
            s_AddInAdapterAttrInReflectionLoaderContext = systemAddInInReflLoaderContext.GetType("System.AddIn.Pipeline.AddInAdapterAttribute", true);
            s_AddInBaseAttrInReflectionLoaderContext = systemAddInInReflLoaderContext.GetType("System.AddIn.Pipeline.AddInBaseAttribute", true); 
            s_AddInAttrInReflectionLoaderContext = systemAddInInReflLoaderContext.GetType("System.AddIn.AddInAttribute", true);
        }

        internal void SetRootDirectory(String root) 
        {
            System.Diagnostics.Contracts.Contract.Requires(Path.IsPathRooted(root)); 
            // Note that the same pipeline component may show up in multiple pipelines, 
            // and we can't do this operation twice.
            if (!_haveSetRootDirectory) { 
                System.Diagnostics.Contracts.Contract.Assert(!Path.IsPathRooted(_relativeLocation));

                _location = Path.Combine(root, _relativeLocation);
                _haveSetRootDirectory = true; 
            }
        } 
 
        public String Location {
            get { 
                System.Diagnostics.Contracts.Contract.Assert(_haveSetRootDirectory, "You must set this component's root directory before getting an absolute path.  Either call SetRootDirectory or use RelativeLocation instead.");
                return _location;
            }
        } 

        internal String RelativeLocation { 
            get { 
                return _relativeLocation;
            } 
        }

        protected String BestAvailableLocation {
            get { 
                System.Diagnostics.Contracts.Contract.Ensures(System.Diagnostics.Contracts.Contract.Result() != null);
                if (_haveSetRootDirectory) 
                    return _location; 
                return _relativeLocation;
            } 
        }

        public String Name {
            get { 
                System.Diagnostics.Contracts.Contract.Ensures(System.Diagnostics.Contracts.Contract.Result() != null);
                return _typeInfo.Name; 
            } 
        }
 
        public TypeInfo TypeInfo {
            get { return _typeInfo; }
        }
 
        public String FullName {
            get { 
                return _typeInfo.FullName; 
            }
        } 

        public bool ConnectedToNeighbors {
            get { return _connectedToNeighbors; }
            set { _connectedToNeighbors = value; } 
        }
 
        // @ 

 



 
        internal virtual bool Validate(Type type, Collection warnings)
        { 
            return Validate(new TypeInfo(type), warnings); 
        }
 
        // Finish the initialization, and ensure this type is a valid component
        // for use in the add-in model.  On failure, log a message & return false.
        // Derived classes should do their own validation and then call this one.
        internal virtual bool Validate(TypeInfo type, Collection warnings) 
        {
            if (type.IsGeneric) 
            { 
                warnings.Add(String.Format(System.Globalization.CultureInfo.CurrentCulture, Res.ComponentUnusableBecauseItIsGeneric, type.Name));
                return false; 
            }
            return true;
        }
 
        // used in AddIn class and HostAdapter class
        // Since MiniReflection doesn't support generics, we do a "best effort" while generating this list. 
        [System.Security.SecuritySafeCritical] 
        internal static TypeInfo[] FindBaseTypesAndInterfaces(TypeInfo type)
        { 
            TypeInfo currentTypeInfo = type;
            TypeInfo objectType = new TypeInfo(typeof(Object));
            List infos = new List();
 
            try
            { 
                //we walk up the hierarchy as far as we can until we can't 
                //get the types anymore...
                while (!currentTypeInfo.Equals(objectType)) 
                {
                    // To get the base type and interfaces, we will need to resolve a TypeRef to a TypeDef first
                    currentTypeInfo = currentTypeInfo.TryGetTypeDef();
                    if (currentTypeInfo != null) 
                    {
                        TypeInfo[] interfaces = currentTypeInfo.GetInterfaces(); 
                        if (interfaces != null) 
                            infos.AddRange(interfaces);
 
                        TypeInfo baseType = currentTypeInfo.BaseType;
                        infos.Add(baseType);
                        currentTypeInfo = baseType;
                    } 
                    else
                    { 
                        // we have reached the limit of what we can resolve in the addin/hostadapter's folder 
                        break;
                    } 
                }
            }
            catch (GenericsNotImplementedException)
            { 
                // Since GetInterfaces() ignores all generic interfaces, we'll only come here if we encounter a generic base class.
                // We'll ignore the generic base class and return whatever bases we found earlier. 
            } 

            return infos.ToArray(); 
        }

    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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PipelineComponent.cs source code in C# .NET

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