MetadataArtifactLoaderCompositeFile.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Metadata / MetadataArtifactLoaderCompositeFile.cs / 1305376 / MetadataArtifactLoaderCompositeFile.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System.Collections.Generic; 
using System.Collections;
using System.Diagnostics;
using System.Globalization;
using System.Reflection; 
using System.Text;
using System.Xml; 
using System.Data.Mapping; 
using System.IO;
using System.Security; 
using System.Security.Permissions;
using System.Threading;
using System.Collections.ObjectModel;
using System.Runtime.Versioning; 

 
namespace System.Data.Metadata.Edm 
{
    ///  
    /// This class represents a collection of artifact files to be loaded from one
    /// filesystem folder.
    /// 
    internal class MetadataArtifactLoaderCompositeFile : MetadataArtifactLoader 
    {
        private ReadOnlyCollection _csdlChildren; 
        private ReadOnlyCollection _ssdlChildren; 
        private ReadOnlyCollection _mslChildren;
 

        private readonly string _path;
        private readonly ICollection _uriRegistry;
 
        /// 
        /// Constructor - loads all resources into the _children collection 
        ///  
        /// The path to the (collection of) resources
        /// The global registry of URIs 
        [ResourceExposure(ResourceScope.Machine)] //Exposes the file path which is a Machine resource
        public MetadataArtifactLoaderCompositeFile(string path, ICollection uriRegistry)
        {
            _path = path; 
            _uriRegistry = uriRegistry;
        } 
 
        public override string Path
        { 
            get { return _path; }
        }

        [ResourceExposure(ResourceScope.Machine)] //Exposes the file paths which are a Machine resource 
        public override void CollectFilePermissionPaths(List paths, DataSpace spaceToGet)
        { 
           IList files; 
            if(TryGetListForSpace(spaceToGet, out files))
            { 
                foreach(var loader in files)
                {
                    loader.CollectFilePermissionPaths(paths, spaceToGet);
                } 
            }
        } 
 
        public override bool IsComposite
        { 
            get
            {
                return true;
            } 
        }
 
        internal ReadOnlyCollection CsdlChildren 
        {
            get 
            {
                LoadCollections();
                return _csdlChildren;
            } 
        }
        internal ReadOnlyCollection SsdlChildren 
        { 
            get
            { 
                LoadCollections();
                return _ssdlChildren;
            }
        } 
        internal ReadOnlyCollection MslChildren
        { 
            get 
            {
                LoadCollections(); 
                return _mslChildren;
            }
        }
 
        /// 
        /// Load all the collections at once so we have a "fairly" matched in time set of files 
        /// otherwise we may end up loading the csdl files, and then not loading the ssdl, and msl 
        /// files for sometime later.
        ///  
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] //For GetArtifactsInDirectory method call. We pick the paths from class variable.
                                                                            //so this method does not expose any resource.
        void LoadCollections() 
        {
            if (_csdlChildren == null) 
            { 
                ReadOnlyCollection csdlChildren = GetArtifactsInDirectory(_path, XmlConstants.CSpaceSchemaExtension, _uriRegistry).AsReadOnly();
                Interlocked.CompareExchange(ref _csdlChildren, csdlChildren, null); 
            }
            if (_ssdlChildren == null)
            {
                ReadOnlyCollection ssdlChildren = GetArtifactsInDirectory(_path, XmlConstants.SSpaceSchemaExtension, _uriRegistry).AsReadOnly(); 
                Interlocked.CompareExchange(ref _ssdlChildren, ssdlChildren, null);
            } 
            if (_mslChildren == null) 
            {
                ReadOnlyCollection mslChildren = GetArtifactsInDirectory(_path, XmlConstants.CSSpaceSchemaExtension, _uriRegistry).AsReadOnly(); 
                Interlocked.CompareExchange(ref _mslChildren, mslChildren, null);
            }
        }
 
        /// 
        /// Get paths to artifacts for a specific DataSpace, in the original, unexpanded 
        /// form. 
        /// 
        /// A filesystem folder can contain any kind of artifact, so we simply 
        /// ignore the parameter and return the original path to the folder.
        /// The DataSpace for the artifacts of interest
        /// A List of strings identifying paths to all artifacts for a specific DataSpace
        public override List GetOriginalPaths(DataSpace spaceToGet) 
        {
            return GetOriginalPaths(); 
        } 

        ///  
        /// Get paths to artifacts for a specific DataSpace.
        /// 
        /// The DataSpace for the artifacts of interest
        /// A List of strings identifying paths to all artifacts for a specific DataSpace 
        public override List GetPaths(DataSpace spaceToGet)
        { 
            List list = new List(); 
            IList files;
 
            if (!TryGetListForSpace(spaceToGet, out files))
            {
                return list;
            } 

            foreach (MetadataArtifactLoaderFile file in files) 
            { 
                list.AddRange(file.GetPaths(spaceToGet));
            } 

            return list;
        }
 
        private bool TryGetListForSpace(DataSpace spaceToGet, out IList files)
        { 
            switch (spaceToGet) 
            {
                case DataSpace.CSpace: 
                    files = CsdlChildren;
                    return true;
                case DataSpace.SSpace:
                    files = SsdlChildren; 
                    return true;
                case DataSpace.CSSpace: 
                    files = MslChildren; 
                    return true;
                default: 
                    Debug.Assert(false, "Invalid DataSpace value.");
                    files = null;
                    return false;
            } 
        }
 
        ///  
        /// Get paths to all artifacts
        ///  
        /// A List of strings identifying paths to all resources
        public override List GetPaths()
        {
            List list = new List(); 

            foreach (MetadataArtifactLoaderFile resource in CsdlChildren) 
            { 
                list.AddRange(resource.GetPaths());
            } 
            foreach (MetadataArtifactLoaderFile resource in SsdlChildren)
            {
                list.AddRange(resource.GetPaths());
            } 
            foreach (MetadataArtifactLoaderFile resource in MslChildren)
            { 
                list.AddRange(resource.GetPaths()); 
            }
 
            return list;
        }

        ///  
        /// Aggregates all resource streams from the _children collection
        ///  
        /// A List of XmlReader objects; cannot be null 
        public override List GetReaders(Dictionary sourceDictionary)
        { 
            List list = new List();

            foreach (MetadataArtifactLoaderFile resource in CsdlChildren)
            { 
                list.AddRange(resource.GetReaders(sourceDictionary));
            } 
            foreach (MetadataArtifactLoaderFile resource in SsdlChildren) 
            {
                list.AddRange(resource.GetReaders(sourceDictionary)); 
            }
            foreach (MetadataArtifactLoaderFile resource in MslChildren)
            {
                list.AddRange(resource.GetReaders(sourceDictionary)); 
            }
 
            return list; 
        }
 
        /// 
        /// Get XmlReaders for a specific DataSpace.
        /// 
        /// The DataSpace corresponding to the requested artifacts 
        /// A List of XmlReader objects
        public override List CreateReaders(DataSpace spaceToGet) 
        { 
            List list = new List();
            IList files; 

            if (!TryGetListForSpace(spaceToGet, out files))
            {
                return list; 
            }
 
            foreach (MetadataArtifactLoaderFile file in files) 
            {
                list.AddRange(file.CreateReaders(spaceToGet)); 
            }

            return list;
        } 

        [ResourceExposure(ResourceScope.Machine)] //Exposes the directory name which is a Machine resource 
        [ResourceConsumption(ResourceScope.Machine)] //For Directory.GetFiles method call but we do not create the directory name in this method 
        private static List GetArtifactsInDirectory(string directory, string extension, ICollection uriRegistry)
        { 
            List loaders = new List();

            string[] fileNames = Directory.GetFiles(
                                            directory, 
                                            MetadataArtifactLoader.wildcard + extension,
                                            SearchOption.TopDirectoryOnly 
                                        ); 

 
            foreach (string fileName in fileNames)
            {
                string fullPath = System.IO.Path.Combine(directory, fileName);
 
                if (uriRegistry.Contains(fullPath))
                    continue; 
 
                // We need a second filter on the file names verifying the right extension because
                // a file name with an extension longer than 3 characters might still match the 
                // given extension. For example, if we look for *.msl, abc.msl_something would match
                // because the 8.3 name format matches it.
                if (fileName.EndsWith(extension, StringComparison.OrdinalIgnoreCase))
                { 
                    loaders.Add(new MetadataArtifactLoaderFile(fullPath, uriRegistry));
                    // the file is added to the registry in the MetadataArtifactLoaderFile ctor 
                } 
            }
 
            return loaders;
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System.Collections.Generic; 
using System.Collections;
using System.Diagnostics;
using System.Globalization;
using System.Reflection; 
using System.Text;
using System.Xml; 
using System.Data.Mapping; 
using System.IO;
using System.Security; 
using System.Security.Permissions;
using System.Threading;
using System.Collections.ObjectModel;
using System.Runtime.Versioning; 

 
namespace System.Data.Metadata.Edm 
{
    ///  
    /// This class represents a collection of artifact files to be loaded from one
    /// filesystem folder.
    /// 
    internal class MetadataArtifactLoaderCompositeFile : MetadataArtifactLoader 
    {
        private ReadOnlyCollection _csdlChildren; 
        private ReadOnlyCollection _ssdlChildren; 
        private ReadOnlyCollection _mslChildren;
 

        private readonly string _path;
        private readonly ICollection _uriRegistry;
 
        /// 
        /// Constructor - loads all resources into the _children collection 
        ///  
        /// The path to the (collection of) resources
        /// The global registry of URIs 
        [ResourceExposure(ResourceScope.Machine)] //Exposes the file path which is a Machine resource
        public MetadataArtifactLoaderCompositeFile(string path, ICollection uriRegistry)
        {
            _path = path; 
            _uriRegistry = uriRegistry;
        } 
 
        public override string Path
        { 
            get { return _path; }
        }

        [ResourceExposure(ResourceScope.Machine)] //Exposes the file paths which are a Machine resource 
        public override void CollectFilePermissionPaths(List paths, DataSpace spaceToGet)
        { 
           IList files; 
            if(TryGetListForSpace(spaceToGet, out files))
            { 
                foreach(var loader in files)
                {
                    loader.CollectFilePermissionPaths(paths, spaceToGet);
                } 
            }
        } 
 
        public override bool IsComposite
        { 
            get
            {
                return true;
            } 
        }
 
        internal ReadOnlyCollection CsdlChildren 
        {
            get 
            {
                LoadCollections();
                return _csdlChildren;
            } 
        }
        internal ReadOnlyCollection SsdlChildren 
        { 
            get
            { 
                LoadCollections();
                return _ssdlChildren;
            }
        } 
        internal ReadOnlyCollection MslChildren
        { 
            get 
            {
                LoadCollections(); 
                return _mslChildren;
            }
        }
 
        /// 
        /// Load all the collections at once so we have a "fairly" matched in time set of files 
        /// otherwise we may end up loading the csdl files, and then not loading the ssdl, and msl 
        /// files for sometime later.
        ///  
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] //For GetArtifactsInDirectory method call. We pick the paths from class variable.
                                                                            //so this method does not expose any resource.
        void LoadCollections() 
        {
            if (_csdlChildren == null) 
            { 
                ReadOnlyCollection csdlChildren = GetArtifactsInDirectory(_path, XmlConstants.CSpaceSchemaExtension, _uriRegistry).AsReadOnly();
                Interlocked.CompareExchange(ref _csdlChildren, csdlChildren, null); 
            }
            if (_ssdlChildren == null)
            {
                ReadOnlyCollection ssdlChildren = GetArtifactsInDirectory(_path, XmlConstants.SSpaceSchemaExtension, _uriRegistry).AsReadOnly(); 
                Interlocked.CompareExchange(ref _ssdlChildren, ssdlChildren, null);
            } 
            if (_mslChildren == null) 
            {
                ReadOnlyCollection mslChildren = GetArtifactsInDirectory(_path, XmlConstants.CSSpaceSchemaExtension, _uriRegistry).AsReadOnly(); 
                Interlocked.CompareExchange(ref _mslChildren, mslChildren, null);
            }
        }
 
        /// 
        /// Get paths to artifacts for a specific DataSpace, in the original, unexpanded 
        /// form. 
        /// 
        /// A filesystem folder can contain any kind of artifact, so we simply 
        /// ignore the parameter and return the original path to the folder.
        /// The DataSpace for the artifacts of interest
        /// A List of strings identifying paths to all artifacts for a specific DataSpace
        public override List GetOriginalPaths(DataSpace spaceToGet) 
        {
            return GetOriginalPaths(); 
        } 

        ///  
        /// Get paths to artifacts for a specific DataSpace.
        /// 
        /// The DataSpace for the artifacts of interest
        /// A List of strings identifying paths to all artifacts for a specific DataSpace 
        public override List GetPaths(DataSpace spaceToGet)
        { 
            List list = new List(); 
            IList files;
 
            if (!TryGetListForSpace(spaceToGet, out files))
            {
                return list;
            } 

            foreach (MetadataArtifactLoaderFile file in files) 
            { 
                list.AddRange(file.GetPaths(spaceToGet));
            } 

            return list;
        }
 
        private bool TryGetListForSpace(DataSpace spaceToGet, out IList files)
        { 
            switch (spaceToGet) 
            {
                case DataSpace.CSpace: 
                    files = CsdlChildren;
                    return true;
                case DataSpace.SSpace:
                    files = SsdlChildren; 
                    return true;
                case DataSpace.CSSpace: 
                    files = MslChildren; 
                    return true;
                default: 
                    Debug.Assert(false, "Invalid DataSpace value.");
                    files = null;
                    return false;
            } 
        }
 
        ///  
        /// Get paths to all artifacts
        ///  
        /// A List of strings identifying paths to all resources
        public override List GetPaths()
        {
            List list = new List(); 

            foreach (MetadataArtifactLoaderFile resource in CsdlChildren) 
            { 
                list.AddRange(resource.GetPaths());
            } 
            foreach (MetadataArtifactLoaderFile resource in SsdlChildren)
            {
                list.AddRange(resource.GetPaths());
            } 
            foreach (MetadataArtifactLoaderFile resource in MslChildren)
            { 
                list.AddRange(resource.GetPaths()); 
            }
 
            return list;
        }

        ///  
        /// Aggregates all resource streams from the _children collection
        ///  
        /// A List of XmlReader objects; cannot be null 
        public override List GetReaders(Dictionary sourceDictionary)
        { 
            List list = new List();

            foreach (MetadataArtifactLoaderFile resource in CsdlChildren)
            { 
                list.AddRange(resource.GetReaders(sourceDictionary));
            } 
            foreach (MetadataArtifactLoaderFile resource in SsdlChildren) 
            {
                list.AddRange(resource.GetReaders(sourceDictionary)); 
            }
            foreach (MetadataArtifactLoaderFile resource in MslChildren)
            {
                list.AddRange(resource.GetReaders(sourceDictionary)); 
            }
 
            return list; 
        }
 
        /// 
        /// Get XmlReaders for a specific DataSpace.
        /// 
        /// The DataSpace corresponding to the requested artifacts 
        /// A List of XmlReader objects
        public override List CreateReaders(DataSpace spaceToGet) 
        { 
            List list = new List();
            IList files; 

            if (!TryGetListForSpace(spaceToGet, out files))
            {
                return list; 
            }
 
            foreach (MetadataArtifactLoaderFile file in files) 
            {
                list.AddRange(file.CreateReaders(spaceToGet)); 
            }

            return list;
        } 

        [ResourceExposure(ResourceScope.Machine)] //Exposes the directory name which is a Machine resource 
        [ResourceConsumption(ResourceScope.Machine)] //For Directory.GetFiles method call but we do not create the directory name in this method 
        private static List GetArtifactsInDirectory(string directory, string extension, ICollection uriRegistry)
        { 
            List loaders = new List();

            string[] fileNames = Directory.GetFiles(
                                            directory, 
                                            MetadataArtifactLoader.wildcard + extension,
                                            SearchOption.TopDirectoryOnly 
                                        ); 

 
            foreach (string fileName in fileNames)
            {
                string fullPath = System.IO.Path.Combine(directory, fileName);
 
                if (uriRegistry.Contains(fullPath))
                    continue; 
 
                // We need a second filter on the file names verifying the right extension because
                // a file name with an extension longer than 3 characters might still match the 
                // given extension. For example, if we look for *.msl, abc.msl_something would match
                // because the 8.3 name format matches it.
                if (fileName.EndsWith(extension, StringComparison.OrdinalIgnoreCase))
                { 
                    loaders.Add(new MetadataArtifactLoaderFile(fullPath, uriRegistry));
                    // the file is added to the registry in the MetadataArtifactLoaderFile ctor 
                } 
            }
 
            return loaders;
        }
    }
} 

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

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