Code:
/ 4.0 / 4.0 / untmp / 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, ICollectionuriRegistry) { _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) { ReadOnlyCollectioncsdlChildren = 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 ListGetOriginalPaths(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 ListGetPaths(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 ListGetPaths() { 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 ListGetReaders(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 ListCreateReaders(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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