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429 lines
19 KiB
C#
429 lines
19 KiB
C#
//---------------------------------------------------------------------
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// <copyright file="StoreItemCollection.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//
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// @owner Microsoft
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// @backupOwner Microsoft
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//---------------------------------------------------------------------
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namespace System.Data.Metadata.Edm
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{
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using System.Collections.Generic;
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using System.Data.Common;
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using System.Data.Common.Utils;
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using System.Data.Entity;
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using System.Diagnostics;
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using System.Linq;
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using System.Runtime.Versioning;
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using System.Xml;
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/// <summary>
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/// Class for representing a collection of items in Store space.
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/// </summary>
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[CLSCompliant(false)]
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public sealed partial class StoreItemCollection : ItemCollection
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{
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#region Fields
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double _schemaVersion = XmlConstants.UndefinedVersion;
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// Cache for primitive type maps for Edm to provider
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private readonly CacheForPrimitiveTypes _primitiveTypeMaps = new CacheForPrimitiveTypes();
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private readonly Memoizer<EdmFunction, EdmFunction> _cachedCTypeFunction;
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private readonly DbProviderManifest _providerManifest;
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private readonly string _providerManifestToken;
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private readonly DbProviderFactory _providerFactory;
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// Storing the query cache manager in the store item collection since all queries are currently bound to the
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// store. So storing it in StoreItemCollection makes sense. Also, since query cache requires version and other
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// stuff of the provider, we can assume that the connection is always open and we have the store metadata.
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// Also we can use the same cache manager both for Entity Client and Object Query, since query cache has
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// no reference to any metadata in OSpace. Also we assume that ObjectMaterializer loads the assembly
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// before it tries to do object materialization, since we might not have loaded an assembly in another workspace
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// where this store item collection is getting reused
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private readonly System.Data.Common.QueryCache.QueryCacheManager _queryCacheManager = System.Data.Common.QueryCache.QueryCacheManager.Create();
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#endregion
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#region Constructors
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// used by EntityStoreSchemaGenerator to start with an empty (primitive types only) StoreItemCollection and
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// add types discovered from the database
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internal StoreItemCollection(DbProviderFactory factory, DbProviderManifest manifest, string providerManifestToken)
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: base(DataSpace.SSpace)
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{
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Debug.Assert(factory != null, "factory is null");
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Debug.Assert(manifest != null, "manifest is null");
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_providerFactory = factory;
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_providerManifest = manifest;
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_providerManifestToken = providerManifestToken;
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_cachedCTypeFunction = new Memoizer<EdmFunction, EdmFunction>(ConvertFunctionSignatureToCType, null);
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LoadProviderManifest(_providerManifest, true /*checkForSystemNamespace*/);
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}
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/// <summary>
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/// constructor that loads the metadata files from the specified xmlReaders, and returns the list of errors
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/// encountered during load as the out parameter errors.
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///
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/// Publicly available from System.Data.Entity.Desgin.dll
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/// </summary>
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/// <param name="xmlReaders">xmlReaders where the CDM schemas are loaded</param>
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/// <param name="filePaths">the paths where the files can be found that match the xml readers collection</param>
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/// <param name="errors">An out parameter to return the collection of errors encountered while loading</param>
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[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")] // referenced by System.Data.Entity.Design.dll
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internal StoreItemCollection(IEnumerable<XmlReader> xmlReaders,
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System.Collections.ObjectModel.ReadOnlyCollection<string> filePaths,
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out IList<EdmSchemaError> errors)
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: base(DataSpace.SSpace)
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{
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// we will check the parameters for this internal ctor becuase
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// it is pretty much publicly exposed through the MetadataItemCollectionFactory
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// in System.Data.Entity.Design
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EntityUtil.CheckArgumentNull(xmlReaders, "xmlReaders");
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EntityUtil.CheckArgumentContainsNull(ref xmlReaders, "xmlReaders");
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EntityUtil.CheckArgumentEmpty(ref xmlReaders, Strings.StoreItemCollectionMustHaveOneArtifact, "xmlReader");
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// filePaths is allowed to be null
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errors = this.Init(xmlReaders, filePaths, false,
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out _providerManifest,
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out _providerFactory,
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out _providerManifestToken,
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out _cachedCTypeFunction);
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}
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/// <summary>
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/// constructor that loads the metadata files from the specified xmlReaders, and returns the list of errors
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/// encountered during load as the out parameter errors.
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///
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/// Publicly available from System.Data.Entity.Desgin.dll
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/// </summary>
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/// <param name="xmlReaders">xmlReaders where the CDM schemas are loaded</param>
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/// <param name="filePaths">the paths where the files can be found that match the xml readers collection</param>
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internal StoreItemCollection(IEnumerable<XmlReader> xmlReaders,
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IEnumerable<string> filePaths)
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: base(DataSpace.SSpace)
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{
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EntityUtil.CheckArgumentNull(filePaths, "filePaths");
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EntityUtil.CheckArgumentEmpty(ref xmlReaders, Strings.StoreItemCollectionMustHaveOneArtifact, "xmlReader");
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this.Init(xmlReaders, filePaths, true,
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out _providerManifest,
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out _providerFactory,
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out _providerManifestToken,
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out _cachedCTypeFunction);
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}
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/// <summary>
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/// Public constructor that loads the metadata files from the specified xmlReaders.
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/// Throws when encounter errors.
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/// </summary>
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/// <param name="xmlReaders">xmlReaders where the CDM schemas are loaded</param>
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public StoreItemCollection(IEnumerable<XmlReader> xmlReaders)
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: base(DataSpace.SSpace)
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{
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EntityUtil.CheckArgumentNull(xmlReaders, "xmlReaders");
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EntityUtil.CheckArgumentEmpty(ref xmlReaders, Strings.StoreItemCollectionMustHaveOneArtifact, "xmlReader");
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MetadataArtifactLoader composite = MetadataArtifactLoader.CreateCompositeFromXmlReaders(xmlReaders);
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this.Init(composite.GetReaders(),
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composite.GetPaths(), true,
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out _providerManifest,
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out _providerFactory,
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out _providerManifestToken,
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out _cachedCTypeFunction);
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}
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/// <summary>
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/// Constructs the new instance of StoreItemCollection
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/// with the list of CDM files provided.
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/// </summary>
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/// <param name="filePaths">paths where the CDM schemas are loaded</param>
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/// <exception cref="ArgumentException"> Thrown if path name is not valid</exception>
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/// <exception cref="System.ArgumentNullException">thrown if paths argument is null</exception>
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/// <exception cref="System.Data.MetadataException">For errors related to invalid schemas.</exception>
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[ResourceExposure(ResourceScope.Machine)] //Exposes the file path names which are a Machine resource
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[ResourceConsumption(ResourceScope.Machine)] //For MetadataArtifactLoader.CreateCompositeFromFilePaths method call but we do not create the file paths in this method
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public StoreItemCollection(params string[] filePaths)
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: base(DataSpace.SSpace)
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{
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EntityUtil.CheckArgumentNull(filePaths, "filePaths");
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IEnumerable<string> enumerableFilePaths = filePaths;
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EntityUtil.CheckArgumentEmpty(ref enumerableFilePaths, Strings.StoreItemCollectionMustHaveOneArtifact, "filePaths");
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// Wrap the file paths in instances of the MetadataArtifactLoader class, which provides
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// an abstraction and a uniform interface over a diverse set of metadata artifacts.
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//
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MetadataArtifactLoader composite = null;
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List<XmlReader> readers = null;
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try
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{
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composite = MetadataArtifactLoader.CreateCompositeFromFilePaths(enumerableFilePaths, XmlConstants.SSpaceSchemaExtension);
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readers = composite.CreateReaders(DataSpace.SSpace);
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IEnumerable<XmlReader> ieReaders = readers.AsEnumerable();
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EntityUtil.CheckArgumentEmpty(ref ieReaders, Strings.StoreItemCollectionMustHaveOneArtifact, "filePaths");
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this.Init(readers,
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composite.GetPaths(DataSpace.SSpace), true,
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out _providerManifest,
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out _providerFactory,
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out _providerManifestToken,
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out _cachedCTypeFunction);
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}
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finally
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{
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if (readers != null)
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{
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Helper.DisposeXmlReaders(readers);
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}
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}
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}
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private IList<EdmSchemaError> Init(IEnumerable<XmlReader> xmlReaders,
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IEnumerable<string> filePaths, bool throwOnError,
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out DbProviderManifest providerManifest,
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out DbProviderFactory providerFactory,
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out string providerManifestToken,
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out Memoizer<EdmFunction, EdmFunction> cachedCTypeFunction)
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{
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EntityUtil.CheckArgumentNull(xmlReaders, "xmlReaders");
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// 'filePaths' can be null
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cachedCTypeFunction = new Memoizer<EdmFunction, EdmFunction>(ConvertFunctionSignatureToCType, null);
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Loader loader = new Loader(xmlReaders, filePaths, throwOnError);
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providerFactory = loader.ProviderFactory;
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providerManifest = loader.ProviderManifest;
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providerManifestToken = loader.ProviderManifestToken;
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// load the items into the colleciton
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if (!loader.HasNonWarningErrors)
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{
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LoadProviderManifest(loader.ProviderManifest, true /* check for system namespace */);
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List<EdmSchemaError> errorList = EdmItemCollection.LoadItems(_providerManifest, loader.Schemas, this);
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foreach (var error in errorList)
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{
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loader.Errors.Add(error);
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}
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if (throwOnError && errorList.Count != 0)
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loader.ThrowOnNonWarningErrors();
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}
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return loader.Errors;
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}
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#endregion
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#region Properties
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/// <summary>
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/// Returns the query cache manager
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/// </summary>
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internal System.Data.Common.QueryCache.QueryCacheManager QueryCacheManager
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{
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get { return _queryCacheManager; }
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}
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internal DbProviderFactory StoreProviderFactory
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{
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get
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{
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return _providerFactory;
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}
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}
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internal DbProviderManifest StoreProviderManifest
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{
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get
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{
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return _providerManifest;
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}
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}
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internal string StoreProviderManifestToken
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{
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get
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{
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return _providerManifestToken;
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}
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}
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/// <summary>
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/// Version of this StoreItemCollection represents.
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/// </summary>
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public Double StoreSchemaVersion
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{
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get
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{
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return _schemaVersion;
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}
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internal set
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{
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_schemaVersion = value;
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}
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}
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#endregion
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#region Methods
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/// <summary>
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/// Get the list of primitive types for the given space
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/// </summary>
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/// <returns></returns>
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public System.Collections.ObjectModel.ReadOnlyCollection<PrimitiveType> GetPrimitiveTypes()
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{
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return _primitiveTypeMaps.GetTypes();
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}
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/// <summary>
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/// Given the canonical primitive type, get the mapping primitive type in the given dataspace
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/// </summary>
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/// <param name="primitiveTypeKind">canonical primitive type</param>
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/// <returns>The mapped scalar type</returns>
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internal override PrimitiveType GetMappedPrimitiveType(PrimitiveTypeKind primitiveTypeKind)
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{
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PrimitiveType type = null;
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_primitiveTypeMaps.TryGetType(primitiveTypeKind, null, out type);
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return type;
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}
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/// <summary>
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/// checks if the schemaKey refers to the provider manifest schema key
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/// and if true, loads the provider manifest
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/// </summary>
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/// <param name="connection">The connection where the store manifest is loaded from</param>
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/// <param name="checkForSystemNamespace">Check for System namespace</param>
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/// <returns>The provider manifest object that was loaded</returns>
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private void LoadProviderManifest(DbProviderManifest storeManifest,
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bool checkForSystemNamespace)
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{
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foreach (PrimitiveType primitiveType in storeManifest.GetStoreTypes())
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{
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//Add it to the collection and the primitive type maps
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this.AddInternal(primitiveType);
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_primitiveTypeMaps.Add(primitiveType);
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}
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foreach (EdmFunction function in storeManifest.GetStoreFunctions())
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{
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AddInternal(function);
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}
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}
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#endregion
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/// <summary>
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/// Get all the overloads of the function with the given name, this method is used for internal perspective
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/// </summary>
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/// <param name="functionName">The full name of the function</param>
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/// <param name="ignoreCase">true for case-insensitive lookup</param>
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/// <returns>A collection of all the functions with the given name in the given data space</returns>
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/// <exception cref="System.ArgumentNullException">Thrown if functionaName argument passed in is null</exception>
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internal System.Collections.ObjectModel.ReadOnlyCollection<EdmFunction> GetCTypeFunctions(string functionName, bool ignoreCase)
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{
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System.Collections.ObjectModel.ReadOnlyCollection<EdmFunction> functionOverloads;
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if (this.FunctionLookUpTable.TryGetValue(functionName, out functionOverloads))
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{
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functionOverloads = ConvertToCTypeFunctions(functionOverloads);
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if (ignoreCase)
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{
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return functionOverloads;
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}
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return GetCaseSensitiveFunctions(functionOverloads, functionName);
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}
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return Helper.EmptyEdmFunctionReadOnlyCollection;
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}
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private System.Collections.ObjectModel.ReadOnlyCollection<EdmFunction> ConvertToCTypeFunctions(
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System.Collections.ObjectModel.ReadOnlyCollection<EdmFunction> functionOverloads)
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{
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List<EdmFunction> cTypeFunctions = new List<EdmFunction>();
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foreach (var sTypeFunction in functionOverloads)
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{
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cTypeFunctions.Add(ConvertToCTypeFunction(sTypeFunction));
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}
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return cTypeFunctions.AsReadOnly();
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}
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internal EdmFunction ConvertToCTypeFunction(EdmFunction sTypeFunction)
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{
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return this._cachedCTypeFunction.Evaluate(sTypeFunction);
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}
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/// <summary>
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/// Convert the S type function parameters and returnType to C types.
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/// </summary>
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private EdmFunction ConvertFunctionSignatureToCType(EdmFunction sTypeFunction)
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{
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Debug.Assert(sTypeFunction.DataSpace == Edm.DataSpace.SSpace, "sTypeFunction.DataSpace == Edm.DataSpace.SSpace");
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if (sTypeFunction.IsFromProviderManifest)
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{
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return sTypeFunction;
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}
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FunctionParameter returnParameter = null;
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if (sTypeFunction.ReturnParameter != null)
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{
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TypeUsage edmTypeUsageReturnParameter =
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MetadataHelper.ConvertStoreTypeUsageToEdmTypeUsage(sTypeFunction.ReturnParameter.TypeUsage);
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returnParameter =
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new FunctionParameter(
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sTypeFunction.ReturnParameter.Name,
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edmTypeUsageReturnParameter,
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sTypeFunction.ReturnParameter.GetParameterMode());
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}
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List<FunctionParameter> parameters = new List<FunctionParameter>();
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if (sTypeFunction.Parameters.Count > 0)
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{
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foreach (var parameter in sTypeFunction.Parameters)
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{
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TypeUsage edmTypeUsage = MetadataHelper.ConvertStoreTypeUsageToEdmTypeUsage(parameter.TypeUsage);
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FunctionParameter edmTypeParameter = new FunctionParameter(parameter.Name, edmTypeUsage, parameter.GetParameterMode());
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parameters.Add(edmTypeParameter);
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}
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}
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FunctionParameter[] returnParameters =
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returnParameter == null ? new FunctionParameter[0] : new FunctionParameter[] { returnParameter };
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EdmFunction edmFunction = new EdmFunction(sTypeFunction.Name,
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sTypeFunction.NamespaceName,
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DataSpace.CSpace,
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new EdmFunctionPayload
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{
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Schema = sTypeFunction.Schema,
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StoreFunctionName = sTypeFunction.StoreFunctionNameAttribute,
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CommandText = sTypeFunction.CommandTextAttribute,
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IsAggregate = sTypeFunction.AggregateAttribute,
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IsBuiltIn = sTypeFunction.BuiltInAttribute,
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IsNiladic = sTypeFunction.NiladicFunctionAttribute,
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IsComposable = sTypeFunction.IsComposableAttribute,
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IsFromProviderManifest = sTypeFunction.IsFromProviderManifest,
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IsCachedStoreFunction = true,
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IsFunctionImport = sTypeFunction.IsFunctionImport,
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ReturnParameters = returnParameters,
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Parameters = parameters.ToArray(),
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ParameterTypeSemantics = sTypeFunction.ParameterTypeSemanticsAttribute,
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});
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edmFunction.SetReadOnly();
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return edmFunction;
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}
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}//---- ItemCollection
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}//----
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