Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Common / DbProviderManifest.cs / 1305376 / DbProviderManifest.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Collections.Generic; using System.Collections.ObjectModel; using System.Data.Metadata.Edm; using System.Xml; namespace System.Data.Common { ////// Metadata Interface for all CLR types types /// [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")] public abstract class DbProviderManifest { ////// Constructor /// protected DbProviderManifest() { } ///Value to pass to GetInformation to get the StoreSchemaDefinition public static readonly string StoreSchemaDefinition = "StoreSchemaDefinition"; ///Value to pass to GetInformation to get the StoreSchemaMapping public static readonly string StoreSchemaMapping = "StoreSchemaMapping"; ///Value to pass to GetInformation to get the ConceptualSchemaDefinition public static readonly string ConceptualSchemaDefinition = "ConceptualSchemaDefinition"; // System Facet Info ////// Name of the MaxLength Facet /// internal const string MaxLengthFacetName = "MaxLength"; ////// Name of the Unicode Facet /// internal const string UnicodeFacetName = "Unicode"; ////// Name of the FixedLength Facet /// internal const string FixedLengthFacetName = "FixedLength"; ////// Name of the Precision Facet /// internal const string PrecisionFacetName = "Precision"; ////// Name of the Scale Facet /// internal const string ScaleFacetName = "Scale"; ////// Name of the Nullable Facet /// internal const string NullableFacetName = "Nullable"; ////// Name of the DefaultValue Facet /// internal const string DefaultValueFacetName = "DefaultValue"; ////// Name of the Collation Facet /// internal const string CollationFacetName = "Collation"; ////// Returns the namespace used by this provider manifest /// public abstract string NamespaceName {get;} ////// Return the set of types supported by the store /// ///A collection of primitive types public abstract System.Collections.ObjectModel.ReadOnlyCollectionGetStoreTypes(); /// /// Returns all the edm functions supported by the provider manifest. /// ///A collection of edm functions. public abstract System.Collections.ObjectModel.ReadOnlyCollectionGetStoreFunctions(); /// /// Returns all the FacetDescriptions for a particular type /// /// the type to return FacetDescriptions for ///The FacetDescriptions for the type given [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "edm")] public abstract System.Collections.ObjectModel.ReadOnlyCollectionGetFacetDescriptions(EdmType edmType); /// /// This method allows a provider writer to take a type and a set of facets /// and reason about what the best mapped equivalent type in EDM would be. /// /// A TypeUsage encapsulating a store type and a set of facets ///A TypeUsage encapsulating an EDM type and a set of facets [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Edm")] public abstract TypeUsage GetEdmType(TypeUsage storeType); ////// This method allows a provider writer to take a type and a set of facets /// and reason about what the best mapped equivalent type in the store would be. /// /// A TypeUsage encapsulating an EDM type and a set of facets ///A TypeUsage encapsulating a store type and a set of facets [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "edm")] public abstract TypeUsage GetStoreType(TypeUsage edmType); ////// Providers should override this to return information specific to their provider. /// /// This method should never return null. /// /// The name of the information to be retrieved. ///An XmlReader at the begining of the information requested. [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "Db")] protected abstract XmlReader GetDbInformation(string informationType); ////// Gets framework and provider specific information /// /// This method should never return null. /// /// The name of the information to be retrieved. ///An XmlReader at the begining of the information requested. public XmlReader GetInformation(string informationType) { XmlReader reader = null; try { reader = GetDbInformation(informationType); } catch (Exception e) { // we should not be wrapping all exceptions if (EntityUtil.IsCatchableExceptionType(e)) { // we don't want folks to have to know all the various types of exceptions that can // occur, so we just rethrow a ProviderIncompatibleException and make whatever we caught // the inner exception of it. throw EntityUtil.ProviderIncompatible( System.Data.Entity.Strings.EntityClient_FailedToGetInformation(informationType), e); } throw; } if (reader == null) { // if the provider returned null for the conceptual schema definition, return the default one if (informationType == ConceptualSchemaDefinition) { return DbProviderServices.GetConceptualSchemaDescription(); } throw EntityUtil.ProviderIncompatible(System.Data.Entity.Strings.ProviderReturnedNullForGetDbInformation(informationType)); } return reader; } ////// Does the provider support escaping strings to be used as patterns in a Like expression. /// If the provider overrides this method to return true, /// If the provider supports escaping, the character that would be used /// as the escape character ///should /// also be overridden. /// True, if this provider supports escaping strings to be used as patterns in a Like expression, /// false otherwise. The default implementation returns false. public virtual bool SupportsEscapingLikeArgument(out char escapeCharacter) { escapeCharacter = default(char); return false; } ////// Provider writers should override this method to returns the argument with the wildcards and the escape /// character escaped. This method is only used if /// The argument to be escaped ///returns true. /// The argument with the wildcards and the escape character escaped public virtual string EscapeLikeArgument(string argument) { throw EntityUtil.ProviderIncompatible(System.Data.Entity.Strings.ProviderShouldOverrideEscapeLikeArgument); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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