EntityProviderServices.cs source code in C# .NET

                        Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / EntityClient / EntityProviderServices.cs / 3 / EntityProviderServices.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//----------------------------------------------------------------------------- 
 
namespace System.Data.EntityClient {
 
    using System.Collections.Generic;
    using System.Data.Common.CommandTrees;
    using System.Data.Common;
    using System.IO; 
    using System.Xml;
    using System.Data.Metadata.Edm; 
    using System.Diagnostics; 

    ///  
    /// The class for provider services of the entity client
    /// 
    internal sealed class EntityProviderServices : DbProviderServices {
 
        /// 
        /// Singleton object; 
        ///  
        internal static readonly EntityProviderServices Instance = new EntityProviderServices();
 
        /// 
        /// Create a Command Definition object, given the connection and command tree
        /// 
        /// connection to the underlying provider 
        /// command tree for the statement
        /// an exectable command definition object 
        /// connection and commandTree arguments must not be null 
        protected override DbCommandDefinition CreateDbCommandDefinition(DbProviderManifest providerManifest, DbCommandTree commandTree) {
            EntityUtil.CheckArgumentNull(providerManifest, "providerManifest"); 
            EntityUtil.CheckArgumentNull(commandTree, "commandTree");

            StoreItemCollection storeMetadata = (StoreItemCollection)commandTree.MetadataWorkspace.GetItemCollection(DataSpace.SSpace);
            return this.CreateCommandDefinition(storeMetadata.StoreProviderFactory, commandTree); 
        }
 
        internal EntityCommandDefinition CreateCommandDefinition(DbProviderFactory storeProviderFactory, DbCommandTree commandTree) { 
            EntityUtil.CheckArgumentNull(storeProviderFactory, "storeProviderFactory");
            Debug.Assert(commandTree != null, "Command Tree cannot be null"); 

            return new EntityCommandDefinition(storeProviderFactory, commandTree);
        }
 
        /// 
        /// Create a EntityCommandDefinition object based on the prototype command 
        /// This method is intended for provider writers to build a default command definition 
        /// from a command.
        ///  
        /// 
        /// 
        /// prototype argument must not be null
        /// prototype argument must be a EntityCommand 
        public override DbCommandDefinition CreateCommandDefinition(DbCommand prototype) {
            EntityUtil.CheckArgumentNull(prototype, "prototype"); 
            return ((EntityCommand)prototype).GetCommandDefinition(); 
        }
 
        protected override string GetDbProviderManifestToken(DbConnection connection)
        {
            EntityUtil.CheckArgumentNull(connection, "connection");
            if (connection.GetType() != typeof(EntityConnection)) 
            {
                throw EntityUtil.Argument(System.Data.Entity.Strings.Mapping_Provider_WrongConnectionType(typeof(EntityConnection))); 
            } 

            return MetadataItem.EdmProviderManifest.Token; 
        }

        protected override DbProviderManifest GetDbProviderManifest(string versionHint)
        { 
            EntityUtil.CheckArgumentNull(versionHint, "versionHint");
            return MetadataItem.EdmProviderManifest; 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....], [....]
//----------------------------------------------------------------------------- 
 
namespace System.Data.EntityClient {
 
    using System.Collections.Generic;
    using System.Data.Common.CommandTrees;
    using System.Data.Common;
    using System.IO; 
    using System.Xml;
    using System.Data.Metadata.Edm; 
    using System.Diagnostics; 

    ///  
    /// The class for provider services of the entity client
    /// 
    internal sealed class EntityProviderServices : DbProviderServices {
 
        /// 
        /// Singleton object; 
        ///  
        internal static readonly EntityProviderServices Instance = new EntityProviderServices();
 
        /// 
        /// Create a Command Definition object, given the connection and command tree
        /// 
        /// connection to the underlying provider 
        /// command tree for the statement
        /// an exectable command definition object 
        /// connection and commandTree arguments must not be null 
        protected override DbCommandDefinition CreateDbCommandDefinition(DbProviderManifest providerManifest, DbCommandTree commandTree) {
            EntityUtil.CheckArgumentNull(providerManifest, "providerManifest"); 
            EntityUtil.CheckArgumentNull(commandTree, "commandTree");

            StoreItemCollection storeMetadata = (StoreItemCollection)commandTree.MetadataWorkspace.GetItemCollection(DataSpace.SSpace);
            return this.CreateCommandDefinition(storeMetadata.StoreProviderFactory, commandTree); 
        }
 
        internal EntityCommandDefinition CreateCommandDefinition(DbProviderFactory storeProviderFactory, DbCommandTree commandTree) { 
            EntityUtil.CheckArgumentNull(storeProviderFactory, "storeProviderFactory");
            Debug.Assert(commandTree != null, "Command Tree cannot be null"); 

            return new EntityCommandDefinition(storeProviderFactory, commandTree);
        }
 
        /// 
        /// Create a EntityCommandDefinition object based on the prototype command 
        /// This method is intended for provider writers to build a default command definition 
        /// from a command.
        ///  
        /// 
        /// 
        /// prototype argument must not be null
        /// prototype argument must be a EntityCommand 
        public override DbCommandDefinition CreateCommandDefinition(DbCommand prototype) {
            EntityUtil.CheckArgumentNull(prototype, "prototype"); 
            return ((EntityCommand)prototype).GetCommandDefinition(); 
        }
 
        protected override string GetDbProviderManifestToken(DbConnection connection)
        {
            EntityUtil.CheckArgumentNull(connection, "connection");
            if (connection.GetType() != typeof(EntityConnection)) 
            {
                throw EntityUtil.Argument(System.Data.Entity.Strings.Mapping_Provider_WrongConnectionType(typeof(EntityConnection))); 
            } 

            return MetadataItem.EdmProviderManifest.Token; 
        }

        protected override DbProviderManifest GetDbProviderManifest(string versionHint)
        { 
            EntityUtil.CheckArgumentNull(versionHint, "versionHint");
            return MetadataItem.EdmProviderManifest; 
        } 
    }
} 

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

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