EntityProviderFactory.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / EntityClient / EntityProviderFactory.cs / 1305376 / EntityProviderFactory.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis; 
using System.Text;
using System.Data;
using System.Data.Common;
using System.Security; 
using System.Security.Permissions;
 
namespace System.Data.EntityClient 
{
    ///  
    /// Class representing a provider factory for the entity client provider
    /// 
    public sealed class EntityProviderFactory : DbProviderFactory, IServiceProvider
    { 
        /// 
        /// A singleton object for the entity client provider factory object 
        ///  
        [SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes", Justification = "EntityProviderFactory implements the singleton pattern and it's stateless.  This is needed in order to work with DbProviderFactories.")]
        public static readonly EntityProviderFactory Instance = new EntityProviderFactory(); 

        /// 
        /// Constructs the EntityProviderFactory object, this is private as users shouldn't create it directly
        ///  
        private EntityProviderFactory()
        { 
        } 

        ///  
        /// Creates a EntityCommand object and returns it
        /// 
        /// A EntityCommand object
        public override DbCommand CreateCommand() 
        {
            return new EntityCommand(); 
        } 

        ///  
        /// Creates a EntityCommandBuilder object and returns it
        /// 
        /// A EntityCommandBuilder object
        ///  
        public override DbCommandBuilder CreateCommandBuilder()
        { 
            throw EntityUtil.NotSupported(); 
        }
 
        /// 
        /// Creates a EntityConnection object and returns it
        /// 
        /// A EntityConnection object 
        public override DbConnection CreateConnection()
        { 
            return new EntityConnection(); 
        }
 
        /// 
        /// Creates a EntityConnectionStringBuilder object and returns it
        /// 
        /// A EntityConnectionStringBuilder object 
        public override DbConnectionStringBuilder CreateConnectionStringBuilder()
        { 
            return new EntityConnectionStringBuilder(); 
        }
 
        /// 
        /// Creates a DbDataAdapter object and returns it, this method is currently not supported
        /// 
        /// A DbDataAdapter object 
        /// 
        public override DbDataAdapter CreateDataAdapter() 
        { 
            throw EntityUtil.NotSupported();
        } 

        /// 
        /// Creates a EntityParameter object and returns it
        ///  
        /// A EntityParameter object
        public override DbParameter CreateParameter() 
        { 
            return new EntityParameter();
        } 

        /// 
        /// Creates a CodeAccessPermission object and returns it
        ///  
        /// The permission state level for the code access
        /// A CodeAccessPermission object 
        public override CodeAccessPermission CreatePermission(PermissionState state) 
        {
            throw EntityUtil.NotSupported(); 
        }

        /// 
        /// Extension mechanism for additional services; 
        /// 
        /// requested service provider or null. 
        object IServiceProvider.GetService(Type serviceType) { 
            object result = null;
            if (serviceType == typeof(DbProviderServices)) { 
                result = EntityProviderServices.Instance;
            }
            else if (serviceType == typeof(IEntityAdapter)) {
                result = new EntityAdapter(); 
            }
            return result; 
        } 
    }
} 

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

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