#region License
// The PostgreSQL License
//
// Copyright (C) 2016 The Npgsql Development Team
//
// Permission to use, copy, modify, and distribute this software and its
// documentation for any purpose, without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph and the following two paragraphs appear in all copies.
//
// IN NO EVENT SHALL THE NPGSQL DEVELOPMENT TEAM BE LIABLE TO ANY PARTY
// FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES,
// INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
// DOCUMENTATION, EVEN IF THE NPGSQL DEVELOPMENT TEAM HAS BEEN ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
// THE NPGSQL DEVELOPMENT TEAM SPECIFICALLY DISCLAIMS ANY WARRANTIES,
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
// ON AN "AS IS" BASIS, AND THE NPGSQL DEVELOPMENT TEAM HAS NO OBLIGATIONS
// TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
#endregion
using System;
using System.Data.Common;
using System.Reflection;
// Keep the xml comment warning quiet for this file.
#pragma warning disable 1591
namespace Npgsql
{
///
/// A factory to create instances of various Npgsql objects.
///
#if NET45 || NET451
[Serializable]
#endif
public sealed class NpgsqlFactory : DbProviderFactory, IServiceProvider
{
public static NpgsqlFactory Instance = new NpgsqlFactory();
private NpgsqlFactory()
{
}
///
/// Creates an NpgsqlCommand object.
///
public override DbCommand CreateCommand()
{
return new NpgsqlCommand();
}
public override DbConnection CreateConnection()
{
return new NpgsqlConnection();
}
public override DbParameter CreateParameter()
{
return new NpgsqlParameter();
}
public override DbConnectionStringBuilder CreateConnectionStringBuilder()
{
return new NpgsqlConnectionStringBuilder();
}
#if NET45 || NET451
public override DbCommandBuilder CreateCommandBuilder()
{
return new NpgsqlCommandBuilder();
}
public override DbDataAdapter CreateDataAdapter()
{
return new NpgsqlDataAdapter();
}
#endif
#region IServiceProvider Members
public object GetService(Type serviceType) {
// In legacy Entity Framework, this is the entry point for obtaining Npgsql's
// implementation of DbProviderServices. We use reflection for all types to
// avoid any dependencies on EF stuff in this project.
if (serviceType != null && serviceType.FullName == "System.Data.Common.DbProviderServices")
{
// User has requested a legacy EF DbProviderServices implementation. Check our cache first.
if (_legacyEntityFrameworkServices != null)
return _legacyEntityFrameworkServices;
// First time, attempt to find the EntityFramework5.Npgsql assembly and load the type via reflection
var assemblyName = typeof(NpgsqlFactory).GetTypeInfo().Assembly.GetName();
assemblyName.Name = "EntityFramework5.Npgsql";
Assembly npgsqlEfAssembly;
try {
npgsqlEfAssembly = Assembly.Load(new AssemblyName(assemblyName.FullName));
} catch (Exception e) {
throw new Exception("Could not load EntityFramework5.Npgsql assembly, is it installed?", e);
}
Type npgsqlServicesType;
if ((npgsqlServicesType = npgsqlEfAssembly.GetType("Npgsql.NpgsqlServices")) == null ||
npgsqlServicesType.GetProperty("Instance") == null)
throw new Exception("EntityFramework5.Npgsql assembly does not seem to contain the correct type!");
return _legacyEntityFrameworkServices = npgsqlServicesType.GetProperty("Instance", BindingFlags.Public | BindingFlags.Static).GetMethod.Invoke(null, new object[0]);
}
return null;
}
private static object _legacyEntityFrameworkServices;
#endregion
}
}
#pragma warning restore 1591