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using System;
using System.Data.Common;
namespace Npgsql;
/// <summary>
/// A factory to create instances of various Npgsql objects.
/// </summary>
[Serializable]
public sealed class NpgsqlFactory : DbProviderFactory, IServiceProvider
{
/// <summary>
/// Gets an instance of the <see cref="NpgsqlFactory"/>.
/// This can be used to retrieve strongly typed data objects.
/// </summary>
public static readonly NpgsqlFactory Instance = new();
NpgsqlFactory() {}
/// <summary>
/// Returns a strongly typed <see cref="DbCommand"/> instance.
/// </summary>
public override DbCommand CreateCommand() => new NpgsqlCommand();
/// <summary>
/// Returns a strongly typed <see cref="DbConnection"/> instance.
/// </summary>
public override DbConnection CreateConnection() => new NpgsqlConnection();
/// <summary>
/// Returns a strongly typed <see cref="DbParameter"/> instance.
/// </summary>
public override DbParameter CreateParameter() => new NpgsqlParameter();
/// <summary>
/// Returns a strongly typed <see cref="DbConnectionStringBuilder"/> instance.
/// </summary>
public override DbConnectionStringBuilder CreateConnectionStringBuilder() => new NpgsqlConnectionStringBuilder();
/// <summary>
/// Returns a strongly typed <see cref="DbCommandBuilder"/> instance.
/// </summary>
public override DbCommandBuilder CreateCommandBuilder() => new NpgsqlCommandBuilder();
/// <summary>
/// Returns a strongly typed <see cref="DbDataAdapter"/> instance.
/// </summary>
public override DbDataAdapter CreateDataAdapter() => new NpgsqlDataAdapter();
/// <summary>
/// Specifies whether the specific <see cref="DbProviderFactory"/> supports the <see cref="DbDataAdapter"/> class.
/// </summary>
public override bool CanCreateDataAdapter => true;
/// <summary>
/// Specifies whether the specific <see cref="DbProviderFactory"/> supports the <see cref="DbCommandBuilder"/> class.
/// </summary>
public override bool CanCreateCommandBuilder => true;
/// <inheritdoc/>
public override bool CanCreateBatch => true;
/// <inheritdoc/>
public override DbBatch CreateBatch() => new NpgsqlBatch();
/// <inheritdoc/>
public override DbBatchCommand CreateBatchCommand() => new NpgsqlBatchCommand();
/// <inheritdoc/>
public override DbDataSource CreateDataSource(string connectionString)
=> NpgsqlDataSource.Create(connectionString);
#region IServiceProvider Members
/// <summary>
/// Gets the service object of the specified type.
/// </summary>
/// <param name="serviceType">An object that specifies the type of service object to get.</param>
/// <returns>A service object of type serviceType, or null if there is no service object of type serviceType.</returns>
public object? GetService(Type serviceType) => null;
#endregion
}