Microsoft Enterprise Library Data Access Block [DAAB] on Oracle Provider [ODP.NET]

//===============================================================================
// Microsoft patterns & practices Enterprise Library
// Data Access Application Block
//===============================================================================
// Copyright � Microsoft Corporation.  All rights reserved.
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY
// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE.
//===============================================================================

using System;
using System.Collections.Generic;
using System.Text;
using System.Configuration;
using System.ComponentModel;
using Microsoft.Practices.EnterpriseLibrary.Common.Configuration;

namespace Microsoft.Practices.EnterpriseLibrary.Data.Configuration
{
	/// <summary>
	/// Represents the mapping from an ADO.NET provider to an Enterprise Library <see cref="Database"/>.
	/// </summary>
	/// <remarks>
	/// <para>
	/// The Enterprise Library Data Access Application Block leverages the ADO.NET 2.0 provider factories. To determine what type of <see cref="Database"/> matches a given provider factory type, the optional 
	/// <see cref="DbProviderMapping"/> configuration objects can be defined in the block's configuration section.
	/// </para>
	/// <para>
	/// If a mapping is not present for a given provider type, sensible defaults will be used:
	/// <list type="bullet">
	/// <item>For provider name "System.Data.SqlClient", or for a provider of type <see cref="System.Data.SqlClient.SqlClientFactory"/>, the 
	/// <see cref="Microsoft.Practices.EnterpriseLibrary.Data.Sql.SqlDatabase"/> will be used.</item>
	/// <item>For provider name "System.Data.OracleClient", or for a provider of type <see cref="System.Data.OracleClient.OracleClientFactory"/>, the 
	/// <see cref="Microsoft.Practices.EnterpriseLibrary.Data.Oracle.OracleDatabase"/> will be used.</item>
	/// <item>In any other case, the <see cref="GenericDatabase"/> will be used.</item>
	/// </list>
	/// </para>
	/// </remarks>
	/// <seealso cref="DatabaseConfigurationView.GetProviderMapping(string, string)"/>
	/// <seealso cref="System.Data.Common.DbProviderFactory"/>
	public class DbProviderMapping : NamedConfigurationElement
	{
        private static AssemblyQualifiedTypeNameConverter typeConverter = new AssemblyQualifiedTypeNameConverter();

		/// <summary>
		/// Default name for the Sql managed provider.
		/// </summary>
		public const string DefaultSqlProviderName = "System.Data.SqlClient";
		/// <summary>
		/// Default name for the Oracle managed provider.
		/// </summary>
        public const string DefaultOracleProviderName = "Oracle.DataAccess.Client";

		internal const string DefaultGenericProviderName = "generic";
		private const string databaseTypeProperty = "databaseType";

		/// <summary>
		/// Initializes a new instance of the <see cref="DbProviderMapping"/> class.
		/// </summary>
		public DbProviderMapping()
		{
		}

		/// <summary>
		/// Initializes a new instance of the <see cref="DbProviderMapping"/> class with name and <see cref="Database"/> type.
		/// </summary>
		public DbProviderMapping(string dbProviderName, Type databaseType)
            : this(dbProviderName, (string) typeConverter.ConvertTo(databaseType, typeof(string)))
		{
			
		}

        /// <summary>
        /// Initializes a new instance of the <see cref="DbProviderMapping"/> class with name and fully qualified type name of the <see cref="Database"/> type.
        /// </summary>
        public DbProviderMapping(string dbProviderName, string databaseTypeName)
            : base(dbProviderName)
        {
            this.DatabaseTypeName = databaseTypeName;
        }
        

		/// <summary>
		/// Gets or sets the type of database to use for the mapped ADO.NET provider.
		/// </summary>
        public Type DatabaseType
        {
            get { return (Type)typeConverter.ConvertFrom(DatabaseTypeName); }
            set { DatabaseTypeName = typeConverter.ConvertToString(value); }
        }

        /// <summary>
        /// Gets or sets the fully qualified type name of the database to use for the mapped ADO.NET provider.
        /// </summary>
        /// <value>
        /// The fully qualified type name of the database to use for the mapped ADO.NET provider.
        /// </value>
        [ConfigurationProperty(databaseTypeProperty)]
        public string DatabaseTypeName
        {
            get { return (string)this[databaseTypeProperty]; }
            set { this[databaseTypeProperty] = value; }
        }

		/// <summary>
		///  Gets the logical name of the ADO.NET provider.
		/// </summary>
		public string DbProviderName
		{
			get { return Name; }
		}
	}
}