Dao.cs :  » Persistence-Frameworks » iBATIS.NET » IBatisNet » DataAccess » Configuration » C# / CSharp Open Source

#region Apache Notice
/*****************************************************************************
 * $Header: $
 * $Revision: 408164 $
 * $Date: 2006-05-21 14:27:09 +0200 (dim., 21 mai 2006) $
 * 
 * iBATIS.NET Data Mapper
 * Copyright (C) 2004 - Gilles Bayon
 *  
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 ********************************************************************************/
#endregion

#region Imports
using System;
using System.Xml.Serialization;

using IBatisNet.Common.Exceptions;
using IBatisNet.Common.Utilities;
using IBatisNet.DataAccess.Interfaces;
using IBatisNet.DataAccess;
#endregion

namespace IBatisNet.DataAccess.Configuration{
  /// <summary>
  /// Summary description for 
  /// </summary>
  [Serializable]
  [XmlRoot("dao", Namespace="http://ibatis.apache.org/dataAccess")]
  public class Dao
  {
    #region Fields
    [NonSerialized]
    private string _interface;
    [NonSerialized]
    private string _implementation;
    [NonSerialized]
    private Type _daoImplementation = null;
    [NonSerialized]
    private Type _daoInterface = null;
    [NonSerialized]
    private IDao _daoInstance= null;
    [NonSerialized]
    private IDao _proxy = null;
    [NonSerialized]
    private DaoManager _daoManager = null;
    #endregion
  
    #region Properties
    /// <summary>
    /// The implementation class of the dao. 
    /// </summary>
    /// <example>IBatisNet.DataAccess.Test.Implementations.MSSQL.SqlAccountDao</example>
    [XmlAttribute("implementation")]
    public string Implementation
    {
      get { return _implementation; }
      set
      {
        if ((value == null) || (value.Length < 1))
        {
          throw new ArgumentNullException("The implementation attribut is mandatory in a dao tag.");
        }
        _implementation = value;
      }
    }


    /// <summary>
    /// The Interface class that the dao must implement.
    /// </summary>
    [XmlAttribute("interface")]
    public string Interface
    {
      get { return _interface; }
      set
      {
        if ((value == null) || (value.Length < 1))
        {
          throw new ArgumentNullException("The interface attribut is mandatory in a dao tag.");
        }
        _interface = value;
      }
    }

    /// <summary>
    /// The dao interface type.
    /// </summary>
    [XmlIgnoreAttribute]
    public Type DaoInterface
    {
      get { return _daoInterface; }

    }

    /// <summary>
    /// The dao implementation type.
    /// </summary>
    [XmlIgnoreAttribute]
    public Type DaoImplementation
    {
      get { return _daoImplementation; }

    }

    /// <summary>
    /// The concrete dao.
    /// </summary>
    [XmlIgnoreAttribute]
    public IDao DaoInstance
    {
      get { return _daoInstance; }

    }

    /// <summary>
    /// The proxy dao.
    /// </summary>
    [XmlIgnoreAttribute]
    public IDao Proxy
    {
      get { return _proxy; }

    }

    /// <summary>
    /// The DaoManager who manage this dao.
    /// </summary>
    [XmlIgnoreAttribute]
    public DaoManager DaoManager
    {
      get { return _daoManager; }

    }
    #endregion

    #region Constructor (s) / Destructor
    /// <summary>
    /// Do not use direclty, only for serialization.
    /// </summary>
    public Dao()
    {
    }
    #endregion

    #region Methods
    /// <summary>
    /// Initialize dao object.
    /// </summary>
    public void Initialize(DaoManager daoManager)
    {
      try
      {
        _daoManager = daoManager;
                _daoImplementation = TypeUtils.ResolveType(this.Implementation);
                _daoInterface = TypeUtils.ResolveType(this.Interface);
        // Create a new instance of the Dao object.
        _daoInstance = _daoImplementation.GetConstructor(Type.EmptyTypes).Invoke(null) as IDao;
        _proxy = DaoProxy.NewInstance(this);
      }
      catch(Exception e)
      {
        throw new ConfigurationException(string.Format("Error configuring DAO. Cause: {0}", e.Message), e);
      }
    }

    #endregion

  }
}