using system;
using system.componentmodel;
using system.data;
using system.xml;

namespace system.data.xmlclient
{

  public class xmlconnection : component, idbconnection, icloneable
    {
    // constructors
        public xmlconnection()
        {
        }

    public xmlconnection(string connectionstring)
    {
      _connstring = connectionstring;
    }

    ////////////////////
    // idbconnection
    ////////////////////

    // public properties
    public string connectionstring
    {
      get { return _connstring;  }
      set { _connstring = value; }
    }
    
    public int connectiontimeout
    {
      get
      {
        throw new invalidoperationexception("xmlclient provider does not support this function");
      }
    }
    public string database
    {
      get
      {
        throw new invalidoperationexception("xmlclient provider does not support this function");
      }
    }
    public connectionstate state
    {
      get { return _connstate; }
    }

    // public methods
    public idbtransaction begintransaction()
    {
      throw new invalidoperationexception("xmlclient provider does not support this function");
    }

    public idbtransaction begintransaction(isolationlevel lvl)
    {
      throw new invalidoperationexception("xmlclient provider does not support this function");
    }

    public void changedatabase(string databasename)
    {
      throw new invalidoperationexception("xmlclient provider does not support this function");
    }

    public void close()
    {
      _doc.removeall();
      _connstate = connectionstate.closed;
    }

    public idbcommand createcommand()
    {
      return new xmlcommand("", this);
    }

    public void open()
    {
      _doc.load(_connstring);
      _connstate = connectionstate.open;
    }

    ////////////////////
    // icloneable
    ////////////////////
    public object clone()
    {
      return null;
    }

    ////////////////////
    // internal data members
    ////////////////////
    internal connectionstate  _connstate = connectionstate.closed;
    internal string           _connstring = "";
    internal xmldocument      _doc = new xmldocument();

  }
}