// created on 1/7/2003 at 20:03
// Npgsql.NpgsqlExecute.cs
//
// Author:
//    Francisco Jr. (fxjrlists@yahoo.com.br)
//
//    Copyright (C) 2002 The Npgsql Development Team
//    npgsql-general@gborg.postgresql.org
//    http://gborg.postgresql.org/project/npgsql/projdisplay.php
//
// 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.

using System;
using System.IO;

namespace Npgsql
{
    /// <summary>
    /// This class represents the Execute message sent to PostgreSQL
    /// server.
    /// </summary>
    ///
    internal sealed class NpgsqlExecute : ClientMessage
    {
        private readonly String _portalName;
        private readonly byte[] _messageData;

        public NpgsqlExecute(String portalName, Int32 maxRows)
        {
            int messageLength = 4 + portalName.Length + 1 + 4;
            _messageData = new byte[messageLength + 1];
            MemoryStream messageBuilder = new MemoryStream(_messageData);

            _portalName = portalName;

            messageBuilder
                .WriteBytes((byte)FrontEndMessageCode.Execute)
                .WriteInt32(messageLength)
                .WriteStringNullTerminated(_portalName)
                .WriteInt32(maxRows);
        }

        public String PortalName
        {
            get { return _portalName; }
        }

        public override void WriteToStream(Stream outputStream)
        {
            outputStream.WriteBytes(_messageData);
        }
    }
}
