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using System;
using System.IO;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace LumiSoft.Net
{
    /// <summary>
    /// This stream just junks all written data.
    /// </summary>
    public class JunkingStream : Stream
    {
        /// <summary>
        /// Default constructor.
        /// </summary>
        public JunkingStream()
        {
        }


        #region method Flush

        /// <summary>
        /// Not used.
        /// </summary>
        public override void Flush()
        {
        }

        #endregion

        #region method Seek

        /// <summary>
        /// Sets the current position of the stream to the given value. This method always throws a NotSupportedException.
        /// </summary>
        /// <param name="offset">This parameter is not used.</param>
        /// <param name="origin">This parameter is not used.</param>
        /// <returns></returns>
        public override long Seek(long offset,SeekOrigin origin)
        {
            throw new NotSupportedException();
        }

        #endregion

        #region method SetLength

        /// <summary>
        /// Sets the length of the stream. This method always throws a NotSupportedException.
        /// </summary>
        /// <param name="value">This parameter is not used.</param>
        public override void SetLength(long value)
        {
            throw new NotSupportedException();
        }

        #endregion

        #region method Read

        /// <summary>
        /// Reads data from the stream. This method always throws a NotSupportedException.
        /// </summary>
        /// <param name="buffer">This parameter is not used.</param>
        /// <param name="offset">This parameter is not used.</param>
        /// <param name="size">This parameter is not used.</param>
        /// <returns></returns>
        public override int Read([In,Out] byte[] buffer,int offset,int size)
        {
            throw new NotSupportedException();
        }

        #endregion

        #region method Write

        /// <summary>
        /// Writes data to the stream.
        /// </summary>
        /// <param name="buffer">An array of type Byte that contains the data to write to the stream.</param>
        /// <param name="offset">The location in buffer from which to start writing data.</param>
        /// <param name="size">The number of bytes to write to the stream.</param>
        public override void Write(byte[] buffer,int offset,int size)
        {
        }

        #endregion


        #region Properties Implementation

        /// <summary>
        /// Gets a value indicating whether the stream supports reading. This property always returns false.
        /// </summary>
        public override bool CanRead
        {
            get{ return false; }
        }

        /// <summary>
        /// Gets a value indicating whether the stream supports seeking. This property always returns false.
        /// </summary>
        public override bool CanSeek
        {
            get{ return false; }
        }

        /// <summary>
        /// Gets a value that indicates whether the stream supports writing.
        /// </summary>
        public override bool CanWrite
        {
            get{ return true; }
        }

        /// <summary>
        /// Gets the length of the data available on the stream. This property always throws a NotSupportedException.
        /// </summary>
        public override long Length
        {
            get{ throw new NotSupportedException(); }
        }

        /// <summary>
        /// Gets or sets the current position in the stream. This property always throws a NotSupportedException.
        /// </summary>
        public override long Position
        {
            get{ throw new NotSupportedException(); }

            set{ throw new NotSupportedException(); }
        }

        #endregion
    }
}