/*
 * File.Writer.CharacterCountingStreamWriter.cs
 * 
 * Copyright © 2009
 * Diversified Technical Systems, Inc.
 * All Rights Reserved
 */

using System;
using System.IO;
using System.Text;

namespace DTS.Serialization
{
    public abstract partial class File
    { // *** see File.cs ***
        public abstract partial class Writer<T>
        { // *** see File.Writer.cs ***

            /// <summary>
            /// A StreamWriter-style class for counting characters written to its stream.
            /// </summary>
            protected class CharacterCountingStreamWriter : StreamWriter
            {
                public CharacterCountingStreamWriter(Stream stream)
                    : base(stream)
                {
                    CharactersCounted = 0;
                }

                public CharacterCountingStreamWriter(string path)
                    : base(path)
                {
                    CharactersCounted = 0;
                }

                public CharacterCountingStreamWriter(Stream stream, Encoding encoding)
                    : base(stream, encoding)
                {
                    CharactersCounted = 0;
                }

                public CharacterCountingStreamWriter(String path, bool append)
                    : base(path, append)
                {
                    CharactersCounted = 0;
                }

                public CharacterCountingStreamWriter(Stream stream, Encoding encoding, int bufferSize)
                    : base(stream, encoding, bufferSize)
                {
                    CharactersCounted = 0;
                }

                public CharacterCountingStreamWriter(String path, bool append, Encoding encoding)
                    : base(path, append, encoding)
                {
                    CharactersCounted = 0;
                }

                public CharacterCountingStreamWriter(String path, bool append, Encoding encoding, int bufferSize)
                    : base(path, append, encoding, bufferSize)
                {
                    CharactersCounted = 0;
                }

                /// <summary>
                /// Get the <see cref="uint"/> number of characters that have been counted by this
                /// object since creation/reset.
                /// </summary>
                public uint CharactersCounted
                {
                    get;
                    private set;
                }

                /// <summary>
                /// Tally the characters contained in the specified string.
                /// </summary>
                /// 
                /// <param name="value">
                /// The <see cref="string"/> to be character-counted.
                /// </param>
                /// 
                public override void WriteLine(string value)
                {
                    try { CharactersCounted += (uint)value.Length; }
                    catch (System.Exception ex)
                    {
                        throw new ApplicationException("encountered problem counting written character string " + (null != value ? "\"" + value + "\"" : "<NULL>"), ex);
                    }
                }
            }

        } // *** end File.Writer ***
    } // *** end File ***
}