LazyTextWriterCreator.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataWeb / Design / system / Data / EntityModel / LazyTextWriterCreator.cs / 1305376 / LazyTextWriterCreator.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 
using System.Diagnostics;
using System.IO; 

namespace System.Data.Services.Design
{
    ///  
    /// This class is responsible for abstracting the knowledge
    /// of whether the user provided a TextWriter or a FilePath. 
    /// 
    /// If the user gave us a filePath we try not to create the TextWriter
    /// till we absolutely need it in order to prevent the file from being created 
    /// in error cases.
    /// 
    internal class LazyTextWriterCreator : IDisposable
    { 
        private bool _ownTextWriter;
        private TextWriter _writer; 
        private string _targetFilePath; 

        internal LazyTextWriterCreator(string targetFilePath) 
        {
            Debug.Assert(targetFilePath != null, "targetFilePath parameter is null");

            _ownTextWriter = true; 
            _targetFilePath = targetFilePath;
        } 
 
        internal LazyTextWriterCreator(TextWriter writer)
        { 
            _writer = writer;
        }

        internal TextWriter GetOrCreateTextWriter() 
        {
            if (_writer == null) 
            { 
                // lazy creating the writer
                _writer = new StreamWriter(_targetFilePath); 
            }
            return _writer;
        }
 
        internal string TargetFilePath
        { 
            get { return _targetFilePath; } 
        }
 
        public void Dispose()
        {
            if (_ownTextWriter && _writer != null)
            { 
                _writer.Dispose();
            } 
 
            GC.SuppressFinalize(this);
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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