LazyTextWriterCreator.cs source code in C# .NET

                        Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntityDesign / Design / System / Data / EntityModel / LazyTextWriterCreator.cs / 1 / LazyTextWriterCreator.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 
using System;
using System.Collections.Generic; 
using System.Linq;
using System.Text;
using System.IO;
using System.Diagnostics; 

namespace System.Data.Entity.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 = null;
        private string _targetFilePath = null;

        internal LazyTextWriterCreator(TextWriter writer) 
        {
            Debug.Assert(writer != null, "writer parameter is null"); 
 
            _ownTextWriter = false;
            _writer = writer; 
        }

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

        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();
            } 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 
using System;
using System.Collections.Generic; 
using System.Linq;
using System.Text;
using System.IO;
using System.Diagnostics; 

namespace System.Data.Entity.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 = null;
        private string _targetFilePath = null;

        internal LazyTextWriterCreator(TextWriter writer) 
        {
            Debug.Assert(writer != null, "writer parameter is null"); 
 
            _ownTextWriter = false;
            _writer = writer; 
        }

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

        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();
            } 
        }
    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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LazyTextWriterCreator.cs source code in C# .NET

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