TaskFileService.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Build / MS / Internal / Tasks / TaskFileService.cs / 1 / TaskFileService.cs

                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
// 
//    File service for the input source files in a build task.
// 
//    The service does something like below:
//
//          return stream for a given source file,
//          get last modification time in memory or disk. 
//
//          or get the link metadata part of a source file. 
// 
//    It returns above information no matter the task is hosted
//    inside VS or not. 
//
// History:
//       01/24/2007,  [....] created it
//       03/28/2007,  [....] added support of Exists, Delete, PutFileContents, IsRealBuild 
//
//--------------------------------------------------------------------------- 
 
using System;
using System.IO; 
using Microsoft.Build.Utilities;
using System.Diagnostics;
using System.Text;
 
namespace MS.Internal
{ 
    // 
    // Declaration of interface ITaskFileService
    // 
    internal interface ITaskFileService
    {
        //
        // Get content stream for a given source file 
        //
        Stream GetContent(string srcFile); 
 
        //
        // Get the last modificatin time for a given file. 
        //
        DateTime GetLastChangeTime(string srcFile);

        // 
        // Checks to see if file exists
        // 
        bool Exists(string fileName); 

        // 
        // Deletes the specified file
        //
        void Delete(string fileName);
 
        //
        // Save content stream for the given destination file 
        // 
        void WriteFile(byte[] contentArray, string destinationFile);
 
        //
        // Determines if this is a real build operation or an
        // intellisense build operation
        // 
        bool IsRealBuild {get;}
    } 
 
    //
    // TaskFileService class 
    //
    // This class can be used by different build tasks to get source file
    // service, the instance is created by those build tasks when task's
    // Execute( ) method is called. 
    //
    internal class TaskFileService : MarshalByRefObject, ITaskFileService 
    { 
        //
        // Ctor 
        //
        public TaskFileService(Task buildTask)
        {
            _buildTask = buildTask; 
            _hostFileManager = null;
            _isRealBuild = null; 
        } 

        #region ITaskFileService 

        //
        // Get content stream for a given source file, the content could
        // come from memory or disk based on the build host environment. 
        //
        // It is the caller's responsibility to close the stream. 
        // 
        public Stream GetContent(string srcFile)
        { 
            Stream fileStream = null;

            if (String.IsNullOrEmpty(srcFile))
            { 
                throw new ArgumentNullException("srcFile");
            } 
 
            if (HostFileManager != null)
            { 
                //
                // Build Host environment has a FileManager, use it to get
                // file content from edit buffer in memory.  GetFileContents
                // removes the BOM before returning the string. 
                //
                string strFileContent = HostFileManager.GetFileContents(srcFile); 
 

                // IVsMsBuildTaskFileManager.GetFileContents should never return null. 
                // GetBytes might throw when input is null, but that should be fine.
                //
                // For xaml file, UTF8 is the standard encoding
                // 

                UTF8Encoding utf8Encoding = new UTF8Encoding(); 
 
                byte[] baFileContent = utf8Encoding.GetBytes(strFileContent);
 
                fileStream = new MemoryStream(baFileContent);

            }
            else 
            {
                fileStream = File.OpenRead(srcFile); 
            } 

            return fileStream; 
        }

        //
        // Get the last modificatin time for a given file. 
        //
        public DateTime GetLastChangeTime(string srcFile) 
        { 
            DateTime lastChangeDT = new DateTime(0);
 
            if (String.IsNullOrEmpty(srcFile))
            {
                throw new ArgumentNullException("srcFile");
            } 

            if (HostFileManager != null) 
            { 
                long fileTime = HostFileManager.GetFileLastChangeTime(srcFile);
                lastChangeDT = DateTime.FromFileTime(fileTime); 
            }
            else
            {
                lastChangeDT = File.GetLastWriteTime(srcFile); 
            }
 
            return lastChangeDT; 
        }
 

        //
        // Checks to see if file exists
        // 
        public bool Exists(string fileName)
        { 
            bool fileExists = false; 

            if (fileName == null) 
            {
                throw new ArgumentNullException("fileName");
            }
 
            if (HostFileManager != null)
            { 
                fileExists = HostFileManager.Exists(fileName, IsRealBuild); 
            }
            else 
            {
                fileExists = File.Exists(fileName);
            }
 
            return fileExists;
        } 
 
        //
        // Deletes the specified file 
        //
        public void Delete(string fileName)
        {
            if (fileName == null) 
            {
                throw new ArgumentNullException("fileName"); 
            } 

            if (HostFileManager != null) 
            {
                HostFileManager.Delete(fileName);
            }
            else 
            {
                File.Delete(fileName); 
            } 
        }
 
        //
        // Save content stream for the given destination file
        // UTF8 BOM should not be added to the contentArray.  This
        // method adds BOM before writing file to disk. 
        //
        public void WriteFile(byte[] contentArray, string destinationFile) 
        { 
            if (String.IsNullOrEmpty(destinationFile))
            { 
                throw new ArgumentNullException("destinationFile");
            }

            if (contentArray == null) 
            {
                throw new ArgumentNullException("contentArray"); 
            } 

            UTF8Encoding utf8Encoding = new UTF8Encoding(); 
            string contentStr = utf8Encoding.GetString(contentArray);

            if (HostFileManager != null)
            { 
                // PutGeneratedFileContents adds BOM to the file when saving
                // to memory or disk. 
                HostFileManager.PutGeneratedFileContents(destinationFile, contentStr); 
            }
            else 
            {
                // Add BOM for UTF8Encoding since the input contentArray is not supposed to
                // have it already.
                using (StreamWriter sw = new StreamWriter(destinationFile, false, new UTF8Encoding(true))) 
                {
                    sw.WriteLine(contentStr); 
                } 
            }
        } 


        //
        // Tells if this is an intellisense build or a real build. 
        // Caching the result since this is called a lot of times.
        // 
        public bool IsRealBuild 
        {
            get 
            {
                if (_isRealBuild == null)
                {
                    bool isRealBuild = true; 

                    if (HostFileManager != null) 
                    { 
                        isRealBuild = HostFileManager.IsRealBuildOperation();
                    } 

                    _isRealBuild = isRealBuild;
                }
 
                return _isRealBuild.Value;
            } 
        } 

        #endregion ITaskFileService 

        #region private property

        // 
        // Get the FileManager implemented by the Host system
        // 
        private IVsMSBuildTaskFileManager HostFileManager 
        {
            get 
            {
                if (_hostFileManager == null)
                {
                    if (_buildTask != null && _buildTask.HostObject != null) 
                    {
                        _hostFileManager = _buildTask.HostObject as IVsMSBuildTaskFileManager; 
                    } 
                }
 
                return _hostFileManager;
            }
        }
 

        #endregion private property 
 

        #region private data field 

        private Task _buildTask;
        private IVsMSBuildTaskFileManager _hostFileManager;
        private Nullable _isRealBuild; 

        #endregion private data field 
 
    }
 

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
                        

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