PreservationFileWriter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Compilation / PreservationFileWriter.cs / 1 / PreservationFileWriter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

 
 
namespace System.Web.Compilation {
 
using System;
using System.IO;
using System.Collections;
using System.Globalization; 
using System.Text;
using System.Xml; 
using System.Web.Util; 
using System.Web.UI;
 
internal class PreservationFileWriter {

    private XmlTextWriter _writer;
    private bool _precompilationMode; 

    internal const string fileDependenciesTagName = "filedeps"; 
    internal const string fileDependencyTagName = "filedep"; 
    internal const string buildResultDependenciesTagName = "builddeps";
    internal const string buildResultDependencyTagName = "builddep"; 

    internal PreservationFileWriter(bool precompilationMode) {
        _precompilationMode = precompilationMode;
    } 

    internal void SaveBuildResultToFile(string preservationFile, 
        BuildResult result, long hashCode) { 

        _writer = new XmlTextWriter(preservationFile, Encoding.UTF8); 

        try {
            _writer.Formatting = Formatting.Indented;
            _writer.Indentation = 4; 
            _writer.WriteStartDocument();
 
            //  
            _writer.WriteStartElement("preserve");
 
            // Save the type of BuildResult we're dealing with
            Debug.Assert(result.GetCode() != BuildResultTypeCode.Invalid);
            SetAttribute("resultType", ((int)result.GetCode()).ToString(CultureInfo.InvariantCulture));
 
            // Save the virtual path for this BuildResult
            if (result.VirtualPath != null) 
                SetAttribute("virtualPath", result.VirtualPath.VirtualPathString); 

            // Get the hash code of the BuildResult 
            long hash = result.ComputeHashCode(hashCode);

            // The hash should always be valid if we got here.
            Debug.Assert(hash != 0, "hash != 0"); 

            // Save it to the preservation file 
            SetAttribute("hash", hash.ToString("x", CultureInfo.InvariantCulture)); 

            // Can be null if that's what the VirtualPathProvider returns 
            string fileHash = result.VirtualPathDependenciesHash;
            if (fileHash != null)
                SetAttribute("filehash", fileHash);
 
            result.SetPreservedAttributes(this);
 
            SaveDependencies(result.VirtualPathDependencies); 

            //  
            _writer.WriteEndElement();
            _writer.WriteEndDocument();

            _writer.Close(); 
        }
        catch { 
 
            // If an exception occurs during the writing of the xml file, clean it up
            _writer.Close(); 
            File.Delete(preservationFile);

            throw;
        } 
    }
 
    private void SaveDependencies(ICollection dependencies) { 

        // Write all the dependencies 
        if (dependencies != null) {
            // 
            _writer.WriteStartElement(fileDependenciesTagName);
 
            foreach (string vpath in dependencies) {
                // e.g.  
                _writer.WriteStartElement(fileDependencyTagName); 
                _writer.WriteAttributeString("name", vpath);
                _writer.WriteEndElement(); 
            }

            // 
            _writer.WriteEndElement(); 
        }
    } 
 
    internal void SetAttribute(string name, string value) {
        _writer.WriteAttributeString(name, value); 
    }
}

}

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