ExternalSourceControlHistoryParser.cs :  » Build-Systems » CruiseControl.NET » ThoughtWorks » CruiseControl » Core » Sourcecontrol » C# / CSharp Open Source

using System;
using System.Collections.Generic;
using System.IO;
using System.Xml;
using System.Xml.Serialization;
using ThoughtWorks.CruiseControl.Core.Util;

namespace ThoughtWorks.CruiseControl.Core.Sourcecontrol{
  /// <summary>
  /// Parser for ExternalSourceControl modification output.
  /// </summary>
  public class ExternalSourceControlHistoryParser : IHistoryParser
  {
        /// This method creates and runs a command to list all the modifications in the specified 
        /// timespan, and expects the modifications to be returned in the serialized form of the
        /// ThoughtWorks.CruiseControl.Core.Modification class <i>ala</i> 
        /// <see cref="System.Xml.Serialization.XmlSerializer.Serialize(Stream, object)"/>.

        #region Fields
        // None yet.
        #endregion

        #region Constructors

        public ExternalSourceControlHistoryParser()
    {
        }

        #endregion

        #region Interface methods

        /// <summary>
    /// Construct and return an array of Modifications describing the changes in
    /// the AccuRev workspace, based on the output of the "accurev hist" command.
    /// </summary>
        /// <param name="history">the stream of <code>&lt;modifications&gt;</code> input</param>
    /// <param name="from">the starting date and time for the range of modifications we want.</param>
    /// <param name="to">the ending date and time for the range of modifications we want.</param>
    /// <returns>the changes in the specified time range.</returns>
    public Modification[] Parse(TextReader history, DateTime from, DateTime to)
        {
          XmlSerializer serializer = new XmlSerializer(typeof (Modification[]));
      Modification[] mods = new Modification[0];
          try
          {
            // return 0 modifications if "history" is empty.
            if (history.Peek() == -1)
          return mods;

            mods = (Modification[]) serializer.Deserialize(history);
          }
          catch (InvalidOperationException e)
          {
        Log.Error(e);

            if (e.InnerException is XmlException)
          return mods;

            throw;
          }
            var results = new List<Modification>();

          foreach (Modification mod in mods)
          {
            if ((mod.ModifiedTime >= from) & (mod.ModifiedTime <= to))
              results.Add(mod);
          }
          return results.ToArray();
        }

    #endregion

        #region Internal methods
        // None yet.
        #endregion
    }
}