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NullProgressMonitor.cs

//
// NullProgressMonitor.cs
//
// Author:
//   Lluis Sanchez Gual
//
// Copyright (C) 2007 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//


using System;
using System.Collections;
using System.Threading;
using System.IO;

namespace Mono.Addins.Setup.ProgressMonitoring
{
      internal class NullProgressMonitor: MarshalByRefObject, IProgressMonitor
      {
            bool done, canceled;
            ArrayList errors;
            ArrayList warnings;
            ArrayList messages;
            
            public string[] Messages {
                  get {
                        if (messages != null)
                              return (string[]) messages.ToArray (typeof(string));
                        else
                              return new string [0];
                  }
            }
            
            public string[] Warnings {
                  get {
                        if (warnings != null)
                              return (string[]) warnings.ToArray (typeof(string));
                        else
                              return new string [0];
                  }
            }
            
            public ProgressError[] Errors {
                  get {
                        if (errors != null)
                              return (ProgressError[]) errors.ToArray (typeof(ProgressError));
                        else
                              return new ProgressError [0];
                  }
            }
            
            public virtual void BeginTask (string name, int totalWork)
            {
            }
            
            public virtual void EndTask ()
            {
            }
            
            public virtual void BeginStepTask (string name, int totalWork, int stepSize)
            {
            }
            
            public virtual void Step (int work)
            {
            }
            
            public virtual TextWriter Log {
                  get { return TextWriter.Null; }
            }
            
            public virtual void ReportSuccess (string message)
            {
                  if (messages == null)
                        messages = new ArrayList ();
                  messages.Add (message);
            }
            
            public virtual void ReportWarning (string message)
            {
                  if (warnings == null)
                        warnings = new ArrayList ();
                  messages.Add (message);
            }
            
            public virtual void ReportError (string message, Exception ex)
            {
                  if (errors == null)
                        errors = new ArrayList ();
                        
                  if (message == null && ex != null)
                        message = ex.Message;
                  else if (message != null && ex != null) {
                        if (!message.EndsWith (".")) message += ".";
                        message += " " + ex.Message;
                  }
                  
                  errors.Add (new ProgressError (message, ex));
            }
            
            public bool IsCancelRequested {
                  get { return canceled; }
            }
            
            public void Cancel ()
            {
                  canceled = true;
            }
            
            public virtual int LogLevel {
                  get { return 1; }
            }
            
            public virtual void Dispose ()
            {
                  lock (this) {
                        if (done) return;
                        done = true;
                  }
                  OnCompleted ();
            }
            
            protected virtual void OnCompleted ()
            {
            }
      }
      
      internal class ProgressError
      {
            Exception ex;
            string message;
            
            public ProgressError (string message, Exception ex)
            {
                  this.ex = ex;
                  this.message = message;
            }
            
            public string Message {
                  get { return message; }
            }
            
            public Exception Exception {
                  get { return ex; }            }
      }
}

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