mcs/class/System/System.Diagnostics/TextWriterTraceListener.cs

   1 //
   2 // System.Diagnostics.TextWriterTraceListener.cs
   3 //
   4 // Comments from John R. Hicks <angryjohn69@nc.rr.com> original implementation
   5 // can be found at: /mcs/docs/apidocs/xml/en/System.Diagnostics
   6 //
   7 // Authors:
   8 //   Jonathan Pryor (jonpryor@vt.edu)
   9 //
  10 // (C) 2002 Jonathan Pryor
  11 //
  12
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System;
  35 using System.IO;
  36 using System.Diagnostics;
  37
  38 namespace System.Diagnostics {
  39
  40         public class TextWriterTraceListener : TraceListener {
  41
  42                 private TextWriter writer;
  43
  44                 public TextWriterTraceListener () : base ("TextWriter")
  45                 {
  46                 }
  47
  48                 public TextWriterTraceListener (Stream stream)
  49                         : this (stream, "")
  50                 {
  51                 }
  52
  53                 public TextWriterTraceListener (string fileName)
  54                         : this (fileName, "")
  55                 {
  56                 }
  57
  58                 public TextWriterTraceListener (TextWriter writer)
  59                         : this (writer, "")
  60                 {
  61                 }
  62
  63                 public TextWriterTraceListener (Stream stream, string name)
  64                         : base (name != null ? name : "")
  65                 {
  66                         if (stream == null)
  67                                 throw new ArgumentNullException ("stream");
  68                         writer = new StreamWriter (stream);
  69                 }
  70
  71                 public TextWriterTraceListener (string fileName, string name)
  72                         : base (name != null ? name : "")
  73                 {
  74                         if (fileName == null)
  75                                 throw new ArgumentNullException ("fileName");
  76                         writer = File.AppendText (fileName);
  77                 }
  78
  79                 public TextWriterTraceListener (TextWriter writer, string name)
  80                         : base (name != null ? name : "")
  81                 {
  82                         if (writer == null)
  83                                 throw new ArgumentNullException ("writer");
  84                         this.writer = writer;
  85                 }
  86
  87                 public TextWriter Writer {
  88                         get {return writer;}
  89                         set {writer = value;}
  90                 }
  91
  92                 public override void Close ()
  93                 {
  94                         if (writer != null) {
  95                                 writer.Flush ();
  96                                 writer.Close ();
  97                                 writer = null;
  98                         }
  99                 }
 100
 101                 protected override void Dispose (bool disposing)
 102                 {
 103                         if (disposing)
 104                                 Close ();
 105
 106                         base.Dispose (disposing);
 107                 }
 108
 109                 public override void Flush ()
 110                 {
 111                         if (writer != null)
 112                                 writer.Flush ();
 113                 }
 114
 115                 public override void Write (string message)
 116                 {
 117                         if (writer != null) {
 118                                 if (NeedIndent)
 119                                         WriteIndent ();
 120                                 writer.Write (message);
 121                         }
 122                 }
 123
 124                 public override void WriteLine (string message)
 125                 {
 126                         if (writer != null) {
 127                                 if (NeedIndent)
 128                                         WriteIndent ();
 129                                 writer.WriteLine (message);
 130                                 NeedIndent = true;
 131                         }
 132                 }
 133         }
 134 }
 135