AspectSharp/AspectSharp.Lang/Steps/Context.cs

   1 // Copyright 2004-2008 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace AspectSharp.Lang.Steps
  16 {
  17         using System;
  18         using System.ComponentModel;
  19
  20         using AspectSharp.Lang.AST;
  21
  22         public delegate void ErrorDelegate( LexicalInfo info, String message );
  23
  24         /// <summary>
  25         /// Summary description for Context.
  26         /// </summary>
  27         public class Context
  28         {
  29                 private object ErrorEvent = new object();
  30                 private bool _hasErrors = false;
  31                 private EventHandlerList _events;
  32
  33                 public Context()
  34                 {
  35                         _events = new EventHandlerList();
  36                 }
  37
  38                 private void SetHasError()
  39                 {
  40                         _hasErrors = true;
  41                 }
  42
  43                 public bool HasErrors
  44                 {
  45                         get { return _hasErrors; }
  46                 }
  47
  48                 public event ErrorDelegate Error
  49                 {
  50                         add { _events.AddHandler(ErrorEvent, value); }
  51                         remove { _events.RemoveHandler(ErrorEvent, value); }
  52                 }
  53
  54                 public void RaiseErrorEvent( LexicalInfo info, String message )
  55                 {
  56                         SetHasError();
  57
  58                         ErrorDelegate errorDelegate = (ErrorDelegate) _events[ErrorEvent];
  59
  60                         if (errorDelegate != null)
  61                         {
  62                                 errorDelegate(info, message);
  63                         }
  64                 }
  65         }
  66 }