mcs/nant/src/TaskBuilder.cs

   1 // NAnt - A .NET build tool
   2 // Copyright (C) 2001 Gerry Shaw
   3 //
   4 // This program is free software; you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation; either version 2 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // This program is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with this program; if not, write to the Free Software
  16 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17 //
  18 // Gerry Shaw (gerry_shaw@yahoo.com)
  19
  20 namespace SourceForge.NAnt {
  21
  22     using System;
  23     using System.Reflection;
  24
  25     public class TaskBuilder {
  26
  27         string _className;
  28         string _assemblyFileName;
  29         string _taskName;
  30
  31         public TaskBuilder(string className)
  32             : this(className, null) {
  33         }
  34
  35         public TaskBuilder(string className, string assemblyFileName) {
  36             _className = className;
  37             _assemblyFileName = assemblyFileName;
  38
  39             // get task name from attribute
  40             Assembly assembly = GetAssembly();
  41             TaskNameAttribute taskNameAttribute = (TaskNameAttribute) Attribute.GetCustomAttribute(assembly.GetType(ClassName), typeof(TaskNameAttribute));
  42             _taskName = taskNameAttribute.Name;
  43         }
  44
  45         public string ClassName {
  46             get { return _className; }
  47         }
  48
  49         public string AssemblyFileName {
  50             get { return _assemblyFileName; }
  51         }
  52
  53         public string TaskName {
  54             get { return _taskName; }
  55         }
  56
  57         private Assembly GetAssembly() {
  58             Assembly assembly;
  59             if (AssemblyFileName == null) {
  60                 assembly = Assembly.GetExecutingAssembly();
  61             } else {
  62                 assembly = Assembly.LoadFrom(AssemblyFileName);
  63             }
  64             return assembly;
  65         }
  66
  67         public Task CreateTask(Project project, Target target) {
  68             Task task;
  69             try {
  70                 Assembly assembly = GetAssembly();
  71
  72                 // create instance (ignore case)
  73                 task = (Task) assembly.CreateInstance(ClassName, true);
  74
  75                 // set default values
  76                 task.Project = project;
  77                 task.Target = target;
  78             } catch (Exception) {
  79                 task = null;
  80             }
  81             return task;
  82         }
  83     }
  84 }