mcs/class/Microsoft.Build/Microsoft.Build.Internal/BuildTaskFactory.cs

   1 // BuildTaskFactory.cs
   2 //
   3 // Author:
   4 //   Atsushi Enomoto (atsushi@xamarin.com)
   5 //
   6 // Copyright (C) 2013 Xamarin Inc.
   7 //
   8 // Permission is hereby granted, free of charge, to any person obtaining
   9 // a copy of this software and associated documentation files (the
  10 // "Software"), to deal in the Software without restriction, including
  11 // without limitation the rights to use, copy, modify, merge, publish,
  12 // distribute, sublicense, and/or sell copies of the Software, and to
  13 // permit persons to whom the Software is furnished to do so, subject to
  14 // the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be
  17 // included in all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  23 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  24 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  25 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26 //
  27
  28 using System;
  29 using System.Threading;
  30 using System.Threading.Tasks;
  31 using System.Linq;
  32 using Microsoft.Build.Framework;
  33 using Microsoft.Build.Internal;
  34 using System.Collections.Generic;
  35 using Microsoft.Build.Execution;
  36
  37 namespace Microsoft.Build.Internal
  38 {
  39         class BuildTaskFactory
  40         {
  41                 public BuildTaskFactory (BuildTaskDatabase builtInDatabase, BuildTaskDatabase perProjectDatabase)
  42                 {
  43                         this.built_in_database = builtInDatabase;
  44                         this.per_project_database = perProjectDatabase;
  45                 }
  46
  47                 readonly BuildTaskDatabase built_in_database, per_project_database;
  48                 readonly List<ITaskFactory> task_factories = new List<ITaskFactory> ();
  49
  50                 public void ResetCaches ()
  51                 {
  52                         task_factories.Clear ();
  53                 }
  54
  55                 public ITask CreateTask (string name, IDictionary<string,string> factoryIdentityParameters, IBuildEngine engine)
  56                 {
  57                         Func<BuildTaskDatabase.TaskDescription,bool> fn = t => t.IsMatch (name);
  58                         var td = per_project_database.Tasks.FirstOrDefault (fn) ?? built_in_database.Tasks.FirstOrDefault (fn);
  59                         if (td == null)
  60                                 throw new InvalidOperationException (string.Format ("Task '{0}' could not be found", name));
  61                         if (td.TaskFactoryType != null) {
  62                                 var tf = task_factories.FirstOrDefault (f => f.GetType () == td.TaskFactoryType);
  63                                 if (tf == null) {
  64                                         tf = (ITaskFactory) Activator.CreateInstance (td.TaskFactoryType);
  65 #if NET_4_5
  66                                         var tf2 = tf as ITaskFactory2;
  67                                         if (tf2 != null)
  68                                                 tf2.Initialize (name, factoryIdentityParameters, td.TaskFactoryParameters, td.TaskBody, engine);
  69                                         else
  70 #endif
  71                                                 tf.Initialize (name, td.TaskFactoryParameters, td.TaskBody, engine);
  72                                         task_factories.Add (tf);
  73                                 }
  74                                 return tf.CreateTask (engine);
  75                         }
  76                         else
  77                                 return (ITask) Activator.CreateInstance (td.TaskType);
  78                 }
  79         }
  80 }
  81