class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/ConditionFunctionExpression.cs

   1 //
   2 // ConditionFunctionExpression.cs
   3 //
   4 // Author:
   5 //   Marek Sieradzki (marek.sieradzki@gmail.com)
   6 //
   7 // (C) 2006 Marek Sieradzki
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27
  28 #if NET_2_0
  29
  30 using System;
  31 using System.Collections.Generic;
  32 using System.IO;
  33 using System.Reflection;
  34 using System.Xml;
  35
  36 namespace Microsoft.Build.BuildEngine {
  37         internal sealed class ConditionFunctionExpression : ConditionExpression {
  38
  39                 List <ConditionFactorExpression>        args;
  40                 string                                  name;
  41
  42                 static Dictionary <string, MethodInfo>  functions;
  43
  44                 static ConditionFunctionExpression ()
  45                 {
  46                         Type t = typeof (ConditionFunctionExpression);
  47                         string [] names = new string [] { "Exists", "HasTrailingSlash" };
  48
  49                         functions = new Dictionary <string, MethodInfo> ();
  50                         foreach (string name in names)
  51                                 functions.Add (name, t.GetMethod (name, BindingFlags.NonPublic | BindingFlags.Static));
  52                 }
  53
  54                 public ConditionFunctionExpression (string name, List <ConditionFactorExpression> args)
  55                 {
  56                         this.args = args;
  57                         this.name = name;
  58                 }
  59
  60                 public override  bool BoolEvaluate (Project context)
  61                 {
  62                         if (!functions.ContainsKey (name))
  63                                 throw new InvalidOperationException ();
  64
  65                         if (functions [name] == null)
  66                                 throw new InvalidOperationException ();
  67
  68                         MethodInfo mi = functions [name];
  69                         object [] argsArr = new object [args.Count + 1];
  70                         int i = 0;
  71                         foreach (ConditionFactorExpression cfe in args)
  72                                 argsArr [i++] = cfe.StringEvaluate (context);
  73                         argsArr [i] = context;
  74
  75                         return (bool) mi.Invoke (null, argsArr);
  76                 }
  77
  78                 public override float NumberEvaluate (Project context)
  79                 {
  80                         throw new NotSupportedException ();
  81                 }
  82
  83                 public override string StringEvaluate (Project context)
  84                 {
  85                         throw new NotSupportedException ();
  86                 }
  87
  88                 public override bool CanEvaluateToBool (Project context)
  89                 {
  90                         return functions.ContainsKey (name);
  91                 }
  92
  93                 public override bool CanEvaluateToNumber (Project context)
  94                 {
  95                         return false;
  96                 }
  97
  98                 public override bool CanEvaluateToString (Project context)
  99                 {
 100                         return false;
 101                 }
 102
 103 #pragma warning disable 0169
 104 #region Functions
 105                 // FIXME imported projects
 106                 static bool Exists (string file, Project context)
 107                 {
 108                         string directory  = null;
 109
 110                         if (context.FullFileName != String.Empty)
 111                                 directory = Path.GetDirectoryName (context.FullFileName);
 112
 113                         if (!Path.IsPathRooted (file) && directory != null && directory != String.Empty)
 114                                 file = Path.Combine (directory, file);
 115
 116                         return File.Exists (file) || Directory.Exists (file);
 117                 }
 118
 119                 static bool HasTrailingSlash (string file, Project context)
 120                 {
 121                         if (file == null)
 122                                 return false;
 123
 124                         file = file.Trim ();
 125
 126                         int len = file.Length;
 127                         if (len == 0)
 128                                 return false;
 129
 130                         return file [len - 1] == '\\' || file [len - 1] == '/';
 131                 }
 132
 133 #endregion
 134 #pragma warning restore 0169
 135
 136         }
 137 }
 138
 139 #endif