mcs/class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/ItemReference.cs

   1 //
   2 // ItemReference.cs: Represents "@(Reference)" in expression.
   3 //
   4 // Author:
   5 //   Marek Sieradzki (marek.sieradzki@gmail.com)
   6 //   Ankit Jain (jankit@novell.com)
   7 //
   8 // (C) 2005 Marek Sieradzki
   9 // Copyright 2009 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29
  30 using System;
  31 using System.Collections;
  32 using Microsoft.Build.Framework;
  33
  34 namespace Microsoft.Build.BuildEngine {
  35         internal class ItemReference : IReference {
  36
  37                 string          itemName;
  38                 Expression      transform;
  39                 Expression      separator;
  40                 int             start;
  41                 int             length;
  42                 string          original_string;
  43
  44                 public ItemReference (string original_string, string itemName, string transform, string separator, int start, int length)
  45                 {
  46                         this.itemName = itemName;
  47                         this.start = start;
  48                         this.length = length;
  49                         this.original_string = original_string;
  50
  51                         // Transform and separator are never expanded for item refs
  52                         if (transform != null) {
  53                                 this.transform = new Expression ();
  54                                 this.transform.Parse (transform, ParseOptions.AllowMetadata | ParseOptions.Split);
  55                         }
  56
  57                         if (separator != null) {
  58                                 this.separator = new Expression ();
  59                                 this.separator.Parse (separator, ParseOptions.Split);
  60                         }
  61                 }
  62
  63                 // when evaluating property, allowItems=false, so,
  64                 // ItemRef will _not_ get created, so this wont get hit
  65                 // when evaluating items, expand: true
  66                 // other cases, expand: true
  67                 public string ConvertToString (Project project, ExpressionOptions options)
  68                 {
  69                         BuildItemGroup group;
  70                         if (project.TryGetEvaluatedItemByNameBatched (itemName, out group))
  71                                 return group.ConvertToString (transform, separator, options);
  72                         else
  73                                 return String.Empty;
  74                 }
  75
  76                 public ITaskItem [] ConvertToITaskItemArray (Project project, ExpressionOptions options)
  77                 {
  78                         BuildItemGroup group;
  79                         if (project.TryGetEvaluatedItemByNameBatched (itemName, out group))
  80                                 return group.ConvertToITaskItemArray (transform, separator, options);
  81                         else
  82                                 return null;
  83                 }
  84
  85                 public string ItemName {
  86                         get { return itemName; }
  87                 }
  88
  89                 public Expression Transform {
  90                         get { return transform; }
  91                 }
  92
  93                 public Expression Separator {
  94                         get { return separator; }
  95                 }
  96
  97                 public string OriginalString {
  98                         get { return original_string; }
  99                 }
 100
 101                 public int Start {
 102                         get { return start; }
 103                 }
 104
 105                 public int End {
 106                         get { return start + length - 1; }
 107                 }
 108
 109                 public override string ToString ()
 110                 {
 111                         return original_string;
 112                 }
 113         }
 114 }