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 //
   7 // (C) 2005 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;
  32 using Microsoft.Build.Framework;
  33 using Microsoft.Build.Utilities;
  34
  35 namespace Microsoft.Build.BuildEngine {
  36         internal class ItemReference {
  37
  38                 string          itemName;
  39                 string          separator;
  40                 Expression      parent;
  41                 Expression      transform;
  42
  43                 public ItemReference (Expression parent)
  44                 {
  45                         if (parent == null)
  46                                 throw new Exception ("Parent Expression needed to find project.");
  47                         this.parent = parent;
  48                         this.itemName = null;
  49                         this.separator = ";";
  50                 }
  51
  52                 public ItemReference (Expression parent, string source)
  53                         : this (parent)
  54                 {
  55                         ParseSource (source);
  56                 }
  57
  58                 public void ParseSource (string source)
  59                 {
  60                         string sourceWithoutParens;
  61                         ApostropheState aState = ApostropheState.Out;
  62                         ItemParsingState iState = ItemParsingState.Name;
  63                         int c = -1;
  64                         int itemNameEnd;
  65                         int transformEnd = -1;
  66                         int separatorStart = -1;
  67
  68                         if (source == null)
  69                                 throw new ArgumentNullException ("source");
  70
  71                         if (source.Length < 3)
  72                                 throw new ArgumentException ("Invalid item.");
  73
  74                         sourceWithoutParens = source.Substring (2, source.Length - 3);
  75                         itemNameEnd = sourceWithoutParens.Length - 1;
  76                         CharEnumerator it = sourceWithoutParens.GetEnumerator ();
  77
  78                         while (it.MoveNext ()) {
  79                                 c++;
  80                                 if (it.Current == '\'') {
  81                                         if (aState == ApostropheState.In)
  82                                                 aState = ApostropheState.Out;
  83                                         else
  84                                                 aState = ApostropheState.In;
  85                                 }
  86                                 if (it.Current == '-' && iState == ItemParsingState.Name && aState == ApostropheState.Out) {
  87                                         iState = ItemParsingState.Transform1;
  88                                         itemNameEnd = c - 1;
  89                                 } else if (it.Current == '>' && iState == ItemParsingState.Transform1 && aState == ApostropheState.Out) {
  90                                         iState = ItemParsingState.Transform2;
  91                                 } else if (iState == ItemParsingState.Transform2 && aState == ApostropheState.Out && c == sourceWithoutParens.Length - 1) {
  92                                         transformEnd = c;
  93                                 } else if (iState == ItemParsingState.Transform2 && aState == ApostropheState.Out && it.Current == ',') {
  94                                         transformEnd = c - 1;
  95                                         separatorStart = c + 1;
  96                                         break;
  97                                 } else if (iState == ItemParsingState.Name && aState == ApostropheState.Out && it.Current == ',') {
  98                                         separatorStart = c + 1;
  99                                         itemNameEnd = c - 1;
 100                                         break;
 101                                 }
 102                         }
 103                         itemName = sourceWithoutParens.Substring (0, itemNameEnd + 1);
 104                         if (transformEnd != -1) {
 105                                 if (separatorStart != -1) {
 106                                         separator = sourceWithoutParens.Substring (separatorStart + 1, sourceWithoutParens.Length
 107                                                 - separatorStart - 2);
 108                                         transform = new Expression (parent.Project, sourceWithoutParens.Substring (itemNameEnd + 4,
 109                                         transformEnd - itemNameEnd - 4));
 110                                 } else {
 111                                         transform = new Expression (parent.Project, sourceWithoutParens.Substring (itemNameEnd + 4,
 112                                         sourceWithoutParens.Length - itemNameEnd - 5));
 113                                 }
 114                         } else {
 115                                 if (separatorStart != -1) {
 116                                         separator = sourceWithoutParens.Substring (separatorStart + 1, sourceWithoutParens.Length
 117                                                 - separatorStart - 2);
 118                                 }
 119                         }
 120                 }
 121
 122                 public ITaskItem[] ToITaskItemArray ()
 123                 {
 124                         if (itemName != String.Empty) {
 125                                 Project p = parent.Project;
 126                                 BuildItemGroup big;
 127                                 if (p.EvaluatedItemsByName.Contains (itemName)) {
 128                                         big = (BuildItemGroup)p.EvaluatedItemsByName [itemName];
 129                                         return big.ToITaskItemArray (transform);
 130                                 } else
 131                                         return null;
 132                         } else
 133                                 return null;
 134                 }
 135
 136                 public new string ToString ()
 137                 {
 138                         if (itemName != String.Empty) {
 139                                 Project p = parent.Project;
 140                                 BuildItemGroup big;
 141                                 if (p.EvaluatedItemsByName.Contains (itemName)) {
 142                                         big = (BuildItemGroup)p.EvaluatedItemsByName [itemName];
 143                                         return big.ToString (transform, separator);
 144                                 } else
 145                                         return String.Empty;
 146                         } else
 147                                 return String.Empty;
 148                 }
 149
 150                 public string ItemName {
 151                         get { return itemName; }
 152                 }
 153
 154                 public string Separator {
 155                         get { return separator; }
 156                 }
 157         }
 158 }
 159
 160 #endif