2 // ConditionFactorExpression.cs
5 // Marek Sieradzki (marek.sieradzki@gmail.com)
7 // (C) 2006 Marek Sieradzki
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:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
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.
29 using System.Collections;
30 using System.Collections.Specialized;
31 using System.Globalization;
34 namespace Microsoft.Build.BuildEngine {
35 internal sealed class ConditionFactorExpression : ConditionExpression {
39 static Hashtable allValues;
40 static Hashtable trueValues;
41 static Hashtable falseValues;
43 static ConditionFactorExpression ()
45 string[] trueValuesArray = new string[] {"true", "on", "yes"};
46 string[] falseValuesArray = new string[] {"false", "off", "no"};
49 allValues = CollectionsUtil.CreateCaseInsensitiveHashtable ();
50 trueValues = CollectionsUtil.CreateCaseInsensitiveHashtable ();
51 falseValues = CollectionsUtil.CreateCaseInsensitiveHashtable ();
53 foreach (string s in trueValuesArray) {
54 trueValues.Add (s, s);
58 foreach (string s in falseValuesArray) {
59 falseValues.Add (s, s);
64 public ConditionFactorExpression (Token token)
69 public override bool BoolEvaluate (Project context)
71 Token evaluatedToken = EvaluateToken (token, context);
73 if (trueValues [evaluatedToken.Value] != null)
75 else if (falseValues [evaluatedToken.Value] != null)
78 throw new ExpressionEvaluationException (
79 String.Format ("Expression \"{0}\" evaluated to \"{1}\" instead of a boolean value",
80 token.Value, evaluatedToken.Value));
83 public override float NumberEvaluate (Project context)
85 Token evaluatedToken = EvaluateToken (token, context);
87 return Single.Parse (evaluatedToken.Value, CultureInfo.InvariantCulture);
90 public override string StringEvaluate (Project context)
92 Token evaluatedToken = EvaluateToken (token, context);
94 return evaluatedToken.Value;
97 // FIXME: check if we really can do it
98 public override bool CanEvaluateToBool (Project context)
100 Token evaluatedToken = EvaluateToken (token, context);
102 if (token.Type == TokenType.String && allValues [evaluatedToken.Value] != null)
108 public override bool CanEvaluateToNumber (Project context)
110 if (token.Type == TokenType.Number)
116 public override bool CanEvaluateToString (Project context)
121 // FIXME: in some situations items might not be allowed
122 static Token EvaluateToken (Token token, Project context)
124 Expression oe = new Expression ();
125 oe.Parse (token.Value, ParseOptions.AllowItemsMetadataAndSplit);
126 return new Token ((string) oe.ConvertTo (context, typeof (string)), token.Type, token.Position);