135 lines
4.0 KiB
C#
135 lines
4.0 KiB
C#
//
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// ConditionFactorExpression.cs
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//
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// Author:
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// Marek Sieradzki (marek.sieradzki@gmail.com)
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//
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// (C) 2006 Marek Sieradzki
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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using System;
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using System.Collections;
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using System.Collections.Specialized;
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using System.Globalization;
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using System.Xml;
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namespace Microsoft.Build.BuildEngine {
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internal sealed class ConditionFactorExpression : ConditionExpression {
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readonly Token token;
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static Hashtable allValues;
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static Hashtable trueValues;
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static Hashtable falseValues;
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static ConditionFactorExpression ()
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{
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string[] trueValuesArray = new string[] {"true", "on", "yes"};
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string[] falseValuesArray = new string[] {"false", "off", "no"};
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allValues = CollectionsUtil.CreateCaseInsensitiveHashtable ();
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trueValues = CollectionsUtil.CreateCaseInsensitiveHashtable ();
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falseValues = CollectionsUtil.CreateCaseInsensitiveHashtable ();
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foreach (string s in trueValuesArray) {
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trueValues.Add (s, s);
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allValues.Add (s, s);
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}
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foreach (string s in falseValuesArray) {
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falseValues.Add (s, s);
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allValues.Add (s, s);
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}
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}
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public ConditionFactorExpression (Token token)
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{
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this.token = token;
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}
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public override bool BoolEvaluate (Project context)
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{
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Token evaluatedToken = EvaluateToken (token, context);
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if (trueValues [evaluatedToken.Value] != null)
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return true;
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else if (falseValues [evaluatedToken.Value] != null)
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return false;
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else
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throw new ExpressionEvaluationException (
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String.Format ("Expression \"{0}\" evaluated to \"{1}\" instead of a boolean value",
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token.Value, evaluatedToken.Value));
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}
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public override float NumberEvaluate (Project context)
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{
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Token evaluatedToken = EvaluateToken (token, context);
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return Single.Parse (evaluatedToken.Value, CultureInfo.InvariantCulture);
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}
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public override string StringEvaluate (Project context)
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{
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Token evaluatedToken = EvaluateToken (token, context);
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return evaluatedToken.Value;
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}
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// FIXME: check if we really can do it
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public override bool CanEvaluateToBool (Project context)
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{
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Token evaluatedToken = EvaluateToken (token, context);
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if (token.Type == TokenType.String && allValues [evaluatedToken.Value] != null)
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return true;
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else
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return false;
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}
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public override bool CanEvaluateToNumber (Project context)
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{
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if (token.Type == TokenType.Number)
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return true;
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else if (token.Type == TokenType.String) {
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var text = StringEvaluate (context);
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Single number;
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return Single.TryParse (text, out number);
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}
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else
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return false;
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}
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public override bool CanEvaluateToString (Project context)
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{
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return true;
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}
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// FIXME: in some situations items might not be allowed
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static Token EvaluateToken (Token token, Project context)
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{
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Expression oe = new Expression ();
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oe.Parse (token.Value, ParseOptions.AllowItemsMetadataAndSplit);
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return new Token ((string) oe.ConvertTo (context, typeof (string)), token.Type, token.Position);
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}
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}
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}
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