Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / XPath / Internal / BooleanExpr.cs / 1 / BooleanExpr.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace MS.Internal.Xml.XPath { using System; using System.Xml; using System.Xml.XPath; using System.Xml.Xsl; using System.Diagnostics; using System.Globalization; internal sealed class BooleanExpr : ValueQuery { private Query opnd1; private Query opnd2; private bool isOr; public BooleanExpr(Operator.Op op, Query opnd1, Query opnd2) { Debug.Assert(op == Operator.Op.AND || op == Operator.Op.OR); Debug.Assert(opnd1 != null && opnd2 != null); if (opnd1.StaticType != XPathResultType.Boolean) { opnd1 = new BooleanFunctions(Function.FunctionType.FuncBoolean, opnd1); } if (opnd2.StaticType != XPathResultType.Boolean) { opnd2 = new BooleanFunctions(Function.FunctionType.FuncBoolean, opnd2); } this.opnd1 = opnd1; this.opnd2 = opnd2; isOr = (op == Operator.Op.OR); } private BooleanExpr(BooleanExpr other) : base(other) { this.opnd1 = Clone(other.opnd1); this.opnd2 = Clone(other.opnd2); this.isOr = other.isOr; } public override void SetXsltContext(XsltContext context){ opnd1.SetXsltContext(context); opnd2.SetXsltContext(context); } public override object Evaluate(XPathNodeIterator nodeIterator) { object n1 = opnd1.Evaluate(nodeIterator); if (((bool) n1) == isOr) { return n1; } return opnd2.Evaluate(nodeIterator); } public override XPathNodeIterator Clone() { return new BooleanExpr(this); } public override XPathResultType StaticType { get { return XPathResultType.Boolean; } } public override void PrintQuery(XmlWriter w) { w.WriteStartElement(this.GetType().Name); w.WriteAttributeString("op", (isOr ? Operator.Op.OR : Operator.Op.AND).ToString()); opnd1.PrintQuery(w); opnd2.PrintQuery(w); w.WriteEndElement(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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