65 lines
2.5 KiB
C#
65 lines
2.5 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="BooleanExpr.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// <owner current="true" primary="true">[....]</owner>
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//------------------------------------------------------------------------------
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namespace MS.Internal.Xml.XPath {
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using System;
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using System.Xml;
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using System.Xml.XPath;
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using System.Xml.Xsl;
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using System.Diagnostics;
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using System.Globalization;
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internal sealed class BooleanExpr : ValueQuery {
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private Query opnd1;
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private Query opnd2;
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private bool isOr;
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public BooleanExpr(Operator.Op op, Query opnd1, Query opnd2) {
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Debug.Assert(op == Operator.Op.AND || op == Operator.Op.OR);
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Debug.Assert(opnd1 != null && opnd2 != null);
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if (opnd1.StaticType != XPathResultType.Boolean) {
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opnd1 = new BooleanFunctions(Function.FunctionType.FuncBoolean, opnd1);
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}
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if (opnd2.StaticType != XPathResultType.Boolean) {
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opnd2 = new BooleanFunctions(Function.FunctionType.FuncBoolean, opnd2);
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}
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this.opnd1 = opnd1;
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this.opnd2 = opnd2;
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isOr = (op == Operator.Op.OR);
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}
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private BooleanExpr(BooleanExpr other) : base(other) {
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this.opnd1 = Clone(other.opnd1);
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this.opnd2 = Clone(other.opnd2);
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this.isOr = other.isOr;
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}
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public override void SetXsltContext(XsltContext context){
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opnd1.SetXsltContext(context);
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opnd2.SetXsltContext(context);
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}
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public override object Evaluate(XPathNodeIterator nodeIterator) {
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object n1 = opnd1.Evaluate(nodeIterator);
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if (((bool) n1) == isOr) {
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return n1;
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}
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return opnd2.Evaluate(nodeIterator);
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}
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public override XPathNodeIterator Clone() { return new BooleanExpr(this); }
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public override XPathResultType StaticType { get { return XPathResultType.Boolean; } }
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public override void PrintQuery(XmlWriter w) {
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w.WriteStartElement(this.GetType().Name);
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w.WriteAttributeString("op", (isOr ? Operator.Op.OR : Operator.Op.AND).ToString());
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opnd1.PrintQuery(w);
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opnd2.PrintQuery(w);
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w.WriteEndElement();
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}
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}
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}
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