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//------------------------------------------------------------------------------
// <copyright file="IDQuery.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">[....]</owner>
//------------------------------------------------------------------------------
namespace MS.Internal.Xml.XPath {
using System;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Xsl;
using System.Diagnostics;
using System.Collections.Generic;
internal sealed class IDQuery : CacheOutputQuery {
public IDQuery(Query arg) : base(arg) {}
private IDQuery(IDQuery other) : base(other) { }
public override object Evaluate(XPathNodeIterator context) {
object argVal = base.Evaluate(context);
XPathNavigator contextNode = context.Current.Clone();
switch (GetXPathType(argVal)) {
case XPathResultType.NodeSet:
XPathNavigator temp;
while ((temp = input.Advance()) != null) {
ProcessIds(contextNode, temp.Value);
}
break;
case XPathResultType.String:
ProcessIds(contextNode, (string)argVal);
break;
case XPathResultType.Number:
ProcessIds(contextNode, StringFunctions.toString((double)argVal));
break;
case XPathResultType.Boolean:
ProcessIds(contextNode, StringFunctions.toString((bool)argVal));
break;
case XPathResultType_Navigator:
ProcessIds(contextNode, ((XPathNavigator)argVal).Value);
break;
}
return this;
}
void ProcessIds(XPathNavigator contextNode, string val) {
string[] ids = XmlConvert.SplitString(val);
for (int idx = 0; idx < ids.Length; idx++) {
if (contextNode.MoveToId(ids[idx])) {
Insert(outputBuffer, contextNode);
}
}
}
public override XPathNavigator MatchNode(XPathNavigator context) {
Evaluate(new XPathSingletonIterator(context, /*moved:*/true));
XPathNavigator result;
while ((result = Advance()) != null) {
if (result.IsSamePosition(context)) {
return context;
}
}
return null;
}
public override XPathNodeIterator Clone() { return new IDQuery(this); }
}
}
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