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//
// XslSortEvaluator.cs
//
// Author:
// Atsushi Enomoto (atsushi@ximian.com)
//
// Copyright (C) 2006 Novell, Inc. http://www.novell.com
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//
// This class handles xsl:sort to have XslTransformProcessor involved in
// the evaluation of resulting nodeset. Beyond XPathExpression.AddSort(),
// it handles current() by having .
//
using System;
using System.Collections;
using System.Xml;
using System.Xml.XPath;
namespace Mono.Xml.Xsl
{
class XslSortEvaluator
{
public XslSortEvaluator (XPathExpression select, Sort [] sorterTemplates)
{
this.select = select;
this.sorterTemplates = sorterTemplates;
PopulateConstantSorters ();
sortRunner = new XPathSorters ();
}
XPathExpression select;
Sort [] sorterTemplates;
XPathSorter [] sorters;
XPathSorters sortRunner;
bool isSorterContextDependent;
void PopulateConstantSorters ()
{
sorters = new XPathSorter [sorterTemplates.Length];
for (int i = 0; i < sorterTemplates.Length; i++) {
Sort sort = sorterTemplates [i];
if (sort.IsContextDependent)
isSorterContextDependent = true;
else
sorters [i] = sort.ToXPathSorter (null);
}
}
public BaseIterator SortedSelect (XslTransformProcessor p)
{
if (isSorterContextDependent) {
for (int i = 0; i < sorters.Length; i++)
if (sorterTemplates [i].IsContextDependent)
sorters [i] = sorterTemplates [i].ToXPathSorter (p);
}
BaseIterator iter = (BaseIterator) p.Select (select);
p.PushNodeset (iter);
p.PushForEachContext ();
ArrayList list = new ArrayList (iter.Count);
while (iter.MoveNext ()) {
XPathSortElement item = new XPathSortElement ();
item.Navigator = iter.Current.Clone ();
item.Values = new object [sorters.Length];
for (int i = 0; i < sorters.Length; i++)
item.Values [i] = sorters [i].Evaluate (iter);
list.Add (item);
}
p.PopForEachContext ();
p.PopNodeset ();
sortRunner.CopyFrom (sorters);
return sortRunner.Sort (list, iter.NamespaceManager);
}
}
}
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