98 lines
3.0 KiB
C#
98 lines
3.0 KiB
C#
//
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// XslSortEvaluator.cs
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//
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// Author:
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// Atsushi Enomoto (atsushi@ximian.com)
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//
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// Copyright (C) 2006 Novell, Inc. http://www.novell.com
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//
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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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//
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//
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// This class handles xsl:sort to have XslTransformProcessor involved in
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// the evaluation of resulting nodeset. Beyond XPathExpression.AddSort(),
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// it handles current() by having .
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//
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using System;
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using System.Collections;
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using System.Xml;
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using System.Xml.XPath;
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namespace Mono.Xml.Xsl
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{
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class XslSortEvaluator
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{
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public XslSortEvaluator (XPathExpression select, Sort [] sorterTemplates)
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{
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this.select = select;
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this.sorterTemplates = sorterTemplates;
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PopulateConstantSorters ();
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sortRunner = new XPathSorters ();
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}
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XPathExpression select;
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Sort [] sorterTemplates;
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XPathSorter [] sorters;
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XPathSorters sortRunner;
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bool isSorterContextDependent;
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void PopulateConstantSorters ()
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{
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sorters = new XPathSorter [sorterTemplates.Length];
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for (int i = 0; i < sorterTemplates.Length; i++) {
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Sort sort = sorterTemplates [i];
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if (sort.IsContextDependent)
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isSorterContextDependent = true;
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else
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sorters [i] = sort.ToXPathSorter (null);
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}
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}
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public BaseIterator SortedSelect (XslTransformProcessor p)
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{
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if (isSorterContextDependent) {
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for (int i = 0; i < sorters.Length; i++)
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if (sorterTemplates [i].IsContextDependent)
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sorters [i] = sorterTemplates [i].ToXPathSorter (p);
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}
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BaseIterator iter = (BaseIterator) p.Select (select);
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p.PushNodeset (iter);
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p.PushForEachContext ();
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ArrayList list = new ArrayList (iter.Count);
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while (iter.MoveNext ()) {
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XPathSortElement item = new XPathSortElement ();
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item.Navigator = iter.Current.Clone ();
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item.Values = new object [sorters.Length];
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for (int i = 0; i < sorters.Length; i++)
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item.Values [i] = sorters [i].Evaluate (iter);
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list.Add (item);
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}
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p.PopForEachContext ();
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p.PopNodeset ();
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sortRunner.CopyFrom (sorters);
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return sortRunner.Sort (list, iter.NamespaceManager);
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}
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}
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}
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