XmlCachedSequenceWriter.cs

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using System.Xml.XPath;
 
namespace System.Xml.Xsl.Runtime;
 
internal sealed class XmlCachedSequenceWriter : XmlSequenceWriter
{
    private readonly XmlQueryItemSequence _seqTyped;
 
    private XPathDocument _doc;
 
    private XmlRawWriter _writer;
 
    public XmlQueryItemSequence ResultSequence => _seqTyped;
 
    public XmlCachedSequenceWriter()
    {
        _seqTyped = new XmlQueryItemSequence();
    }
 
    public override XmlRawWriter StartTree(XPathNodeType rootType, IXmlNamespaceResolver nsResolver, XmlNameTable nameTable)
    {
        _doc = new XPathDocument(nameTable);
        _writer = _doc.LoadFromWriter(XPathDocument.LoadFlags.AtomizeNames | ((rootType != 0) ? XPathDocument.LoadFlags.Fragment : XPathDocument.LoadFlags.None), string.Empty);
        _writer.NamespaceResolver = nsResolver;
        return _writer;
    }
 
    public override void EndTree()
    {
        _writer.Close();
        _seqTyped.Add(_doc.CreateNavigator());
    }
 
    public override void WriteItem(XPathItem item)
    {
        _seqTyped.AddClone(item);
    }
}