XmlILCommand.cs

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using System.Xml.Xsl.Runtime;
 
namespace System.Xml.Xsl;
 
internal sealed class XmlILCommand
{
    private readonly ExecuteDelegate _delExec;
 
    private readonly XmlQueryStaticData _staticData;
 
    public XmlQueryStaticData StaticData => _staticData;
 
    public XmlILCommand(ExecuteDelegate delExec, XmlQueryStaticData staticData)
    {
        _delExec = delExec;
        _staticData = staticData;
    }
 
    public void Execute(object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlWriter writer)
    {
        try
        {
            if (writer is XmlAsyncCheckWriter)
            {
                writer = ((XmlAsyncCheckWriter)writer).CoreWriter;
            }
            if (writer is XmlWellFormedWriter { RawWriter: not null, WriteState: WriteState.Start } xmlWellFormedWriter && xmlWellFormedWriter.Settings.ConformanceLevel != ConformanceLevel.Document)
            {
                Execute(defaultDocument, dataSources, argumentList, new XmlMergeSequenceWriter(xmlWellFormedWriter.RawWriter));
            }
            else
            {
                Execute(defaultDocument, dataSources, argumentList, new XmlMergeSequenceWriter(new XmlRawWriterWrapper(writer)));
            }
        }
        finally
        {
            writer.Flush();
        }
    }
 
    private void Execute(object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlSequenceWriter results)
    {
        if (dataSources == null)
        {
            dataSources = XmlNullResolver.Singleton;
        }
        _delExec(new XmlQueryRuntime(_staticData, defaultDocument, dataSources, argumentList, results));
    }
}