XmlSortKey.cs

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namespace System.Xml.Xsl.Runtime;
 
internal abstract class XmlSortKey : IComparable
{
    private int _priority;
 
    private XmlSortKey _nextKey;
 
    public int Priority
    {
        set
        {
            for (XmlSortKey xmlSortKey = this; xmlSortKey != null; xmlSortKey = xmlSortKey._nextKey)
            {
                xmlSortKey._priority = value;
            }
        }
    }
 
    public XmlSortKey AddSortKey(XmlSortKey sortKey)
    {
        if (_nextKey != null)
        {
            _nextKey.AddSortKey(sortKey);
        }
        else
        {
            _nextKey = sortKey;
        }
        return this;
    }
 
    protected int BreakSortingTie(XmlSortKey that)
    {
        if (_nextKey != null)
        {
            return _nextKey.CompareTo(that._nextKey);
        }
        if (_priority >= that._priority)
        {
            return 1;
        }
        return -1;
    }
 
    protected int CompareToEmpty(object obj)
    {
        XmlEmptySortKey xmlEmptySortKey = obj as XmlEmptySortKey;
        if (!xmlEmptySortKey.IsEmptyGreatest)
        {
            return 1;
        }
        return -1;
    }
 
    public abstract int CompareTo(object that);
}