// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Runtime.Serialization;
using System.Xml;
 
namespace System.ServiceModel.Syndication
{
    [DataContract]
    public abstract class CategoriesDocumentFormatter
    {
        private CategoriesDocument _document;
 
        protected CategoriesDocumentFormatter()
        {
        }
 
        protected CategoriesDocumentFormatter(CategoriesDocument documentToWrite)
        {
            if (documentToWrite is null)
            {
                throw new ArgumentNullException(nameof(documentToWrite));
            }
 
            _document = documentToWrite;
        }
 
        public CategoriesDocument Document => _document;
 
        public abstract string Version { get; }
 
        public abstract bool CanRead(XmlReader reader);
        public abstract void ReadFrom(XmlReader reader);
        public abstract void WriteTo(XmlWriter writer);
 
        protected virtual InlineCategoriesDocument CreateInlineCategoriesDocument()
        {
            return new InlineCategoriesDocument();
        }
 
        protected virtual ReferencedCategoriesDocument CreateReferencedCategoriesDocument()
        {
            return new ReferencedCategoriesDocument();
        }
 
        protected virtual void SetDocument(CategoriesDocument document) => _document = document;
    }
}