// 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)
        {
            ArgumentNullException.ThrowIfNull(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;
    }
}