using System;
using System.Collections.Generic;

namespace Deltares.Maps
{
    public interface IReader<TObject>
    {
        IEnumerable<TObject> Read();
    }

    public interface IFileReader<TFile, TObject> : IReader<TObject>
    {
        TFile File { get; }
    }

    public abstract class FileReader<TFile, TObject> : IFileReader<TFile, TObject>
        // note: restricted to geometry stuff for now, this can change in the future
        where TFile : class, IFile
        where TObject : IFeature
    {
        private readonly TFile file;

        protected FileReader(TFile file)
        {
            if (file == null)
            {
                throw new ArgumentNullException("file");
            }

            this.file = file;
        }

        #region Implementation of IFileReader<TFile,TObject>

        public TFile File
        {
            get { return file; }
        }

        public abstract IEnumerable<TObject> Read();

        #endregion
    }
}