COA.EnterpriseServices/COA.EnterpriseServices.DataAccess/IDataAccess.cs

using System;
using System.Collections.Generic;
using System.Linq.Expressions;

namespace COA.EnterpriseServices.DataAccess
{
    public interface IDataAccess<T> where T : class, IRecord
    {
        /// <summary>
        /// Adds an item of type <typeparamref name="T"/> to the context
        /// </summary>
        /// <param name="item"></param>
        /// <returns></returns>
        bool Add(T item);

        /// <summary>
        /// Updates an item of type <typeparamref name="T"/> in the context
        /// </summary>
        /// <param name="item"></param>
        /// <returns></returns>
        bool Update(T item);

        /// <summary>
        /// Gets an item collection of type <typeparamref name="T"/> from the context
        /// </summary>
        /// <param name="query"></param>
        /// <returns></returns>
        ICollection<T> Get(Expression<Func<T, bool>> query);

        /// <summary>
        /// Allows support for invoking a raw command if supported by the instance
        /// </summary>
        /// <param name="command"></param>
        /// <param name="parameters"></param>
        /// <returns></returns>
        ICollection<T> Raw(string command, params object[] parameters);
    }
}