Zero/ZeroLevel/Services/Specification/BaseSpecification.cs

using System;
using System.Runtime.Serialization;

namespace ZeroLevel.Specification
{
    [Serializable]
    [DataContract]
    public abstract class BaseSpecification<T> : ISpecification<T>
    {
        public abstract bool IsSatisfiedBy(T o);

        public ISpecification<T> And(ISpecification<T> specification)
        {
            return new AndSpecification<T>(this, specification);
        }

        public ISpecification<T> Or(ISpecification<T> specification)
        {
            return new OrSpecification<T>(this, specification);
        }

        public ISpecification<T> Not()
        {
            return new NotSpecification<T>(this);
        }
    }
}