1using System;
 2using gorilla.utility;
 3
 4namespace solidware.financials.service.domain
 5{
 6    public class Entity : IEquatable<Entity>, Identifiable<Guid>
 7    {
 8        protected Entity()
 9        {
10            id = Id<Guid>.Default;
11        }
12
13        public virtual Id<Guid> id { get; set; }
14
15        public virtual bool Equals(Entity other)
16        {
17            if (ReferenceEquals(null, other)) return false;
18            if (ReferenceEquals(this, other)) return true;
19            if (id.Equals(Id<Guid>.Default) || other.id.Equals(Id<Guid>.Default)) return false;
20            return other.id.Equals(id);
21        }
22
23        public override bool Equals(object obj)
24        {
25            if (ReferenceEquals(null, obj)) return false;
26            if (ReferenceEquals(this, obj)) return true;
27            if (!(obj is Entity)) return false;
28            return Equals((Entity) obj);
29        }
30
31        public override int GetHashCode()
32        {
33            return id.GetHashCode();
34        }
35
36        static public bool operator ==(Entity left, Entity right)
37        {
38            return Equals(left, right);
39        }
40
41        static public bool operator !=(Entity left, Entity right)
42        {
43            return !Equals(left, right);
44        }
45    }
46}