1using System.Collections;
 2
 3namespace momoney.database.transactions
 4{
 5    public class Context : IContext
 6    {
 7        readonly IDictionary items;
 8
 9        public Context(IDictionary items)
10        {
11            this.items = items;
12        }
13
14        public bool contains<T>(IKey<T> key)
15        {
16            return key.is_found_in(items);
17        }
18
19        public void add<T>(IKey<T> key, T value)
20        {
21            key.add_value_to(items, value);
22        }
23
24        public T value_for<T>(IKey<T> key)
25        {
26            return key.parse_from(items);
27        }
28
29        public void remove<T>(IKey<T> key)
30        {
31            key.remove_from(items);
32        }
33    }
34}