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namespace Utils
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{
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public class Mapper<T, U> where T : class
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where U : class
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{
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readonly HashSet<Tuple<T, U>> mapper = new HashSet<Tuple<T, U>>();
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public void Reset()
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{
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mapper.Clear();
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}
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public T GetT(U entity)
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{
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var result = mapper.Where(tuple => ReferenceEquals(tuple.Item2, entity));
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if (result.Count() != 1)
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{
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return null;
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}
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return result.First().Item1;
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}
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public U GetU(T model)
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{
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var result = mapper.Where(tuple => ReferenceEquals(tuple.Item2, model));
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if (result.Count() != 1)
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{
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return null;
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}
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return result.First().Item2;
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}
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public bool AddMapping(T t, U u)
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{
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var mapping = new Tuple<T, U>(t, u);
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if (mapper.Contains(mapping)) return false;
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mapper.Add(mapping);
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return true;
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}
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}
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}
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