/// <summary>
/// Resolves a mapping created from type TFrom to type TTo.
/// </summary>
/// <typeparam name="TTo">The requested mapping result</typeparam>
/// <typeparam name="TFrom">The input type</typeparam>
/// <param name="from">The input object, TFrom</param>
/// <returns>A type TTo object, in case mapping was successful</returns>
public TTo MapTo <TTo, TFrom>(TFrom from)
where TTo : class
where TFrom : class
{
var fromType = typeof(TFrom);
var toType = typeof(TTo);
var key = new MappingKey
{
From = fromType,
To = toType
};
if (!mappings.ContainsKey(key))
{
throw new NotSupportedException($"Mapping from {fromType.Name} to {toType.Name} not supported.");
}
var mapping = mappings[key];
var mapped = mapping(from);
if (mapped == null)
{
throw new NotSupportedException($"Mapping resulted in null for {fromType.Name} to {toType.Name}.");
}
if (!(mapped is TTo))
{
throw new NotSupportedException($"Mapping resulted in not supported result for {fromType.Name} to {toType.Name}.");
}
return(mapped as TTo);
}
/// <summary>
/// Use this function to create a map from type A to type B
/// </summary>
/// <typeparam name="TFrom">Type A</typeparam>
/// <typeparam name="TTo">Type B</typeparam>
/// <param name="mapping">The actual mapping code</param>
public Mapping <TFrom, TTo> CreateMap <TFrom, TTo>(Func <TFrom, Mapper, TTo> mapping) where TFrom : class
where TTo : class
{
var fromType = typeof(TFrom);
var toType = typeof(TTo);
var key = new MappingKey
{
From = fromType,
To = toType
};
if (mappings.ContainsKey(key))
{
throw new NotSupportedException($"Mapping from {fromType.Name} to {toType.Name} already in registry.");
}
//func translation
object mappingFunction(object a) => mapping(a as TFrom, this);
mappings.Add(key, mappingFunction);
return(new Mapping <TFrom, TTo>(mapping));
}