private Mapper(Action <MappingInstructions> mapperBuilder)
{
_mappers = Algorithm.LazyIndexer <MapperKey, Action <object, object> >(key =>
{
var instructions = new MappingInstructions(key.SourceType, key.DestType);
mapperBuilder(instructions);
return(GenerateMapper(instructions));
},
new MapperKeyEqualityComparer());
}
private static Action <object, object> GenerateMapper(MappingInstructions instructions)
{
var dm = new DynamicMethod(
"Map" + instructions.SourceType.Name + "To" + instructions.SourceType.Name + Interlocked.Increment(ref _nextMapperId),
typeof(void),
new[] { typeof(object), typeof(object) },
true);
var ilGen = dm.GetILGenerator();
foreach (var mapping in instructions.GetMappings())
{
mapping.GenerateMap(ilGen, 0, 1);
}
ilGen.Emit(OpCodes.Ret);
return((Action <object, object>)dm.CreateDelegate(typeof(Action <object, object>)));
}
