lsst.afw ge482522685+b500e6e25f
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SchemaMapperImpl.h
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1// -*- lsst-c++ -*-
2#ifndef AFW_TABLE_DETAIL_SchemaMapperImpl_h_INCLUDED
3#define AFW_TABLE_DETAIL_SchemaMapperImpl_h_INCLUDED
4
5#include <map>
6#include <algorithm>
7
11
12namespace lsst {
13namespace afw {
14namespace table {
15
16class SchemaMapper;
17
18namespace detail {
19
26class SchemaMapperImpl final {
27private:
30 template <typename ...E>
31 static std::variant<std::pair<Key<E>, Key<E>>...> makeKeyPairVariantType(TypeList<E...>);
32
33public:
35 using KeyPairVariant = decltype(makeKeyPairVariantType(FieldTypes{}));
38
40 explicit SchemaMapperImpl(Schema const& input, Schema const& output) : _input(input), _output(output) {}
41
42private:
43 friend class table::SchemaMapper;
44 friend class detail::Access;
45
46 Schema _input;
47 Schema _output;
48 KeyPairMap _map;
49};
50} // namespace detail
51} // namespace table
52} // namespace afw
53} // namespace lsst
54
55#endif // !AFW_TABLE_DETAIL_SchemaMapperImpl_h_INCLUDED
A class used as a handle to a particular field in a table.
Definition: Key.h:53
Defines the fields and offsets for a table.
Definition: Schema.h:51
A mapping between the keys of two Schemas, used to copy data between them.
Definition: SchemaMapper.h:21
A private implementation class to hide the messy details of SchemaMapper.
decltype(makeKeyPairVariantType(FieldTypes{})) KeyPairVariant
A Variant type that can hold any one of the allowed pairx types.
SchemaMapperImpl(Schema const &input, Schema const &output)
Constructor from the given input and output schemas.