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LSSTDataManagementBasePackage
Access.h
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1 // -*- lsst-c++ -*-
2 #ifndef AFW_TABLE_DETAIL_Access_h_INCLUDED
3 #define AFW_TABLE_DETAIL_Access_h_INCLUDED
4 
5 #include <cstring>
6 
7 #include "ndarray/Manager.h"
11 
12 namespace lsst {
13 namespace afw {
14 namespace table {
15 
16 class BaseRecord;
17 class BaseTable;
18 
19 namespace detail {
20 
31 class Access final {
32 public:
34  template <typename T>
36  if (!static_cast<Key<T> const &>(kb).isValid()) {
37  throw LSST_EXCEPT(
40  "Cannot extract subfield key from invalid key of type '%s' "
41  "(most often this is caused by failing to setup centroid or shape slots)") %
43  .str());
44  }
45  return Key<typename Key<T>::Element>(static_cast<Key<T> const &>(kb).getOffset() +
46  n * sizeof(typename Key<T>::Element));
47  }
48 
50  template <typename T>
51  static Key<Array<T> > extractRange(KeyBase<Array<T> > const &kb, int begin, int end) {
52  if (!static_cast<Key<Array<T> > const &>(kb).isValid()) {
54  (boost::format("Cannot extract subfield key from invalid key of type '%s' ") %
56  .str());
57  }
58  return Key<Array<T> >(static_cast<Key<Array<T> > const &>(kb).getOffset() +
59  begin * sizeof(typename Key<T>::Element),
60  end - begin);
61  }
62 
64  template <typename T>
65  static Key<T> makeKey(int offset) {
66  return Key<T>(offset);
67  }
68 
70  template <typename T>
71  static Key<T> makeKey(Field<T> const &field, int offset) {
72  return Key<T>(offset, field);
73  }
74 
76  static Key<Flag> makeKey(int offset, int bit) { return Key<Flag>(offset, bit); }
77 
79  static Key<std::string> makeKeyString(int offset, int size) { return Key<std::string>(offset, size); }
80 
82  template <typename T>
83  static Key<Array<T>> makeKeyArray(int offset, int size) {
84  return Key<Array<T>>(offset, size);
85  }
86 
88  static void padSchema(Schema &schema, int bytes) {
89  schema._edit();
90  schema._impl->_recordSize += bytes;
91  }
92 };
93 } // namespace detail
94 } // namespace table
95 } // namespace afw
96 } // namespace lsst
97 
98 #endif // !AFW_TABLE_DETAIL_Access_h_INCLUDED
Defines the fields and offsets for a table.
Definition: Schema.h:50
static Key< Array< T > > extractRange(KeyBase< Array< T > > const &kb, int begin, int end)
Definition: Access.h:51
static void padSchema(Schema &schema, int bytes)
Definition: Access.h:88
table::Key< int > field
Definition: ApCorrMap.cc:77
static Key< std::string > makeKeyString(int offset, int size)
Definition: Access.h:79
static Key< T > makeKey(int offset)
Definition: Access.h:65
static Key< T > makeKey(Field< T > const &field, int offset)
Definition: Access.h:71
A base class for image defects.
bool isValid
Definition: fits.cc:380
static Key< typename Key< T >::Element > extractElement(KeyBase< T > const &kb, int n)
Definition: Access.h:35
def format(config, name=None, writeSourceLine=True, prefix="", verbose=False)
Definition: history.py:168
A description of a field in a table.
Definition: Field.h:24
static Key< Flag > makeKey(int offset, int bit)
Definition: Access.h:76
table::Schema schema
Definition: Camera.cc:161
Tag types used to declare specialized field types.
Definition: misc.h:32
Reports errors in the logical structure of the program.
Definition: Runtime.h:46
static Key< Array< T > > makeKeyArray(int offset, int size)
Definition: Access.h:83
T Element
the type of subfields (the same as the type itself for scalars)
Definition: FieldBase.h:47
#define LSST_EXCEPT(type,...)
Create an exception with a given type.
Definition: Exception.h:48
A base class for Key that allows subfield keys to be extracted for some field types.
Definition: KeyBase.h:20
A class used as a handle to a particular field in a table.
Definition: fwd.h:45
Key specialization for Flag.
Definition: Flag.h:94
table::Key< table::Array< std::uint8_t > > bytes
Definition: Transform.cc:199
int end