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LSST Data Management Base Package
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IdFactory.cc
Go to the documentation of this file.
1#include <memory>
2#include "boost/format.hpp"
3
6
7namespace lsst {
8namespace afw {
9namespace table {
10
11namespace {
12
13class SimpleIdFactory : public IdFactory {
14public:
15 RecordId operator()() override { return ++_current; }
16
17 void notify(RecordId id) override { _current = id; }
18
19 std::shared_ptr<IdFactory> clone() const override { return std::make_shared<SimpleIdFactory>(*this); }
20
21 SimpleIdFactory() {}
22
23private:
24 RecordId _current{0};
25};
26
27class SourceIdFactory : public IdFactory {
28public:
29 RecordId operator()() override {
30 if (++_lower & _upperMask) {
31 --_lower;
32 throw LSST_EXCEPT(pex::exceptions::LengthError,
33 (boost::format("Next ID '%s' is too large for the number of reserved bits") %
34 (_lower + 1))
35 .str());
36 }
37 return _upper | _lower;
38 }
39
40 void notify(RecordId id) override {
41 RecordId newLower = id & (~_upper); // chop off the exact exposure ID
42 if (newLower & _upperMask) {
43 throw LSST_EXCEPT(
44 pex::exceptions::InvalidParameterError,
45 (boost::format("Explicit ID '%s' does not have the correct form.") % newLower).str());
46 }
47 _lower = newLower;
48 }
49
50 std::shared_ptr<IdFactory> clone() const override { return std::make_shared<SourceIdFactory>(*this); }
51
52 SourceIdFactory(RecordId expId, int reserved)
53 : _upper(expId << reserved),
54 _upperMask(std::numeric_limits<RecordId>::max() << reserved),
55 _lower(0) {
56 if (_upper >> reserved != expId) {
57 throw LSST_EXCEPT(pex::exceptions::InvalidParameterError,
58 (boost::format("Exposure ID '%s' is too large.") % expId).str());
59 }
60 }
61
62private:
63 RecordId const _upper;
64 RecordId const _upperMask;
65 RecordId _lower;
66};
67
68} // namespace
69
70std::shared_ptr<IdFactory> IdFactory::makeSimple() { return std::make_shared<SimpleIdFactory>(); }
71
73 return std::make_shared<SourceIdFactory>(expId, reserved);
74}
75} // namespace table
76} // namespace afw
77} // namespace lsst
int max
table::Key< int > id
Definition Detector.cc:162
#define LSST_EXCEPT(type,...)
Create an exception with a given type.
Definition Exception.h:48
Tag types used to declare specialized field types.
Definition misc.h:31
static std::shared_ptr< IdFactory > makeSimple()
Return a simple IdFactory that simply counts from 1.
Definition IdFactory.cc:70
static std::shared_ptr< IdFactory > makeSource(RecordId expId, int reserved)
Return an IdFactory that includes another, fixed ID in the higher-order bits.
Definition IdFactory.cc:72
std::int64_t RecordId
Type used for unique IDs for records.
Definition misc.h:21
STL namespace.