LSST Applications  21.0.0+04719a4bac,21.0.0-1-ga51b5d4+f5e6047307,21.0.0-11-g2b59f77+a9c1acf22d,21.0.0-11-ga42c5b2+86977b0b17,21.0.0-12-gf4ce030+76814010d2,21.0.0-13-g1721dae+760e7a6536,21.0.0-13-g3a573fe+768d78a30a,21.0.0-15-g5a7caf0+f21cbc5713,21.0.0-16-g0fb55c1+b60e2d390c,21.0.0-19-g4cded4ca+71a93a33c0,21.0.0-2-g103fe59+bb20972958,21.0.0-2-g45278ab+04719a4bac,21.0.0-2-g5242d73+3ad5d60fb1,21.0.0-2-g7f82c8f+8babb168e8,21.0.0-2-g8f08a60+06509c8b61,21.0.0-2-g8faa9b5+616205b9df,21.0.0-2-ga326454+8babb168e8,21.0.0-2-gde069b7+5e4aea9c2f,21.0.0-2-gecfae73+1d3a86e577,21.0.0-2-gfc62afb+3ad5d60fb1,21.0.0-25-g1d57be3cd+e73869a214,21.0.0-3-g357aad2+ed88757d29,21.0.0-3-g4a4ce7f+3ad5d60fb1,21.0.0-3-g4be5c26+3ad5d60fb1,21.0.0-3-g65f322c+e0b24896a3,21.0.0-3-g7d9da8d+616205b9df,21.0.0-3-ge02ed75+a9c1acf22d,21.0.0-4-g591bb35+a9c1acf22d,21.0.0-4-g65b4814+b60e2d390c,21.0.0-4-gccdca77+0de219a2bc,21.0.0-4-ge8a399c+6c55c39e83,21.0.0-5-gd00fb1e+05fce91b99,21.0.0-6-gc675373+3ad5d60fb1,21.0.0-64-g1122c245+4fb2b8f86e,21.0.0-7-g04766d7+cd19d05db2,21.0.0-7-gdf92d54+04719a4bac,21.0.0-8-g5674e7b+d1bd76f71f,master-gac4afde19b+a9c1acf22d,w.2021.13
LSST Data Management Base Package
AliasMap.cc
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1 // -*- lsst-c++ -*-
2 /*
3  * LSST Data Management System
4  * Copyright 2008-2014 LSST Corporation.
5  *
6  * This product includes software developed by the
7  * LSST Project (http://www.lsst.org/).
8  *
9  * This program is free software: you can redistribute it and/or modify
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22  */
23 
24 #include <algorithm>
25 #include <vector>
26 
27 #include "lsst/utils/hashCombine.h"
28 
29 #include "lsst/pex/exceptions.h"
32 
33 namespace lsst {
34 namespace afw {
35 namespace table {
36 
37 void AliasMap::_apply(std::string& name) const {
38  // Loop in order to keep replacing as long as we keep finding matches,
39  // but we count how many replacements we've made to avoid an infinite loop
40  // due to a cycle between aliases. That's not the most efficient way to
41  // find cycles, but since a cycle represents a bug in some other code that
42  // should be rare, we don't really care.
43  for (std::size_t count = 0; count <= _internal.size(); ++count) {
44  Iterator i = _internal.lower_bound(name);
45  if (i != _internal.end() && i->first.size() == name.size() && i->first == name) {
46  // We have a complete match: alias matches the full name we were given
47  name = i->second;
48  } else if (i != _internal.begin()) {
49  // Might still have a partial match: in this case, the iterator
50  // lower_bound returns will be one past the best match, since
51  // smaller strings are considered "less than" longer strings
52  // that they share the same initial charaters with.
53  --i;
54  if (i->first.size() < name.size() && name.compare(0, i->first.size(), i->first) == 0) {
55  name.replace(0, i->first.size(), i->second);
56  } else {
57  return; // no match; exit
58  }
59  } else {
60  return; // no match; exit
61  }
62  }
63  throw LSST_EXCEPT(pex::exceptions::RuntimeError,
64  (boost::format("Cycle detected in schema aliases involving name '%s'") % name).str());
65 }
66 
69  _apply(result);
70  return result;
71 }
72 
74  Iterator i = _internal.find(name);
75  if (i == _internal.end()) {
77  (boost::format("Alias '%s' not found") % name).str());
78  }
79  return i->second;
80 }
81 
82 void AliasMap::set(std::string const& alias, std::string const& target) {
83  _internal[alias] = target;
84  if (_table) {
85  _table->handleAliasChange(alias);
86  }
87 }
88 
89 bool AliasMap::erase(std::string const& alias) {
90  bool result = _internal.erase(alias);
91  if (_table) {
92  _table->handleAliasChange(alias);
93  }
94  return result;
95 }
96 
97 bool AliasMap::operator==(AliasMap const& other) const { return _internal == other._internal; }
98 
100  // Warning: this algorithm will be invalid if _internal is replaced by an unsorted map
101  // Completely arbitrary seed
102  std::size_t result = 42;
103  for (auto entry : _internal) {
104  result = utils::hashCombine(result, entry.first, entry.second);
105  }
106  return result;
107 }
108 
109 bool AliasMap::contains(AliasMap const& other) const {
110  return std::includes(begin(), end(), other.begin(), other.end());
111 }
112 } // namespace table
113 } // namespace afw
114 } // namespace lsst
py::object result
Definition: _schema.cc:430
table::Key< std::string > name
Definition: Amplifier.cc:116
Key< Flag > const & target
#define LSST_EXCEPT(type,...)
Create an exception with a given type.
Definition: Exception.h:48
ItemVariant const * other
Definition: Schema.cc:56
T begin(T... args)
Mapping class that holds aliases for a Schema.
Definition: AliasMap.h:36
bool contains(AliasMap const &other) const
Return true if all aliases in this are also in other (with the same targets).
Definition: AliasMap.cc:109
std::map< std::string, std::string >::const_iterator Iterator
An iterator over alias->target pairs.
Definition: AliasMap.h:57
std::string apply(std::string const &name) const
Apply any aliases that match the given field name and return a de-aliased name.
Definition: AliasMap.cc:67
Iterator begin() const
Return a iterator to the beginning of the map.
Definition: AliasMap.h:60
bool erase(std::string const &alias)
Remove an alias from the schema if it is present.
Definition: AliasMap.cc:89
std::string get(std::string const &alias) const
Return the target of the given alias.
Definition: AliasMap.cc:73
std::size_t hash_value() const noexcept
Return a hash of this object.
Definition: AliasMap.cc:99
void set(std::string const &alias, std::string const &target)
Add an alias to the schema or replace an existing one.
Definition: AliasMap.cc:82
bool operator==(AliasMap const &other) const
Equality comparison.
Definition: AliasMap.cc:97
Iterator end() const
Return a iterator to one past the end of the map.
Definition: AliasMap.h:63
virtual void handleAliasChange(std::string const &alias)
Definition: BaseTable.h:201
Reports attempts to access elements using an invalid key.
Definition: Runtime.h:151
T count(T... args)
T end(T... args)
T erase(T... args)
T find(T... args)
T includes(T... args)
T lower_bound(T... args)
def format(config, name=None, writeSourceLine=True, prefix="", verbose=False)
Definition: history.py:174
std::size_t hashCombine(std::size_t seed) noexcept
Combine hashes.
Definition: hashCombine.h:35
A base class for image defects.
T size(T... args)