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LSST Data Management Base Package
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FitsTable.h
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1/*
2 * LSST Data Management System
3 * Copyright 2017 AURA/LSST.
4 *
5 * This product includes software developed by the
6 * LSST Project (http://www.lsst.org/).
7 *
8 * This program is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the LSST License Statement and
19 * the GNU General Public License along with this program. If not,
20 * see <https://www.lsstcorp.org/LegalNotices/>.
21 */
22#ifndef ASTSHIM_FITSTABLE_H
23#define ASTSHIM_FITSTABLE_H
24
25#include <complex>
26#include <string>
27#include <vector>
28
29#include "ndarray.h"
30
31#include "astshim/base.h"
32#include "astshim/Object.h"
33#include "astshim/Table.h"
34#include "astshim/FitsChan.h"
35
36namespace ast {
37
38class FitsTable : public Table {
39 friend class Object;
40
41public:
42 explicit FitsTable(FitsChan const &header, std::string const &options = "")
43 : Table(reinterpret_cast<AstTable *>(astFitsTable(const_cast<AstObject *>(header.getRawPtr()),
44 "%s", options.c_str()))) {
45 assertOK();;
46 }
47 explicit FitsTable(std::string const &options = "")
48 : Table(reinterpret_cast<AstTable *>(astFitsTable(NULL,
49 "%s", options.c_str()))) {
50 assertOK();;
51 }
52
53
54 virtual ~FitsTable(){};
55
56 FitsTable(FitsTable const &) = default;
57 FitsTable(FitsTable &&) = default;
58 FitsTable &operator=(FitsTable const &) = delete;
60
62 auto *rawFitsChan = reinterpret_cast<AstObject *>(astGetTableHeader(getRawPtr()));
63 assertOK(rawFitsChan);
64 if (!rawFitsChan) {
65 throw std::runtime_error("getTableHeader failed (returned a null fitschan)");
66 }
67 return Object::fromAstObject<FitsChan>(rawFitsChan, false);
68 }
69
71 size_t retVal = astColumnSize(getRawPtr(), column.c_str());
72 assertOK();
73 return retVal;
74 }
75
76 // We do not know the shape of the column so in C++ we can only return
77 // the elements as a 1-D double array. It is up to the caller to extract
78 // the relevant information.
79 ndarray::Array<double, 1, 1> getColumnData1D(std::string const &column) {
80 auto dtype = columnType(column);
81 if (dtype != DataType::DoubleType) {
82 throw std::runtime_error("Data type not supported by getColumnData");
83 }
84 // We can ask AST for the number of bytes required but for now
85 // calculate the number of elements from the shape and rows
86 auto totnel = getNRow();
87 auto shape = columnShape(column);
88 for (auto &val : shape) {
89 totnel *= val;
90 }
91 ndarray::Array<double, 1, 1> coldata = ndarray::allocate(ndarray::makeVector(totnel));
92 int nelem;
93 astGetColumnData(getRawPtr(), column.c_str(), AST__NANF, AST__NAN, totnel*sizeof(double),
94 coldata.getData(), &nelem);
95 return coldata;
96 }
97
98 protected:
99
103 explicit FitsTable(AstFitsTable *rawFitsTable) : Table(reinterpret_cast<AstTable *>(rawFitsTable)) {
104 if (!astIsAFitsTable(getRawPtr())) {
106 os << "this is a " << getClassName() << ", which is not a FitsTable";
107 throw std::invalid_argument(os.str());
108 }
109 assertOK();
110 }
111
112
113};
114
115} // namespace ast
116
117#endif
T c_str(T... args)
A specialized form of Channel which reads and writes FITS header cards.
Definition FitsChan.h:202
friend class Object
Definition FitsTable.h:39
FitsTable(AstFitsTable *rawFitsTable)
Construct a FitsTable from a raw AstFitsTable.
Definition FitsTable.h:103
FitsTable & operator=(FitsTable const &)=delete
ndarray::Array< double, 1, 1 > getColumnData1D(std::string const &column)
Definition FitsTable.h:79
FitsTable(FitsChan const &header, std::string const &options="")
Definition FitsTable.h:42
std::size_t columnSize(std::string const &column)
Definition FitsTable.h:70
FitsTable(std::string const &options="")
Definition FitsTable.h:47
FitsTable(FitsTable &&)=default
virtual ~FitsTable()
Definition FitsTable.h:54
std::shared_ptr< FitsChan > getTableHeader() const
Definition FitsTable.h:61
FitsTable(FitsTable const &)=default
FitsTable & operator=(FitsTable &&)=default
static std::shared_ptr< Class > fromAstObject(AstObject *rawObj, bool copy)
Given a bare AST object pointer return a shared pointer to an ast::Object of the correct type.
Definition Object.cc:138
std::string getClassName() const
Get Class: the name of the class (e.g.
Definition Object.h:139
AstObject const * getRawPtr() const
Get the raw AST pointer.
Definition Object.h:292
std::vector< int > columnShape(std::string const &column)
Definition Table.h:87
DataType columnType(std::string const &column) const
Definition Table.h:57
int getNRow() const
Get NRow: The number of rows currently in the Table.
Definition Table.h:106
Table(std::string const &options="")
Definition Table.h:39
AST wrapper classes and functions.
@ DoubleType
Definition base.h:66
void assertOK(AstObject *rawPtr1=nullptr, AstObject *rawPtr2=nullptr)
Throw std::runtime_error if AST's state is bad.
Definition base.cc:49
T str(T... args)