| 1 | //
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| 2 | // C++ Implementation: STPol
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| 3 | //
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| 4 | // Description:
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| 5 | //
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| 6 | //
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| 7 | // Author: Malte Marquarding <asap@atnf.csiro.au>, (C) 2005
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| 8 | //
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| 9 | // Copyright: See COPYING file that comes with this distribution
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| 10 | //
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| 11 | //
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| 12 |
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| 13 | #include <casa/Exceptions/Error.h>
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| 14 | #include "STPol.h"
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| 15 |
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| 16 | std::map<std::string, std::pair<int, std::string> > asap::STPol::polmap_;
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| 17 | std::map<std::string, std::map<int, std::string> > asap::STPol::labelmap_;
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| 18 |
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| 19 | void asap::STPol::initLabelMap()
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| 20 | {
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| 21 | if ( labelmap_.empty() ) {
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| 22 | std::map<int, std::string> linears;
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| 23 | linears[0] = "XX";linears[1] = "YY";
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| 24 | linears[2] = "Re(XY)";linears[3] = "Imag(XY)";
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| 25 | STPol::labelmap_["linear"] = linears;
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| 26 | std::map<int, std::string> circulars;
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| 27 | circulars[0] = "RR";circulars[1] = "LL";
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| 28 | circulars[2] = "Re(RL)";circulars[3] = "Imag(RL)";
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| 29 | STPol::labelmap_["circular"] = circulars;
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| 30 | std::map<int, std::string> stokes;
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| 31 | stokes[0]="I";stokes[1]="Q";stokes[2]="U";stokes[3]="V";
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| 32 | STPol::labelmap_["stokes"] = stokes;
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| 33 | std::map<int, std::string> linpol;
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| 34 | linpol[1] = "Plinear";linpol[2] = "Pangle";
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| 35 | STPol::labelmap_["linpol"] = linpol;
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| 36 | }
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| 37 | }
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| 38 |
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| 39 | std::string asap::STPol::getPolLabel( int index,
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| 40 | const std::string& type)
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| 41 | {
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| 42 | initLabelMap();
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| 43 | if ( labelmap_.find(type) == labelmap_.end() ) {
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| 44 | std::string msg = "Illegal polarisation type "+type;
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| 45 | throw(casa::AipsError(msg));
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| 46 | } else {
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| 47 | std::map<int, std::string> poltype = labelmap_[type];
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| 48 | if ( poltype.find(index) == poltype.end() ) {
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| 49 | std::string msg = "Illegal polarisation index";
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| 50 | throw(casa::AipsError(msg));
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| 51 | } else {
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| 52 | return poltype[index];
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| 53 | }
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| 54 | }
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| 55 | }
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| 56 |
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| 57 | void asap::STPol::initPolMap( )
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| 58 | {
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| 59 | if ( polmap_.empty() ) {
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| 60 | std::pair<int, std::string> val;
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| 61 | val.first = 0; val.second = "linear";
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| 62 | STPol::polmap_["XX"] = val;
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| 63 | val.first = 1;
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| 64 | STPol::polmap_["YY"] = val;
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| 65 | val.first = 2;
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| 66 | STPol::polmap_["Re(XY)"] = val;
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| 67 | val.first = 3;
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| 68 | STPol::polmap_["Imag(XY)"] = val;
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| 69 | val.first = 0; val.second = "stokes";
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| 70 | STPol::polmap_["I"] = val;
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| 71 | val.first = 1;
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| 72 | STPol::polmap_["Q"] = val;
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| 73 | val.first = 2;
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| 74 | STPol::polmap_["U"] = val;
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| 75 | val.first = 3;
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| 76 | STPol::polmap_["V"] = val;
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| 77 | val.first = 1; val.second = "linpol";
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| 78 | STPol::polmap_["Plinear"] = val;
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| 79 | val.first = 2;
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| 80 | STPol::polmap_["Pangle"] = val;
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| 81 | val.first = 0; val.second = "circular";
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| 82 | STPol::polmap_["RR"] = val;
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| 83 | val.first = 1;
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| 84 | STPol::polmap_["LL"] = val;
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| 85 | val.first = 2;
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| 86 | STPol::polmap_["Re(RL)"] = val;
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| 87 | val.first = 3;
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| 88 | STPol::polmap_["Imag(RL)"] = val;
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| 89 | }
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| 90 | }
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| 91 |
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| 92 | std::pair<int, std::string> asap::STPol::polFromString( const std::string& key )
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| 93 | {
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| 94 | initPolMap();
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| 95 | if ( polmap_.find(key) == polmap_.end() ) {
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| 96 | std::string msg = "Illegal polarisation type "+key;
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| 97 | throw(casa::AipsError(msg));
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| 98 | } else {
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| 99 | return polmap_[key];
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| 100 | }
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| 101 | }
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