/usr/include/casacore/meas/MeasUDF/EpochUDF.h is in casacore-dev 2.2.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | //# EpochUDF.h: TaQL UDFs for Epoch conversions
//# Copyright (C) 2011
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//# $Id$
#ifndef MEAS_EPOCHUDF_H
#define MEAS_EPOCHUDF_H
//# Includes
#include <casacore/casa/aips.h>
#include <casacore/meas/MeasUDF/EpochEngine.h>
#include <casacore/tables/TaQL/UDFBase.h>
#include <casacore/tables/TaQL/ExprNode.h>
#include <casacore/measures/Measures/MEpoch.h>
#include <casacore/measures/Measures/MCEpoch.h>
#include <casacore/measures/Measures/MeasConvert.h>
namespace casacore {
// <summary>
// TaQL UDFs for Epoch conversions.
// </summary>
// <use visibility=export>
// <reviewed reviewer="" date="" tests="tMeas.cc">
// </reviewed>
// <prerequisite>
//# Classes you should understand before using this one.
// <li> UDFBase
// </prerequisite>
// <synopsis>
// EpochUDF defines UDFs (user defined functions) that can be used in TaQL
// to convert Measures for epochs.
// Special functions exist to convert to local sidereal time.
// In this way such derived values appear to be ordinary TaQL functions.
//
// A function is called like:
// <srcblock>
// meas.epoch (toref, epoch, fromref, pos, posref)
// For example,
// meas.dir ('APP', 'MOON', POSITION, TIME)
// </srcblock>
// <ul>
// <li>
// <src>toref</src> is a single constant string.
// <li>
// <src>dir</src> can have various value types. A single numeric array is
// a series of RA,DEC in J2000. If given as a set, the last argument of the
// set can be the reference types of the values in the set. The values can
// be strings (indicating planetary objects) or value pairs giving lon,lat.
// The default reference type is J2000.
// </ul>
// All functions have data type double and unit radian.
// </synopsis>
// <motivation>
// It makes it possible to handle measures in TaQL.
// </motivation>
class EpochUDF: public UDFBase
{
public:
// Define the possible function types.
enum FuncType {EPOCH, LAST};
explicit EpochUDF (FuncType);
// Function to create an object.
static UDFBase* makeEPOCH (const String&);
static UDFBase* makeLAST (const String&);
// Setup the object.
virtual void setup (const Table&, const TaQLStyle&);
// Get the value.
virtual Double getDouble (const TableExprId& id);
virtual MArray<Double> getArrayDouble (const TableExprId& id);
private:
//# Data members.
EpochEngine itsEngine;
PositionEngine itsPositionEngine;
FuncType itsType;
MEpoch::Types itsRefType;
Bool itsSidFrac; // T = use fraction for sidereal times
};
} //end namespace
#endif
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