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//# TableMeasDefBase.cc: Definition of a Measure in a Table.
//# Copyright (C) 1997,1998,1999,2000,2001
//# 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: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//# Includes
#include <casacore/measures/TableMeasures/TableMeasDescBase.h>
#include <casacore/measures/TableMeasures/TableQuantumDesc.h>
#include <casacore/tables/Tables/Table.h>
#include <casacore/tables/Tables/TableColumn.h>
#include <casacore/tables/Tables/TableDesc.h>
#include <casacore/tables/Tables/ColumnDesc.h>
#include <casacore/tables/Tables/TableRecord.h>
#include <casacore/measures/Measures/Measure.h>
#include <casacore/measures/Measures/MeasureHolder.h>
#include <casacore/casa/Quanta/Quantum.h>
#include <casacore/casa/Quanta/Unit.h>
#include <casacore/casa/Arrays/Vector.h>
#include <casacore/casa/BasicSL/String.h>
#include <casacore/casa/Exceptions/Error.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
TableMeasDescBase::TableMeasDescBase()
{}
TableMeasDescBase::TableMeasDescBase (const TableMeasValueDesc& value,
const TableMeasRefDesc& ref)
: itsValue (value),
itsRef (ref)
{}
TableMeasDescBase::TableMeasDescBase (const TableMeasDescBase& that)
: itsValue (that.itsValue),
itsRef (that.itsRef),
itsMeasType (that.itsMeasType),
itsUnits (that.itsUnits)
{}
TableMeasDescBase::~TableMeasDescBase()
{}
TableMeasDescBase* TableMeasDescBase::clone() const
{
return new TableMeasDescBase(*this);
}
TableMeasDescBase* TableMeasDescBase::reconstruct (const Table& tab,
const String& columnName)
{
Int fnr;
TableRecord mtype;
TableRecord measInfo;
const TableRecord& columnKeyset = tab.tableDesc()[columnName].keywordSet();
// get the Measure type
fnr = columnKeyset.fieldNumber("MEASINFO");
if (fnr >= 0) {
measInfo = columnKeyset.asRecord(fnr);
// Older TableMeasures has a separate Type record for itsMeasType.
// Newer ones simply have the type field in the MEASINFO.
if (measInfo.isDefined("Type")) {
mtype = measInfo.asRecord("Type");
} else {
mtype = measInfo;
}
} else {
throw(AipsError("TableMeasDescBase::reconstruct; MEASINFO record not "
"found for column " + columnName));
}
// get the units
TableQuantumDesc* tqdesc = TableQuantumDesc::reconstruct (tab.tableDesc(),
columnName);
Vector<String> names(tqdesc->getUnits());
Vector<Unit> units(names.nelements());
for (uInt i=0; i<names.nelements(); i++) {
units(i) = names(i);
}
delete tqdesc;
String error;
MeasureHolder measHolder;
measHolder.fromType (error, mtype);
TableMeasDescBase* p = new TableMeasDescBase();
p->itsValue = TableMeasValueDesc (tab.tableDesc(), columnName);
p->itsMeasType = TableMeasType(measHolder.asMeasure());
p->itsUnits = units;
p->itsRef = TableMeasRefDesc (measInfo, tab, measHolder, *p);
return p;
}
TableMeasDescBase& TableMeasDescBase::operator= (const TableMeasDescBase& that)
{
if (this != &that) {
itsValue = that.itsValue;
itsRef = that.itsRef;
itsMeasType = that.itsMeasType;
itsUnits = that.itsUnits;
}
return *this;
}
void TableMeasDescBase::write (TableDesc& td)
{
TableRecord measInfo;
// Create a record from the MeasType and add it to measInfo
itsMeasType.toRecord (measInfo);
// Put the units.
// Use TableQuantumDesc, so the column can be used that way too.
TableQuantumDesc tqdesc(td, itsValue.columnName(), itsUnits);
tqdesc.write (td);
// Write the reference.
itsRef.write (td, measInfo, *this);
// Write the MEASINFO record into the keywords of the value column.
itsValue.write (td, measInfo);
}
void TableMeasDescBase::write (Table& tab)
{
TableRecord measInfo;
// Create a record from the MeasType and add it to measInfo
itsMeasType.toRecord (measInfo);
// Put the units.
// Use TableQuantumDesc, so the column can be used that way too.
TableQuantumDesc tqdesc(tab.tableDesc(), itsValue.columnName(), itsUnits);
tqdesc.write (tab);
// Write the reference.
itsRef.write (tab, measInfo, *this);
// Write the MEASINFO record into the keywords of the value column.
itsValue.write (tab, measInfo);
}
void TableMeasDescBase::writeIfOld (const Table& tab)
{
if (! itsRef.hasRefTab()) {
write (const_cast<Table&>(tab));
}
}
void TableMeasDescBase::initTabRef (const MeasureHolder& measHolder)
{
itsRef.initTabRef (measHolder);
}
void TableMeasDescBase::setMeasUnits (const Measure& meas,
const Vector<Quantum<Double> >& val,
const Vector<Unit>& units)
{
itsMeasType = TableMeasType(meas);
// The input unit vector cannot be longer.
if (units.nelements() > val.nelements()) {
throw (AipsError ("TableMeasDescBase::setMeasUnits; Unit vector"
" for column " + columnName() + " is too long"));
}
// An empty or non-given unit gets the default Quantum one.
itsUnits.resize (val.nelements());
for (uInt i=0; i<val.nelements(); i++) {
if (i >= units.nelements() || units(i).empty()) {
itsUnits(i) = val(i).getUnit();
} else {
if (! (units(i) == val(i).getUnit())) {
throw (AipsError ("TableMeasDescBase::setMeasUnits; invalid unit "
+ units(i).getName() + " for column "
+ columnName()));
}
itsUnits(i) = units(i);
}
}
}
void TableMeasDescBase::resetUnits (const Vector<Unit>& units)
{
if (units.nelements() > itsUnits.nelements()) {
throw (AipsError ("TableMeasDescBase::resetUnits: Unit vector"
" for column " + columnName() + " is too long"));
}
// An empty or non-given unit does not change.
for (uInt i=0; i<units.nelements(); i++) {
if (! units(i).empty()) {
if (! (units(i) == itsUnits(i))) {
throw (AipsError ("TableMeasDescBase::resetUnits; invalid unit "
+ units(i).getName() + " for column "
+ columnName()));
}
itsUnits(i) = units(i);
}
}
}
Bool TableMeasDescBase::hasMeasures (const TableColumn& column)
{
return column.keywordSet().isDefined ("MEASINFO");
}
} //# NAMESPACE CASACORE - END
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