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//# TableMeasColumn.cc: Access to Measure Columns in Tables.
//# Copyright (C) 1999,2000
//# 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/TableMeasColumn.h>
#include <casacore/measures/TableMeasures/TableMeasDescBase.h>
#include <casacore/tables/Tables/Table.h>
#include <casacore/tables/Tables/TableRecord.h>
#include <casacore/tables/Tables/TableError.h>
#include <casacore/casa/BasicSL/String.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
TableMeasColumn::TableMeasColumn()
: itsNvals (0),
itsVarRefFlag (False),
itsVarOffFlag (False)
{}
TableMeasColumn::TableMeasColumn (const Table& tab,
const String& columnName)
: itsNvals (0),
itsTabDataCol (tab, columnName)
{
itsDescPtr.reset (TableMeasDescBase::reconstruct (tab, columnName));
itsVarRefFlag = itsDescPtr->isRefCodeVariable();
itsVarOffFlag = itsDescPtr->isOffsetVariable();
}
TableMeasColumn::TableMeasColumn (const TableMeasColumn& that)
: itsNvals (that.itsNvals),
itsDescPtr (that.itsDescPtr),
itsTabDataCol (that.itsTabDataCol),
itsVarRefFlag (that.itsVarRefFlag),
itsVarOffFlag (that.itsVarOffFlag)
{}
TableMeasColumn::~TableMeasColumn()
{}
void TableMeasColumn::reference (const TableMeasColumn& that)
{
itsNvals = that.itsNvals;
itsDescPtr = that.itsDescPtr;
itsTabDataCol.reference (that.itsTabDataCol);
itsVarRefFlag = that.itsVarRefFlag;
itsVarOffFlag = that.itsVarOffFlag;
}
void TableMeasColumn::attach (const Table& tab, const String& columnName)
{
reference (TableMeasColumn (tab, columnName));
}
const String& TableMeasColumn::columnName() const
{
return itsDescPtr->columnName();
}
Bool TableMeasColumn::isDefined (rownr_t rownr) const
{
return itsTabDataCol.isDefined (rownr);
}
void TableMeasColumn::throwIfNull() const
{
if (isNull()) {
throw (TableInvOper("MeasTableColumn object is null"));
}
}
Table TableMeasColumn::table() const
{
return itsTabDataCol.table();
}
Bool TableMeasColumn::isScalar() const
{
if (itsTabDataCol.columnDesc().isScalar()) {
return True;
}
IPosition shape = itsTabDataCol.shapeColumn();
if (shape.nelements() == 1) {
if (itsNvals == 0 || Int(itsNvals) == shape(0)) {
return True;
}
}
return False;
}
} //# NAMESPACE CASACORE - END
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