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//# SSMIndStringColumn.h: An Indirect String Array Column in the SSM
//# Copyright (C) 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
#ifndef TABLES_SSMINDSTRINGCOLUMN_H
#define TABLES_SSMINDSTRINGCOLUMN_H
//# Includes
#include <casacore/casa/aips.h>
#include <casacore/tables/DataMan/SSMDirColumn.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward declarations
// <summary>
// An Indirect String Array Column in the Standard Storage Manager.
// </summary>
// <use visibility=local>
// <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="tSSMStringHandler.cc">
// </reviewed>
// <prerequisite>
//# Classes you should understand before using this one.
// <li> <linkto class=SSMBase>SSMBase</linkto>
// <li> <linkto class=SSMDirColumn>SSMColumn</linkto>
// <li> <linkto class=SSMStringHandler>SSMStringHandler</linkto>
// </prerequisite>
// <etymology>
// SSMIndStringColumn represents an Indirect String Array Column in the
// Standard Storage Manager.
// </etymology>
// <synopsis>
// SSMIndStringColumn handles indirect variable shaped string arrays.
// Note that indirect fixed shape string arrays are handled by
// <linkto class=SSMDirColumn>SSMDirColumn</linkto>.
// <p>
// All string array access is handled by class
// <linkto class=SSMStringHandler>SSMStringHandler</linkto>, so
// SSMIndStringColumn is merely an interface to this class.
// The only thing it does is accessing the bucketnr, offset, and length
// in the data bucket.
// </synopsis>
// <motivation>
// The reason that indirect string arrays are handled here instead of
// in <linkto class=SSMIndColumn>SSMIndColumn</linkto> is that the string
// buckets are more disk space efficient when string arrays are frequently
// updated.
// </motivation>
//# <todo asof="$DATE:$">
//# A List of bugs, limitations, extensions or planned refinements.
//# </todo>
class SSMIndStringColumn : public SSMDirColumn
{
public:
// Create a SSMIndStringColumn object with the given parent.
// It initializes the various variables.
// It keeps the pointer to its parent (but does not own it).
SSMIndStringColumn (SSMBase* aParent, int aDataType, uInt aColNr);
virtual ~SSMIndStringColumn();
// Forbid copy constructor.
SSMIndStringColumn (const SSMIndStringColumn&) = delete;
// Forbid assignment.
SSMIndStringColumn& operator= (const SSMIndStringColumn&) = delete;
// Get an array value in the given row.
// An exception is thrown if no array is defined in this row.
virtual void getArrayV (rownr_t rownr, ArrayBase& dataPtr);
// Put an array value in the given row.
virtual void putArrayV (rownr_t rownr, const ArrayBase& dataPtr);
// Set the shape of the array in the given row.
void setShape (rownr_t aRowNr, const IPosition& aShape);
// Get the shape of the array in the given row.
virtual IPosition shape (rownr_t aRowNr);
// This storage manager can handle changing array shapes.
Bool canChangeShape() const;
// Is the shape defined (i.e. is there an array) in this row?
virtual Bool isShapeDefined (rownr_t aRowNr);
// Get the dimensionality of the item in the given row.
virtual uInt ndim (rownr_t aRowNr);
};
} //# NAMESPACE CASACORE - END
#endif
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