/usr/include/casacore/tables/Tables/TableRecordRep.h is in casacore-dev 2.2.0-2.
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//# Copyright (C) 1996,1997,2000,2001
//# 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: aips2-request@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
//#
//#
//# $Id$
#ifndef TABLES_TABLERECORDREP_H
#define TABLES_TABLERECORDREP_H
#include <casacore/casa/aips.h>
#include <casacore/casa/Containers/RecordRep.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward Declarations
class TableRecord;
class TableAttr;
// <summary>
// The representation of a TableRecord
// </summary>
// <use visibility=local>
// <reviewed reviewer="Mark Wieringa" date="1996/04/15" tests="tTableRecord">
// </reviewed>
// <prerequisite>
// <li> <linkto class="TableRecord">TableRecord</linkto>.
// <li> <linkto class="RecordRep">RecordRep</linkto>.
// </prerequisite>
//
// <etymology>
// TableRecordRep is the REPresentation of a TableRecord.
// </etymology>
//
// <synopsis>
// TableRecordRep is the actual implementation of a TableRecord object.
// It contains the description and the data. The data is stored as
// a collection of void* pointers to the actual data. By storing
// it in this indirect way, it is easier to extend the data block.
// It also means that RecordFieldPtr objects always have the correct
// pointer and do not need to be adjusted when the data block is extended.
// <p>
// Despite the fact that the data pointers have type void*, the
// functions are completely type safe. This is done by passing the
// type around using the DataType enumeration. The downpart is that
// only types from that enumeration are supported (but that is also
// required by the RecordDesc mechanics).
// <p>
// Note that TableRecordRep does not know anything about RecordFieldPtr
// objects pointing to its data. Only its mother class TableRecord
// knows about them and handles all cases where the RecordFieldPtr's
// have to be notified.
// <p>
// Fields containing tables are not directly handled using class Table.
// Instead the class <linkto class=TableKeyword>TableKeyword</linkto>
// is used to map a table name to a table and to take care of
// opening a table on demand.
// </synopsis>
//
// <example>
// TableRecordRep mirrors all functions in TableRecord.
// </example>
//
// <motivation>
// Having a separate TableRecordRep class makes copy-on-write possible.
// It also allows derivation from RecordRep.
// </motivation>
//
//# <todo asof="1995/08/22">
//# </todo>
class TableRecordRep : public RecordRep
{
public:
// Create a record with no fields.
TableRecordRep();
// Create a record with the given description. If it is not possible to
// create all fields (for example, if a field of an unsupported type is
// requested), an exception is thrown.
// All fields are checked by the field checking function (if defined).
TableRecordRep (const RecordDesc& description);
// Create a copy of other using copy semantics.
TableRecordRep (const TableRecordRep& other);
// Copy all the data over.
TableRecordRep& operator= (const TableRecordRep& other);
// Delete all data.
~TableRecordRep();
// Get the comment for this field.
const String& comment (Int whichField) const;
// Set the comment for this field.
void setComment (Int whichField, const String& comment);
// Describes the current structure of this Record.
const RecordDesc& description() const;
// Change the structure of this Record to contain the fields in
// newDescription. After calling restructure, <src>description() ==
// newDescription</src>.
void restructure (const RecordDesc& newDescription, Bool recursive);
// Returns True if this and other have the same RecordDesc, other
// than different names for the fields. That is, the number, type and the
// order of the fields must be identical (recursively for fixed
// structured sub-Records in this).
// <note role=caution>
// <src>thisRecord.conform(thatRecord) == True</src> does not imply
// <br><src>thatRecord.conform(thisRecord) == True</src>, because
// a variable record in one conforms a fixed record in that, but
// not vice-versa.
// </note>
Bool conform (const TableRecordRep& other) const;
// Rename the given field.
void renameField (const String& newName, Int whichField);
// Copy all data of the TableRecord.
void copyData (const TableRecordRep& other);
// Add a field with the given name and value to the record.
// The data type of the field is determined by the data type of the value.
// <group>
void addField (const String& name, const TableRecord& value,
RecordInterface::RecordType type);
void addField (const String& name, const Table& value,
RecordInterface::RecordType type);
// </group>
// Define a value for the given field.
// Array conformance rules will not be applied for variable shaped arrays.
// When the field and value data type mismatch, type promotion
// of scalars will be done if possible. If not possible, an exception
// is thrown.
void defineDataField (Int whichField, DataType type, const void* value);
// Close the table in the given field.
// When accessed again, it will be opened automatically.
// This can be useful to save memory usage.
void closeTable (Int whichField) const;
// Close all open tables.
// When accessed again, it will be opened automatically.
// This can be useful to save memory usage.
void closeTables() const;
// Flush all open subtables.
void flushTables (Bool fsync) const;
// Rename the subtables with a path containing the old parent table name.
void renameTables (const String& newParentName,
const String& oldParentName);
// Are subtables used in other processes.
Bool areTablesMultiUsed() const;
// Put the description and data of the Record.
// It also puts the fixedFlag attribute (of the mother object).
void putRecord (AipsIO& os, Int recordType, const TableAttr&) const;
// Get the description and data of the Record.
// It also gets the fixedFlag attribute (of the mother object).
void getRecord (AipsIO& os, Int& recordType, const TableAttr&);
// Put the data of a record.
// This is used to write a subrecord, whose description has
// already been written.
void putData (AipsIO& os, const TableAttr&) const;
// Read the data of a record.
// This is used to read a subrecord, whose description has
// already been read.
void getData (AipsIO& os, uInt version, const TableAttr&);
// Reopen possible tables in keywords as read/write.
// Tables are not reopened if they are not writable.
void reopenRW();
// Used by the RecordFieldPtr classes to attach in a type-safe way to the
// correct field.
// <group>
void* get_pointer (Int whichField, DataType type) const;
void* get_pointer (Int whichField, DataType type,
const String& recordType) const;
// </group>
// Merge a field from another record into this record.
void mergeField (const TableRecordRep& other, Int whichFieldFromOther,
RecordInterface::DuplicatesFlag);
// Merge all fields from the other record into this record.
void merge (const TableRecordRep& other,
RecordInterface::DuplicatesFlag);
// Print a record.
// Print the contents of the record.
// Only the first <src>maxNrValues</src> of an array will be printed.
// A value < 0 means the entire array.
void print (std::ostream&,
Int maxNrValues = 25,
const String& indent="") const;
protected:
// Utility function to avoid code duplication in the public member
// functions.
void copy_other (const TableRecordRep& other);
// Get the field number for a given name.
virtual Int fieldNumber (const String& name) const;
// Add a field to the description.
virtual void addFieldToDesc (const String& name, DataType type,
const IPosition& shape, Bool fixedShape);
// Remove a data field.
virtual void removeData (Int whichField, void* ptr, void* vecptr);
// Remove a field from the description.
virtual void removeFieldFromDesc (Int whichField);
// Get a KeywordSet object as a TableRecord.
// (type: 0=ScalarKeywordSet, 1=ArrayKeywordSet, 2=TableKeywordSet)
void getTableKeySet (AipsIO& os, uInt version, const TableAttr&,
uInt type);
// Holds the description.
//# Although we could use the RecordDesc object from RecordRep,
//# it is better to use an own RecordDesc object in case a dedicated
//# TableRecordDesc is needed in the future. In this way it
//# is sure that inherited functions do not use the RecordDesc object
//# in RecordRep.
RecordDesc desc_p;
};
inline const String& TableRecordRep::comment (Int whichField) const
{
return desc_p.comment (whichField);
}
inline void TableRecordRep::setComment (Int whichField, const String& comment)
{
desc_p.setComment (whichField, comment);
}
inline const RecordDesc& TableRecordRep::description() const
{
return desc_p;
}
inline void TableRecordRep::renameField (const String& newName, Int whichField)
{
desc_p.renameField (newName, whichField);
}
} //# NAMESPACE CASACORE - END
#endif
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