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//# ExprNodeRecord.h: Nodes representing fields in record select expression tree
//# 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_EXPRNODERECORD_H
#define TABLES_EXPRNODERECORD_H
//# Includes
#include <casacore/tables/TaQL/ExprNodeRep.h>
#include <casacore/tables/TaQL/ExprNodeArray.h>
#include <casacore/casa/Containers/Block.h>
#include <casacore/casa/Utilities/DataType.h>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
//# Forward Declarations
class RecordDesc;
class RecordInterface;
//# This file defines classes derived from TableExprNode representing
//# fields in a record select expression.
//#
//# Data types Bool, Double, DComplex and String are used.
//# Char, uChar, Short, uShort, Int and uInt are converted to Int64,
//# float to Double, and Complex to DComplex.
//# Binary operators +, -, *, /, ==, >=, >, <, <= and != are recognized.
//# Also &&, ||, parentheses and unary +, - and ! are recognized.
// <summary>
// Scalar field in record select expression tree
// </summary>
// <use visibility=local>
// <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="">
// </reviewed>
//
// <prerequisite>
//# Classes you should understand before using this one.
// <li> TableExprNode
// </prerequisite>
// <synopsis>
// This class represents a scalar column in a table select expression tree.
// When the select expression gets evaluated, the value of the
// given row in the column is used.
// </synopsis>
class TableExprNodeRecordField : public TableExprNodeBinary
{
public:
TableExprNodeRecordField (DataType dtype,
const Block<Int>& fieldNumbers);
~TableExprNodeRecordField();
virtual const IPosition& getShape (const TableExprId& id);
virtual Bool isDefined (const TableExprId& id);
virtual Bool getBool (const TableExprId& id);
virtual Int64 getInt (const TableExprId& id);
virtual Double getDouble (const TableExprId& id);
virtual DComplex getDComplex (const TableExprId& id);
virtual String getString (const TableExprId& id);
protected:
Block<Int> fieldNrs_p;
uInt lastEntry_p;
// Get the record for the last field number, thus going through
// all subrecords for the other field numbers.
const RecordInterface& getRecord (const TableExprId& id) const;
};
// <summary>
// Array field in record select expression tree
// </summary>
// <use visibility=local>
// <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="">
// </reviewed>
//
// <prerequisite>
//# Classes you should understand before using this one.
// <li> TableExprNode
// </prerequisite>
// <synopsis>
// This class represents a scalar column in a table select expression tree.
// When the select expression gets evaluated, the value of the
// given row in the column is used.
// </synopsis>
class TableExprNodeRecordFieldArray : public TableExprNodeArray
{
public:
TableExprNodeRecordFieldArray (DataType dtype,
const Block<Int>& fieldNumbers);
~TableExprNodeRecordFieldArray();
virtual Bool isDefined (const TableExprId& id);
virtual const IPosition& getShape (const TableExprId& id);
virtual MArray<Bool> getArrayBool (const TableExprId& id);
virtual MArray<Int64> getArrayInt (const TableExprId& id);
virtual MArray<Double> getArrayDouble (const TableExprId& id);
virtual MArray<DComplex> getArrayDComplex (const TableExprId& id);
virtual MArray<String> getArrayString (const TableExprId& id);
protected:
Block<Int> fieldNrs_p;
uInt lastEntry_p;
// Get the record for the last field number, thus going through
// all subrecords for the other field numbers.
const RecordInterface& getRecord (const TableExprId& id) const;
};
} //# NAMESPACE CASACORE - END
#endif
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