casacore
Loading...
Searching...
No Matches
ExprNodeRecord.h
Go to the documentation of this file.
1//# ExprNodeRecord.h: Nodes representing fields in record select expression tree
2//# Copyright (C) 2000
3//# Associated Universities, Inc. Washington DC, USA.
4//#
5//# This library is free software; you can redistribute it and/or modify it
6//# under the terms of the GNU Library General Public License as published by
7//# the Free Software Foundation; either version 2 of the License, or (at your
8//# option) any later version.
9//#
10//# This library is distributed in the hope that it will be useful, but WITHOUT
11//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
13//# License for more details.
14//#
15//# You should have received a copy of the GNU Library General Public License
16//# along with this library; if not, write to the Free Software Foundation,
17//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
18//#
19//# Correspondence concerning AIPS++ should be addressed as follows:
20//# Internet email: aips2-request@nrao.edu.
21//# Postal address: AIPS++ Project Office
22//# National Radio Astronomy Observatory
23//# 520 Edgemont Road
24//# Charlottesville, VA 22903-2475 USA
25//#
26//# $Id: ExprNodeRecord.h 21262 2012-09-07 12:38:36Z gervandiepen $
27
28#ifndef TABLES_EXPRNODERECORD_H
29#define TABLES_EXPRNODERECORD_H
30
31//# Includes
32#include <casacore/tables/TaQL/ExprNodeRep.h>
33#include <casacore/tables/TaQL/ExprNodeArray.h>
34#include <casacore/casa/Containers/Block.h>
35#include <casacore/casa/Utilities/DataType.h>
36
37namespace casacore { //# NAMESPACE CASACORE - BEGIN
38
39//# Forward Declarations
40class RecordDesc;
41class RecordInterface;
42
43
44//# This file defines classes derived from TableExprNode representing
45//# fields in a record select expression.
46//#
47//# Data types Bool, Double, DComplex and String are used.
48//# Char, uChar, Short, uShort, Int and uInt are converted to Int64,
49//# float to Double, and Complex to DComplex.
50//# Binary operators +, -, *, /, ==, >=, >, <, <= and != are recognized.
51//# Also &&, ||, parentheses and unary +, - and ! are recognized.
52
53
54
55// <summary>
56// Scalar field in record select expression tree
57// </summary>
58
59// <use visibility=local>
60
61// <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="">
62// </reviewed>
63//
64// <prerequisite>
65//# Classes you should understand before using this one.
66// <li> TableExprNode
67// </prerequisite>
68
69// <synopsis>
70// This class represents a scalar column in a table select expression tree.
71// When the select expression gets evaluated, the value of the
72// given row in the column is used.
73// </synopsis>
74
75
77{
78public:
79 TableExprNodeRecordField (DataType dtype,
80 const Block<Int>& fieldNumbers);
82
83 virtual const IPosition& getShape (const TableExprId& id);
84 virtual Bool isDefined (const TableExprId& id);
85
86 virtual Bool getBool (const TableExprId& id);
87 virtual Int64 getInt (const TableExprId& id);
88 virtual Double getDouble (const TableExprId& id);
89 virtual DComplex getDComplex (const TableExprId& id);
90 virtual String getString (const TableExprId& id);
91
92protected:
95
96 // Get the record for the last field number, thus going through
97 // all subrecords for the other field numbers.
98 const RecordInterface& getRecord (const TableExprId& id) const;
99};
100
101
102
103// <summary>
104// Array field in record select expression tree
105// </summary>
106
107// <use visibility=local>
108
109// <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests="">
110// </reviewed>
111//
112// <prerequisite>
113//# Classes you should understand before using this one.
114// <li> TableExprNode
115// </prerequisite>
116
117// <synopsis>
118// This class represents a scalar column in a table select expression tree.
119// When the select expression gets evaluated, the value of the
120// given row in the column is used.
121// </synopsis>
122
123
125{
126public:
128 const Block<Int>& fieldNumbers);
130
131 virtual Bool isDefined (const TableExprId& id);
132 virtual const IPosition& getShape (const TableExprId& id);
133
139
140protected:
143
144 // Get the record for the last field number, thus going through
145 // all subrecords for the other field numbers.
146 const RecordInterface& getRecord (const TableExprId& id) const;
147};
148
149
150
151
152} //# NAMESPACE CASACORE - END
153
154#endif
simple 1-D array
Definition Block.h:200
String: the storage and methods of handling collections of characters.
Definition String.h:225
Abstract base class for a node having 0, 1, or 2 child nodes.
Array field in record select expression tree.
virtual MArray< String > getArrayString(const TableExprId &id)
virtual const IPosition & getShape(const TableExprId &id)
Get the shape of the array in the given row.
virtual Bool isDefined(const TableExprId &id)
Is the value in the given row defined? The default implementation returns True.
virtual MArray< Int64 > getArrayInt(const TableExprId &id)
virtual MArray< Bool > getArrayBool(const TableExprId &id)
Get an array value for this node in the given row.
virtual MArray< DComplex > getArrayDComplex(const TableExprId &id)
The default implementation of getArrayDComplex does getArrayDouble and converts the result.
const RecordInterface & getRecord(const TableExprId &id) const
Get the record for the last field number, thus going through all subrecords for the other field numbe...
TableExprNodeRecordFieldArray(DataType dtype, const Block< Int > &fieldNumbers)
virtual MArray< Double > getArrayDouble(const TableExprId &id)
The default implementation of getArrayDouble does getArrayInt and converts the result.
const RecordInterface & getRecord(const TableExprId &id) const
Get the record for the last field number, thus going through all subrecords for the other field numbe...
virtual Bool isDefined(const TableExprId &id)
Is the value in the given row defined? The default implementation returns True.
virtual Bool getBool(const TableExprId &id)
Get a scalar value for this node in the given row.
TableExprNodeRecordField(DataType dtype, const Block< Int > &fieldNumbers)
virtual const IPosition & getShape(const TableExprId &id)
Get the shape for the given row.
virtual String getString(const TableExprId &id)
virtual DComplex getDComplex(const TableExprId &id)
virtual Int64 getInt(const TableExprId &id)
virtual Double getDouble(const TableExprId &id)
this file contains all the compiler specific defines
Definition mainpage.dox:28
unsigned int uInt
Definition aipstype.h:51
long long Int64
Define the extra non-standard types used by Casacore (like proposed uSize, Size)
Definition aipsxtype.h:38
bool Bool
Define the standard types used by Casacore.
Definition aipstype.h:42
double Double
Definition aipstype.h:55