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00001 //# ExprNodeRecord.h: Nodes representing fields in record select expression tree 00002 //# Copyright (C) 2000 00003 //# Associated Universities, Inc. Washington DC, USA. 00004 //# 00005 //# This library is free software; you can redistribute it and/or modify it 00006 //# under the terms of the GNU Library General Public License as published by 00007 //# the Free Software Foundation; either version 2 of the License, or (at your 00008 //# option) any later version. 00009 //# 00010 //# This library is distributed in the hope that it will be useful, but WITHOUT 00011 //# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 00012 //# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public 00013 //# License for more details. 00014 //# 00015 //# You should have received a copy of the GNU Library General Public License 00016 //# along with this library; if not, write to the Free Software Foundation, 00017 //# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA. 00018 //# 00019 //# Correspondence concerning AIPS++ should be addressed as follows: 00020 //# Internet email: aips2-request@nrao.edu. 00021 //# Postal address: AIPS++ Project Office 00022 //# National Radio Astronomy Observatory 00023 //# 520 Edgemont Road 00024 //# Charlottesville, VA 22903-2475 USA 00025 //# 00026 //# $Id: ExprNodeRecord.h 20652 2009-07-06 05:04:32Z Malte.Marquarding $ 00027 00028 #ifndef TABLES_EXPRNODERECORD_H 00029 #define TABLES_EXPRNODERECORD_H 00030 00031 //# Includes 00032 #include <tables/Tables/ExprNodeRep.h> 00033 #include <tables/Tables/ExprNodeArray.h> 00034 #include <casa/Containers/Block.h> 00035 #include <casa/Utilities/DataType.h> 00036 00037 namespace casa { //# NAMESPACE CASA - BEGIN 00038 00039 //# Forward Declarations 00040 class RecordDesc; 00041 class RecordInterface; 00042 00043 00044 //# This file defines classes derived from TableExprNode representing 00045 //# fields in a record select expression. 00046 //# 00047 //# Data types Bool, Double, DComplex and String are used. 00048 //# Char, uChar, Short, uShort, Int, uInt and float are converted 00049 //# to Double, and Complex to DComplex. 00050 //# Binary operators +, -, *, /, ==, >=, >, <, <= and != are recognized. 00051 //# Also &&, ||, parentheses and unary +, - and ! are recognized. 00052 00053 00054 00055 // <summary> 00056 // Scalar field in record select expression tree 00057 // </summary> 00058 00059 // <use visibility=local> 00060 00061 // <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests=""> 00062 // </reviewed> 00063 // 00064 // <prerequisite> 00065 //# Classes you should understand before using this one. 00066 // <li> TableExprNode 00067 // </prerequisite> 00068 00069 // <synopsis> 00070 // This class represents a scalar column in a table select expression tree. 00071 // When the select expression gets evaluated, the value of the 00072 // given row in the column is used. 00073 // </synopsis> 00074 00075 00076 class TableExprNodeRecordField : public TableExprNodeBinary 00077 { 00078 public: 00079 TableExprNodeRecordField (DataType dtype, 00080 const Block<Int>& fieldNumbers); 00081 ~TableExprNodeRecordField(); 00082 00083 virtual const IPosition& getShape (const TableExprId& id); 00084 virtual Bool isDefined (const TableExprId& id); 00085 00086 virtual Bool getBool (const TableExprId& id); 00087 virtual Int64 getInt (const TableExprId& id); 00088 virtual Double getDouble (const TableExprId& id); 00089 virtual DComplex getDComplex (const TableExprId& id); 00090 virtual String getString (const TableExprId& id); 00091 00092 protected: 00093 Block<Int> fieldNrs_p; 00094 uInt lastEntry_p; 00095 00096 // Get the record for the last field number, thus going through 00097 // all subrecords for the other field numbers. 00098 const RecordInterface& getRecord (const TableExprId& id) const; 00099 }; 00100 00101 00102 00103 // <summary> 00104 // Array field in record select expression tree 00105 // </summary> 00106 00107 // <use visibility=local> 00108 00109 // <reviewed reviewer="UNKNOWN" date="before2004/08/25" tests=""> 00110 // </reviewed> 00111 // 00112 // <prerequisite> 00113 //# Classes you should understand before using this one. 00114 // <li> TableExprNode 00115 // </prerequisite> 00116 00117 // <synopsis> 00118 // This class represents a scalar column in a table select expression tree. 00119 // When the select expression gets evaluated, the value of the 00120 // given row in the column is used. 00121 // </synopsis> 00122 00123 00124 class TableExprNodeRecordFieldArray : public TableExprNodeArray 00125 { 00126 public: 00127 TableExprNodeRecordFieldArray (DataType dtype, 00128 const Block<Int>& fieldNumbers); 00129 ~TableExprNodeRecordFieldArray(); 00130 00131 virtual Bool isDefined (const TableExprId& id); 00132 virtual const IPosition& getShape (const TableExprId& id); 00133 00134 virtual Array<Bool> getArrayBool (const TableExprId& id); 00135 virtual Array<Int64> getArrayInt (const TableExprId& id); 00136 virtual Array<Double> getArrayDouble (const TableExprId& id); 00137 virtual Array<DComplex> getArrayDComplex (const TableExprId& id); 00138 virtual Array<String> getArrayString (const TableExprId& id); 00139 00140 protected: 00141 Block<Int> fieldNrs_p; 00142 uInt lastEntry_p; 00143 00144 // Get the record for the last field number, thus going through 00145 // all subrecords for the other field numbers. 00146 const RecordInterface& getRecord (const TableExprId& id) const; 00147 }; 00148 00149 00150 00151 00152 } //# NAMESPACE CASA - END 00153 00154 #endif