00001 //# MSStateParse.h: Classes to hold results from field grammar parser 00002 //# Copyright (C) 1994,1995,1997,1998,1999,2000,2001,2003 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 //# $Id$ 00027 00028 #ifndef MS_MSSTATEPARSE_H 00029 #define MS_MSSTATEPARSE_H 00030 00031 //# Includes 00032 #include <casacore/casa/aips.h> 00033 #include <casacore/ms/MSSel/MSParse.h> 00034 #include <casacore/ms/MSSel/MSSelectionError.h> 00035 #include <casacore/ms/MSSel/MSSelectionErrorHandler.h> 00036 #include <casa/Utilities/CountedPtr.h> 00037 namespace casacore { //# NAMESPACE CASACORE - BEGIN 00038 00039 //# Forward 00040 // <summary> 00041 // Class to hold values from field grammar parser 00042 // </summary> 00043 00044 // <use visibility=local> 00045 00046 // <reviewed reviewer="" date="" tests=""> 00047 // </reviewed> 00048 00049 // <prerequisite> 00050 //# Classes you should understand before using this one. 00051 // </prerequisite> 00052 00053 // <etymology> 00054 // MSStateParse is the class used to parse a field command. 00055 // </etymology> 00056 00057 // <synopsis> 00058 // MSStateParse is used by the parser of field sub-expression statements. 00059 // The parser is written in Bison and Flex in files MSStateGram.y and .l. 00060 // The statements in there use the routines in this file to act 00061 // upon a reduced rule. 00062 // Since multiple tables can be given (with a shorthand), the table 00063 // names are stored in a list. The variable names can be qualified 00064 // by the table name and will be looked up in the appropriate table. 00065 // 00066 // The class MSStateParse only contains information about a table 00067 // used in the table command. Global variables (like a list and a vector) 00068 // are used in MSStateParse.cc to hold further information. 00069 // 00070 // Global functions are used to operate on the information. 00071 // The main function is the global function msStateCommand. 00072 // It executes the given STaQL command and returns the resulting ms. 00073 // This is, in fact, the only function to be used by a user. 00074 // </synopsis> 00075 00076 // <motivation> 00077 // It is necessary to be able to give a ms command in ASCII. 00078 // This can be used in a CLI or in the table browser to get a subset 00079 // of a table or to sort a table. 00080 // </motivation> 00081 00082 //# <todo asof="$DATE:$"> 00083 //# A List of bugs, limitations, extensions or planned refinements. 00084 //# </todo> 00085 00086 00087 class MSStateParse : public MSParse 00088 { 00089 public: 00090 // Default constructor 00091 MSStateParse(); 00092 00093 // Associate the ms and the shorthand. 00094 MSStateParse (const MeasurementSet* ms); 00095 00096 const TableExprNode* selectStateIds(const Vector<Int>& stateIDs); 00097 00098 // Get table expression node object. 00099 static const TableExprNode* node(); 00100 static MSStateParse* thisMSSIParser; 00101 //static CountedPtr<MSSelectionErrorHandler> thisMSSErrorHandler; 00102 static MSSelectionErrorHandler* thisMSSErrorHandler; 00103 static Vector<Int> selectedIDs() {return idList;}; 00104 static void reset(){idList.resize(0);}; 00105 static void cleanupNode() {if (node_p) delete node_p;node_p=0x0;} 00106 static void cleanupErrorHandler() 00107 {if (thisMSSErrorHandler) delete thisMSSErrorHandler;thisMSSErrorHandler=0x0;} 00108 static void cleanup() {cleanupNode(); cleanupErrorHandler();} 00109 private: 00110 static TableExprNode* node_p; 00111 const String colName; 00112 static Vector<Int> idList; 00113 }; 00114 00115 } //# NAMESPACE CASACORE - END 00116 00117 #endif