00001 00002 // -*- mode: c++; c-basic-offset:4 -*- 00003 00004 // This file is part of libdap, A C++ implementation of the OPeNDAP Data 00005 // Access Protocol. 00006 00007 // Copyright (c) 2002,2003 OPeNDAP, Inc. 00008 // Author: James Gallagher <jgallagher@opendap.org> 00009 // 00010 // This library is free software; you can redistribute it and/or 00011 // modify it under the terms of the GNU Lesser General Public 00012 // License as published by the Free Software Foundation; either 00013 // version 2.1 of the License, or (at your option) any later version. 00014 // 00015 // This library is distributed in the hope that it will be useful, 00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00018 // Lesser General Public License for more details. 00019 // 00020 // You should have received a copy of the GNU Lesser General Public 00021 // License along with this library; if not, write to the Free Software 00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00023 // 00024 // You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112. 00025 00026 // (c) COPYRIGHT URI/MIT 1995-1999 00027 // Please first read the full copyright statement in the file COPYRIGHT_URI. 00028 // 00029 // Authors: 00030 // jhrg,jimg James Gallagher <jgallagher@gso.uri.edu> 00031 00032 // Interface for the CE Clause class. 00033 00034 #ifndef _clause_h 00035 #define _clause_h 00036 00037 00038 #ifndef _expr_h 00039 #include "expr.h" 00040 #endif 00041 00042 #ifndef _rvalue_h 00043 #include "RValue.h" 00044 #endif 00045 00087 struct Clause 00088 { 00089 00090 private: 00092 int _op; 00094 bool_func _b_func; 00097 btp_func _bt_func; 00098 00099 int _argc; // arg count 00100 rvalue *_arg1; // only for operator 00101 rvalue_list *_args; // vector arg 00102 00103 Clause(const Clause &) 00104 {} 00105 Clause &operator=(const Clause &) 00106 { 00107 throw InternalErr(__FILE__, __LINE__, "Unimplemented method"); 00108 } 00109 00110 public: 00111 Clause(const int oper, rvalue *a1, rvalue_list *rv); 00112 Clause(bool_func func, rvalue_list *rv); 00113 Clause(btp_func func, rvalue_list *rv); 00114 Clause(); 00115 00116 virtual ~Clause(); 00117 00118 bool OK(); 00119 00120 bool boolean_clause(); 00121 00122 bool value_clause(); 00123 00124 bool value(const string &dataset, DDS &dds); 00125 00126 bool value(const string &dataset, DDS &dds, BaseType **value); 00127 }; 00128 00129 #endif // _clause_h