libdap  Updated for version 3.17.0
D4RValue.h
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) 2014 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00023 //
00024 // You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
00025 
00026 #ifndef _D4RValue_h
00027 #define _D4RValue_h
00028 
00029 #include <vector>
00030 
00031 #include <dods-datatypes.h>
00032 #include <D4Function.h>
00033 
00034 namespace libdap
00035 {
00036 
00037 class BaseType;
00038 class D4Constant;
00039 class D4RValue;
00040 
00041 class D4RValueList
00042 {
00043 private:
00044         std::vector<D4RValue *> d_rvalues;
00045 
00046 public:
00047         typedef std::vector<D4RValue *>::iterator iter;
00048 
00049         D4RValueList() { }
00050         D4RValueList(D4RValue *rv) { add_rvalue(rv); }
00051 
00052         ~D4RValueList();
00053 
00054         void add_rvalue(D4RValue *rv) {
00055                 d_rvalues.push_back(rv);
00056         }
00057 
00058         D4RValue *get_rvalue(unsigned int i) {
00059                 return d_rvalues.at(i);
00060         }
00061 
00062         iter begin() { return d_rvalues.begin(); }
00063         iter end() { return d_rvalues.end(); }
00064 
00065         unsigned int size() const { return d_rvalues.size(); }
00066 
00067 };
00068 
00072 class D4RValue
00073 {
00074 private:
00075     BaseType *d_variable;       // This is a weak pointer
00076 
00077     D4Function d_func;          // (weak) Pointer to a function returning BaseType *
00078     D4RValueList *d_args;       // Strong pointer to arguments to the function; delete
00079 
00080     BaseType *d_constant;       // Strong pointer; delete
00081 
00082     enum value_kind {
00083         unknown,
00084         basetype,
00085         function,
00086         constant
00087     };
00088 
00089     value_kind d_value_kind;
00090 
00091     friend class D4RValueList;
00092 
00093 public:
00094     D4RValue() : d_variable(0), d_func(0), d_args(0), d_constant(0), d_value_kind(unknown) { }
00095 
00096     D4RValue(BaseType *btp)  : d_variable(btp), d_func(0), d_args(0), d_constant(0), d_value_kind(basetype) { }
00097     D4RValue(D4Function f, D4RValueList *args)  : d_variable(0), d_func(f), d_args(args), d_constant(0), d_value_kind(function) { }
00098 
00099     D4RValue(unsigned long long ui);
00100     D4RValue(long long i);
00101     D4RValue(double r);
00102     D4RValue(std::string s);
00103     D4RValue(std::vector<dods_byte> &byte_args);
00104     D4RValue(std::vector<dods_int8> &byte_int8);
00105     D4RValue(std::vector<dods_uint16> &byte_uint16);
00106     D4RValue(std::vector<dods_int16> &byte_int16);
00107     D4RValue(std::vector<dods_uint32> &byte_uint32);
00108     D4RValue(std::vector<dods_int32> &byte_int32);
00109     D4RValue(std::vector<dods_uint64> &byte_uint64);
00110     D4RValue(std::vector<dods_int64> &byte_int64);
00111     D4RValue(std::vector<dods_float32> &byte_float32);
00112     D4RValue(std::vector<dods_float64> &byte_float64);
00113 
00114     virtual ~D4RValue();
00115 
00116     // This is the call that will be used to return the value of a function.
00117     // jhrg 3/10/14
00118     BaseType *value(DMR &dmr);
00119 };
00120 
00121 } // namespace libdap
00122 #endif // _RValue_h