D4RValue.h
// -*- mode: c++; c-basic-offset:4 -*-
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
// Copyright (c) 2014 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
#ifndef _D4RValue_h
#define _D4RValue_h
#include <vector>
#include <string>
#include <dods-datatypes.h>
#include <D4Function.h>
namespace libdap
{
class BaseType;
class D4RValue;
// Factory class to build RValue objects. User by the parser/ce-evaluator
D4RValue *D4RValueFactory(std::string cpps);
class D4RValueList
{
private:
std::vector<D4RValue *> d_rvalues;
void m_duplicate(const D4RValueList &src);
public:
typedef std::vector<D4RValue *>::iterator iter;
D4RValueList() { }
D4RValueList(const D4RValueList &src) { m_duplicate(src); }
D4RValueList(D4RValue *rv) { add_rvalue(rv); }
virtual ~D4RValueList();
D4RValueList &operator=(const D4RValueList &rhs) {
if (this == &rhs) return *this;
m_duplicate(rhs);
return *this;
}
void add_rvalue(D4RValue *rv) {
d_rvalues.push_back(rv);
}
D4RValue *get_rvalue(unsigned int i) {
return d_rvalues.at(i);
}
iter begin() { return d_rvalues.begin(); }
iter end() { return d_rvalues.end(); }
unsigned int size() const { return d_rvalues.size(); }
};
class D4RValue
{
public:
enum value_kind {
unknown,
basetype,
function,
constant
};
private:
BaseType *d_variable; // This is a weak pointer; do not delete
D4Function d_func; // (weak) pointer to a function returning BaseType *
D4RValueList *d_args; // pointer to arguments to the function; delete
BaseType *d_constant; // pointer; delete.
value_kind d_value_kind;
void m_duplicate(const D4RValue &src);
friend class D4RValueList;
public:
D4RValue() : d_variable(0), d_func(0), d_args(0), d_constant(0), d_value_kind(unknown) { }
D4RValue(const D4RValue &src) { m_duplicate(src); }
D4RValue(BaseType *btp) : d_variable(btp), d_func(0), d_args(0), d_constant(0), d_value_kind(basetype) { }
D4RValue(D4Function f, D4RValueList *args) : d_variable(0), d_func(f), d_args(args), d_constant(0), d_value_kind(function) { }
D4RValue(unsigned long long ui);
D4RValue(long long i);
D4RValue(double r);
D4RValue(std::string s);
D4RValue(std::vector<dods_byte> &byte_args);
D4RValue(std::vector<dods_int8> &byte_int8);
D4RValue(std::vector<dods_uint16> &byte_uint16);
D4RValue(std::vector<dods_int16> &byte_int16);
D4RValue(std::vector<dods_uint32> &byte_uint32);
D4RValue(std::vector<dods_int32> &byte_int32);
D4RValue(std::vector<dods_uint64> &byte_uint64);
D4RValue(std::vector<dods_int64> &byte_int64);
D4RValue(std::vector<dods_float32> &byte_float32);
D4RValue(std::vector<dods_float64> &byte_float64);
virtual ~D4RValue();
D4RValue &operator=(D4RValue &rhs) {
if (this == &rhs)
return *this;
m_duplicate(rhs);
return *this;
}
value_kind get_kind() const { return d_value_kind; }
// This is the call that will be used to return the value of a function.
// jhrg 3/10/14
virtual BaseType *value(DMR &dmr);
// And this optimizes value() for filters, where functions are not supported.
virtual BaseType *value();
};
} // namespace libdap
#endif // _RValue_h
libdap::BaseType
The basic data type for the DODS DAP types.
Definition: BaseType.h:118
libdap::D4RValueList
Definition: D4RValue.h:45
libdap::D4RValue
Definition: D4RValue.h:86
libdap::D4RValue::get_kind
value_kind get_kind() const
What kind of thing holds the value Values in DAP4 constraints are either constants,...
Definition: D4RValue.h:150
libdap::D4RValue::value
virtual BaseType * value()
Get the value for a RValue object.
Definition: D4RValue.cc:300
libdap::DMR
Definition: DMR.h:55
libdap
top level DAP object to house generic methods
Definition: AlarmHandler.h:36
libdap::D4RValueFactory
D4RValue * D4RValueFactory(std::string cpps)
Build an appropriate RValue.
Definition: D4RValue.cc:218