BaseType.h

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// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
 
// Copyright (c) 2002,2003 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//         Dan Holloway <dan@hollywood.gso.uri.edu>
//         Reza Nekovei <reza@intcomm.net>
//
// 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.
 
// (c) COPYRIGHT URI/MIT 1994-1999
// Please read the full copyright statement in the file COPYRIGHT_URI.
//
// Authors:
//      jhrg,jimg       James Gallagher <jgallagher@gso.uri.edu>
//      dan             Dan Holloway <dan@hollywood.gso.uri.edu>
//      reza            Reza Nekovei <reza@intcomm.net>
 
// Abstract base class for the variables in a dataset. This is used to store
// the type-invariant information that describes a variable as given in the
// DODS API.
//
// jhrg 9/6/94
 
#ifndef _basetype_h
#define _basetype_h 1
 
#include <iostream>
#include <stack>
#include <string>
#include <vector>
 
#include "AttrTable.h"
#include "D4AttributeType.h"
#include "D4Attributes.h"
 
#include "InternalErr.h"
 
#include "Type.h"
#include "dods-datatypes.h"
 
#include "DapObj.h"
 
using namespace std;
 
class Crc32;
 
namespace libdap {
 
class ConstraintEvaluator;
 
class DDS;
class Marshaller;
class UnMarshaller;
 
class Constructor;
class XMLWrter;
 
class DMR;
class D4Group;
class XMLWriter;
class D4StreamMarshaller;
class D4StreamUnMarshaller;
 
class D4Attributes;

 
class BaseType : public DapObj {
private:
    string d_name;    // name of the instance
    Type d_type;      // instance's type
    string d_dataset; // name of the dataset used to create this BaseType
 
    bool d_is_read; // true if the value has been read
    bool d_is_send; // Is the variable in the projection?
 
    // d_parent points to the Constructor or Vector which holds a particular
    // variable. It is null for simple variables. The Vector and Constructor
    // classes must maintain this variable.
    BaseType *d_parent;
 
    // Attributes for this variable. Added 05/20/03 jhrg
    AttrTable d_attr;
 
    D4Attributes *d_attributes;
 
    bool d_is_dap4; // True if this is a DAP4 variable, false ... DAP2
 
    // These are non-empty only for DAP4 variables. Added 9/27/12 jhrg
 
    // These were/are used for DAP2 CEs, but not for DAP4 ones
    bool d_in_selection;   // Is the variable in the selection?
    bool d_is_synthesized; // true if the variable is synthesized
 
protected:
    void m_duplicate(const BaseType &bt);
 
public:
    typedef stack<BaseType *> btp_stack;
 
    // These ctors assume is_dap4 is false
    BaseType(const string &n, const Type &t, bool is_dap4 = false);
    BaseType(const string &n, const string &d, const Type &t, bool is_dap4 = false);
 
    BaseType(const BaseType &copy_from);
    ~BaseType() override;
 
    virtual string toString();
 
    virtual void transform_to_dap4(D4Group *root, Constructor *container);
    virtual std::vector<BaseType *> *transform_to_dap2(AttrTable *parent_attr_table);
 
    void dump(ostream &strm) const override;
 
    BaseType &operator=(const BaseType &rhs);

    virtual void clear_local_data() { set_read_p(false); }
 
    virtual bool is_dap4() const { return d_is_dap4; }
    virtual void set_is_dap4(const bool v) { d_is_dap4 = v; }

    virtual BaseType *ptr_duplicate() = 0;
 
    virtual string name() const;
    virtual void set_name(const string &n);
    virtual std::string FQN() const;
 
    virtual Type type() const;
    virtual void set_type(const Type &t);
    virtual string type_name() const;
 
    virtual string dataset() const;

    virtual int length() const { return 1; }

    virtual int64_t length_ll() const { return 1; }

    virtual void set_length(int64_t) { /* empty since the length of a BaseType is always one element. jhrg 8/12/22 */ }

    virtual void set_length_ll(int64_t) { /* empty since the length of a BaseType is always one element. jhrg 8/12/22 */
    }
 
    virtual bool is_simple_type() const;
    virtual bool is_vector_type() const;
    virtual bool is_constructor_type() const;
 
    virtual bool synthesized_p();
    virtual void set_synthesized_p(bool state);
 
    virtual int element_count(bool leaves = false);
 
    virtual bool read_p();
    virtual void set_read_p(bool state);
 
    virtual bool send_p();
    virtual void set_send_p(bool state);
 
    virtual AttrTable &get_attr_table();
    virtual void set_attr_table(const AttrTable &at);
 
    // DAP4 attributes
    virtual D4Attributes *attributes();
    virtual void set_attributes(D4Attributes *);
    virtual void set_attributes_nocopy(D4Attributes *);
 
    virtual bool is_in_selection();
    virtual void set_in_selection(bool state);
 
    virtual void set_parent(BaseType *parent);
    virtual BaseType *get_parent() const;
 
    virtual BaseType *get_ancestor();
 
    virtual void transfer_attributes(AttrTable *at);
 
    // I put this comment here because the version in BaseType.cc does not
    // include the exact_match or s variables since they are not used. Doxygen
    // was gaging on the comment.

    virtual BaseType *var(const string &name = "", bool exact_match = true, btp_stack *s = nullptr);
    virtual BaseType *var(const string &name, btp_stack &s);
 
    virtual void add_var(BaseType *bt, Part part = nil);
    virtual void add_var_nocopy(BaseType *bt, Part part = nil);
 
    virtual bool read();
 
    virtual bool check_semantics(string &msg, bool all = false);
 
    virtual bool ops(BaseType *b, int op);
    virtual bool d4_ops(BaseType *b, int op);
 
    virtual unsigned int width(bool constrained = false) const;
 
    virtual int64_t width_ll(bool constrained = false) const;
 
    virtual void print_decl(FILE *out, string space = "    ", bool print_semi = true, bool constraint_info = false,
                            bool constrained = false);
 
    virtual void print_xml(FILE *out, string space = "    ", bool constrained = false);
 
    virtual void print_decl(ostream &out, string space = "    ", bool print_semi = true, bool constraint_info = false,
                            bool constrained = false);
 
    virtual void print_xml(ostream &out, string space = "    ", bool constrained = false);
 
    virtual void print_xml_writer(XMLWriter &xml, bool constrained = false);
 
    virtual void print_dap4(XMLWriter &xml, bool constrained = false);


    virtual unsigned int buf2val(void **val) = 0;

    virtual unsigned int val2buf(void *val, bool reuse = false) = 0;

    virtual void intern_data(ConstraintEvaluator &eval, DDS &dds);

    virtual bool serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval = true);

    virtual void compute_checksum(Crc32 &checksum) = 0;
 
    virtual void intern_data();

    virtual void serialize(D4StreamMarshaller &m, DMR &dmr, bool filter = false);

    virtual bool deserialize(UnMarshaller &um, DDS *dds, bool reuse = false);

    virtual void deserialize(D4StreamUnMarshaller &um, DMR &dmr);

 
    virtual void print_val(FILE *out, string space = "", bool print_decl_p = true);

    virtual void print_val(ostream &out, string space = "", bool print_decl_p = true) = 0;
 
    virtual bool is_dap4_projected(std::vector<string> &projected_dap4_inventory);
};
 
} // namespace libdap
 
#endif // _basetype_h