context.h

/*******************************************************************************
 * Copyright (C) 2015-2019 Commissariat a l'energie atomique et aux energies alternatives (CEA)
 * Copyright (C) 2021 Institute of Bioorganic Chemistry Polish Academy of Science (PSNC)
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
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 *   endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#ifndef PDI_CONTEXT_H_
#define PDI_CONTEXT_H_

#include <functional>
#include <memory>
#include <string>
#include <unordered_map>

#include <pdi/pdi_fwd.h>
#include <pdi/callbacks.h>
#include <pdi/data_descriptor.h>
#include <pdi/datatype_template.h>
#include <pdi/logger.h>
#include <pdi/ref_any.h>


namespace PDI {

class PDI_EXPORT Context
{
public:
    class Iterator
    {
        friend class Context;
        std::unordered_map<std::string, std::unique_ptr<Data_descriptor>>::iterator m_data;
        Iterator(const std::unordered_map<std::string, std::unique_ptr<Data_descriptor>>::iterator& data);
        Iterator(std::unordered_map<std::string, std::unique_ptr<Data_descriptor>>::iterator&& data);
    public:
        Data_descriptor* operator-> ();
        Data_descriptor& operator* ();
        Iterator& operator++ ();
        bool operator!= (const Iterator&);
    };
    
    typedef std::function<Datatype_template_uptr(Context&, PC_tree_t)> Datatype_template_parser;
    
protected:
    Iterator get_iterator(const std::unordered_map<std::string, std::unique_ptr<Data_descriptor>>::iterator& data);
    
    Iterator get_iterator(std::unordered_map<std::string, std::unique_ptr<Data_descriptor>>::iterator&& data);
    
public:
    virtual ~Context();
    
    virtual Data_descriptor& desc(const std::string& name) = 0;
    
    virtual Data_descriptor& desc(const char* name) = 0;
    
    virtual Data_descriptor& operator[](const std::string& name) = 0;
    
    virtual Data_descriptor& operator[](const char* name) = 0;
    
    virtual Iterator begin() = 0;
    
    virtual Iterator end() = 0;
    
    virtual void event(const char* name) = 0;
    
    virtual Logger& logger() = 0;
    
    virtual Callbacks& callbacks() = 0;
    
    virtual Datatype_template_uptr datatype(PC_tree_t node) = 0;
    
    virtual void add_datatype(const std::string& name, Datatype_template_parser parser) = 0;
    
    virtual void finalize_and_exit() = 0;
};

} // namespace PDI

#endif // PDI_CONTEXT_H_