datatype_template.h

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#ifndef PDI_DATATYPE_TEMPLATE_H_
#define PDI_DATATYPE_TEMPLATE_H_
 
#include <memory>
#include <string>
#include <unordered_map>
 
#include <paraconf.h>
 
#include <pdi/expression.h>
#include <pdi/pdi_fwd.h>
 
namespace PDI {
 
using Attributes_map = std::unordered_map<std::string, Expression>;
 
class PDI_EXPORT Datatype_template: public std::enable_shared_from_this<Datatype_template>
{
protected:
    Attributes_map m_attributes;
    
public:
    Datatype_template(const Attributes_map& attributes = {});
    
    Datatype_template(PC_tree_t datatype_tree);
    
    virtual ~Datatype_template();
    
    virtual Datatype_sptr evaluate(Context& ctx) const = 0;
    
    Expression attribute(const std::string& attribute_name) const;
    
    const Attributes_map& attributes() const;
    
    static void load_basic_datatypes(Context& ctx);
    
    static void load_user_datatypes(Context& ctx, PC_tree_t types_tree);
    
};
 
} // namespace PDI
 
#endif // PDI_DATATYPE_TEMPLATE_H_