mirror of https://github.com/SeanOMik/libki.git
82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
#pragma once
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#include <string>
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#include <vector>
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#include <map>
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#include <typeinfo>
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#include <rapidxml.hpp>
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#include "../util/Serializable.h"
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namespace ki
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{
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namespace dml
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{
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class Record;
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/**
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* An abstract base class for DML fields.
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*/
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class FieldBase : public util::Serializable
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{
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friend Record;
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public:
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virtual ~FieldBase() = default;
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const Record &get_record() const;
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std::string get_name() const;
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bool is_transferable() const;
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template <typename ValueT>
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bool is_type() const
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{
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return (typeid(ValueT).hash_code() == m_type_hash);
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}
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virtual const char *get_type_name() const = 0;
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/**
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* Creates an XML node from this field's data.
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*
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* The document is only used to allocate necessary resources, and
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* so the returned node has not been appended to the document.
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*/
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virtual rapidxml::xml_node<> *as_xml(rapidxml::xml_document<> &doc) const = 0;
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/**
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* Loads data from an XML Field node into this field.
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* Example: <FieldName TYPE="STR">Value</FieldName>
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*
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* If the field in the XML data does not have the same type
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* as this field, then an exception is thrown.
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*/
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virtual void from_xml(const rapidxml::xml_node<> *node) = 0;
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/**
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* Creates a new Field from XML data.
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*/
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static FieldBase *create_from_xml(const Record& record, const rapidxml::xml_node<> *node);
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protected:
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std::string m_name;
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bool m_transferable;
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size_t m_type_hash;
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FieldBase(std::string name, const Record& record);
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/**
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* Returns a new Field with the same name, transferability
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* and value but with a different owner Record.
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*/
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virtual FieldBase *clone(const Record &record) const = 0;
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/**
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* Copies the value of another Field into this one
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* if the types are the same.
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*/
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virtual void set_value(FieldBase *other) = 0;
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private:
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const Record &m_record;
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};
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typedef std::vector<FieldBase *> FieldList;
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typedef std::map<std::string, FieldBase *> FieldNameMap;
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}
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}
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