dbc_statement_handler.h

// SPDX-License-Identifier: MIT
#ifndef DBC_STATEMENT_HANDLER_H
#define DBC_STATEMENT_HANDLER_H
 
#include "dbc_database.h"
#include "typefactory.h"
#include <string>
#include <unordered_map>
 
struct DbcParseContext {
    DbcDatabase &database;
    FrameInfo *currentFrame = nullptr;
};
 
class DbcStatementHandler {
public:
    virtual ~DbcStatementHandler() = default;
    virtual void Handle(const std::string &line, DbcParseContext &context) const = 0;
};
 
class DbcFrameHandler : public DbcStatementHandler {
public:
    void Handle(const std::string &line, DbcParseContext &context) const override;
 
private:
    static FrameInfo ParseFrameLine(const std::string &line);
};
 
class DbcSignalHandler : public DbcStatementHandler {
public:
    void Handle(const std::string &line, DbcParseContext &context) const override;
 
private:
    static SignalInfo ParseSignalLine(const std::string &line);
};
 
class DbcCommentHandler : public DbcStatementHandler {
public:
    void Handle(const std::string &line, DbcParseContext &context) const override;
 
private:
    static void ParseCommentLine(const std::string &line, DbcDatabase &database);
};
 
class DbcStatementDispatcher {
public:
    DbcStatementDispatcher();
 
    template<class Handler>
    void RegisterType(const std::string &keyword) {
        m_factory.registerType<Handler>(keyword);
        m_handlers.insert_or_assign(keyword, m_factory.create(keyword));
    }
 
    bool Dispatch(const std::string &line, DbcParseContext &context) const;
 
private:
    TypeFactory<std::string, DbcStatementHandler> m_factory;
    std::unordered_map<std::string, std::shared_ptr<DbcStatementHandler>> m_handlers;
};
 
#endif /* DBC_STATEMENT_HANDLER_H */