NetworkTables/Key.h

/*----------------------------------------------------------------------------*/
/* Copyright (c) FIRST 2011. All Rights Reserved.                             */
/* Open Source Software - may be modified and shared by FRC teams. The code   */
/* must be accompanied by the FIRST BSD license file in $(WIND_BASE)/WPILib.  */
/*----------------------------------------------------------------------------*/

#ifndef __KEY_H__
#define __KEY_H__

#include "NetworkTables/Data.h"
#include "NetworkTables/InterfaceConstants.h"

#include <map>
#include <string>

class NetworkTable;

namespace NetworkTables
{

class Entry;

class Key : public Data
{
        friend class Connection;
        friend class Entry;
        friend class KeyConnectionListener;
        friend class NetworkTable;
public:
        Key(NetworkTable *table, const char *keyName);
        virtual ~Key();
        NetworkTable *GetTable() {return m_table;}
        NetworkTables_Types GetType();
        Entry *GetEntry() {return m_entry.get();}
        std::string GetName() {return m_name;}
        UINT32 GetId() {return m_id;}
        void Encode(Buffer *buffer);

        static Key *GetKey(UINT32 id);

private:
        std::auto_ptr<Entry> SetEntry(std::auto_ptr<Entry> entry);
        bool HasEntry() {return m_entry.get() != NULL;}
        void EncodeName(Buffer *buffer);

        static UINT32 AllocateId();

        NetworkTable *m_table;
        std::string m_name;
        // Keys are responsible for entrys' memory
        std::auto_ptr<Entry> m_entry;
        UINT32 m_id;

        static SEM_ID _staticLock;
        static std::map<UINT32, Key *> _idsMap;
        static UINT32 _currentId;
};

} // namespace

#endif