#ifndef TTOFChannelId_hxx_seen
#define TTOFChannelId_hxx_seen

#include "IChannelId.hxx"

namespace COMET { class ITOFChannelId; }

///Channel ID class for Channels using the TOF
///electronics hierachy.  Can answer detailed questions about its
///elements.  This should be used for constructing TTOFChannelIds from
///the information available.
class COMET::ITOFChannelId : public COMET::IChannelId {
public:
    ///Construct a TOF channel ID from a raw UInt_t
    explicit ITOFChannelId(UInt_t id =0);

    ///Constructor to specialise a Channel ID as a TOF channel ID
    explicit ITOFChannelId(const COMET::IChannelId& src);

    ///Construct a TOF channel ID from its electronics-space
    ///co-ordinates.  The sub-detector ID should be
    ///COMET::IChannelId::kTOF(=2), but is explicitly required.
    ITOFChannelId(UInt_t subDet, UInt_t Channel);
    ITOFChannelId(UInt_t subDet, UInt_t layer, UInt_t module);

    virtual ~ITOFChannelId();

    ///Format as a human readable string
    virtual std::string AsString() const;

    ///Get the layer
    virtual const UInt_t GetLayer() const;
    ///Get the module index
    virtual const UInt_t GetModule() const;
    /// Get the channel.
    virtual const UInt_t GetChannel() const;

protected:
    /// @{ Define the sub-detector specific part of the channel id.  The
    /// sub-detector specific part of the channel id is a 25 bit field with
    /// bits number from 0 (lsb) to 24 (msb).  The sub-fields are defined
    ///
    /// cccccccccccccccccccccccc
    ///
    ///    - c(25) Bits 0-24: A twentyfive bit field indicating which channel.
    ///
    /// Note: The shift and the least significant bit (lsb) must be the same.
    enum BitDefinitions {
      kChanMSB=24, kChanLSB=0,
      kLayerMSB=24, kLayerLSB=24,
      kModuleMSB=23, kModuleLSB=14
    };
    /// @}

private:

    /// Set the channel.
    virtual void SetChannel(int val);
    /// Set the layer.
    virtual void SetLayer(int val);
    /// Set the module.
    virtual void SetModule(int val);

    ClassDef(ITOFChannelId, 0)
};
#endif //TTOFChannelId_hxx_seen