casa6

/*

 * PointingDirectionCache.h

 *

 *  Created on: Dec 1, 2016

 *      Author: jjacobs

 */

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#ifndef MSVIS_MSVIS_POINTINGDIRECTIONCACHE_H_

#define MSVIS_MSVIS_POINTINGDIRECTIONCACHE_H_

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#include <casacore/measures/Measures/MDirection.h>

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#include <memory>

#include <vector>

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namespace casacore {

    class MDirection;

    class MeasurementSet;

    class MSPointingColumns;

}

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namespace casa {

namespace vi {

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struct Pointing;

class PointingDirectionCache;

class PointingSource;

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namespace pd_cache {

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// The namespace pd_cache contains the internal classes to the features provided

// by PointingDirectionCache.

​

enum class CacheAccessStatus : int {

    Hit,            // Found requested value in cache

    MissPrior,      // Desired value before earliest time in cache

    MissInternal,   // Desired value in between cache values

    MissPost        // Desired value is after last one in cache

};

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class AntennaLevelCache;

class TimeLevelCache;

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bool timeMatch (double time, double rowsTime, double rowsInterval);

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class TimeLevelEntry {

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public:

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    TimeLevelEntry () = delete;

    TimeLevelEntry (const Pointing &, const TimeLevelCache *);

    TimeLevelEntry (const TimeLevelEntry &);

    ~TimeLevelEntry ();

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    TimeLevelEntry& operator= (const TimeLevelEntry & other);

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    const casacore::MDirection * getDirection () const;

    double getInterval () const;

    double getTime () const;

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private:

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    mutable std::unique_ptr<casacore::MDirection> direction_p; // own

    int    row_p;

    double timeCenter_p;

    const TimeLevelCache * timeLevelCache_p;

    double interval_p;

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    const PointingSource * getPointingSource () const;

};

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bool operator== (double t, const TimeLevelEntry &);

bool operator== (const TimeLevelEntry &, double t);

bool operator< (double t, const TimeLevelEntry &);

bool operator< (const TimeLevelEntry &, double t);

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class TimeLevelCache {

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public:

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    TimeLevelCache (int minTimes, int maxTimes, const AntennaLevelCache * );

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    void addEntry (Pointing & pointing);

    void flush ();

    std::pair<CacheAccessStatus, const casacore::MDirection *> getPointingDirection (double time);

    const PointingSource * getPointingSource () const;

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private:

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    typedef std::vector<TimeLevelEntry> Cache;

    const AntennaLevelCache * antennaLevelCache_p;