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CdbBdbSConditionAtClusterPItr.hh

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#ifndef CDBBDBSHARED_CONDITION_AT_CLUSTER_P_ITR_HH
#define CDBBDBSHARED_CONDITION_AT_CLUSTER_P_ITR_HH

// File and Version Information:
//      $Id: CdbBdbSConditionAtClusterPItr.hh,v 1.4 2003/08/13 23:36:20 gapon Exp $

#include "BdbUtil/Bdb.hh"

#include "CdbBase/CdbCommon.hh"
#include "CdbBase/CdbIItr.hh"

#include "CdbBdbShared/CdbBdbSClusterP.hh"
#include "CdbBdbShared/CdbBdbSConditionP.hh"

/// The internal implementation for the iterator of persistent conditions at a cluster.
/**
  * This class provides the actual implementation of the corresponding
  * iterator interface.
  *
  * @see CdbIItr
  * @see CdbIItr::InterfaceType
  * @see CdbIItr::ValueType
  */
class CdbBdbSConditionAtClusterPItr : public CdbIItr< BdbRef(CdbBdbSConditionP) > {

public:

    typedef CdbIItr< BdbRef(CdbBdbSConditionP) >::ValueType     ValueType;
    typedef CdbIItr< BdbRef(CdbBdbSConditionP) >::InterfaceType InterfaceType;

private:

  /// The copy constructor (IS DISABLED)
  /**
    * This is beause the ooMapItr class does not have the copy constructor too.
    */
    CdbBdbSConditionAtClusterPItr( const CdbBdbSConditionAtClusterPItr& theItr );

  /// The assignment operator (IS DISABLED)
  /**
    * This is beause the ooMapItr class does not have the assignment operator too.
    */
    CdbBdbSConditionAtClusterPItr& operator=( const CdbBdbSConditionAtClusterPItr& theItr );

public:

  /// The normal and default constructor
  /**
    */
    CdbBdbSConditionAtClusterPItr( const BdbRef(CdbBdbSClusterP)& theClusterRef     /**< a cluster with the collection of conditions */
                                 );

  /// The destructor
  /**
    * Details...
    */
    virtual ~CdbBdbSConditionAtClusterPItr( );

  /// Reset an iterator to its initial state.
  /**
    * This implements the corresponding method of the base class.
    *
    * @see CdbIItr::reset
    * @see CdbStatus
    */
    virtual CdbStatus reset( );

  /// Advance an iterator to the next position.
  /**
    * This implements the corresponding method of the base class.
    *
    * @see CdbIItr::next()
    */
    virtual bool next( );

  /// Obtain the currently reffered value.
  /**
    * This implements the corresponding method of the base class.
    *
    * @see CdbIItr::value()
    * @see CdbIItr::ValueType
    *
    * @return the current value the iterator is set on
    */
    virtual ValueType value( );

  /// Check if an iterator is valid.
  /**
    * This implements the corresponding method of the base class.
    *
    * @see CdbIItr::isValid()
    */
    virtual bool isValid( );

  /// Make a clone of itself
  /**
    * @see CdbIItr::clone()
    *
    * WARNING: The current implementation of this method will return an instance
    *          reset to the original state, as if no "next" method has ever been
    *          called against it, even if the original instance is already
    *          in the "isValid = true" state.
    *          The reason of this is that ooItr does not have neither copy ctor,
    *          nor the assignment operator.
    */
    virtual InterfaceType* clone( ) const;

private:

    bool _isValid;
    bool _hasEverBeenAdvanced;

    BdbRef(CdbBdbSClusterP)   _clusterRef;
    BdbRef(CdbBdbSConditionP) _valueRef;

    BdbItr(CdbBdbSConditionP) _itr;
};

#endif  // CDBBDBSHARED_CONDITION_AT_CLUSTER_P_ITR_HH

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