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CdbBdbSCollectionNameItr.cc

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// File and Version Information:
//      $Id: CdbBdbSCollectionNameItr.cc,v 1.6 2002/09/23 22:41:07 gapon Exp $

/// Implementation file for the CdbBdbSCollectionNameItr class.
/**
  * @see CdbBdbSCollectionNameItr
  */

#include "BaBar/BaBar.hh"

#include "CdbBdbShared/CdbBdbSCollectionNameItr.hh"

#include "CdbBdbShared/CdbBdbSCollectionElementP.hh"

#include <assert.h>

CdbBdbSCollectionNameItr::CdbBdbSCollectionNameItr( const BdbRef( BdbMap )& theMapRef ) :
    _isValid(false),
    _hasEverBeenAdvanced(false),
    _mapRef(theMapRef)
{
    assert( ! BdbIsNull(theMapRef));
}

CdbBdbSCollectionNameItr::~CdbBdbSCollectionNameItr( )
{ }

CdbStatus
CdbBdbSCollectionNameItr::reset( )
{
    _isValid             = false;
    _hasEverBeenAdvanced = false;

    return CdbStatus::Success;
}

bool
CdbBdbSCollectionNameItr::next( )
{
    if( ! _hasEverBeenAdvanced ) _mapItr = _mapRef;

    if( _mapItr.next( )) {

        BdbHandle(CdbBdbSCollectionElementP) eH;
        eH = (const BdbRef(CdbBdbSCollectionElementP)&) (_mapItr->oid( ));

        if( ! BdbIsNull(eH) && eH.isValid( )) {

            _value = eH->name( );

            _isValid             = true;
            _hasEverBeenAdvanced = true;
        }

    } else {

      // We're beyond the end of the collection

        _isValid             = false;
        _hasEverBeenAdvanced = false;
    }
    return _isValid;
}

CdbBdbSCollectionNameItr::ValueType
CdbBdbSCollectionNameItr::value( )
{
    if( ! _isValid ) {
        assert( 0 );        // FATAL ERROR: Inproper use of the iterator!!!
        return 0;
    }
    return _value.head( );
}

bool
CdbBdbSCollectionNameItr::isValid( )
{
    return _isValid;
}

CdbBdbSCollectionNameItr::InterfaceType*
CdbBdbSCollectionNameItr::clone( ) const
{
  // Note, that the resulting iterator will always be at the initial
  // state, even if the current one is not. See more details at the
  // header file.

    return new CdbBdbSCollectionNameItr( _mapRef );
}

/////////////////
// End Of File //
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