cHierDatabaseIter::cHierDatabaseIter( cHierDatabase* pDb ) //throw(eArchive)
: mpDb ( pDb ),
mCurPath( )
{
ASSERT( pDb != 0);
mCurPath.SetCaseSensitive ( mpDb->IsCaseSensitive() );
mCurPath.SetDelimiter ( mpDb->GetDelimitingChar() );
//
// load in the root array...
//
SeekToRoot();
}
///////////////////////////////////////////////////////////////////////////////
// SeekToDirectory
///////////////////////////////////////////////////////////////////////////////
bool cDbDataSourceIter::SeekToDirectory( const cFCOName& parentName, bool bCreate )
{
cDebug d( "cDbDataSourceIter::SeekToDirectory" );
//
// the first task is to ascend until we are in a directory that we can descend into to
// reach parentName...
//
cFCOName curParent = GetParentName();
d.TraceDebug( _T("Entering... Seeking to %s (cwd = %s)\n"), parentName.AsString().c_str(), curParent.AsString().c_str() );
int ascendCount ;
switch( curParent.GetRelationship( parentName ) )
{
case cFCOName::REL_BELOW:
//
// we must ascend...
//
ascendCount = curParent.GetSize() - parentName.GetSize();
d.TraceDetail( _T("\tAscending %d times...\n"), ascendCount );
ASSERT( ascendCount > 0 );
for( ; ascendCount > 0; ascendCount-- )
Ascend();
break;
case cFCOName::REL_ABOVE:
//
// we are above the needed directory; nothing else to do here...
//
d.TraceDetail( _T("\tAbove; not ascending...\n") );
break;
case cFCOName::REL_EQUAL:
//
// we need to do nothing else here...
//
d.TraceDetail( _T("\tEqual; doing nothing...\n") );
SeekBegin();
return true;
case cFCOName::REL_UNRELATED:
//
// we have to go all the way to the root...
//
d.TraceDetail( _T("\tUnrelated; seeking to root...\n") );
SeekToRoot();
break;
default:
// unreachable
ASSERT( false );
return false;
}
curParent = GetParentName();
if( parentName.GetSize() == curParent.GetSize() )
return true;
//
// now we will descend to the parent directory we are interested in...
//
cFCOName::iterator i(parentName);
i.SeekTo( curParent.GetSize() );
for(; (! i.Done()); i.Next() )
{
if( ! mDbIter.SeekTo( i.GetName() ) )
{
// this needs to be created!
if( bCreate )
mDbIter.CreateEntry( i.GetName() );
else
return false;
}
//
// create the child array and descend
//
if( ! mDbIter.CanDescend() )
{
if( bCreate )
mDbIter.CreateChildArray();
else
return false;
}
mDbIter.Descend();
}
return true;
}
