bool DatabaseAdapter_DocMetaData::load( const Index& blockno, MetaDataBlock& blk)
{
std::string blkstr;
DatabaseKey dbkey( KeyPrefix, blockno);
if (!m_database->readValue( dbkey.ptr(), dbkey.size(), blkstr, DatabaseOptions())) return false;
blk.init( m_descr, blockno, blkstr.c_str(), blkstr.size());
return true;
}
bool DatabaseAdapter_DocMetaData::getBlock( const DatabaseCursorInterface::Slice& key, MetaDataBlock& blk)
{
if (!key.defined()) return false;
char const* ki = key.ptr()+1;
char const* ke = ki + key.size()-1;
Index blockno = unpackIndex( ki, ke);
DatabaseCursorInterface::Slice blkslice = m_cursor->value();
blk.init( m_descr, blockno, blkslice.ptr(), blkslice.size());
return true;
}
void MetaDataMap::getWriteBatch( DatabaseTransactionInterface* transaction, std::vector<Index>& cacheRefreshList)
{
Map::const_iterator mi = m_map.begin(), me = m_map.end();
Index blockno = 0;
MetaDataBlock blk;
DatabaseAdapter_DocMetaData dbadapter( m_database, m_descr);
for (; mi != me; ++mi)
{
Index docno = mi->first.first;
Index elemhandle = mi->first.second;
Index bn = MetaDataBlock::blockno( docno);
if (bn != blockno)
{
if (!blk.empty())
{
dbadapter.store( transaction, blk);
}
if (dbadapter.load( bn, blk))
{
cacheRefreshList.push_back( bn);
}
else
{
blk.init( m_descr, bn);
}
blockno = bn;
}
const MetaDataElement* elem = m_descr->get( elemhandle);
MetaDataRecord record = blk[ MetaDataBlock::index( docno)];
record.setValue( elem, mi->second);
}
if (!blk.empty())
{
dbadapter.store( transaction, blk);
}
}