bool DatabaseAdapter_ForwardIndex::exists( const DatabaseClientInterface* database_, const Index& typeno_)
{
DatabaseKey dbkey( DatabaseKey::ForwardIndexPrefix, typeno_);
Reference<DatabaseCursorInterface> cursor( database_->createCursor( DatabaseOptions().useCache()));
if (!cursor.get()) return false;
DatabaseCursorInterface::Slice key = cursor->seekFirst( dbkey.ptr(), dbkey.size());
return key.defined();
}
bool DatabaseAdapter_StringIndex::Cursor::getData( const DatabaseCursorInterface::Slice& dbkey, std::string& key, Index& value)
{
if (!dbkey.defined()) return false;
key = std::string( dbkey.ptr()+1, dbkey.size()-1);
DatabaseCursorInterface::Slice blkslice = m_cursor->value();
char const* vi = blkslice.ptr();
char const* ve = vi + blkslice.size();
value = unpackIndex( vi, ve);
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;
}
bool DatabaseAdapter_DataBlock::Cursor::getBlock( const DatabaseCursorInterface::Slice& key, DataBlock& blk)
{
if (!key.defined()) return false;
char const* ki = key.ptr()+m_domainKeySize;
char const* ke = ki + key.size()-m_domainKeySize;
Index elemno = unpackIndex( ki, ke);
DatabaseCursorInterface::Slice blkslice = m_cursor->value();
blk.init( elemno, blkslice.ptr(), blkslice.size());
return true;
}
bool DatabaseAdapter_DocFrequency::Cursor::getData( const DatabaseCursorInterface::Slice& key, Index& typeno, Index& termno, Index& df)
{
if (!key.defined()) return false;
char const* ki = key.ptr()+1;
char const* ke = ki + key.size()-1;
typeno = unpackIndex( ki, ke);
termno = unpackIndex( ki, ke);
DatabaseCursorInterface::Slice blkslice = m_cursor->value();
char const* vi = blkslice.ptr();
char const* ve = vi + blkslice.size();
df = unpackIndex( vi, ve);
return true;
}