/**
* Generate compound index file
*/
protected function _generateCFS()
{
$cfsFile = $this->_directory->createFile($this->_name . '.cfs');
$cfsFile->writeVInt(count($this->_files));
$dataOffsetPointers = array();
foreach ($this->_files as $fileName) {
$dataOffsetPointers[$fileName] = $cfsFile->tell();
$cfsFile->writeLong(0);
// write dummy data
$cfsFile->writeString($fileName);
}
foreach ($this->_files as $fileName) {
// Get actual data offset
$dataOffset = $cfsFile->tell();
// Seek to the data offset pointer
$cfsFile->seek($dataOffsetPointers[$fileName]);
// Write actual data offset value
$cfsFile->writeLong($dataOffset);
// Seek back to the end of file
$cfsFile->seek($dataOffset);
$dataFile = $this->_directory->getFileObject($fileName);
$byteCount = $this->_directory->fileLength($fileName);
while ($byteCount > 0) {
$data = $dataFile->readBytes(min($byteCount, 131072));
$byteCount -= strlen($data);
$cfsFile->writeBytes($data);
}
$this->_directory->deleteFile($fileName);
}
}
/**
* Load terms dictionary index
*
* @throws \ZendSearch\Lucene\Exception\ExceptionInterface
*/
private function _loadDictionaryIndex()
{
// Check, if index is already serialized
if ($this->_directory->fileExists($this->_name . '.sti')) {
// Load serialized dictionary index data
$stiFile = $this->_directory->getFileObject($this->_name . '.sti');
$stiFileData = $stiFile->readBytes($this->_directory->fileLength($this->_name . '.sti'));
// Load dictionary index data
if (($unserializedData = @unserialize($stiFileData)) !== false) {
list($this->_termDictionary, $this->_termDictionaryInfos) = $unserializedData;
return;
}
}
// Load data from .tii file and generate .sti file
// Prefetch dictionary index data
$tiiFile = $this->openCompoundFile('.tii');
$tiiFileData = $tiiFile->readBytes($this->compoundFileLength('.tii'));
// Load dictionary index data
list($this->_termDictionary, $this->_termDictionaryInfos) = DictionaryLoader::load($tiiFileData);
$stiFileData = serialize(array($this->_termDictionary, $this->_termDictionaryInfos));
$stiFile = $this->_directory->createFile($this->_name . '.sti');
$stiFile->writeBytes($stiFileData);
}
