/**
* Generate compound index file
*/
private 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);
$cfsFile->writeBytes($dataFile->readBytes($this->_directory->fileLength($fileName)));
$this->_directory->deleteFile($fileName);
}
}
/**
* Opens the index for writing
*
* IndexWriter constructor needs Directory as a parameter. It should be
* a string with a path to the index folder or a Directory object.
* Second constructor parameter create is optional - true to create the
* index or overwrite the existing one.
*
* @param ZSearchDirectory $directory
* @param boolean $create
*/
public function __construct(ZSearchDirectory $directory, $create = false)
{
$this->_directory = $directory;
if ($create) {
foreach ($this->_directory->fileList() as $file) {
if ($file == 'deletable' || $file == 'segments' || substr($file, strlen($file) - 4) == '.cfs') {
$this->_directory->deleteFile($file);
}
}
$segmentsFile = $this->_directory->createFile('segments');
$segmentsFile->writeInt((int) 0xffffffff);
// write version
$segmentsFile->writeLong(0);
// write name counter
$segmentsFile->writeInt(0);
// write segment counter
$segmentsFile->writeInt(0);
$deletableFile = $this->_directory->createFile('deletable');
// write counter
$deletableFile->writeInt(0);
$this->_version = 0;
$this->_segmentNameCounter = 0;
$this->_segments = 0;
} else {
$segmentsFile = $this->_directory->getFileObject('segments');
$format = $segmentsFile->readInt();
if ($format != (int) 0xffffffff) {
throw new Zend_Search_Lucene_Exception('Wrong segments file format');
}
// read version
$this->_version = $segmentsFile->readLong();
// read counter
$this->_segmentNameCounter = $segmentsFile->readInt();
// read segment counter
$this->_segments = $segmentsFile->readInt();
}
$this->_newSegments = array();
$this->_currentSegment = null;
}
