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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Search_Lucene
* @subpackage Index
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: SegmentInfo.php 18951 2009-11-12 16:26:19Z alexander $
*/
/** Zend_Search_Lucene_Index_TermsStream_Interface */
require_once 'Zend/Search/Lucene/Index/TermsStream/Interface.php';
/** Zend_Search_Lucene_Search_Similarity */
require_once 'Zend/Search/Lucene/Search/Similarity.php';
/** Zend_Search_Lucene_Index_FieldInfo */
require_once 'Zend/Search/Lucene/Index/FieldInfo.php';
/** Zend_Search_Lucene_Index_Term */
require_once 'Zend/Search/Lucene/Index/Term.php';
/** Zend_Search_Lucene_Index_TermInfo */
require_once 'Zend/Search/Lucene/Index/TermInfo.php';
/**
* @category Zend
* @package Zend_Search_Lucene
* @subpackage Index
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Search_Lucene_Index_SegmentInfo implements Zend_Search_Lucene_Index_TermsStream_Interface
{
/**
* "Full scan vs fetch" boundary.
*
* If filter selectivity is less than this value, then full scan is performed
* (since term entries fetching has some additional overhead).
*/
const FULL_SCAN_VS_FETCH_BOUNDARY = 5;
/**
* Number of docs in a segment
*
* @var integer
*/
private $_docCount;
/**
* Segment name
*
* @var string
*/
private $_name;
/**
* Term Dictionary Index
*
* Array of arrays (Zend_Search_Lucene_Index_Term objects are represented as arrays because
* of performance considerations)
* [0] -> $termValue
* [1] -> $termFieldNum
*
* Corresponding Zend_Search_Lucene_Index_TermInfo object stored in the $_termDictionaryInfos
*
* @var array
*/
private $_termDictionary;
/**
* Term Dictionary Index TermInfos
*
* Array of arrays (Zend_Search_Lucene_Index_TermInfo objects are represented as arrays because
* of performance considerations)
* [0] -> $docFreq
* [1] -> $freqPointer
* [2] -> $proxPointer
* [3] -> $skipOffset
* [4] -> $indexPointer
*
* @var array
*/
private $_termDictionaryInfos;
/**
* Segment fields. Array of Zend_Search_Lucene_Index_FieldInfo objects for this segment
*
* @var array
*/
private $_fields;
/**
* Field positions in a dictionary.
* (Term dictionary contains filelds ordered by names)
*
* @var array
*/
private $_fieldsDicPositions;
/**
* Associative array where the key is the file name and the value is data offset
* in a compound segment file (.csf).
*
* @var array
*/
private $_segFiles;
/**
* Associative array where the key is the file name and the value is file size (.csf).
*
* @var array
*/
private $_segFileSizes;
/**
* Delete file generation number
*
* -2 means autodetect latest delete generation
* -1 means 'there is no delete file'
* 0 means pre-2.1 format delete file
* X specifies used delete file
*
* @var integer
*/
private $_delGen;
/**
* Segment has single norms file
*
* If true then one .nrm file is used for all fields
* Otherwise .fN files are used
*
* @var boolean
*/
private $_hasSingleNormFile;
/**
* Use compound segment file (*.cfs) to collect all other segment files
* (excluding .del files)
*
* @var boolean
*/
private $_isCompound;
/**
* File system adapter.
*
* @var Zend_Search_Lucene_Storage_Directory_Filesystem
*/
private $_directory;
/**
* Normalization factors.
* An array fieldName => normVector
* normVector is a binary string.
* Each byte corresponds to an indexed document in a segment and
* encodes normalization factor (float value, encoded by
* Zend_Search_Lucene_Search_Similarity::encodeNorm())
*
* @var array
*/
private $_norms = array();
/**
* List of deleted documents.
* bitset if bitset extension is loaded or array otherwise.
*
* @var mixed
*/
private $_deleted = null;
/**
* $this->_deleted update flag
*
* @var boolean
*/
private $_deletedDirty = false;
/**
* True if segment uses shared doc store
*
* @var boolean
*/
private $_usesSharedDocStore;
/*
* Shared doc store options.
* It's an assotiative array with the following items:
* - 'offset' => $docStoreOffset The starting document in the shared doc store files where this segment's documents begin
* - 'segment' => $docStoreSegment The name of the segment that has the shared doc store files.
* - 'isCompound' => $docStoreIsCompoundFile True, if compound file format is used for the shared doc store files (.cfx file).
*/
private $_sharedDocStoreOptions;
/**
* Zend_Search_Lucene_Index_SegmentInfo constructor
*
* @param Zend_Search_Lucene_Storage_Directory $directory
* @param string $name
* @param integer $docCount
* @param integer $delGen
* @param array|null $docStoreOptions
* @param boolean $hasSingleNormFile
* @param boolean $isCompound
*/
public function __construct(Zend_Search_Lucene_Storage_Directory $directory, $name, $docCount, $delGen = 0, $docStoreOptions = null, $hasSingleNormFile = false, $isCompound = null)
{
$this->_directory = $directory;
$this->_name = $name;
$this->_docCount = $docCount;
if ($docStoreOptions !== null) {
$this->_usesSharedDocStore = true;
$this->_sharedDocStoreOptions = $docStoreOptions;
if ($docStoreOptions['isCompound']) {
$cfxFile = $this->_directory->getFileObject($docStoreOptions['segment'] . '.cfx');
$cfxFilesCount = $cfxFile->readVInt();
$cfxFiles = array();
$cfxFileSizes = array();
for ($count = 0; $count < $cfxFilesCount; $count++) {
$dataOffset = $cfxFile->readLong();
if ($count != 0) {
$cfxFileSizes[$fileName] = $dataOffset - end($cfxFiles);
}
$fileName = $cfxFile->readString();
$cfxFiles[$fileName] = $dataOffset;
}
if ($count != 0) {
$cfxFileSizes[$fileName] = $this->_directory->fileLength($docStoreOptions['segment'] . '.cfx') - $dataOffset;
}
$this->_sharedDocStoreOptions['files'] = $cfxFiles;
$this->_sharedDocStoreOptions['fileSizes'] = $cfxFileSizes;
}
}
$this->_hasSingleNormFile = $hasSingleNormFile;
$this->_delGen = $delGen;
$this->_termDictionary = null;
if ($isCompound !== null) {
$this->_isCompound = $isCompound;
} else {
// It's a pre-2.1 segment or isCompound is set to 'unknown'
// Detect if segment uses compound file
require_once 'Zend/Search/Lucene/Exception.php';
try {
// Try to open compound file
$this->_directory->getFileObject($name . '.cfs');
// Compound file is found
$this->_isCompound = true;
} catch (Zend_Search_Lucene_Exception $e) {
if (strpos($e->getMessage(), 'is not readable') !== false) {
// Compound file is not found or is not readable
$this->_isCompound = false;
} else {
throw $e;
}
}
}
$this->_segFiles = array();
if ($this->_isCompound) {
$cfsFile = $this->_directory->getFileObject($name . '.cfs');
$segFilesCount = $cfsFile->readVInt();
for ($count = 0; $count < $segFilesCount; $count++) {
$dataOffset = $cfsFile->readLong();
if ($count != 0) {
$this->_segFileSizes[$fileName] = $dataOffset - end($this->_segFiles);
}
$fileName = $cfsFile->readString();
$this->_segFiles[$fileName] = $dataOffset;
}
if ($count != 0) {
$this->_segFileSizes[$fileName] = $this->_directory->fileLength($name . '.cfs') - $dataOffset;
}
}
$fnmFile = $this->openCompoundFile('.fnm');
$fieldsCount = $fnmFile->readVInt();
$fieldNames = array();
$fieldNums = array();
$this->_fields = array();
for ($count=0; $count < $fieldsCount; $count++) {
$fieldName = $fnmFile->readString();
$fieldBits = $fnmFile->readByte();
$this->_fields[$count] = new Zend_Search_Lucene_Index_FieldInfo($fieldName,
$fieldBits & 0x01 /* field is indexed */,
$count,
$fieldBits & 0x02 /* termvectors are stored */,
$fieldBits & 0x10 /* norms are omitted */,
$fieldBits & 0x20 /* payloads are stored */);
if ($fieldBits & 0x10) {
// norms are omitted for the indexed field
$this->_norms[$count] = str_repeat(chr(Zend_Search_Lucene_Search_Similarity::encodeNorm(1.0)), $docCount);
}
$fieldNums[$count] = $count;
$fieldNames[$count] = $fieldName;
}
array_multisort($fieldNames, SORT_ASC, SORT_REGULAR, $fieldNums);
$this->_fieldsDicPositions = array_flip($fieldNums);
if ($this->_delGen == -2) {
// SegmentInfo constructor is invoked from index writer
// Autodetect current delete file generation number
$this->_delGen = $this->_detectLatestDelGen();
}
// Load deletions
$this->_deleted = $this->_loadDelFile();
}
/**
* Load detetions file
*
* Returns bitset or an array depending on bitset extension availability
*
* @return mixed
* @throws Zend_Search_Lucene_Exception
*/
private function _loadDelFile()
{
if ($this->_delGen == -1) {
// There is no delete file for this segment
return null;
} else if ($this->_delGen == 0) {
// It's a segment with pre-2.1 format delete file
// Try to load deletions file
return $this->_loadPre21DelFile();
} else {
// It's 2.1+ format deleteions file
return $this->_load21DelFile();
}
}
/**
* Load pre-2.1 detetions file
*
* Returns bitset or an array depending on bitset extension availability
*
* @return mixed
* @throws Zend_Search_Lucene_Exception
*/
private function _loadPre21DelFile()
{
require_once 'Zend/Search/Lucene/Exception.php';
try {
// '.del' files always stored in a separate file
// Segment compound is not used
$delFile = $this->_directory->getFileObject($this->_name . '.del');
$byteCount = $delFile->readInt();
$byteCount = ceil($byteCount/8);
$bitCount = $delFile->readInt();
if ($bitCount == 0) {
$delBytes = '';
} else {
$delBytes = $delFile->readBytes($byteCount);
}
if (extension_loaded('bitset')) {
return $delBytes;
} else {
$deletions = array();
for ($count = 0; $count < $byteCount; $count++) {
$byte = ord($delBytes[$count]);
for ($bit = 0; $bit < 8; $bit++) {
if ($byte & (1<<$bit)) {
$deletions[$count*8 + $bit] = 1;
}
}
}
return $deletions;
}
} catch(Zend_Search_Lucene_Exception $e) {
if (strpos($e->getMessage(), 'is not readable') === false) {
throw $e;
}
// There is no deletion file
$this->_delGen = -1;
return null;
}
}
/**
* Load 2.1+ format detetions file
*
* Returns bitset or an array depending on bitset extension availability
*
* @return mixed
*/
private function _load21DelFile()
{
$delFile = $this->_directory->getFileObject($this->_name . '_' . base_convert($this->_delGen, 10, 36) . '.del');
$format = $delFile->readInt();
if ($format == (int)0xFFFFFFFF) {
if (extension_loaded('bitset')) {
$deletions = bitset_empty();
} else {
$deletions = array();
}
$byteCount = $delFile->readInt();
$bitCount = $delFile->readInt();
$delFileSize = $this->_directory->fileLength($this->_name . '_' . base_convert($this->_delGen, 10, 36) . '.del');
$byteNum = 0;
do {
$dgap = $delFile->readVInt();
$nonZeroByte = $delFile->readByte();
$byteNum += $dgap;
if (extension_loaded('bitset')) {
for ($bit = 0; $bit < 8; $bit++) {
if ($nonZeroByte & (1<<$bit)) {
bitset_incl($deletions, $byteNum*8 + $bit);
}
}
return $deletions;
} else {
for ($bit = 0; $bit < 8; $bit++) {
if ($nonZeroByte & (1<<$bit)) {
$deletions[$byteNum*8 + $bit] = 1;
}
}
return (count($deletions) > 0) ? $deletions : null;
}
} while ($delFile->tell() < $delFileSize);
} else {
// $format is actually byte count
$byteCount = ceil($format/8);
$bitCount = $delFile->readInt();
if ($bitCount == 0) {
$delBytes = '';
} else {
$delBytes = $delFile->readBytes($byteCount);
}
if (extension_loaded('bitset')) {
return $delBytes;
} else {
$deletions = array();
for ($count = 0; $count < $byteCount; $count++) {
$byte = ord($delBytes[$count]);
for ($bit = 0; $bit < 8; $bit++) {
if ($byte & (1<<$bit)) {
$deletions[$count*8 + $bit] = 1;
}
}
}
return (count($deletions) > 0) ? $deletions : null;
}
}
}
/**
* Opens index file stoted within compound index file
*
* @param string $extension
* @param boolean $shareHandler
* @throws Zend_Search_Lucene_Exception
* @return Zend_Search_Lucene_Storage_File
*/
public function openCompoundFile($extension, $shareHandler = true)
{
if (($extension == '.fdx' || $extension == '.fdt') && $this->_usesSharedDocStore) {
$fdxFName = $this->_sharedDocStoreOptions['segment'] . '.fdx';
$fdtFName = $this->_sharedDocStoreOptions['segment'] . '.fdt';
if (!$this->_sharedDocStoreOptions['isCompound']) {
$fdxFile = $this->_directory->getFileObject($fdxFName, $shareHandler);
$fdxFile->seek($this->_sharedDocStoreOptions['offset']*8, SEEK_CUR);
if ($extension == '.fdx') {
// '.fdx' file is requested
return $fdxFile;
} else {
// '.fdt' file is requested
$fdtStartOffset = $fdxFile->readLong();
$fdtFile = $this->_directory->getFileObject($fdtFName, $shareHandler);
$fdtFile->seek($fdtStartOffset, SEEK_CUR);
return $fdtFile;
}
}
if( !isset($this->_sharedDocStoreOptions['files'][$fdxFName]) ) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Shared doc storage segment compound file doesn\'t contain '
. $fdxFName . ' file.' );
}
if( !isset($this->_sharedDocStoreOptions['files'][$fdtFName]) ) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Shared doc storage segment compound file doesn\'t contain '
. $fdtFName . ' file.' );
}
// Open shared docstore segment file
$cfxFile = $this->_directory->getFileObject($this->_sharedDocStoreOptions['segment'] . '.cfx', $shareHandler);
// Seek to the start of '.fdx' file within compound file
$cfxFile->seek($this->_sharedDocStoreOptions['files'][$fdxFName]);
// Seek to the start of current segment documents section
$cfxFile->seek($this->_sharedDocStoreOptions['offset']*8, SEEK_CUR);
if ($extension == '.fdx') {
// '.fdx' file is requested
return $cfxFile;
} else {
// '.fdt' file is requested
$fdtStartOffset = $cfxFile->readLong();
// Seek to the start of '.fdt' file within compound file
$cfxFile->seek($this->_sharedDocStoreOptions['files'][$fdtFName]);
// Seek to the start of current segment documents section
$cfxFile->seek($fdtStartOffset, SEEK_CUR);
return $fdtFile;
}
}
$filename = $this->_name . $extension;
if (!$this->_isCompound) {
return $this->_directory->getFileObject($filename, $shareHandler);
}
if( !isset($this->_segFiles[$filename]) ) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Segment compound file doesn\'t contain '
. $filename . ' file.' );
}
$file = $this->_directory->getFileObject($this->_name . '.cfs', $shareHandler);
$file->seek($this->_segFiles[$filename]);
return $file;
}
/**
* Get compound file length
*
* @param string $extension
* @return integer
*/
public function compoundFileLength($extension)
{
if (($extension == '.fdx' || $extension == '.fdt') && $this->_usesSharedDocStore) {
$filename = $this->_sharedDocStoreOptions['segment'] . $extension;
if (!$this->_sharedDocStoreOptions['isCompound']) {
return $this->_directory->fileLength($filename);
}
if( !isset($this->_sharedDocStoreOptions['fileSizes'][$filename]) ) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Shared doc store compound file doesn\'t contain '
. $filename . ' file.' );
}
return $this->_sharedDocStoreOptions['fileSizes'][$filename];
}
$filename = $this->_name . $extension;
// Try to get common file first
if ($this->_directory->fileExists($filename)) {
return $this->_directory->fileLength($filename);
}
if( !isset($this->_segFileSizes[$filename]) ) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Index compound file doesn\'t contain '
. $filename . ' file.' );
}
return $this->_segFileSizes[$filename];
}
/**
* Returns field index or -1 if field is not found
*
* @param string $fieldName
* @return integer
*/
public function getFieldNum($fieldName)
{
foreach( $this->_fields as $field ) {
if( $field->name == $fieldName ) {
return $field->number;
}
}
return -1;
}
/**
* Returns field info for specified field
*
* @param integer $fieldNum
* @return Zend_Search_Lucene_Index_FieldInfo
*/
public function getField($fieldNum)
{
return $this->_fields[$fieldNum];
}
/**
* Returns array of fields.
* if $indexed parameter is true, then returns only indexed fields.
*
* @param boolean $indexed
* @return array
*/
public function getFields($indexed = false)
{
$result = array();
foreach( $this->_fields as $field ) {
if( (!$indexed) || $field->isIndexed ) {
$result[ $field->name ] = $field->name;
}
}
return $result;
}
/**
* Returns array of FieldInfo objects.
*
* @return array
*/
public function getFieldInfos()
{
return $this->_fields;
}
/**
* Returns actual deletions file generation number.
*
* @return integer
*/
public function getDelGen()
{
return $this->_delGen;
}
/**
* Returns the total number of documents in this segment (including deleted documents).
*
* @return integer
*/
public function count()
{
return $this->_docCount;
}
/**
* Returns number of deleted documents.
*
* @return integer
*/
private function _deletedCount()
{
if ($this->_deleted === null) {
return 0;
}
if (extension_loaded('bitset')) {
return count(bitset_to_array($this->_deleted));
} else {
return count($this->_deleted);
}
}
/**
* Returns the total number of non-deleted documents in this segment.
*
* @return integer
*/
public function numDocs()
{
if ($this->hasDeletions()) {
return $this->_docCount - $this->_deletedCount();
} else {
return $this->_docCount;
}
}
/**
* Get field position in a fields dictionary
*
* @param integer $fieldNum
* @return integer
*/
private function _getFieldPosition($fieldNum) {
// Treat values which are not in a translation table as a 'direct value'
return isset($this->_fieldsDicPositions[$fieldNum]) ?
$this->_fieldsDicPositions[$fieldNum] : $fieldNum;
}
/**
* Return segment name
*
* @return string
*/
public function getName()
{
return $this->_name;
}
/**
* TermInfo cache
*
* Size is 1024.
* Numbers are used instead of class constants because of performance considerations
*
* @var array
*/
private $_termInfoCache = array();
private function _cleanUpTermInfoCache()
{
// Clean 256 term infos
foreach ($this->_termInfoCache as $key => $termInfo) {
unset($this->_termInfoCache[$key]);
// leave 768 last used term infos
if (count($this->_termInfoCache) == 768) {
break;
}
}
}
/**
* Load terms dictionary index
*
* @throws Zend_Search_Lucene_Exception
*/
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'));
/** Zend_Search_Lucene_Index_DictionaryLoader */
require_once 'Zend/Search/Lucene/Index/DictionaryLoader.php';
// Load dictionary index data
list($this->_termDictionary, $this->_termDictionaryInfos) =
Zend_Search_Lucene_Index_DictionaryLoader::load($tiiFileData);
$stiFileData = serialize(array($this->_termDictionary, $this->_termDictionaryInfos));
$stiFile = $this->_directory->createFile($this->_name . '.sti');
$stiFile->writeBytes($stiFileData);
}
/**
* Scans terms dictionary and returns term info
*
* @param Zend_Search_Lucene_Index_Term $term
* @return Zend_Search_Lucene_Index_TermInfo
*/
public function getTermInfo(Zend_Search_Lucene_Index_Term $term)
{
$termKey = $term->key();
if (isset($this->_termInfoCache[$termKey])) {
$termInfo = $this->_termInfoCache[$termKey];
// Move termInfo to the end of cache
unset($this->_termInfoCache[$termKey]);
$this->_termInfoCache[$termKey] = $termInfo;
return $termInfo;
}
if ($this->_termDictionary === null) {
$this->_loadDictionaryIndex();
}
$searchField = $this->getFieldNum($term->field);
if ($searchField == -1) {
return null;
}
$searchDicField = $this->_getFieldPosition($searchField);
// search for appropriate value in dictionary
$lowIndex = 0;
$highIndex = count($this->_termDictionary)-1;
while ($highIndex >= $lowIndex) {
// $mid = ($highIndex - $lowIndex)/2;
$mid = ($highIndex + $lowIndex) >> 1;
$midTerm = $this->_termDictionary[$mid];
$fieldNum = $this->_getFieldPosition($midTerm[0] /* field */);
$delta = $searchDicField - $fieldNum;
if ($delta == 0) {
$delta = strcmp($term->text, $midTerm[1] /* text */);
}
if ($delta < 0) {
$highIndex = $mid-1;
} elseif ($delta > 0) {
$lowIndex = $mid+1;
} else {
// return $this->_termDictionaryInfos[$mid]; // We got it!
$a = $this->_termDictionaryInfos[$mid];
$termInfo = new Zend_Search_Lucene_Index_TermInfo($a[0], $a[1], $a[2], $a[3], $a[4]);
// Put loaded termInfo into cache
$this->_termInfoCache[$termKey] = $termInfo;
return $termInfo;
}
}
if ($highIndex == -1) {
// Term is out of the dictionary range
return null;
}
$prevPosition = $highIndex;
$prevTerm = $this->_termDictionary[$prevPosition];
$prevTermInfo = $this->_termDictionaryInfos[$prevPosition];
$tisFile = $this->openCompoundFile('.tis');
$tiVersion = $tisFile->readInt();
if ($tiVersion != (int)0xFFFFFFFE /* pre-2.1 format */ &&
$tiVersion != (int)0xFFFFFFFD /* 2.1+ format */) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Wrong TermInfoFile file format');
}
$termCount = $tisFile->readLong();
$indexInterval = $tisFile->readInt();
$skipInterval = $tisFile->readInt();
if ($tiVersion == (int)0xFFFFFFFD /* 2.1+ format */) {
$maxSkipLevels = $tisFile->readInt();
}
$tisFile->seek($prevTermInfo[4] /* indexPointer */ - (($tiVersion == (int)0xFFFFFFFD)? 24 : 20) /* header size*/, SEEK_CUR);
$termValue = $prevTerm[1] /* text */;
$termFieldNum = $prevTerm[0] /* field */;
$freqPointer = $prevTermInfo[1] /* freqPointer */;
$proxPointer = $prevTermInfo[2] /* proxPointer */;
for ($count = $prevPosition*$indexInterval + 1;
$count <= $termCount &&
( $this->_getFieldPosition($termFieldNum) < $searchDicField ||
($this->_getFieldPosition($termFieldNum) == $searchDicField &&
strcmp($termValue, $term->text) < 0) );
$count++) {
$termPrefixLength = $tisFile->readVInt();
$termSuffix = $tisFile->readString();
$termFieldNum = $tisFile->readVInt();
$termValue = Zend_Search_Lucene_Index_Term::getPrefix($termValue, $termPrefixLength) . $termSuffix;
$docFreq = $tisFile->readVInt();
$freqPointer += $tisFile->readVInt();
$proxPointer += $tisFile->readVInt();
if( $docFreq >= $skipInterval ) {
$skipOffset = $tisFile->readVInt();
} else {
$skipOffset = 0;
}
}
if ($termFieldNum == $searchField && $termValue == $term->text) {
$termInfo = new Zend_Search_Lucene_Index_TermInfo($docFreq, $freqPointer, $proxPointer, $skipOffset);
} else {
$termInfo = null;
}
// Put loaded termInfo into cache
$this->_termInfoCache[$termKey] = $termInfo;
if (count($this->_termInfoCache) == 1024) {
$this->_cleanUpTermInfoCache();
}
return $termInfo;
}
/**
* Returns IDs of all the documents containing term.
*
* @param Zend_Search_Lucene_Index_Term $term
* @param integer $shift
* @param Zend_Search_Lucene_Index_DocsFilter|null $docsFilter
* @return array
*/
public function termDocs(Zend_Search_Lucene_Index_Term $term, $shift = 0, $docsFilter = null)
{
$termInfo = $this->getTermInfo($term);
if (!$termInfo instanceof Zend_Search_Lucene_Index_TermInfo) {
if ($docsFilter !== null && $docsFilter instanceof Zend_Search_Lucene_Index_DocsFilter) {
$docsFilter->segmentFilters[$this->_name] = array();
}
return array();
}
$frqFile = $this->openCompoundFile('.frq');
$frqFile->seek($termInfo->freqPointer,SEEK_CUR);
$docId = 0;
$result = array();
if ($docsFilter !== null) {
if (!$docsFilter instanceof Zend_Search_Lucene_Index_DocsFilter) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Documents filter must be an instance of Zend_Search_Lucene_Index_DocsFilter or null.');
}
if (isset($docsFilter->segmentFilters[$this->_name])) {
// Filter already has some data for the current segment
// Make short name for the filter (which doesn't need additional dereferencing)
$filter = &$docsFilter->segmentFilters[$this->_name];
// Check if filter is not empty
if (count($filter) == 0) {
return array();
}
if ($this->_docCount/count($filter) < self::FULL_SCAN_VS_FETCH_BOUNDARY) {
// Perform fetching
// ---------------------------------------------------------------
$updatedFilterData = array();
for( $count=0; $count < $termInfo->docFreq; $count++ ) {
$docDelta = $frqFile->readVInt();
if( $docDelta % 2 == 1 ) {
$docId += ($docDelta-1)/2;
} else {
$docId += $docDelta/2;
// read freq
$frqFile->readVInt();
}
if (isset($filter[$docId])) {
$result[] = $shift + $docId;
$updatedFilterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
}
}
$docsFilter->segmentFilters[$this->_name] = $updatedFilterData;
// ---------------------------------------------------------------
} else {
// Perform full scan
$updatedFilterData = array();
for( $count=0; $count < $termInfo->docFreq; $count++ ) {
$docDelta = $frqFile->readVInt();
if( $docDelta % 2 == 1 ) {
$docId += ($docDelta-1)/2;
} else {
$docId += $docDelta/2;
// read freq
$frqFile->readVInt();
}
if (isset($filter[$docId])) {
$result[] = $shift + $docId;
$updatedFilterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
}
}
$docsFilter->segmentFilters[$this->_name] = $updatedFilterData;
}
} else {
// Filter is present, but doesn't has data for the current segment yet
$filterData = array();
for( $count=0; $count < $termInfo->docFreq; $count++ ) {
$docDelta = $frqFile->readVInt();
if( $docDelta % 2 == 1 ) {
$docId += ($docDelta-1)/2;
} else {
$docId += $docDelta/2;
// read freq
$frqFile->readVInt();
}
$result[] = $shift + $docId;
$filterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
}
$docsFilter->segmentFilters[$this->_name] = $filterData;
}
} else {
for( $count=0; $count < $termInfo->docFreq; $count++ ) {
$docDelta = $frqFile->readVInt();
if( $docDelta % 2 == 1 ) {
$docId += ($docDelta-1)/2;
} else {
$docId += $docDelta/2;
// read freq
$frqFile->readVInt();
}
$result[] = $shift + $docId;
}
}
return $result;
}
/**
* Returns term freqs array.
* Result array structure: array(docId => freq, ...)
*
* @param Zend_Search_Lucene_Index_Term $term
* @param integer $shift
* @param Zend_Search_Lucene_Index_DocsFilter|null $docsFilter
* @return Zend_Search_Lucene_Index_TermInfo
*/
public function termFreqs(Zend_Search_Lucene_Index_Term $term, $shift = 0, $docsFilter = null)
{
$termInfo = $this->getTermInfo($term);
if (!$termInfo instanceof Zend_Search_Lucene_Index_TermInfo) {
if ($docsFilter !== null && $docsFilter instanceof Zend_Search_Lucene_Index_DocsFilter) {
$docsFilter->segmentFilters[$this->_name] = array();
}
return array();
}
$frqFile = $this->openCompoundFile('.frq');
$frqFile->seek($termInfo->freqPointer,SEEK_CUR);
$result = array();
$docId = 0;
$result = array();
if ($docsFilter !== null) {
if (!$docsFilter instanceof Zend_Search_Lucene_Index_DocsFilter) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Documents filter must be an instance of Zend_Search_Lucene_Index_DocsFilter or null.');
}
if (isset($docsFilter->segmentFilters[$this->_name])) {
// Filter already has some data for the current segment
// Make short name for the filter (which doesn't need additional dereferencing)
$filter = &$docsFilter->segmentFilters[$this->_name];
// Check if filter is not empty
if (count($filter) == 0) {
return array();
}
if ($this->_docCount/count($filter) < self::FULL_SCAN_VS_FETCH_BOUNDARY) {
// Perform fetching
// ---------------------------------------------------------------
$updatedFilterData = array();
for ($count = 0; $count < $termInfo->docFreq; $count++) {
$docDelta = $frqFile->readVInt();
if ($docDelta % 2 == 1) {
$docId += ($docDelta-1)/2;
if (isset($filter[$docId])) {
$result[$shift + $docId] = 1;
$updatedFilterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
}
} else {
$docId += $docDelta/2;
if (isset($filter[$docId])) {
$result[$shift + $docId] = $frqFile->readVInt();
$updatedFilterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
}
}
}
$docsFilter->segmentFilters[$this->_name] = $updatedFilterData;
// ---------------------------------------------------------------
} else {
// Perform full scan
$updatedFilterData = array();
for ($count = 0; $count < $termInfo->docFreq; $count++) {
$docDelta = $frqFile->readVInt();
if ($docDelta % 2 == 1) {
$docId += ($docDelta-1)/2;
if (isset($filter[$docId])) {
$result[$shift + $docId] = 1;
$updatedFilterData[$docId] = 1; // 1 is just some constant value, so we don't need additional var dereference here
}
} else {
$docId += $docDelta/2;
if (isset($filter[$docId])) {
$result[$shift + $docId] = $frqFile->readVInt();
$updatedFilterData[$docId] = 1; // 1 is just some constant value, so we don't need additional var dereference here
}
}
}
$docsFilter->segmentFilters[$this->_name] = $updatedFilterData;
}
} else {
// Filter doesn't has data for current segment
$filterData = array();
for ($count = 0; $count < $termInfo->docFreq; $count++) {
$docDelta = $frqFile->readVInt();
if ($docDelta % 2 == 1) {
$docId += ($docDelta-1)/2;
$result[$shift + $docId] = 1;
$filterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
} else {
$docId += $docDelta/2;
$result[$shift + $docId] = $frqFile->readVInt();
$filterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
}
}
$docsFilter->segmentFilters[$this->_name] = $filterData;
}
} else {
for ($count = 0; $count < $termInfo->docFreq; $count++) {
$docDelta = $frqFile->readVInt();
if ($docDelta % 2 == 1) {
$docId += ($docDelta-1)/2;
$result[$shift + $docId] = 1;
} else {
$docId += $docDelta/2;
$result[$shift + $docId] = $frqFile->readVInt();
}
}
}
return $result;
}
/**
* Returns term positions array.
* Result array structure: array(docId => array(pos1, pos2, ...), ...)
*
* @param Zend_Search_Lucene_Index_Term $term
* @param integer $shift
* @param Zend_Search_Lucene_Index_DocsFilter|null $docsFilter
* @return Zend_Search_Lucene_Index_TermInfo
*/
public function termPositions(Zend_Search_Lucene_Index_Term $term, $shift = 0, $docsFilter = null)
{
$termInfo = $this->getTermInfo($term);
if (!$termInfo instanceof Zend_Search_Lucene_Index_TermInfo) {
if ($docsFilter !== null && $docsFilter instanceof Zend_Search_Lucene_Index_DocsFilter) {
$docsFilter->segmentFilters[$this->_name] = array();
}
return array();
}
$frqFile = $this->openCompoundFile('.frq');
$frqFile->seek($termInfo->freqPointer,SEEK_CUR);
$docId = 0;
$freqs = array();
if ($docsFilter !== null) {
if (!$docsFilter instanceof Zend_Search_Lucene_Index_DocsFilter) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Documents filter must be an instance of Zend_Search_Lucene_Index_DocsFilter or null.');
}
if (isset($docsFilter->segmentFilters[$this->_name])) {
// Filter already has some data for the current segment
// Make short name for the filter (which doesn't need additional dereferencing)
$filter = &$docsFilter->segmentFilters[$this->_name];
// Check if filter is not empty
if (count($filter) == 0) {
return array();
}
if ($this->_docCount/count($filter) < self::FULL_SCAN_VS_FETCH_BOUNDARY) {
// Perform fetching
// ---------------------------------------------------------------
for ($count = 0; $count < $termInfo->docFreq; $count++) {
$docDelta = $frqFile->readVInt();
if ($docDelta % 2 == 1) {
$docId += ($docDelta-1)/2;
$freqs[$docId] = 1;
} else {
$docId += $docDelta/2;
$freqs[$docId] = $frqFile->readVInt();
}
}
$updatedFilterData = array();
$result = array();
$prxFile = $this->openCompoundFile('.prx');
$prxFile->seek($termInfo->proxPointer, SEEK_CUR);
foreach ($freqs as $docId => $freq) {
$termPosition = 0;
$positions = array();
// we have to read .prx file to get right position for next doc
// even filter doesn't match current document
for ($count = 0; $count < $freq; $count++ ) {
$termPosition += $prxFile->readVInt();
$positions[] = $termPosition;
}
// Include into updated filter and into result only if doc is matched by filter
if (isset($filter[$docId])) {
$updatedFilterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
$result[$shift + $docId] = $positions;
}
}
$docsFilter->segmentFilters[$this->_name] = $updatedFilterData;
// ---------------------------------------------------------------
} else {
// Perform full scan
for ($count = 0; $count < $termInfo->docFreq; $count++) {
$docDelta = $frqFile->readVInt();
if ($docDelta % 2 == 1) {
$docId += ($docDelta-1)/2;
$freqs[$docId] = 1;
} else {
$docId += $docDelta/2;
$freqs[$docId] = $frqFile->readVInt();
}
}
$updatedFilterData = array();
$result = array();
$prxFile = $this->openCompoundFile('.prx');
$prxFile->seek($termInfo->proxPointer, SEEK_CUR);
foreach ($freqs as $docId => $freq) {
$termPosition = 0;
$positions = array();
// we have to read .prx file to get right position for next doc
// even filter doesn't match current document
for ($count = 0; $count < $freq; $count++ ) {
$termPosition += $prxFile->readVInt();
$positions[] = $termPosition;
}
// Include into updated filter and into result only if doc is matched by filter
if (isset($filter[$docId])) {
$updatedFilterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
$result[$shift + $docId] = $positions;
}
}
$docsFilter->segmentFilters[$this->_name] = $updatedFilterData;
}
} else {
// Filter doesn't has data for current segment
for ($count = 0; $count < $termInfo->docFreq; $count++) {
$docDelta = $frqFile->readVInt();
if ($docDelta % 2 == 1) {
$docId += ($docDelta-1)/2;
$freqs[$docId] = 1;
} else {
$docId += $docDelta/2;
$freqs[$docId] = $frqFile->readVInt();
}
}
$filterData = array();
$result = array();
$prxFile = $this->openCompoundFile('.prx');
$prxFile->seek($termInfo->proxPointer, SEEK_CUR);
foreach ($freqs as $docId => $freq) {
$filterData[$docId] = 1; // 1 is just a some constant value, so we don't need additional var dereference here
$termPosition = 0;
$positions = array();
for ($count = 0; $count < $freq; $count++ ) {
$termPosition += $prxFile->readVInt();
$positions[] = $termPosition;
}
$result[$shift + $docId] = $positions;
}
$docsFilter->segmentFilters[$this->_name] = $filterData;
}
} else {
for ($count = 0; $count < $termInfo->docFreq; $count++) {
$docDelta = $frqFile->readVInt();
if ($docDelta % 2 == 1) {
$docId += ($docDelta-1)/2;
$freqs[$docId] = 1;
} else {
$docId += $docDelta/2;
$freqs[$docId] = $frqFile->readVInt();
}
}
$result = array();
$prxFile = $this->openCompoundFile('.prx');
$prxFile->seek($termInfo->proxPointer, SEEK_CUR);
foreach ($freqs as $docId => $freq) {
$termPosition = 0;
$positions = array();
for ($count = 0; $count < $freq; $count++ ) {
$termPosition += $prxFile->readVInt();
$positions[] = $termPosition;
}
$result[$shift + $docId] = $positions;
}
}
return $result;
}
/**
* Load normalizatin factors from an index file
*
* @param integer $fieldNum
* @throws Zend_Search_Lucene_Exception
*/
private function _loadNorm($fieldNum)
{
if ($this->_hasSingleNormFile) {
$normfFile = $this->openCompoundFile('.nrm');
$header = $normfFile->readBytes(3);
$headerFormatVersion = $normfFile->readByte();
if ($header != 'NRM' || $headerFormatVersion != (int)0xFF) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Wrong norms file format.');
}
foreach ($this->_fields as $fNum => $fieldInfo) {
if ($fieldInfo->isIndexed) {
$this->_norms[$fNum] = $normfFile->readBytes($this->_docCount);
}
}
} else {
$fFile = $this->openCompoundFile('.f' . $fieldNum);
$this->_norms[$fieldNum] = $fFile->readBytes($this->_docCount);
}
}
/**
* Returns normalization factor for specified documents
*
* @param integer $id
* @param string $fieldName
* @return float
*/
public function norm($id, $fieldName)
{
$fieldNum = $this->getFieldNum($fieldName);
if ( !($this->_fields[$fieldNum]->isIndexed) ) {
return null;
}
if (!isset($this->_norms[$fieldNum])) {
$this->_loadNorm($fieldNum);
}
return Zend_Search_Lucene_Search_Similarity::decodeNorm( ord($this->_norms[$fieldNum][$id]) );
}
/**
* Returns norm vector, encoded in a byte string
*
* @param string $fieldName
* @return string
*/
public function normVector($fieldName)
{
$fieldNum = $this->getFieldNum($fieldName);
if ($fieldNum == -1 || !($this->_fields[$fieldNum]->isIndexed)) {
$similarity = Zend_Search_Lucene_Search_Similarity::getDefault();
return str_repeat(chr($similarity->encodeNorm( $similarity->lengthNorm($fieldName, 0) )),
$this->_docCount);
}
if (!isset($this->_norms[$fieldNum])) {
$this->_loadNorm($fieldNum);
}
return $this->_norms[$fieldNum];
}
/**
* Returns true if any documents have been deleted from this index segment.
*
* @return boolean
*/
public function hasDeletions()
{
return $this->_deleted !== null;
}
/**
* Returns true if segment has single norms file.
*
* @return boolean
*/
public function hasSingleNormFile()
{
return $this->_hasSingleNormFile ? true : false;
}
/**
* Returns true if segment is stored using compound segment file.
*
* @return boolean
*/
public function isCompound()
{
return $this->_isCompound;
}
/**
* Deletes a document from the index segment.
* $id is an internal document id
*
* @param integer
*/
public function delete($id)
{
$this->_deletedDirty = true;
if (extension_loaded('bitset')) {
if ($this->_deleted === null) {
$this->_deleted = bitset_empty($id);
}
bitset_incl($this->_deleted, $id);
} else {
if ($this->_deleted === null) {
$this->_deleted = array();
}
$this->_deleted[$id] = 1;
}
}
/**
* Checks, that document is deleted
*
* @param integer
* @return boolean
*/
public function isDeleted($id)
{
if ($this->_deleted === null) {
return false;
}
if (extension_loaded('bitset')) {
return bitset_in($this->_deleted, $id);
} else {
return isset($this->_deleted[$id]);
}
}
/**
* Detect latest delete generation
*
* Is actualy used from writeChanges() method or from the constructor if it's invoked from
* Index writer. In both cases index write lock is already obtained, so we shouldn't care
* about it
*
* @return integer
*/
private function _detectLatestDelGen()
{
$delFileList = array();
foreach ($this->_directory->fileList() as $file) {
if ($file == $this->_name . '.del') {
// Matches <segment_name>.del file name
$delFileList[] = 0;
} else if (preg_match('/^' . $this->_name . '_([a-zA-Z0-9]+)\.del$/i', $file, $matches)) {
// Matches <segment_name>_NNN.del file names
$delFileList[] = (int)base_convert($matches[1], 36, 10);
}
}
if (count($delFileList) == 0) {
// There is no deletions file for current segment in the directory
// Set deletions file generation number to 1
return -1;
} else {
// There are some deletions files for current segment in the directory
// Set deletions file generation number to the highest nuber
return max($delFileList);
}
}
/**
* Write changes if it's necessary.
*
* This method must be invoked only from the Writer _updateSegments() method,
* so index Write lock has to be already obtained.
*
* @internal
* @throws Zend_Search_Lucene_Exceptions
*/
public function writeChanges()
{
// Get new generation number
$latestDelGen = $this->_detectLatestDelGen();
if (!$this->_deletedDirty) {
// There was no deletions by current process
if ($latestDelGen == $this->_delGen) {
// Delete file hasn't been updated by any concurrent process
return;
} else if ($latestDelGen > $this->_delGen) {
// Delete file has been updated by some concurrent process
// Reload deletions file
$this->_delGen = $latestDelGen;
$this->_deleted = $this->_loadDelFile();
return;
} else {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Delete file processing workflow is corrupted for the segment \'' . $this->_name . '\'.');
}
}
if ($latestDelGen > $this->_delGen) {
// Merge current deletions with latest deletions file
$this->_delGen = $latestDelGen;
$latestDelete = $this->_loadDelFile();
if (extension_loaded('bitset')) {
$this->_deleted = bitset_union($this->_deleted, $latestDelete);
} else {
$this->_deleted += $latestDelete;
}
}
if (extension_loaded('bitset')) {
$delBytes = $this->_deleted;
$bitCount = count(bitset_to_array($delBytes));
} else {
$byteCount = floor($this->_docCount/8)+1;
$delBytes = str_repeat(chr(0), $byteCount);
for ($count = 0; $count < $byteCount; $count++) {
$byte = 0;
for ($bit = 0; $bit < 8; $bit++) {
if (isset($this->_deleted[$count*8 + $bit])) {
$byte |= (1<<$bit);
}
}
$delBytes[$count] = chr($byte);
}
$bitCount = count($this->_deleted);
}
if ($this->_delGen == -1) {
// Set delete file generation number to 1
$this->_delGen = 1;
} else {
// Increase delete file generation number by 1
$this->_delGen++;
}
$delFile = $this->_directory->createFile($this->_name . '_' . base_convert($this->_delGen, 10, 36) . '.del');
$delFile->writeInt($this->_docCount);
$delFile->writeInt($bitCount);
$delFile->writeBytes($delBytes);
$this->_deletedDirty = false;
}
/**
* Term Dictionary File object for stream like terms reading
*
* @var Zend_Search_Lucene_Storage_File
*/
private $_tisFile = null;
/**
* Actual offset of the .tis file data
*
* @var integer
*/
private $_tisFileOffset;
/**
* Frequencies File object for stream like terms reading
*
* @var Zend_Search_Lucene_Storage_File
*/
private $_frqFile = null;
/**
* Actual offset of the .frq file data
*
* @var integer
*/
private $_frqFileOffset;
/**
* Positions File object for stream like terms reading
*
* @var Zend_Search_Lucene_Storage_File
*/
private $_prxFile = null;
/**
* Actual offset of the .prx file in the compound file
*
* @var integer
*/
private $_prxFileOffset;
/**
* Actual number of terms in term stream
*
* @var integer
*/
private $_termCount = 0;
/**
* Overall number of terms in term stream
*
* @var integer
*/
private $_termNum = 0;
/**
* Segment index interval
*
* @var integer
*/
private $_indexInterval;
/**
* Segment skip interval
*
* @var integer
*/
private $_skipInterval;
/**
* Last TermInfo in a terms stream
*
* @var Zend_Search_Lucene_Index_TermInfo
*/
private $_lastTermInfo = null;
/**
* Last Term in a terms stream
*
* @var Zend_Search_Lucene_Index_Term
*/
private $_lastTerm = null;
/**
* Map of the document IDs
* Used to get new docID after removing deleted documents.
* It's not very effective from memory usage point of view,
* but much more faster, then other methods
*
* @var array|null
*/
private $_docMap = null;
/**
* An array of all term positions in the documents.
* Array structure: array( docId => array( pos1, pos2, ...), ...)
*
* Is set to null if term positions loading has to be skipped
*
* @var array|null
*/
private $_lastTermPositions;
/**
* Terms scan mode
*
* Values:
*
* self::SM_TERMS_ONLY - terms are scanned, no additional info is retrieved
* self::SM_FULL_INFO - terms are scanned, frequency and position info is retrieved
* self::SM_MERGE_INFO - terms are scanned, frequency and position info is retrieved
* document numbers are compacted (shifted if segment has deleted documents)
*
* @var integer
*/
private $_termsScanMode;
/** Scan modes */
const SM_TERMS_ONLY = 0; // terms are scanned, no additional info is retrieved
const SM_FULL_INFO = 1; // terms are scanned, frequency and position info is retrieved
const SM_MERGE_INFO = 2; // terms are scanned, frequency and position info is retrieved
// document numbers are compacted (shifted if segment contains deleted documents)
/**
* Reset terms stream
*
* $startId - id for the fist document
* $compact - remove deleted documents
*
* Returns start document id for the next segment
*
* @param integer $startId
* @param integer $mode
* @throws Zend_Search_Lucene_Exception
* @return integer
*/
public function resetTermsStream(/** $startId = 0, $mode = self::SM_TERMS_ONLY */)
{
/**
* SegmentInfo->resetTermsStream() method actually takes two optional parameters:
* $startId (default value is 0)
* $mode (default value is self::SM_TERMS_ONLY)
*/
$argList = func_get_args();
if (count($argList) > 2) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Wrong number of arguments');
} else if (count($argList) == 2) {
$startId = $argList[0];
$mode = $argList[1];
} else if (count($argList) == 1) {
$startId = $argList[0];
$mode = self::SM_TERMS_ONLY;
} else {
$startId = 0;
$mode = self::SM_TERMS_ONLY;
}
if ($this->_tisFile !== null) {
$this->_tisFile = null;
}
$this->_tisFile = $this->openCompoundFile('.tis', false);
$this->_tisFileOffset = $this->_tisFile->tell();
$tiVersion = $this->_tisFile->readInt();
if ($tiVersion != (int)0xFFFFFFFE /* pre-2.1 format */ &&
$tiVersion != (int)0xFFFFFFFD /* 2.1+ format */) {
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Wrong TermInfoFile file format');
}
$this->_termCount =
$this->_termNum = $this->_tisFile->readLong(); // Read terms count
$this->_indexInterval = $this->_tisFile->readInt(); // Read Index interval
$this->_skipInterval = $this->_tisFile->readInt(); // Read skip interval
if ($tiVersion == (int)0xFFFFFFFD /* 2.1+ format */) {
$maxSkipLevels = $this->_tisFile->readInt();
}
if ($this->_frqFile !== null) {
$this->_frqFile = null;
}
if ($this->_prxFile !== null) {
$this->_prxFile = null;
}
$this->_docMap = array();
$this->_lastTerm = new Zend_Search_Lucene_Index_Term('', -1);
$this->_lastTermInfo = new Zend_Search_Lucene_Index_TermInfo(0, 0, 0, 0);
$this->_lastTermPositions = null;
$this->_termsScanMode = $mode;
switch ($mode) {
case self::SM_TERMS_ONLY:
// Do nothing
break;
case self::SM_FULL_INFO:
// break intentionally omitted
case self::SM_MERGE_INFO:
$this->_frqFile = $this->openCompoundFile('.frq', false);
$this->_frqFileOffset = $this->_frqFile->tell();
$this->_prxFile = $this->openCompoundFile('.prx', false);
$this->_prxFileOffset = $this->_prxFile->tell();
for ($count = 0; $count < $this->_docCount; $count++) {
if (!$this->isDeleted($count)) {
$this->_docMap[$count] = $startId + (($mode == self::SM_MERGE_INFO) ? count($this->_docMap) : $count);
}
}
break;
default:
require_once 'Zend/Search/Lucene/Exception.php';
throw new Zend_Search_Lucene_Exception('Wrong terms scaning mode specified.');
break;
}
$this->nextTerm();
return $startId + (($mode == self::SM_MERGE_INFO) ? count($this->_docMap) : $this->_docCount);
}
/**
* Skip terms stream up to specified term preffix.
*
* Prefix contains fully specified field info and portion of searched term
*
* @param Zend_Search_Lucene_Index_Term $prefix
* @throws Zend_Search_Lucene_Exception
*/
public function skipTo(Zend_Search_Lucene_Index_Term $prefix)
{
if ($this->_termDictionary === null) {
$this->_loadDictionaryIndex();
}
$searchField = $this->getFieldNum($prefix->field);
if ($searchField == -1) {
/**
* Field is not presented in this segment
* Go to the end of dictionary
*/
$this->_tisFile = null;
$this->_frqFile = null;
$this->_prxFile = null;
$this->_lastTerm = null;
$this->_lastTermInfo = null;
$this->_lastTermPositions = null;
return;
}
$searchDicField = $this->_getFieldPosition($searchField);
// search for appropriate value in dictionary
$lowIndex = 0;
$highIndex = count($this->_termDictionary)-1;
while ($highIndex >= $lowIndex) {
// $mid = ($highIndex - $lowIndex)/2;
$mid = ($highIndex + $lowIndex) >> 1;
$midTerm = $this->_termDictionary[$mid];
$fieldNum = $this->_getFieldPosition($midTerm[0] /* field */);
$delta = $searchDicField - $fieldNum;
if ($delta == 0) {
$delta = strcmp($prefix->text, $midTerm[1] /* text */);
}
if ($delta < 0) {
$highIndex = $mid-1;
} elseif ($delta > 0) {
$lowIndex = $mid+1;
} else {
// We have reached term we are looking for
break;
}
}
if ($highIndex == -1) {
// Term is out of the dictionary range
$this->_tisFile = null;
$this->_frqFile = null;
$this->_prxFile = null;
$this->_lastTerm = null;
$this->_lastTermInfo = null;
$this->_lastTermPositions = null;
return;
}
$prevPosition = $highIndex;
$prevTerm = $this->_termDictionary[$prevPosition];
$prevTermInfo = $this->_termDictionaryInfos[$prevPosition];
if ($this->_tisFile === null) {
// The end of terms stream is reached and terms dictionary file is closed
// Perform mini-reset operation
$this->_tisFile = $this->openCompoundFile('.tis', false);
if ($this->_termsScanMode == self::SM_FULL_INFO || $this->_termsScanMode == self::SM_MERGE_INFO) {
$this->_frqFile = $this->openCompoundFile('.frq', false);
$this->_prxFile = $this->openCompoundFile('.prx', false);
}
}
$this->_tisFile->seek($this->_tisFileOffset + $prevTermInfo[4], SEEK_SET);
$this->_lastTerm = new Zend_Search_Lucene_Index_Term($prevTerm[1] /* text */,
($prevTerm[0] == -1) ? '' : $this->_fields[$prevTerm[0] /* field */]->name);
$this->_lastTermInfo = new Zend_Search_Lucene_Index_TermInfo($prevTermInfo[0] /* docFreq */,
$prevTermInfo[1] /* freqPointer */,
$prevTermInfo[2] /* proxPointer */,
$prevTermInfo[3] /* skipOffset */);
$this->_termCount = $this->_termNum - $prevPosition*$this->_indexInterval;
if ($highIndex == 0) {
// skip start entry
$this->nextTerm();
} else if ($prefix->field == $this->_lastTerm->field && $prefix->text == $this->_lastTerm->text) {
// We got exact match in the dictionary index
if ($this->_termsScanMode == self::SM_FULL_INFO || $this->_termsScanMode == self::SM_MERGE_INFO) {
$this->_lastTermPositions = array();
$this->_frqFile->seek($this->_lastTermInfo->freqPointer + $this->_frqFileOffset, SEEK_SET);
$freqs = array(); $docId = 0;
for( $count = 0; $count < $this->_lastTermInfo->docFreq; $count++ ) {
$docDelta = $this->_frqFile->readVInt();
if( $docDelta % 2 == 1 ) {
$docId += ($docDelta-1)/2;
$freqs[ $docId ] = 1;
} else {
$docId += $docDelta/2;
$freqs[ $docId ] = $this->_frqFile->readVInt();
}
}
$this->_prxFile->seek($this->_lastTermInfo->proxPointer + $this->_prxFileOffset, SEEK_SET);
foreach ($freqs as $docId => $freq) {
$termPosition = 0; $positions = array();
for ($count = 0; $count < $freq; $count++ ) {
$termPosition += $this->_prxFile->readVInt();
$positions[] = $termPosition;
}
if (isset($this->_docMap[$docId])) {
$this->_lastTermPositions[$this->_docMap[$docId]] = $positions;
}
}
}
return;
}
// Search term matching specified prefix
while ($this->_lastTerm !== null) {
if ( strcmp($this->_lastTerm->field, $prefix->field) > 0 ||
($prefix->field == $this->_lastTerm->field && strcmp($this->_lastTerm->text, $prefix->text) >= 0) ) {
// Current term matches or greate than the pattern
return;
}
$this->nextTerm();
}
}
/**
* Scans terms dictionary and returns next term
*
* @return Zend_Search_Lucene_Index_Term|null
*/
public function nextTerm()
{
if ($this->_tisFile === null || $this->_termCount == 0) {
$this->_lastTerm = null;
$this->_lastTermInfo = null;
$this->_lastTermPositions = null;
$this->_docMap = null;
// may be necessary for "empty" segment
$this->_tisFile = null;
$this->_frqFile = null;
$this->_prxFile = null;
return null;
}
$termPrefixLength = $this->_tisFile->readVInt();
$termSuffix = $this->_tisFile->readString();
$termFieldNum = $this->_tisFile->readVInt();
$termValue = Zend_Search_Lucene_Index_Term::getPrefix($this->_lastTerm->text, $termPrefixLength) . $termSuffix;
$this->_lastTerm = new Zend_Search_Lucene_Index_Term($termValue, $this->_fields[$termFieldNum]->name);
$docFreq = $this->_tisFile->readVInt();
$freqPointer = $this->_lastTermInfo->freqPointer + $this->_tisFile->readVInt();
$proxPointer = $this->_lastTermInfo->proxPointer + $this->_tisFile->readVInt();
if ($docFreq >= $this->_skipInterval) {
$skipOffset = $this->_tisFile->readVInt();
} else {
$skipOffset = 0;
}
$this->_lastTermInfo = new Zend_Search_Lucene_Index_TermInfo($docFreq, $freqPointer, $proxPointer, $skipOffset);
if ($this->_termsScanMode == self::SM_FULL_INFO || $this->_termsScanMode == self::SM_MERGE_INFO) {
$this->_lastTermPositions = array();
$this->_frqFile->seek($this->_lastTermInfo->freqPointer + $this->_frqFileOffset, SEEK_SET);
$freqs = array(); $docId = 0;
for( $count = 0; $count < $this->_lastTermInfo->docFreq; $count++ ) {
$docDelta = $this->_frqFile->readVInt();
if( $docDelta % 2 == 1 ) {
$docId += ($docDelta-1)/2;
$freqs[ $docId ] = 1;
} else {
$docId += $docDelta/2;
$freqs[ $docId ] = $this->_frqFile->readVInt();
}
}
$this->_prxFile->seek($this->_lastTermInfo->proxPointer + $this->_prxFileOffset, SEEK_SET);
foreach ($freqs as $docId => $freq) {
$termPosition = 0; $positions = array();
for ($count = 0; $count < $freq; $count++ ) {
$termPosition += $this->_prxFile->readVInt();
$positions[] = $termPosition;
}
if (isset($this->_docMap[$docId])) {
$this->_lastTermPositions[$this->_docMap[$docId]] = $positions;
}
}
}
$this->_termCount--;
if ($this->_termCount == 0) {
$this->_tisFile = null;
$this->_frqFile = null;
$this->_prxFile = null;
}
return $this->_lastTerm;
}
/**
* Close terms stream
*
* Should be used for resources clean up if stream is not read up to the end
*/
public function closeTermsStream()
{
$this->_tisFile = null;
$this->_frqFile = null;
$this->_prxFile = null;
$this->_lastTerm = null;
$this->_lastTermInfo = null;
$this->_lastTermPositions = null;
$this->_docMap = null;
}
/**
* Returns term in current position
*
* @return Zend_Search_Lucene_Index_Term|null
*/
public function currentTerm()
{
return $this->_lastTerm;
}
/**
* Returns an array of all term positions in the documents.
* Return array structure: array( docId => array( pos1, pos2, ...), ...)
*
* @return array
*/
public function currentTermPositions()
{
return $this->_lastTermPositions;
}
}
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