+++ /dev/null
-<?php
-// Own namespace
-namespace CoreFramework\Index;
-
-// Import framework stuff
-use CoreFramework\Factory\ObjectFactory;
-use CoreFramework\Object\BaseFrameworkSystem;
-
-/**
- * A general index class
- *
- * @author Roland Haeder <webmaster@ship-simu.org>
- * @version 0.0.0
- * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2017 Core Developer Team
- * @license GNU GPL 3.0 or any newer version
- * @link http://www.ship-simu.org
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-class BaseIndex extends BaseFrameworkSystem {
- /**
- * Magic for this index
- */
- const INDEX_MAGIC = 'INDEXv0.1';
-
- /**
- * Separator group->hash
- */
- const SEPARATOR_GROUP_HASH = 0x01;
-
- /**
- * Separator hash->gap position
- */
- const SEPARATOR_HASH_GAP_POSITION = 0x02;
-
- /**
- * Separator gap position->length
- */
- const SEPARATOR_GAP_LENGTH = 0x03;
-
- /**
- * Protected constructor
- *
- * @param $className Name of the class
- * @return void
- */
- protected function __construct ($className) {
- // Call parent constructor
- parent::__construct($className);
- }
-
- /**
- * Reads the file header
- *
- * @return void
- */
- public function readFileHeader () {
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
-
- // First rewind to beginning as the header sits at the beginning ...
- $this->getIteratorInstance()->rewind();
-
- // Then read it (see constructor for calculation)
- $data = $this->getIteratorInstance()->read($this->getIteratorInstance()->getHeaderSize());
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] Read %d bytes (%d wanted).', __METHOD__, __LINE__, strlen($data), $this->getIteratorInstance()->getHeaderSize()));
-
- // Have all requested bytes been read?
- assert(strlen($data) == $this->getIteratorInstance()->getHeaderSize());
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
-
- // Last character must be the separator
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] data(-1)=%s', __METHOD__, __LINE__, dechex(ord(substr($data, -1, 1)))));
- assert(substr($data, -1, 1) == chr(BaseBinaryFile::SEPARATOR_HEADER_ENTRIES));
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
-
- // Okay, then remove it
- $data = substr($data, 0, -1);
-
- // And update seek position
- $this->getIteratorInstance()->updateSeekPosition();
-
- /*
- * Now split it:
- *
- * 0 => magic
- * 1 => total entries
- */
- $header = explode(chr(BaseBinaryFile::SEPARATOR_HEADER_DATA), $data);
-
- // Set it here
- $this->getIteratorInstance()->setHeader($header);
-
- // Check if the array has only 3 elements
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] header(%d)=%s', __METHOD__, __LINE__, count($header), print_r($header, TRUE)));
- assert(count($header) == 2);
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
-
- // Check magic
- assert($header[0] == self::INDEX_MAGIC);
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
-
- // Check length of count
- assert(strlen($header[1]) == BaseBinaryFile::LENGTH_COUNT);
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
-
- // Decode count
- $header[1] = hex2bin($header[1]);
-
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] EXIT!', __METHOD__, __LINE__));
- }
-
- /**
- * Flushes the file header
- *
- * @return void
- */
- public function flushFileHeader () {
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
-
- // Put all informations together
- $header = sprintf('%s%s%s%s',
- // Magic
- self::INDEX_MAGIC,
-
- // Separator header data
- chr(BaseBinaryFile::SEPARATOR_HEADER_DATA),
-
- // Total entries
- str_pad($this->dec2hex($this->getIteratorInstance()->getCounter()), BaseBinaryFile::LENGTH_COUNT, '0', STR_PAD_LEFT),
-
- // Separator header<->entries
- chr(BaseBinaryFile::SEPARATOR_HEADER_ENTRIES)
- );
-
- // Write it to disk (header is always at seek position 0)
- $this->getIteratorInstance()->writeData(0, $header, FALSE);
-
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] EXIT!', __METHOD__, __LINE__));
- }
-
- /**
- * Initializes this index
- *
- * @param $fileName File name of this index
- * @return void
- * @todo Currently the index file is not cached, please implement a memory-handling class and if enough RAM is found, cache the whole index file.
- */
- protected function initIndex ($fileName) {
- // Append index file extension
- $fileName .= $this->getConfigInstance()->getConfigEntry('index_extension');
-
- // Get a file i/o pointer instance for index file
- $fileInstance = ObjectFactory::createObjectByConfiguredName('index_file_class', array($fileName, $this));
-
- // Get iterator instance
- $iteratorInstance = ObjectFactory::createObjectByConfiguredName('file_iterator_class', array($fileInstance));
-
- // Is the instance implementing the right interface?
- assert($iteratorInstance instanceof SeekableWritableFileIterator);
-
- // Set iterator here
- $this->setIteratorInstance($iteratorInstance);
-
- // Calculate header size
- $this->getIteratorInstance()->setHeaderSize(
- strlen(self::INDEX_MAGIC) +
- strlen(chr(BaseBinaryFile::SEPARATOR_HEADER_DATA)) +
- BaseBinaryFile::LENGTH_COUNT +
- strlen(chr(BaseBinaryFile::SEPARATOR_HEADER_ENTRIES))
- );
-
- // Init counters and gaps array
- $this->getIteratorInstance()->initCountersGapsArray();
-
- // Is the file's header initialized?
- if (!$this->getIteratorInstance()->isFileHeaderInitialized()) {
- // No, then create it (which may pre-allocate the index)
- $this->getIteratorInstance()->createFileHeader();
-
- // And pre-allocate a bit
- $this->getIteratorInstance()->preAllocateFile('index');
- } // END - if
-
- // Load the file header
- $this->readFileHeader();
-
- // Count all entries in file
- $this->getIteratorInstance()->analyzeFile();
- }
-
- /**
- * Calculates minimum length for one entry/block
- *
- * @return $length Minimum length for one entry/block
- */
- public function calculateMinimumBlockLength () {
- // Calulcate it
- $length = BaseBinaryFile::LENGTH_TYPE + strlen(chr(BaseBinaryFile::SEPARATOR_TYPE_POSITION)) + BaseBinaryFile::LENGTH_POSITION + strlen(chr(BaseBinaryFile::SEPARATOR_ENTRIES));
-
- // Return it
- return $length;
- }
-
- /**
- * Determines whether the EOF has been reached
- *
- * @return $isEndOfFileReached Whether the EOF has been reached
- * @throws UnsupportedOperationException If this method is called
- */
- public function isEndOfFileReached () {
- throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Getter for file name
- *
- * @return $fileName The current file name
- * @throws UnsupportedOperationException If this method is called
- */
- public function getFileName () {
- throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Initializes counter for valid entries, arrays for damaged entries and
- * an array for gap seek positions. If you call this method on your own,
- * please re-analyze the file structure. So you are better to call
- * analyzeFile() instead of this method.
- *
- * @return void
- * @throws UnsupportedOperationException This method is not (and maybe never will be) supported
- */
- public function initCountersGapsArray () {
- throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Getter for header size
- *
- * @return $totalEntries Size of file header
- * @throws UnsupportedOperationException This method is not (and maybe never will be) supported
- */
- public final function getHeaderSize () {
- throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Setter for header size
- *
- * @param $headerSize Size of file header
- * @return void
- * @throws UnsupportedOperationException This method is not (and maybe never will be) supported
- */
- public final function setHeaderSize ($headerSize) {
- throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Getter for header array
- *
- * @return $totalEntries Size of file header
- * @throws UnsupportedOperationException This method is not (and maybe never will be) supported
- */
- public final function getHeader () {
- throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Setter for header
- *
- * @param $header Array for a file header
- * @return void
- * @throws UnsupportedOperationException This method is not (and maybe never will be) supported
- */
- public final function setHeader (array $header) {
- throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Updates seekPosition attribute from file to avoid to much access on file.
- *
- * @return void
- * @throws UnsupportedOperationException This method is not (and maybe never will be) supported
- */
- public function updateSeekPosition () {
- throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Getter for total entries
- *
- * @return $totalEntries Total entries in this file
- * @throws UnsupportedOperationException This method is not (and maybe never will be) supported
- */
- public final function getCounter () {
- throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * "Getter" for file size
- *
- * @return $fileSize Size of currently loaded file
- */
- public function getFileSize () {
- // Call iterator's method
- return $this->getIteratorInstance()->getFileSize();
- }
-
- /**
- * Writes data at given position
- *
- * @param $seekPosition Seek position
- * @param $data Data to be written
- * @param $flushHeader Whether to flush the header (default: flush)
- * @return void
- * @throws UnsupportedOperationException This method is not (and maybe never will be) supported
- */
- public function writeData ($seekPosition, $data, $flushHeader = TRUE) {
- /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('[%s:%d:] seekPosition=%s,data[]=%s,flushHeader=%d', __METHOD__, __LINE__, $seekPosition, gettype($data), intval($flushHeader)));
- throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Writes given value to the file and returns a hash and gap position for it
- *
- * @param $groupId Group identifier
- * @param $value Value to be added to the stack
- * @return $data Hash and gap position
- * @throws UnsupportedOperationException If this method is called
- */
- public function writeValueToFile ($groupId, $value) {
- self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . '] groupId=' . $groupId . ',value[' . gettype($value) . ']=' . print_r($value, TRUE));
- throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
- /**
- * Writes given raw data to the file and returns a gap position and length
- *
- * @param $groupId Group identifier
- * @param $hash Hash from encoded value
- * @param $encoded Encoded value to be written to the file
- * @return $data Gap position and length of the raw data
- */
- public function writeDataToFreeGap ($groupId, $hash, $encoded) {
- self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('[' . __METHOD__ . ':' . __LINE__ . '] groupId=' . $groupId . ',hash=' . $hash . ',encoded()=' . strlen($encoded));
- throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
- }
-
-}
projects / core.git / blobdiff