*/
const INDEX_MAGIC = 'INDEXv0.1';
- /**
- * Separator for header data
- */
- const SEPARATOR_HEADER_DATA = 0x01;
-
- /**
- * Separator header->entries
- */
- const SEPARATOR_HEADER_ENTRIES = 0x02;
-
/**
* Protected constructor
*
// Calculate header size
$this->setHeaderSize(
strlen(self::INDEX_MAGIC) +
- strlen(self::SEPARATOR_HEADER_DATA) +
- self::LENGTH_COUNT +
- strlen(self::SEPARATOR_HEADER_ENTRIES)
+ strlen(chr(BaseFile::SEPARATOR_HEADER_DATA)) +
+ BaseFile::LENGTH_COUNT +
+ strlen(chr(BaseFile::SEPARATOR_HEADER_ENTRIES))
);
// Init counters and gaps array
*
* @return void
*/
- protected function readFileHeader () {
+ public function readFileHeader () {
//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
// First rewind to beginning as the header sits at the beginning ...
// Last character must be the separator
//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] data(-1)=%s', __METHOD__, __LINE__, dechex(ord(substr($data, -1, 1)))));
- assert(substr($data, -1, 1) == chr(self::SEPARATOR_HEADER_ENTRIES));
+ assert(substr($data, -1, 1) == chr(BaseFile::SEPARATOR_HEADER_ENTRIES));
//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
// Okay, then remove it
* 0 => magic
* 1 => total entries
*/
- $header = explode(chr(self::SEPARATOR_HEADER_DATA), $data);
+ $header = explode(chr(BaseFile::SEPARATOR_HEADER_DATA), $data);
// Set it here
$this->setHeader($header);
//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
// Check length of count
- assert(strlen($header[1]) == self::LENGTH_COUNT);
+ assert(strlen($header[1]) == BaseFile::LENGTH_COUNT);
//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
// Decode count
*
* @return void
*/
- protected function flushFileHeader () {
+ public function flushFileHeader () {
//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
// Put all informations together
self::INDEX_MAGIC,
// Separator header data
- chr(self::SEPARATOR_HEADER_DATA),
+ chr(BaseFile::SEPARATOR_HEADER_DATA),
// Total entries
- str_pad($this->dec2hex($this->getCounter()), self::LENGTH_COUNT, '0', STR_PAD_LEFT),
+ str_pad($this->dec2hex($this->getCounter()), BaseFile::LENGTH_COUNT, '0', STR_PAD_LEFT),
// Separator header<->entries
- chr(self::SEPARATOR_HEADER_ENTRIES)
+ chr(BaseFile::SEPARATOR_HEADER_ENTRIES)
);
// Write it to disk (header is always at seek position 0)
//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] EXIT!', __METHOD__, __LINE__));
}
- /**
- * Analyzes entries in index file. This will count all found (and valid)
- * entries, mark invalid as damaged and count gaps ("fragmentation"). If
- * only gaps are found, the file is considered as "virgin" (no entries).
- *
- * @return void
- */
- private function analyzeFile () {
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
-
- // Make sure the file is initialized
- assert($this->isFileInitialized());
-
- // Init counters and gaps array
- $this->initCountersGapsArray();
-
- // Output message (as this may take some time)
- self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Analyzing file structure ... (this may take some time)', __METHOD__, __LINE__));
-
- // First rewind to the begining
- $this->getIteratorInstance()->rewind();
-
- // Then try to load all entries
- while ($this->getIteratorInstance()->next()) {
- // Get current entry
- $current = $this->getIteratorInstance()->current();
-
- // Simply output it
- self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] current=%s', __METHOD__, __LINE__, print_r($current, TRUE)));
- } // END - while
-
- //* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] EXIT!', __METHOD__, __LINE__));
- }
-
- /**
- * Calculates minimum length for one entry
- *
- * @return $length Minimum length for one entry
- */
- protected function caluclateMinimumFileEntryLength () {
- // Calulcate it
- // @TODO Not finished yet
- $length = 0;
-
- // Return it
- return $length;
- }
-
/**
* Initializes this index
*
$fileName .= $this->getConfigInstance()->getConfigEntry('index_extension');
// Get a file i/o pointer instance for index file
- $fileInstance = ObjectFactory::createObjectByConfiguredName('index_file_class', array($fileName));
+ $fileInstance = ObjectFactory::createObjectByConfiguredName('index_file_class', array($fileName, $this));
// Get iterator instance
- $iteratorInstance = ObjectFactory::createObjectByConfiguredName('file_io_iterator_class', array($fileInstance));
+ $iteratorInstance = ObjectFactory::createObjectByConfiguredName('file_iterator_class', array($fileInstance));
// Is the instance implementing the right interface?
assert($iteratorInstance instanceof SeekableWritableFileIterator);
$this->setIteratorInstance($iteratorInstance);
// Is the file's header initialized?
- if (!$this->isFileHeaderInitialized()) {
+ if (!$this->getIteratorInstance()->isFileHeaderInitialized()) {
// No, then create it (which may pre-allocate the index)
- $this->createFileHeader();
+ $this->getIteratorInstance()->createFileHeader();
// And pre-allocate a bit
- $this->preAllocateFile('index');
+ $this->getIteratorInstance()->preAllocateFile('index');
} // END - if
// Load the file header
$this->readFileHeader();
// Count all entries in file
- $this->analyzeFile();
+ $this->getIteratorInstance()->analyzeFile();
+ }
+
+ /**
+ * Calculates minimum length for one entry/block
+ *
+ * @return $length Minimum length for one entry/block
+ */
+ public function calculateMinimumBlockLength () {
+ // Calulcate it
+ $length = BaseFile::LENGTH_TYPE + strlen(chr(BaseFile::SEPARATOR_TYPE_POSITION)) + BaseFile::LENGTH_POSITION + strlen(chr(BaseFile::SEPARATOR_ENTRIES));
+
+ // Return it
+ return $length;
+ }
+
+ /**
+ * Close a file source and set it's instance to null and the file name
+ * to empty.
+ *
+ * @return void
+ * @throws UnsupportedOperationException If this method is called
+ */
+ public function closeFile () {
+ throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
+ }
+
+ /**
+ * 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);
}
}
projects / core.git / blobdiff