framework/main/classes/index/file/stack/class_FileStackIndex.php

   1 <?php
   2 // Own namespace
   3 namespace Org\Mxchange\CoreFramework\Index\File\Stack;
   4
   5 // Import framework stuff
   6 use Org\Mxchange\CoreFramework\Generic\FrameworkInterface;
   7 use Org\Mxchange\CoreFramework\Index\File\BaseFileIndex;
   8 use Org\Mxchange\CoreFramework\Index\File\Stack\IndexableStack;
   9 use Org\Mxchange\CoreFramework\Index\Indexable;
  10 use Org\Mxchange\CoreFramework\Registry\Registerable;
  11 use Org\Mxchange\CoreFramework\Stack\File\StackableFile;
  12
  13 // Import SPL stuff
  14 use \InvalidArgumentException;
  15 use \SplFileInfo;
  16 use \UnexpectedValueException;
  17
  18 /**
  19  * A FileStack index class
  20  *
  21  * @author              Roland Haeder <webmaster@ship-simu.org>
  22  * @version             0.0.0
  23  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2022 Core Developer Team
  24  * @license             GNU GPL 3.0 or any newer version
  25  * @link                http://www.ship-simu.org
  26  *
  27  * This program is free software: you can redistribute it and/or modify
  28  * it under the terms of the GNU General Public License as published by
  29  * the Free Software Foundation, either version 3 of the License, or
  30  * (at your option) any later version.
  31  *
  32  * This program is distributed in the hope that it will be useful,
  33  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  34  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  35  * GNU General Public License for more details.
  36  *
  37  * You should have received a copy of the GNU General Public License
  38  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  39  */
  40 class FileStackIndex extends BaseFileIndex implements IndexableStack, Registerable {
  41         /**
  42          * Protected constructor
  43          *
  44          * @return      void
  45          */
  46         private function __construct () {
  47                 // Call parent constructor
  48                 parent::__construct(__CLASS__);
  49         }
  50
  51         /**
  52          * Creates an instance of this Index class and prepares it for usage
  53          *
  54          * @param       $fileInfoInstance       An instance of a SplFileInfo class
  55          * @return      $indexInstance  An instance of this Index class
  56          */
  57         public final static function createFileStackIndex (SplFileInfo $fileInfoInstance) {
  58                 // Get a new instance
  59                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: fileInfoInstance[%s]=%s - CALLED!', get_class($fileInfoInstance), $fileInfoInstance));
  60                 $indexInstance = new FileStackIndex();
  61
  62                 // Initialize index
  63                 $indexInstance->initFileIndex($fileInfoInstance);
  64
  65                 // Return the prepared instance
  66                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: indexInstance=%s - EXIT!', $indexInstance->__toString()));
  67                 return $indexInstance;
  68         }
  69
  70         /**
  71          * Adds given data's hash to an index file
  72          *
  73          * @param       $stackName      Name of stack to add hash for
  74          * @param       $data           Hash and gap position to be added to the index
  75          * @return      void
  76          * @throws      InvalidArgumentException        If a parameter is not valid
  77          * @throws      UnexpectedValueException        If an invalid gap position is being returned
  78          */
  79         public function addHashedDataToIndex (string $stackName, array $data) {
  80                 // Validate parameter
  81                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: stackName=%s,data()=%d - CALLED!', $stackName, count($data)));
  82                 if (empty($stackName)) {
  83                         // Throw IAE
  84                         throw new InvalidArgumentException('Parameter "stackName" is empty', FrameworkInterface::EXCEPTION_INVALID_ARGUMENT);
  85                 } elseif (count($data) == 0) {
  86                         // Throw it again
  87                         throw new InvalidArgumentException('Parameter "data" is an empty array');
  88                 } elseif (!isset($data[StackableFile::ARRAY_NAME_HASH])) {
  89                         // Important array element missing
  90                         throw new InvalidArgumentException(sprintf('data[%s] not found', StackableFile::ARRAY_NAME_HASH));
  91                 } elseif (!isset($data[StackableFile::ARRAY_NAME_GAP_POSITION])) {
  92                         // Important array element missing
  93                         throw new InvalidArgumentException(sprintf('data[%s] not found', StackableFile::ARRAY_NAME_GAP_POSITION));
  94                 } elseif (!isset($data[StackableFile::ARRAY_NAME_DATA_LENGTH])) {
  95                         // Important array element missing
  96                         throw new InvalidArgumentException(sprintf('data[%s] not found', StackableFile::ARRAY_NAME_DATA_LENGTH));
  97                 }
  98
  99                 // Raw data been written to the file
 100                 $rawData = sprintf('%s%s%s%s%s%s%s',
 101                         $stackName,
 102                         Indexable::SEPARATOR_GROUP_HASH,
 103                         $data[StackableFile::ARRAY_NAME_HASH],
 104                         Indexable::SEPARATOR_HASH_GAP_POSITION,
 105                         $data[StackableFile::ARRAY_NAME_GAP_POSITION],
 106                         Indexable::SEPARATOR_GAP_LENGTH,
 107                         $data[StackableFile::ARRAY_NAME_DATA_LENGTH]
 108                 );
 109                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: stackName=%s,hash{}=0x%s,rawData(%d)=%s', $stackName, bin2hex($data[StackableFile::ARRAY_NAME_HASH]), strlen($rawData), $rawData));
 110
 111                 // Search for next free gap
 112                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: Calling this->iteratorInstance->binaryFileInstance->searchNextGap(%d) ...', strlen($rawData)));
 113                 $gapPosition = $this->getIteratorInstance()->getBinaryFileInstance()->searchNextGap(strlen($rawData));
 114
 115                 // Gap position cannot be smaller or equal than header length
 116                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: stackName=%s,hash{}=0x%s,gapPosition=%s', $stackName, bin2hex($data[StackableFile::ARRAY_NAME_HASH]), $gapPosition));
 117                 if ($gapPosition <= ($this->getIteratorInstance()->getBinaryFileInstance()->getHeaderSize() + 1)) {
 118                         // Not valid gap position returned
 119                         throw new UnexpectedValueException(sprintf('gapPosition[%s]=%d is smaller or equal headerSize+1=%d', gettype($gapPosition), $gapPosition, ($this->getIteratorInstance()->getBinaryFileInstance()->getHeaderSize() + 1)));
 120                 }
 121
 122                 // Then write the data at that gap
 123                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: Calling this->iteratorInstance->binaryFileInstance->writeData(%d,%s) ...', $gapPosition, $rawData));
 124                 $this->getIteratorInstance()->getBinaryFileInstance()->writeData($gapPosition, $rawData);
 125
 126                 // Trace message
 127                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('FILE-STACK-INDEX: stackName=%s,hash{}=0x%s,rawData()=%d - EXIT!', $stackName, bin2hex($data[StackableFile::ARRAY_NAME_HASH]), strlen($rawData)));
 128         }
 129
 130 }