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<?php |
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namespace Wikibase\JsonDumpReader\Reader; |
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use Wikibase\JsonDumpReader\DumpReader; |
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use Wikibase\JsonDumpReader\DumpReadingException; |
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/** |
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* Package private |
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* |
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* @licence GNU GPL v2+ |
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* @author Jeroen De Dauw < [email protected] > |
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*/ |
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class Bz2DumpReader implements DumpReader { |
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/** |
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* @var string |
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*/ |
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private $dumpFile; |
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/** |
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* @var resource|null |
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*/ |
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private $handle = null; |
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private $lines = [ '' ]; |
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/** |
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* @param string $dumpFilePath |
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*/ |
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public function __construct( $dumpFilePath ) { |
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$this->dumpFile = $dumpFilePath; |
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} |
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public function __destruct() { |
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$this->closeReader(); |
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} |
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private function closeReader() { |
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if ( is_resource( $this->handle ) ) { |
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bzclose( $this->handle ); |
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$this->handle = null; |
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} |
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} |
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public function rewind() { |
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$this->closeReader(); |
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$this->initReader(); |
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$this->lines = [ '' ]; |
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} |
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private function initReader() { |
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if ( $this->handle === null ) { |
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$this->handle = @bzopen( $this->dumpFile, 'r' ); |
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if ( $this->handle === false ) { |
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throw new DumpReadingException( 'Could not open file: ' . $this->dumpFile ); |
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} |
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} |
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} |
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/** |
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* @return string|null |
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* @throws DumpReadingException |
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*/ |
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public function nextJsonLine() { |
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$this->initReader(); |
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do { |
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$line = $this->nextLine(); |
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if ( $line === null ) { |
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return null; |
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} |
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} |
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while ( $line === '' || $line{0} !== '{' ); |
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return rtrim( $line, ",\n\r" ); |
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} |
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private function nextLine() { |
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while ( !feof( $this->handle ) && count( $this->lines ) === 1 ) { |
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$readString = bzread( $this->handle, 4096 ); |
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if ( bzerrno( $this->handle ) !== 0 ) { |
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throw new DumpReadingException( 'Decompression error: ' . bzerrstr( $this->handle ) ); |
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} |
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if ( $readString === false ) { |
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break; |
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} |
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$this->lines[0] .= $readString; |
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$this->lines = explode( "\n", $this->lines[0] ); |
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} |
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return array_shift( $this->lines ); |
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} |
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} |
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JeroenDeDauw /
JsonDumpReader
