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<?php |
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namespace Palmtree\Csv; |
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use Palmtree\Csv\Normalizer\NormalizerInterface; |
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use Palmtree\Csv\Normalizer\NullNormalizer; |
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use Palmtree\Csv\Row\Row; |
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use Palmtree\Csv\Util\StringUtil; |
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/** |
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* Reads a CSV file by loading each line into memory |
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* one at a time. |
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*/ |
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class Reader extends AbstractCsv implements \Iterator |
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{ |
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/** @var string */ |
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private $defaultNormalizer = NullNormalizer::class; |
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/** @var NormalizerInterface */ |
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private $headerNormalizer; |
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/** @var NormalizerInterface[] */ |
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private $normalizers = []; |
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/** @var Row */ |
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private $headers; |
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/** @var Row */ |
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private $row; |
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/** @var bool */ |
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private $bom = false; |
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/** @var int */ |
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private $offset = 0; |
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/** @var int */ |
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private $headerOffset = 0; |
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public function __construct($file, $hasHeaders = true, $delimiter = ',', $enclosure = '"', $escape = "\0") |
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{ |
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$this->headerNormalizer = new NullNormalizer(); |
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parent::__construct($file, $hasHeaders, $delimiter, $enclosure, $escape); |
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} |
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/** |
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* @return string |
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*/ |
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public function getOpenMode() |
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{ |
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return 'r'; |
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} |
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/** |
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* @param string $file |
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* |
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* @return Reader |
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*/ |
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public static function read($file) |
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{ |
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$csv = new static($file); |
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return $csv; |
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} |
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/** |
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* @return Row |
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*/ |
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public function getHeaders() |
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{ |
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if (null === $this->headers && $this->hasHeaders()) { |
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$this->rewind(); |
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} |
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return $this->headers; |
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} |
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/** |
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* @param $key |
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* |
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* @return mixed |
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*/ |
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public function getHeader($key) |
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{ |
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if (!isset($this->headers[$key])) { |
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return $key; |
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} |
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return $this->headers[$key]; |
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} |
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/** |
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* @param NormalizerInterface $headerNormalizer |
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* |
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* @return self |
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*/ |
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public function setHeaderNormalizer(NormalizerInterface $headerNormalizer) |
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{ |
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$this->headerNormalizer = $headerNormalizer; |
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return $this; |
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} |
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/** |
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* @param mixed $key |
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* @param NormalizerInterface $normalizer Normalizer instance. |
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* |
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* @return self |
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*/ |
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public function addNormalizer($key, NormalizerInterface $normalizer) |
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{ |
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$this->normalizers[$key] = $normalizer; |
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return $this; |
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} |
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/** |
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* @param array|\Traversable $normalizers |
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* |
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* @return self |
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*/ |
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public function addNormalizers($normalizers) |
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{ |
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foreach ($normalizers as $key => $normalizer) { |
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$this->addNormalizer($key, $normalizer); |
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} |
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return $this; |
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} |
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/** |
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* @param mixed $key |
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* |
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* @return NormalizerInterface |
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*/ |
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public function getNormalizer($key) |
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{ |
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if ($this->hasHeaders && \is_int($key)) { |
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$this->normalizers[$key] = $this->headerNormalizer; |
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} |
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if (!isset($this->normalizers[$key])) { |
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$class = $this->getDefaultNormalizer(); |
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$this->normalizers[$key] = new $class(); |
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} |
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return $this->normalizers[$key]; |
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} |
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/** |
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* Reads the next line in the CSV file |
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* and returns a Row object from it. |
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* |
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* @return Row|null |
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*/ |
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protected function getCurrentRow() |
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{ |
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$cells = $this->getDocument()->current(); |
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if (!\is_array($cells) || $cells == [null]) { |
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return null; |
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} |
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if ($this->key() === 0 && $this->hasBom()) { |
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$stripped = StringUtil::stripBom($cells[0], StringUtil::BOM_UTF8); |
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if ($stripped !== $cells[0]) { |
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$cells[0] = \trim($stripped, $this->getEnclosure()); |
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} |
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} |
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$row = new Row($cells, $this); |
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return $row; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function current() |
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{ |
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return $this->row; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function next() |
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{ |
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$this->getDocument()->next(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function key() |
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{ |
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return $this->getDocument()->key(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function valid() |
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{ |
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$this->row = $this->getCurrentRow(); |
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return $this->row instanceof Row; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function rewind() |
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{ |
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$this->getDocument()->rewind(); |
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$dataOffset = $this->offset + $this->headerOffset; |
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if ($this->hasHeaders()) { |
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if ($this->headerOffset) { |
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$this->getDocument()->seek($this->headerOffset); |
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} |
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// Set headers to null first so the header row is a zero-based array and can be used |
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// to set the array keys of all other rows. |
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$this->headers = null; |
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$this->headers = $this->getCurrentRow(); |
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++$dataOffset; |
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} |
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if ($dataOffset) { |
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$this->getDocument()->seek($dataOffset); |
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} |
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} |
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/** |
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* @param string $defaultNormalizer |
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* |
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* @return Reader |
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*/ |
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public function setDefaultNormalizer($defaultNormalizer) |
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{ |
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$this->defaultNormalizer = $defaultNormalizer; |
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return $this; |
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} |
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/** |
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* @return string |
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*/ |
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public function getDefaultNormalizer() |
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{ |
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return $this->defaultNormalizer; |
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} |
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/** |
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* @param bool $bom |
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* |
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* @return Reader |
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*/ |
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public function setBom($bom) |
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{ |
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$this->bom = $bom; |
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return $this; |
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} |
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/** |
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* @return bool |
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*/ |
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public function hasBom() |
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{ |
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return $this->bom; |
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} |
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/** |
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* @param int $offset |
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* |
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* @return self |
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*/ |
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public function setOffset($offset) |
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{ |
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$this->offset = $offset; |
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return $this; |
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} |
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/** |
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* @return int |
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*/ |
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public function getOffset() |
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{ |
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return $this->offset; |
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} |
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/** |
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* @param int $headerOffset |
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* |
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* @return self |
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*/ |
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public function setHeaderOffset($headerOffset) |
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{ |
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$this->headerOffset = $headerOffset; |
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return $this; |
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} |
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/** |
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* @return int |
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*/ |
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public function getHeaderOffset() |
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{ |
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return $this->headerOffset; |
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} |
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/** |
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* @return array |
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*/ |
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public function toArray() |
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{ |
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$result = []; |
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foreach ($this as $rowKey => $row) { |
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$result[$rowKey] = $row->toArray(); |
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} |
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return $result; |
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} |
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} |
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