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<?php |
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namespace frictionlessdata\datapackage\DataStreams; |
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use frictionlessdata\datapackage\Exceptions\DataStreamOpenException; |
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/** |
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* streams the raw data without processing - used for default data package resources. |
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*/ |
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class DefaultDataStream extends BaseDataStream |
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{ |
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public $fopenResource; |
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/** |
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* @param string $dataSource |
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* |
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* @throws DataStreamOpenException |
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*/ |
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public function __construct($dataSource, $dataSourceOptions = null) |
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{ |
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parent::__construct($dataSource, $dataSourceOptions); |
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try { |
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$this->fopenResource = fopen($this->dataSource, 'r'); |
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} catch (\Exception $e) { |
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throw new DataStreamOpenException('Failed to open data source '.json_encode($this->dataSource).': '.json_encode($e->getMessage())); |
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} |
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} |
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public function __destruct() |
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{ |
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fclose($this->fopenResource); |
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} |
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public function rewind() |
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{ |
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if ($this->currentLineNumber == 0) { |
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// starting iterations |
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$this->currentLineNumber = 1; |
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} else { |
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throw new \Exception('DataStream does not support rewinding a stream, sorry'); |
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} |
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} |
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public function save($filename) |
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{ |
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$target = fopen($filename, 'w'); |
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stream_copy_to_stream($this->fopenResource, $target); |
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fclose($target); |
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} |
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public function current() |
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{ |
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return fgets($this->fopenResource); |
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} |
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public function key() |
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{ |
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return $this->currentLineNumber; |
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} |
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public function next() |
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{ |
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++$this->currentLineNumber; |
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} |
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public function valid() |
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{ |
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return !feof($this->fopenResource); |
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} |
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protected $currentLineNumber = 0; |
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} |
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frictionlessdata /
datapackage-php
