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<?php |
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namespace ByJG\AnyDataset\Dataset; |
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use ByJG\AnyDataset\Enum\FixedTextDefinition; |
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use ByJG\AnyDataset\Exception\IteratorException; |
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class FixedTextFileIterator extends GenericIterator |
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{ |
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/** |
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* |
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* @var FixedTextDefinition[] |
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*/ |
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protected $fields; |
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/** |
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* @var resource |
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*/ |
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protected $handle; |
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/** |
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* @var int |
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*/ |
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protected $current = 0; |
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/** |
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* |
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* @param resource $handle |
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* @param FixedTextDefinition[] $fields |
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*/ |
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public function __construct($handle, $fields) |
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{ |
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$this->fields = $fields; |
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$this->handle = $handle; |
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$this->current = 0; |
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} |
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/** |
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* @access public |
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* @return int |
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*/ |
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public function count() |
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{ |
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return -1; |
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} |
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/** |
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* @access public |
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* @return bool |
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*/ |
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public function hasNext() |
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{ |
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if (!$this->handle) { |
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return false; |
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} |
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if (feof($this->handle)) { |
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fclose($this->handle); |
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return false; |
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} |
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return true; |
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} |
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/** |
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* @return Row|null |
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* @throws \ByJG\AnyDataset\Exception\IteratorException |
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* @throws \ByJG\Serializer\Exception\InvalidArgumentException |
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*/ |
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public function moveNext() |
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{ |
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if ($this->hasNext()) { |
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$buffer = fgets($this->handle, 4096); |
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if ($buffer == "") { |
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return new Row(); |
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} |
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$fields = $this->processBuffer($buffer, $this->fields); |
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if (is_null($fields)) { |
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throw new IteratorException("Definition does not match"); |
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} |
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$this->current++; |
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return new Row($fields); |
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} |
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if ($this->handle) { |
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fclose($this->handle); |
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} |
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return null; |
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} |
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/** |
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* @param $buffer |
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* @param $fieldDefinition |
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* @return array |
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* @throws \ByJG\AnyDataset\Exception\IteratorException |
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*/ |
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protected function processBuffer($buffer, $fieldDefinition) |
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{ |
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$cntDef = count($fieldDefinition); |
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$fields = []; |
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for ($i = 0; $i < $cntDef; $i++) { |
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$fieldDef = $fieldDefinition[$i]; |
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$fields[$fieldDef->fieldName] = substr($buffer, $fieldDef->startPos, $fieldDef->length); |
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if (!empty($fieldDef->requiredValue) |
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&& ( |
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!preg_match("/^[" . $fieldDef->requiredValue . "]$/", $fields[$fieldDef->fieldName]) |
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) |
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) { |
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throw new IteratorException( |
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"Expected the value '" |
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. $fieldDef->requiredValue |
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. "' and I got '" |
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. $fields[$fieldDef->fieldName] |
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. "'" |
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); |
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} |
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if (is_array($fieldDef->subTypes)) { |
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$fields[$fieldDef->fieldName] = $this->processBuffer( |
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$fields[$fieldDef->fieldName], |
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$fieldDef->subTypes |
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); |
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} |
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} |
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return $fields; |
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} |
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public function key() |
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|
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{ |
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return $this->current; |
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} |
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141
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} |
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byjg /
anydataset
