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<?php |
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namespace frictionlessdata\tableschema; |
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/** |
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* Table Schema which updates the descriptor based on input data. |
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*/ |
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class InferSchema extends Schema |
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{ |
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/** |
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* InferSchema constructor. |
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* |
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* @param null $descriptor optional descriptor object - will be used as an initial descriptor |
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* @param bool $lenient if true - infer just basic types, without strict format requirements |
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*/ |
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public function __construct($descriptor = null, $lenient = false) |
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{ |
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$this->descriptor = empty($descriptor) ? (object) ['fields' => []] : $descriptor; |
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$this->fieldsInferer = new Fields\FieldsInferrer(null, $lenient); |
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} |
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/** |
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* @return object |
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*/ |
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public function descriptor() |
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{ |
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return $this->descriptor; |
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} |
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/** |
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* @param mixed[] $row |
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* |
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* @return mixed[] |
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* |
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* @throws Exceptions\FieldValidationException |
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*/ |
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public function castRow($row) |
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{ |
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if ($this->isLocked) { |
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// schema is locked, no more inferring is needed |
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return parent::castRow($row); |
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} else { |
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// add the row to the inferrer, update the descriptor according to the best inferred fields |
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$this->fieldsInferer->addRows([$row]); |
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$this->descriptor->fields = []; |
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foreach ($this->fieldsInferer->infer() as $fieldName => $inferredField) { |
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/* @var Fields\BaseField $inferredField */ |
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$this->descriptor->fields[] = $inferredField->descriptor(); |
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} |
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$this->castRows = $this->fieldsInferer->castRows(); |
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return $this->castRows[count($this->castRows) - 1]; |
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} |
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} |
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public function lock() |
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{ |
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$this->isLocked = true; |
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return $this->castRows; |
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} |
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protected $isLocked = false; |
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protected $fieldsInferer; |
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protected $castRows; |
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} |
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OriHoch /
tableschema-php
