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<?php |
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namespace frictionlessdata\tableschema\Fields; |
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use frictionlessdata\tableschema\Exceptions\FieldValidationException; |
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use frictionlessdata\tableschema\SchemaValidationError; |
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use frictionlessdata\tableschema\Utils; |
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class FieldsFactory |
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{ |
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/** |
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* list of all the available field classes. |
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* |
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* this list is used when inferring field type from a value |
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* infer works by trying to case the value to the field, in the fieldClasses order |
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* first field that doesn't raise exception on infer wins |
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*/ |
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public static $fieldClasses = [ |
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'\\frictionlessdata\\tableschema\\Fields\\IntegerField', |
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'\\frictionlessdata\\tableschema\\Fields\\NumberField', |
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'\\frictionlessdata\\tableschema\\Fields\\StringField', |
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// these fields will not be inferred - StringField will catch all values before it reaches these |
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'\\frictionlessdata\\tableschema\\Fields\\YearMonthField', |
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'\\frictionlessdata\\tableschema\\Fields\\YearField', |
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'\\frictionlessdata\\tableschema\\Fields\\TimeField', |
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'\\frictionlessdata\\tableschema\\Fields\\ObjectField', |
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'\\frictionlessdata\\tableschema\\Fields\\GeopointField', |
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'\\frictionlessdata\\tableschema\\Fields\\GeojsonField', |
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'\\frictionlessdata\\tableschema\\Fields\\DurationField', |
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'\\frictionlessdata\\tableschema\\Fields\\DatetimeField', |
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'\\frictionlessdata\\tableschema\\Fields\\DateField', |
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'\\frictionlessdata\\tableschema\\Fields\\BooleanField', |
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'\\frictionlessdata\\tableschema\\Fields\\ArrayField', |
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'\\frictionlessdata\\tableschema\\Fields\\AnyField', |
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]; |
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/** |
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* get a new field object in the correct type according to the descriptor. |
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* |
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* @param object|array $descriptor |
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* |
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* @return BaseField |
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* |
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* @throws \Exception |
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*/ |
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public static function field($descriptor, $name = null) |
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{ |
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if (is_a($descriptor, 'frictionlessdata\\tableschema\\Fields\\BaseField')) { |
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return $descriptor; |
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} else { |
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if (Utils::isJsonString($descriptor)) { |
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$descriptor = json_decode($descriptor); |
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} elseif (is_array($descriptor)) { |
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$descriptor = json_decode(json_encode($descriptor)); |
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} |
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if (!isset($descriptor->name) && !is_null($name)) { |
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$descriptor->name = $name; |
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} |
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foreach (static::$fieldClasses as $fieldClass) { |
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/** @var BaseField $fieldClass */ |
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if ($field = $fieldClass::inferDescriptor($descriptor)) { |
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return $field; |
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} |
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} |
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throw new FieldValidationException([ |
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new SchemaValidationError( |
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SchemaValidationError::SCHEMA_VIOLATION, |
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'Could not find a valid field for descriptor: '.json_encode($descriptor)), |
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]); |
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} |
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} |
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/** |
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* @param $val |
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* @param null $descriptor |
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* |
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* @return mixed |
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* |
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* @throws FieldValidationException |
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*/ |
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public static function infer($val, $descriptor = null, $lenient = false) |
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{ |
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foreach (static::$fieldClasses as $fieldClass) { |
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/** @var BaseField $fieldClass */ |
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if ($field = $fieldClass::infer($val, $descriptor, $lenient)) { |
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return $field; |
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} |
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} |
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throw new FieldValidationException([ |
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new SchemaValidationError( |
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SchemaValidationError::SCHEMA_VIOLATION, |
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'Could not find a valid field for value: '.json_encode($val)), |
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]); |
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} |
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} |
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OriHoch /
tableschema-php
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