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<?php |
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namespace Happyr\DoctrineSpecification\Operand; |
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use Happyr\DoctrineSpecification\Exception\NotConvertibleException; |
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/** |
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* This service is intended for backward compatibility and may be removed in the future. |
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*/ |
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class ArgumentToOperandConverter |
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{ |
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/** |
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* Convert the argument into the field operand if it is not an operand. |
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* |
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* @param Operand|string $argument |
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* |
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* @return Operand |
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*/ |
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public static function toField($argument) |
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{ |
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if ($argument instanceof Operand) { |
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return $argument; |
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} |
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return new Field($argument); |
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} |
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/** |
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* Convert the argument into the value operand if it is not an operand. |
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* |
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* @param Operand|string $argument |
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* |
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* @return Operand |
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*/ |
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public static function toValue($argument) |
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{ |
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if ($argument instanceof Operand) { |
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return $argument; |
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} |
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return new Value($argument); |
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} |
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/** |
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* Are all arguments is a operands? |
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* |
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* @param array $arguments |
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* |
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* @return bool |
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*/ |
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public static function isAllOperands(array $arguments) |
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{ |
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foreach ($arguments as $argument) { |
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if (!($argument instanceof Operand)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* Convert all possible arguments to operands. |
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* |
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* @param Operand[]|string[] $arguments |
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* |
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* @throws NotConvertibleException |
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* |
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* @return Operand[] |
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*/ |
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public static function convert(array $arguments) |
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{ |
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if (!$arguments) { |
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return []; |
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} |
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// always try convert the first argument to the field operand |
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$field = self::toField(array_shift($arguments)); |
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if (!$arguments) { |
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return [$field]; |
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} |
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// always try convert the last argument to the value operand |
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$value = self::toValue(array_pop($arguments)); |
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if (!$arguments) { |
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return [$field, $value]; |
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} |
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$result = [$field]; |
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foreach ($arguments as $argument) { |
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if (!($argument instanceof Operand)) { |
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throw new NotConvertibleException('You passed arguments not all of which are operands.'); |
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} |
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$result[] = $argument; |
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} |
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$result[] = $value; |
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return $result; |
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} |
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} |
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This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.