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| <?php | |
| namespace CirrusSearch\Parser\AST; | |
| use CirrusSearch\Parser\AST\Visitor\Visitor; | |
| use Wikimedia\Assert\Assert; | |
| /** | |
| * Negated node | |
| * NOTE: may not appear in any resulting query AST, | |
| * NegatedNode are always removed and attached to a BooleanClause | |
| * as MUST_NOT. | |
| */ | |
| class NegatedNode extends ParsedNode { | |
| /** | |
| * @var ParsedNode | |
| */ | |
| private $child; | |
| /** | |
| * @var string type of negation used | |
| */ | |
| private $negationType; | |
| /** | |
| * @param int $startOffset | |
| * @param int $endOffset | |
| * @param ParsedNode $child | |
| * @param string $negationType | |
| */ | |
| public function __construct( $startOffset, $endOffset, ParsedNode $child, $negationType ) { | |
| Assert::parameter( self::validNegationType( $negationType ), 'negationType', 'Invalid negation type provided' ); | |
| parent::__construct( $startOffset, $endOffset ); | |
| $this->child = $child; | |
| $this->negationType = $negationType; | |
| } | |
| /** | |
| * @return array | |
| */ | |
| public function toArray() { | |
| return [ 'not' => array_merge( parent::baseParams(), [ | |
| 'negation_type' => $this->negationType, | |
| 'child' => $this->child->toArray(), | |
| ] ) ]; | |
| } | |
| /** | |
| * @return ParsedNode | |
| */ | |
| public function getChild() { | |
| return $this->child; | |
| } | |
| /** | |
| * Check whether this negation type is valid | |
| * @param string $negationType | |
| * @return bool | |
| */ | |
| public static function validNegationType( $negationType ) { | |
| return $negationType === '!' || $negationType === '-' || $negationType === 'NOT'; | |
| } | |
| /** | |
| * @return string type of negation used (NOT, ! or -) | |
| */ | |
| public function getNegationType() { | |
| return $this->negationType; | |
| } | |
| /** | |
| * @param Visitor $visitor | |
| */ | |
| public function accept( Visitor $visitor ) { | |
| $visitor->visitNegatedNode( $this ); | |
| } | |
| } |