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<?php |
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declare(strict_types=1); |
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namespace Stratadox\Json; |
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/** |
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* Parser for json strings; Factory for Json objects. |
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* |
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* @author Stratadox |
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*/ |
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final class JsonParser implements Parser |
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{ |
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private const IMMUTABLE = false; |
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private const MUTABLE = true; |
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/** @var Parser[] Cache for the parsers */ |
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private static $thatIs = []; |
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/** @var bool Whether the resulting Json object should be mutable */ |
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private $makesMutableJson; |
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private function __construct(bool $mutable) |
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{ |
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$this->makesMutableJson = $mutable; |
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} |
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/** |
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* Produces a json parser to serve as factory for Json objects. |
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* |
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* By default, the parser will produce immutable json objects. |
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* This method will not always produce a new parser per se, since there are |
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* only two possible states (mutable of immutable) for the factory, it makes |
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* little sense to create more instances than those two. |
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* |
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* @see Json The factory produces Json objects from input strings. |
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* @see JsonParser::mutable() |
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* |
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* @return Parser A json parser which creates ImmutableJson objects. |
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*/ |
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public static function create(): Parser |
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{ |
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if (!isset(JsonParser::$thatIs['immutable'])) { |
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JsonParser::$thatIs['immutable'] = new JsonParser(self::IMMUTABLE); |
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} |
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return JsonParser::$thatIs['immutable']; |
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} |
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/** @inheritdoc */ |
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public function mutable(): Parser |
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{ |
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return JsonParser::createMutable(); |
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} |
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/** @inheritdoc */ |
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public function immutable(): Parser |
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{ |
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return JsonParser::create(); |
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} |
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/** @inheritdoc */ |
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public function from(string $jsonInput): Json |
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{ |
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if ($this->makesMutableJson) { |
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return MutableJson::fromString($jsonInput); |
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} |
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return ImmutableJson::fromString($jsonInput); |
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} |
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private static function createMutable(): Parser |
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{ |
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if (!isset(JsonParser::$thatIs['mutable'])) { |
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JsonParser::$thatIs['mutable'] = new JsonParser(self::MUTABLE); |
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} |
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return JsonParser::$thatIs['mutable']; |
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} |
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} |
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Stratadox /
Json
