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<?php |
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namespace Metabor\Callback; |
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use MetaborStd\CallbackInterface; |
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use Symfony\Component\ExpressionLanguage\Expression; |
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use Symfony\Component\ExpressionLanguage\ExpressionLanguage; |
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use Symfony\Component\ExpressionLanguage\ParsedExpression; |
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/** |
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* @author otischlinger |
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*/ |
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class SymfonyExpression extends Expression implements CallbackInterface |
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{ |
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/** |
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* @var ExpressionLanguage |
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*/ |
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private $expressionLanguage; |
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/** |
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* @var ParsedExpression |
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*/ |
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private $parsedExpression; |
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/** |
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* @var array |
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*/ |
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private $keys; |
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/** |
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* @param string $expression |
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* @param array $keys |
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* @param ExpressionLanguage $expressionLanguage |
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*/ |
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public function __construct($expression, array $keys = array(), ExpressionLanguage $expressionLanguage = null) |
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{ |
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parent::__construct($expression); |
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$this->keys = $keys; |
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if ($expressionLanguage) { |
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$this->expressionLanguage = $expressionLanguage; |
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} else { |
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$this->expressionLanguage = new ExpressionLanguage(); |
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} |
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} |
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/** |
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* @return \Symfony\Component\ExpressionLanguage\ParsedExpression |
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*/ |
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protected function getExpression() |
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{ |
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if (!$this->parsedExpression) { |
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$this->parsedExpression = $this->expressionLanguage->parse($this, $this->keys); |
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} |
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return $this->parsedExpression; |
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} |
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/** |
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* @return string |
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*/ |
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public function __invoke() |
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{ |
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if (empty($this->keys)) { |
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$values = array(); |
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} else { |
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$args = func_get_args(); |
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$values = array_combine($this->keys, $args); |
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} |
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return $this->expressionLanguage->evaluate($this->getExpression(), $values); |
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} |
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/** |
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* @return array |
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*/ |
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public function getKeys() |
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{ |
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return $this->keys; |
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} |
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} |
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Metabor /
Statemachine
