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<?php
namespace Mattbit\Flat\Query\Expression;
use Mattbit\Flat\Query\Expression\Leaf\EqExpression;
use Mattbit\Flat\Query\Expression\Leaf\Expression;
use Mattbit\Flat\Query\Expression\Leaf\InExpression;
use Mattbit\Flat\Query\Expression\Tree\NotExpression;
class Factory
{
private $namespace = 'Mattbit\Flat\Query\Expression';
/**
* Return an Expression based on the operator.
*
* @param $operator
* @param $key
* @param $reference
* @return ExpressionInterface
* @throws \Exception
*/
public function make($operator, $key = null, $reference = null)
switch ($operator) {
// Leaf expressions
case Type::EQ:
case Type::GT:
case Type::GTE:
case Type::LT:
case Type::LTE:
case Type::IN:
case Type::REGEX:
$class = $this->classFromOperator('Leaf', $operator);
return new $class($key, $reference);
// Tree expressions
case Type::AND_MATCH:
case Type::OR_MATCH:
case Type::NOT:
$class = $this->classFromOperator('Tree', $operator);
return new $class();
// Negations
case Type::NE:
return new NotExpression([new EqExpression($key, $reference)]);
case Type::NIN:
return new NotExpression([new InExpression($key, $reference)]);
default:
throw new \Exception("Unknown operator `$operator`.");
}
protected function classFromOperator($prefix, $operator)
return sprintf(
'%s\%s\%sExpression',
$this->namespace,
$prefix,
ucfirst(ltrim($operator, '$'))
);
mattbit /
flat
