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<?php namespace Doctrine\Common\Collections; /** * Interface for collections that allow efficient filtering with an expression API. * * Goal of this interface is a backend independent method to fetch elements * from a collections. {@link Expression} is crafted in a way that you can * implement queries from both in-memory and database-backed collections. * * For database backed collections this allows very efficient access by * utilizing the query APIs, for example SQL in the ORM. Applications using * this API can implement efficient database access without having to ask the * EntityManager or Repositories. * * @psalm-template TKey as array-key * @psalm-template T */ interface Selectable { /** * Selects all elements from a selectable that match the expression and * returns a new collection containing these elements. * * @return Collection<mixed>&Selectable<mixed> * @psalm-return Collection<TKey,T>&Selectable<TKey,T> */ public function matching(Criteria $criteria); }