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File: CallbackIterator.php
<?php /* * Copyright 2017-present MongoDB, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ namespace MongoDB\Model; use Closure; use Iterator; use IteratorIterator; use ReturnTypeWillChange; use Traversable; /** * Iterator to apply a callback before returning an element * * @internal */ class CallbackIterator implements Iterator { /** @var Closure */ private $callback; /** @var Iterator */ private $iterator; public function __construct(Traversable $traversable, Closure $callback) { $this->iterator = $traversable instanceof Iterator ? $traversable : new IteratorIterator($traversable); $this->callback = $callback; } /** * @see http://php.net/iterator.current * @return mixed */ #[ReturnTypeWillChange] public function current() { return ($this->callback)($this->iterator->current()); } /** * @see http://php.net/iterator.key * @return mixed */ #[ReturnTypeWillChange] public function key() { return $this->iterator->key(); } /** * @see http://php.net/iterator.next * @return void */ #[ReturnTypeWillChange] public function next() { $this->iterator->next(); } /** * @see http://php.net/iterator.rewind * @return void */ #[ReturnTypeWillChange] public function rewind() { $this->iterator->rewind(); } /** * @see http://php.net/iterator.valid * @return boolean */ #[ReturnTypeWillChange] public function valid() { return $this->iterator->valid(); } }