PhutilChunkedIterator.php
b077cfaf1b07stable

PhutilChunkedIterator.php
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			<?php

			/**
			* This is an iterator version of `array_chunk()`.
			*/
			final class PhutilChunkedIterator extends Phobject implements Iterator {

			private $iterator;
			private $size;

			private $key = 0;
			private $current;

			/**
			* @param Iterator
			* @param int
			*/
			public function __construct(Iterator $iterator, $size) {
			$this->iterator = $iterator;
			$this->size = $size;
			}

			public function rewind() {
			$this->iterator->rewind();
			$this->next();
			$this->key = 0;
			}

			/**
			* @return int
			*/
			public function key() {
			return $this->key;
			}

			/**
			* @return array
			*/
			public function current() {
			return $this->current;
			}

			public function next() {
			$this->current = array();
			while ($this->iterator->valid()) {
			$key = $this->iterator->key();
			$this->current[$key] = $this->iterator->current();
			$this->iterator->next();
			if (count($this->current) >= $this->size) {
			break;
			}
			}
			$this->key++;
			}

			public function valid() {
			return (bool)$this->current;
			}

			}