57 lines
1.3 KiB
PHP
57 lines
1.3 KiB
PHP
<?php
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// DbResultIterator.php
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// Created: 2024-02-06
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// Updated: 2024-02-06
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namespace Index\Data;
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use InvalidArgumentException;
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use Iterator;
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/**
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* Implements an iterator and constructor wrapper for IDbResult.
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*/
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class DbResultIterator implements Iterator {
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private bool $wasValid;
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private object $current;
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/**
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* Call this through an IDbResult instance instead!
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*
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* @param IDbResult $result Result to operate on.
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* @param callable(IDbResult): object $construct Constructor callback.
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*/
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public function __construct(
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private IDbResult $result,
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private $construct
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) {
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if(!is_callable($construct))
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throw new InvalidArgumentException('$construct must be a callable.');
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}
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public function current(): mixed {
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return $this->current;
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}
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public function key(): mixed {
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return spl_object_id($this->current);
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}
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private function moveNext(): void {
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if($this->wasValid = $this->result->next())
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$this->current = ($this->construct)($this->result);
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}
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public function next(): void {
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$this->moveNext();
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}
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public function rewind(): void {
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$this->moveNext();
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}
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public function valid(): bool {
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return $this->wasValid;
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}
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}
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