Viewing file:  ProcessorChain.php (3.1 KB) -rw-r--r--
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<?php
/*
* This file is part of the Predis package.
*
* (c) 2009-2020 Daniele Alessandri
* (c) 2021-2025 Till Krüss
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Predis\Command\Processor;
use ArrayAccess;
use ArrayIterator;
use InvalidArgumentException;
use Predis\Command\CommandInterface;
use ReturnTypeWillChange;
use Traversable;
/**
* Default implementation of a command processors chain.
*/
class ProcessorChain implements ArrayAccess, ProcessorInterface
{
private $processors = [];
/**
* @param array $processors List of instances of ProcessorInterface.
*/
public function __construct($processors = [])
{
foreach ($processors as $processor) {
$this->add($processor);
}
}
/**
* {@inheritdoc}
*/
public function add(ProcessorInterface $processor)
{
$this->processors[] = $processor;
}
/**
* {@inheritdoc}
*/
public function remove(ProcessorInterface $processor)
{
if (false !== $index = array_search($processor, $this->processors, true)) {
unset($this[$index]);
}
}
/**
* {@inheritdoc}
*/
public function process(CommandInterface $command)
{
for ($i = 0; $i < $count = count($this->processors); ++$i) {
$this->processors[$i]->process($command);
}
}
/**
* {@inheritdoc}
*/
public function getProcessors()
{
return $this->processors;
}
/**
* Returns an iterator over the list of command processor in the chain.
*
* @return Traversable<int, ProcessorInterface>
*/
public function getIterator()
{
return new ArrayIterator($this->processors);
}
/**
* Returns the number of command processors in the chain.
*
* @return int
*/
public function count()
{
return count($this->processors);
}
/**
* @param int $index
* @return bool
*/
#[ReturnTypeWillChange]
public function offsetExists($index)
{
return isset($this->processors[$index]);
}
/**
* @param int $index
* @return ProcessorInterface
*/
#[ReturnTypeWillChange]
public function offsetGet($index)
{
return $this->processors[$index];
}
/**
* @param int $index
* @param ProcessorInterface $processor
* @return void
*/
#[ReturnTypeWillChange]
public function offsetSet($index, $processor)
{
if (!$processor instanceof ProcessorInterface) {
throw new InvalidArgumentException(
'Processor chain accepts only instances of `Predis\Command\Processor\ProcessorInterface`'
);
}
$this->processors[$index] = $processor;
}
/**
* @param int $index
* @return void
*/
#[ReturnTypeWillChange]
public function offsetUnset($index)
{
unset($this->processors[$index]);
$this->processors = array_values($this->processors);
}
}
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