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<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Ui\Config\Argument\Parser;
use Magento\Ui\Config\Argument\ParserInterface;
/**
* This class is a composite of parsers which converts XML nodes to array
*/
class Composite implements ParserInterface
{
/**
* Format: array('<name>' => <instance>, ...)
*
* @var ParserInterface[]
*/
private $parsers;
/**
* Data key that holds name of an parser to be used for that data
*
* @var string
*/
private $discriminator;
/**
* @param ParserInterface[] $parsers
* @param string $discriminator
* @throws \InvalidArgumentException if parser isn't implement parser interface
*/
public function __construct(array $parsers, $discriminator)
{
foreach ($parsers as $parserName => $parserInstance) {
if (!$parserInstance instanceof ParserInterface) {
throw new \InvalidArgumentException(
"Parser named '{$parserName}' is expected to be an argument parser instance."
);
}
}
$this->parsers = $parsers;
$this->discriminator = $discriminator;
}
/**
* @inheritdoc
* @throws \InvalidArgumentException if discriminator isn't passed
*/
public function parse(array $data, \DOMNode $node)
{
if (!isset($data[$this->discriminator])) {
throw new \InvalidArgumentException(
sprintf('Value for key "%s" is missing in the argument data.', $this->discriminator)
);
}
$parserName = $data[$this->discriminator];
$parser = $this->getParser($parserName);
return $parser->parse($data, $node);
}
/**
* Register parser instance under a given unique name
*
* @param string $name
* @param ParserInterface $instance
* @return void
* @throws \InvalidArgumentException if parser has already been defined
*/
public function addParser($name, ParserInterface $instance)
{
if (isset($this->parsers[$name])) {
throw new \InvalidArgumentException("Argument parser named '{$name}' has already been defined.");
}
$this->parsers[$name] = $instance;
}
/**
* Retrieve parser instance by its unique name
*
* @param string $name
* @return ParserInterface
* @throws \InvalidArgumentException if the parser hasn't already been defined
*/
private function getParser($name)
{
if (!isset($this->parsers[$name])) {
throw new \InvalidArgumentException("Argument parser named '{$name}' has not been defined.");
}
return $this->parsers[$name];
}
}