YamlSymfony.php

<?php

namespace Drupal\Component\Serialization;

use Drupal\Component\Serialization\Exception\InvalidDataTypeException;
use Symfony\Component\Yaml\Parser;
use Symfony\Component\Yaml\Dumper;
use Symfony\Component\Yaml\Yaml as SymfonyYaml;

/**
 * Default serialization for YAML using the Symfony component.
 */
class YamlSymfony implements SerializationInterface {
    
    /**
     * {@inheritdoc}
     */
    public static function encode($data) {
        try {
            // Set the indentation to 2 to match Drupal's coding standards.
            $yaml = new Dumper(2);
            return $yaml->dump($data, PHP_INT_MAX, 0, SymfonyYaml::DUMP_EXCEPTION_ON_INVALID_TYPE | SymfonyYaml::DUMP_MULTI_LINE_LITERAL_BLOCK);
        } catch (\Exception $e) {
            throw new InvalidDataTypeException($e->getMessage(), $e->getCode(), $e);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function decode($raw) {
        try {
            $yaml = new Parser();
            // Make sure we have a single trailing newline. A very simple config like
            // 'foo: bar' with no newline will fail to parse otherwise.
            return $yaml->parse($raw, SymfonyYaml::PARSE_EXCEPTION_ON_INVALID_TYPE);
        } catch (\Exception $e) {
            throw new InvalidDataTypeException($e->getMessage(), $e->getCode(), $e);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function getFileExtension() {
        return 'yml';
    }

}