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Viewing: YamlSerializationVisitor.php

<?php

namespace JMS\Serializer;

use JMS\Serializer\Accessor\AccessorStrategyInterface;
use JMS\Serializer\Metadata\ClassMetadata;
use JMS\Serializer\Metadata\PropertyMetadata;
use JMS\Serializer\Naming\AdvancedNamingStrategyInterface;
use JMS\Serializer\Naming\PropertyNamingStrategyInterface;
use JMS\Serializer\Util\Writer;
use Symfony\Component\Yaml\Inline;

/**
 * Serialization Visitor for the YAML format.
 *
 * @see http://www.yaml.org/spec/
 * @author Johannes M. Schmitt <schmittjoh@gmail.com>
 */
class YamlSerializationVisitor extends AbstractVisitor
{
    public $writer;

    private $navigator;
    private $stack;
    private $metadataStack;
    private $currentMetadata;

    public function __construct($namingStrategy, AccessorStrategyInterface $accessorStrategy = null)
    {
        parent::__construct($namingStrategy, $accessorStrategy);

        $this->writer = new Writer();
    }

    public function setNavigator(GraphNavigator $navigator)
    {
        $this->navigator = $navigator;
        $this->writer->reset();
        $this->stack = new \SplStack;
        $this->metadataStack = new \SplStack;
    }

    public function visitNull($data, array $type, Context $context)
    {
        if ('' === $this->writer->content) {
            $this->writer->writeln('null');
        }

        return 'null';
    }

    public function visitString($data, array $type, Context $context)
    {
        $v = Inline::dump($data);

        if ('' === $this->writer->content) {
            $this->writer->writeln($v);
        }

        return $v;
    }

    /**
     * @param array $data
     * @param array $type
     */
    public function visitArray($data, array $type, Context $context)
    {
        $isHash = isset($type['params'][1]);

        $count = $this->writer->changeCount;
        $isList = (isset($type['params'][0]) && !isset($type['params'][1]))
            || array_keys($data) === range(0, \count($data) - 1);

        foreach ($data as $k => $v) {
            if (null === $v && $context->shouldSerializeNull() !== true) {
                continue;
            }

            if ($isList && !$isHash) {
                $this->writer->writeln('-');
            } else {
                $this->writer->writeln(Inline::dump($k) . ':');
            }

            $this->writer->indent();

            if (null !== $v = $this->navigator->accept($v, $this->getElementType($type), $context)) {
                $this->writer
                    ->rtrim(false)
                    ->writeln(' ' . $v);
            }

            $this->writer->outdent();
        }

        if ($count === $this->writer->changeCount && isset($type['params'][1])) {
            $this->writer
                ->rtrim(false)
                ->writeln(' {}');
        } elseif (empty($data)) {
            $this->writer
                ->rtrim(false)
                ->writeln(' []');
        }
    }

    public function visitBoolean($data, array $type, Context $context)
    {
        $v = $data ? 'true' : 'false';

        if ('' === $this->writer->content) {
            $this->writer->writeln($v);
        }

        return $v;
    }

    public function visitDouble($data, array $type, Context $context)
    {
        $v = (string)$data;

        if ('' === $this->writer->content) {
            $this->writer->writeln($v);
        }

        return $v;
    }

    public function visitInteger($data, array $type, Context $context)
    {
        $v = (string)$data;

        if ('' === $this->writer->content) {
            $this->writer->writeln($v);
        }

        return $v;
    }

    public function startVisitingObject(ClassMetadata $metadata, $data, array $type, Context $context)
    {
    }

    public function visitProperty(PropertyMetadata $metadata, $data, Context $context)
    {
        $v = $this->accessor->getValue($data, $metadata);

        if (null === $v && $context->shouldSerializeNull() !== true) {
            return;
        }

        if ($this->namingStrategy instanceof AdvancedNamingStrategyInterface) {
            $name = $this->namingStrategy->getPropertyName($metadata, $context);
        } else {
            $name = $this->namingStrategy->translateName($metadata);
        }

        if (!$metadata->inline) {
            $this->writer
                ->writeln(Inline::dump($name) . ':')
                ->indent();
        }

        $this->setCurrentMetadata($metadata);

        $count = $this->writer->changeCount;

        if (null !== $v = $this->navigator->accept($v, $metadata->type, $context)) {
            $this->writer
                ->rtrim(false)
                ->writeln(' ' . $v);
        } elseif ($count === $this->writer->changeCount && !$metadata->inline) {
            $this->writer->revert();
        }

        if (!$metadata->inline) {
            $this->writer->outdent();
        }
        $this->revertCurrentMetadata();
    }

    public function endVisitingObject(ClassMetadata $metadata, $data, array $type, Context $context)
    {
    }

    public function setCurrentMetadata(PropertyMetadata $metadata)
    {
        $this->metadataStack->push($this->currentMetadata);
        $this->currentMetadata = $metadata;
    }

    public function revertCurrentMetadata()
    {
        return $this->currentMetadata = $this->metadataStack->pop();
    }

    public function getNavigator()
    {
        return $this->navigator;
    }

    public function getResult()
    {
        return $this->writer->getContent();
    }
}
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