JsonView.php

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<?php
namespace TYPO3\CMS\Extbase\Mvc\View;

class JsonView extends \TYPO3\CMS\Extbase\Mvc\View\AbstractView {

    const EXPOSE_CLASSNAME_FULLY_QUALIFIED = 1;

    const EXPOSE_CLASSNAME_UNQUALIFIED = 2;

    protected $reflectionService;

    protected $controllerContext;

    protected $variablesToRender = array('value');

    protected $configuration = array();

    protected $persistenceManager;

    public function setVariablesToRender(array $variablesToRender) {
        $this->variablesToRender = $variablesToRender;
    }

    public function setConfiguration(array $configuration) {
        $this->configuration = $configuration;
    }

    public function render() {
        $this->controllerContext->getResponse()->setHeader('Content-Type', 'application/json');
        $propertiesToRender = $this->renderArray();
        return json_encode($propertiesToRender);
    }

    protected function renderArray() {
        if (count($this->variablesToRender) === 1) {
            $variableName = current($this->variablesToRender);
            $valueToRender = isset($this->variables[$variableName]) ? $this->variables[$variableName] : NULL;
            $configuration = isset($this->configuration[$variableName]) ? $this->configuration[$variableName] : array();
        } else {
            $valueToRender = array();
            foreach ($this->variablesToRender as $variableName) {
                $valueToRender[$variableName] = isset($this->variables[$variableName]) ? $this->variables[$variableName] : NULL;
            }
            $configuration = $this->configuration;
        }
        return $this->transformValue($valueToRender, $configuration);
    }

    protected function transformValue($value, array $configuration) {
        if (is_array($value) || $value instanceof \ArrayAccess) {
            $array = array();
            foreach ($value as $key => $element) {
                if (isset($configuration['_descendAll']) && is_array($configuration['_descendAll'])) {
                    $array[$key] = $this->transformValue($element, $configuration['_descendAll']);
                } else {
                    if (isset($configuration['_only']) && is_array($configuration['_only']) && !in_array($key, $configuration['_only'])) {
                        continue;
                    }
                    if (isset($configuration['_exclude']) && is_array($configuration['_exclude']) && in_array($key, $configuration['_exclude'])) {
                        continue;
                    }
                    $array[$key] = $this->transformValue($element, isset($configuration[$key]) ? $configuration[$key] : array());
                }
            }
            return $array;
        } elseif (is_object($value)) {
            return $this->transformObject($value, $configuration);
        } else {
            return $value;
        }
    }

    protected function transformObject($object, array $configuration) {
        if ($object instanceof \DateTime) {
            return $object->format(\DateTime::ISO8601);
        } else {
            $propertyNames = \TYPO3\CMS\Extbase\Reflection\ObjectAccess::getGettablePropertyNames($object);

            $propertiesToRender = array();
            foreach ($propertyNames as $propertyName) {
                if (isset($configuration['_only']) && is_array($configuration['_only']) && !in_array($propertyName, $configuration['_only'])) {
                    continue;
                }
                if (isset($configuration['_exclude']) && is_array($configuration['_exclude']) && in_array($propertyName, $configuration['_exclude'])) {
                    continue;
                }

                $propertyValue = \TYPO3\CMS\Extbase\Reflection\ObjectAccess::getProperty($object, $propertyName);

                if (!is_array($propertyValue) && !is_object($propertyValue)) {
                    $propertiesToRender[$propertyName] = $propertyValue;
                } elseif (isset($configuration['_descend']) && array_key_exists($propertyName, $configuration['_descend'])) {
                    $propertiesToRender[$propertyName] = $this->transformValue($propertyValue, $configuration['_descend'][$propertyName]);
                }
            }
            if (isset($configuration['_exposeObjectIdentifier']) && $configuration['_exposeObjectIdentifier'] === TRUE) {
                if (isset($configuration['_exposedObjectIdentifierKey']) && strlen($configuration['_exposedObjectIdentifierKey']) > 0) {
                    $identityKey = $configuration['_exposedObjectIdentifierKey'];
                } else {
                    $identityKey = '__identity';
                }
                $propertiesToRender[$identityKey] = $this->persistenceManager->getIdentifierByObject($object);
            }
            if (isset($configuration['_exposeClassName']) && ($configuration['_exposeClassName'] === self::EXPOSE_CLASSNAME_FULLY_QUALIFIED || $configuration['_exposeClassName'] === self::EXPOSE_CLASSNAME_UNQUALIFIED)) {
                $className = get_class($object);
                $classNameParts = explode('\\', $className);
                $propertiesToRender['__class'] = ($configuration['_exposeClassName'] === self::EXPOSE_CLASSNAME_FULLY_QUALIFIED ? $className : array_pop($classNameParts));
            }

            return $propertiesToRender;
        }
    }
}