class ExecutionContext

class ExecutionContext implements ExecutionContextInterface {
    
    /**
     * @var \Symfony\Component\Validator\Validator\ValidatorInterface
     */
    protected $validator;
    
    /**
     * The root value of the validated object graph.
     *
     * @var mixed
     */
    protected $root;
    
    /**
     * @var \Drupal\Core\Validation\TranslatorInterface
     */
    protected $translator;
    
    /**
     * @var string
     */
    protected $translationDomain;
    
    /**
     * The violations generated in the current context.
     *
     * @var \Symfony\Component\Validator\ConstraintViolationList
     */
    protected $violations;
    
    /**
     * The currently validated value.
     *
     * @var mixed
     */
    protected $value;
    
    /**
     * The currently validated typed data object.
     *
     * @var \Drupal\Core\TypedData\TypedDataInterface
     */
    protected $data;
    
    /**
     * The property path leading to the current value.
     *
     * @var string
     */
    protected $propertyPath = '';
    
    /**
     * The current validation metadata.
     *
     * @var \Symfony\Component\Validator\Mapping\MetadataInterface|null
     */
    protected $metadata;
    
    /**
     * The currently validated group.
     *
     * @var string|null
     */
    protected $group;
    
    /**
     * The currently validated constraint.
     *
     * @var \Symfony\Component\Validator\Constraint|null
     */
    protected $constraint;
    
    /**
     * Stores which objects have been validated in which group.
     *
     * @var array
     */
    protected $validatedObjects = [];
    
    /**
     * Stores which class constraint has been validated for which object.
     *
     * @var array
     */
    protected $validatedConstraints = [];
    
    /**
     * Creates a new ExecutionContext.
     *
     * @param \Symfony\Component\Validator\Validator\ValidatorInterface $validator
     *   The validator.
     * @param mixed $root
     *   The root.
     * @param \Drupal\Core\Validation\TranslatorInterface $translator
     *   The translator.
     * @param string $translationDomain
     *   (optional) The translation domain.
     *
     * @internal Called by \Drupal\Core\TypedData\Validation\ExecutionContextFactory.
     *    Should not be used in user code.
     */
    public function __construct(ValidatorInterface $validator, $root, TranslatorInterface $translator, $translationDomain = NULL) {
        $this->validator = $validator;
        $this->root = $root;
        $this->translator = $translator;
        $this->translationDomain = $translationDomain;
        $this->violations = new ConstraintViolationList();
    }
    
    /**
     * {@inheritdoc}
     */
    public function setNode($value, $object, MetadataInterface $metadata = NULL, $propertyPath) {
        $this->value = $value;
        $this->data = $object;
        $this->metadata = $metadata;
        $this->propertyPath = (string) $propertyPath;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setGroup($group) {
        $this->group = $group;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setConstraint(Constraint $constraint) {
        $this->constraint = $constraint;
    }
    
    /**
     * {@inheritdoc}
     */
    public function addViolation($message, array $parameters = [], $invalidValue = NULL, $plural = NULL, $code = NULL) {
        // The parameters $invalidValue and following are ignored by the new
        // API, as they are not present in the new interface anymore.
        // You should use buildViolation() instead.
        if (func_num_args() > 2) {
            throw new \LogicException('Legacy validator API is unsupported.');
        }
        $this->violations
            ->add(new ConstraintViolation($this->translator
            ->trans($message, $parameters, $this->translationDomain), $message, $parameters, $this->root, $this->propertyPath, $this->value, NULL, NULL, $this->constraint));
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildViolation($message, array $parameters = []) : ConstraintViolationBuilderInterface {
        return new ConstraintViolationBuilder($this->violations, $this->constraint, $message, $parameters, $this->root, $this->propertyPath, $this->value, $this->translator, $this->translationDomain);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getViolations() {
        return $this->violations;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getValidator() {
        return $this->validator;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getRoot() {
        return $this->root;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getValue() {
        return $this->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getObject() : ?object {
        return $this->data;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getMetadata() : ?MetadataInterface {
        return $this->metadata;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getGroup() : ?string {
        return Constraint::DEFAULT_GROUP;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getClassName() : ?string {
        return get_class($this->data);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getPropertyName() : ?string {
        return $this->data
            ->getName();
    }
    
    /**
     * {@inheritdoc}
     */
    public function getPropertyPath($sub_path = '') : string {
        return PropertyPath::append($this->propertyPath, $sub_path);
    }
    
    /**
     * {@inheritdoc}
     */
    public function addViolationAt($subPath, $message, array $parameters = [], $invalidValue = NULL, $plural = NULL, $code = NULL) {
        throw new \LogicException('Legacy validator API is unsupported.');
    }
    
    /**
     * {@inheritdoc}
     */
    public function validate($value, $subPath = '', $groups = NULL, $traverse = FALSE, $deep = FALSE) {
        throw new \LogicException('Legacy validator API is unsupported.');
    }
    
    /**
     * {@inheritdoc}
     */
    public function markConstraintAsValidated($cache_key, $constraint_hash) {
        $this->validatedConstraints[$cache_key . ':' . $constraint_hash] = TRUE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isConstraintValidated($cache_key, $constraint_hash) {
        return isset($this->validatedConstraints[$cache_key . ':' . $constraint_hash]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function validateValue($value, $constraints, $subPath = '', $groups = NULL) {
        throw new \LogicException('Legacy validator API is unsupported.');
    }
    
    /**
     * {@inheritdoc}
     */
    public function markGroupAsValidated($cache_key, $group_hash) {
        $this->validatedObjects[$cache_key][$group_hash] = TRUE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isGroupValidated($cache_key, $group_hash) {
        return isset($this->validatedObjects[$cache_key][$group_hash]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function markObjectAsInitialized($cache_key) {
        // Not supported, so nothing todo.
    }
    
    /**
     * {@inheritdoc}
     */
    public function isObjectInitialized($cache_key) {
        // Not supported, so nothing todo.
    }
    
    /**
     * {@inheritdoc}
     */
    public function getMetadataFactory() {
        throw new \LogicException('Legacy validator API is unsupported.');
    }

}