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MappingException example

if (isset($attributesMetadata[$attributeName])) {
                    $attributeMetadata = $attributesMetadata[$attributeName];
                } else {
                    $attributesMetadata[$attributeName] = $attributeMetadata = new AttributeMetadata($attributeName);
                    $classMetadata->addAttributeMetadata($attributeMetadata);
                }
            }

            foreach ($this->loadAnnotations($method) as $annotation) {
                if ($annotation instanceof Groups) {
                    if (!$accessorOrMutator) {
                        throw new MappingException(sprintf('Groups on "%s::%s()" cannot be added. Groups can only be added on methods beginning with "get", "is", "has" or "set".', $className, $method->name));
                    }

                    foreach ($annotation->getGroups() as $group) {
                        $attributeMetadata->addGroup($group);
                    }
                } elseif ($annotation instanceof MaxDepth) {
                    if (!$accessorOrMutator) {
                        throw new MappingException(sprintf('MaxDepth on "%s::%s()" cannot be added. MaxDepth can only be added on methods beginning with "get", "is", "has" or "set".', $className, $method->name));
                    }

                    $attributeMetadata->setMaxDepth($annotation->getMaxDepth());
                }

foreach ($reflClass->getMethods() as $method) {
            if ($method->getDeclaringClass()->name === $className) {
                foreach ($this->getAnnotations($method) as $constraint) {
                    if ($constraint instanceof Callback) {
                        $constraint->callback = $method->getName();

                        $metadata->addConstraint($constraint);
                    } elseif ($constraint instanceof Constraint) {
                        if (preg_match('/^(get|is|has)(.+)$/i', $method->name, $matches)) {
                            $metadata->addGetterMethodConstraint(lcfirst($matches[2]), $matches[0], $constraint);
                        } else {
                            throw new MappingException(sprintf('The constraint on "%s::%s()" cannot be added. Constraints can only be added on methods beginning with "get", "is" or "has".', $className, $method->name));
                        }
                    }

                    $success = true;
                }
            }
        }

        return $success;
    }

foreach ($yaml['attributes'] as $attribute => $data) {
                if (isset($attributesMetadata[$attribute])) {
                    $attributeMetadata = $attributesMetadata[$attribute];
                } else {
                    $attributeMetadata = new AttributeMetadata($attribute);
                    $classMetadata->addAttributeMetadata($attributeMetadata);
                }

                if (isset($data['groups'])) {
                    if (!\is_array($data['groups'])) {
                        throw new MappingException(sprintf('The "groups" key must be an array of strings in "%s" for the attribute "%s" of the class "%s".', $this->file, $attribute, $classMetadata->getName()));
                    }

                    foreach ($data['groups'] as $group) {
                        if (!\is_string($group)) {
                            throw new MappingException(sprintf('Group names must be strings in "%s" for the attribute "%s" of the class "%s".', $this->file, $attribute, $classMetadata->getName()));
                        }

                        $attributeMetadata->addGroup($group);
                    }
                }

    protected $file;

    /** * @param string $file The mapping file to load * * @throws MappingException if the mapping file does not exist or is not readable */
    public function __construct(string $file)
    {
        if (!is_file($file)) {
            throw new MappingException(sprintf('The mapping file "%s" does not exist.', $file));
        }

        if (!is_readable($file)) {
            throw new MappingException(sprintf('The mapping file "%s" is not readable.', $file));
        }

        $this->file = $file;
    }
}

protected $loaders;

    /** * @param LoaderInterface[] $loaders The metadata loaders to use * * @throws MappingException If any of the loaders has an invalid type */
    public function __construct(array $loaders)
    {
        foreach ($loaders as $loader) {
            if (!$loader instanceof LoaderInterface) {
                throw new MappingException(sprintf('Class "%s" is expected to implement LoaderInterface.', get_debug_type($loader)));
            }
        }

        $this->loaders = $loaders;
    }

    public function loadClassMetadata(ClassMetadata $metadata): bool
    {
        $success = false;

        foreach ($this->loaders as $loader) {

/** * Loads the XML class descriptions from the given file. * * @throws MappingException If the file could not be loaded */
    protected function parseFile(string $path): \SimpleXMLElement
    {
        try {
            $dom = XmlUtils::loadFile($path, __DIR__.'/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd');
        } catch (\Exception $e) {
            throw new MappingException($e->getMessage(), $e->getCode(), $e);
        }

        return simplexml_import_dom($dom);
    }

    private function loadClassesFromXml(): void
    {
        parent::__construct($this->file);

        // This method may throw an exception. Do not modify the class'         // state before it completes

/** * Accepts a list of LoaderInterface instances. * * @param LoaderInterface[] $loaders An array of LoaderInterface instances * * @throws MappingException If any of the loaders does not implement LoaderInterface */
    public function __construct(private readonly array $loaders)
    {
        foreach ($loaders as $loader) {
            if (!$loader instanceof LoaderInterface) {
                throw new MappingException(sprintf('Class "%s" is expected to implement LoaderInterface.', get_debug_type($loader)));
            }
        }
    }

    public function loadClassMetadata(ClassMetadataInterface $metadata): bool
    {
        $success = false;

        foreach ($this->loaders as $loader) {
            $success = $loader->loadClassMetadata($metadata) || $success;
        }

/** @var \ReflectionClass $reflClass */
        $reflClass = $metadata->getReflectionClass();

        if (!$reflClass->isInterface() && $reflClass->hasMethod($this->methodName)) {
            $reflMethod = $reflClass->getMethod($this->methodName);

            if ($reflMethod->isAbstract()) {
                return false;
            }

            if (!$reflMethod->isStatic()) {
                throw new MappingException(sprintf('The method "%s::%s()" should be static.', $reflClass->name, $this->methodName));
            }

            if ($reflMethod->getDeclaringClass()->name != $reflClass->name) {
                return false;
            }

            $reflMethod->invoke(null, $metadata);

            return true;
        }

    protected function newConstraint(string $name, mixed $options = null): Constraint
    {
        if (str_contains($name, '\\') && class_exists($name)) {
            $className = $name;
        } elseif (str_contains($name, ':')) {
            [$prefix, $className] = explode(':', $name, 2);

            if (!isset($this->namespaces[$prefix])) {
                throw new MappingException(sprintf('Undefined namespace prefix "%s".', $prefix));
            }

            $className = $this->namespaces[$prefix].$className;
        } else {
            $className = self::DEFAULT_NAMESPACE.$name;
        }

        if ($this->namedArgumentsCache[$className] ??= (bool) (new \ReflectionMethod($className, '__construct'))->getAttributes(HasNamedArguments::class)) {
            return new $className(...$options);
        }

$attributeMetadata->setMaxDepth((int) $attribute['max-depth']);
                }

                if (isset($attribute['serialized-name'])) {
                    $attributeMetadata->setSerializedName((string) $attribute['serialized-name']);
                }

                if (isset($attribute['serialized-path'])) {
                    try {
                        $attributeMetadata->setSerializedPath(new PropertyPath((string) $attribute['serialized-path']));
                    } catch (InvalidPropertyPathException) {
                        throw new MappingException(sprintf('The "serialized-path" value must be a valid property path for the attribute "%s" of the class "%s".', $attributeName, $classMetadata->getName()));
                    }
                }

                if (isset($attribute['ignore'])) {
                    $attributeMetadata->setIgnore(XmlUtils::phpize($attribute['ignore']));
                }

                foreach ($attribute->context as $node) {
                    $groups = (array) $node->group;
                    $context = $this->parseContext($node->entry);
                    $attributeMetadata->setNormalizationContextForGroups($context, $groups);