Symfony\Component\Validator\ValidatorFactory

Creates and configures new validator objects

Usually you will use the static method buildDefault() to initialize a
factory with default configuration. To this method you can pass various
parameters that configure where the validator mapping is found. If you
don't pass a parameter, the mapping will be read from annotations.

<code>
// read from annotations only
$factory = ValidatorFactory::buildDefault();

// read from XML and YAML, suppress annotations
$factory = ValidatorFactory::buildDefault(array(
'/path/to/mapping.xml',
'/path/to/other/mapping.yml',
), false);
</code>

You then have to call getValidator() to create new validators.

<code>
$validator = $factory->getValidator();
</code>

When manually constructing a factory, the default configuration of the
validators can be passed to the constructor as a ValidatorContextInterface
object.

<code>
$defaultContext = new ValidatorContext();
$defaultContext->setClassMetadataFactory($metadataFactory);
$defaultContext->setConstraintValidatorFactory($validatorFactory);
$factory = new ValidatorFactory($defaultContext);

$form = $factory->getValidator();
</code>

You can also override the default configuration by calling any of the
methods in this class. These methods return a ValidatorContextInterface object
on which you can override further settings or call getValidator() to create
a form.

<code>
$form = $factory
->setClassMetadataFactory($customFactory);
->getValidator();
</code>

ValidatorFactory instances should be cached and reused in your application.