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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Validator;
/**
* Stores the validator's state during validation.
*
* For example, let's validate the following object graph:
*
* <pre>
* (Person)---($firstName: string)
* \
* ($address: Address)---($street: string)
* </pre>
*
* We validate the <tt>Person</tt> instance, which becomes the "root" of the
* validation run (see {@link getRoot}). The state of the context after the
* first step will be like this:
*
* <pre>
* (Person)---($firstName: string)
* ^ \
* ($address: Address)---($street: string)
* </pre>
*
* The validator is stopped at the <tt>Person</tt> node, both the root and the
* value (see {@link getValue}) of the context point to the <tt>Person</tt>
* instance. The property path is empty at this point (see {@link getPropertyPath}).
* The metadata of the context is the metadata of the <tt>Person</tt> node
* (see {@link getMetadata}).
*
* After advancing to the property <tt>$firstName</tt> of the <tt>Person</tt>
* instance, the state of the context looks like this:
*
* <pre>
* (Person)---($firstName: string)
* \ ^
* ($address: Address)---($street: string)
* </pre>
*
* The validator is stopped at the property <tt>$firstName</tt>. The root still
* points to the <tt>Person</tt> instance, because this is where the validation
* started. The property path is now "firstName" and the current value is the
* value of that property.
*
* After advancing to the <tt>$address</tt> property and then to the
* <tt>$street</tt> property of the <tt>Address</tt> instance, the context state
* looks like this:
*
* <pre>
* (Person)---($firstName: string)
* \
* ($address: Address)---($street: string)
* ^
* </pre>
*
* The validator is stopped at the property <tt>$street</tt>. The root still
* points to the <tt>Person</tt> instance, but the property path is now
* "address.street" and the validated value is the value of that property.
*
* Apart from the root, the property path and the currently validated value,
* the execution context also knows the metadata of the current node (see
* {@link getMetadata}) which for example returns a {@link Mapping\PropertyMetadata}
* or a {@link Mapping\ClassMetadata} object. he context also contains the
* validation group that is currently being validated (see {@link getGroup}) and
* the violations that happened up until now (see {@link getViolations}).
*
* Apart from reading the execution context, you can also use
* {@link addViolation} or {@link addViolationAt} to add new violations and
* {@link validate} or {@link validateValue} to validate values that the
* validator otherwise would not reach.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*
* @api
*/
interface ExecutionContextInterface
{
/**
* Adds a violation at the current node of the validation graph.
*
* @param string $message The error message.
* @param array $params The parameters substituted in the error message.
* @param mixed $invalidValue The invalid, validated value.
* @param integer|null $pluralization The number to use to pluralize of the message.
* @param integer|null $code The violation code.
*
* @api
*/
public function addViolation($message, array $params = array(), $invalidValue = null, $pluralization = null, $code = null);
/**
* Adds a violation at the validation graph node with the given property
* path relative to the current property path.
*
* @param string $subPath The relative property path for the violation.
* @param string $message The error message.
* @param array $params The parameters substituted in the error message.
* @param mixed $invalidValue The invalid, validated value.
* @param integer|null $pluralization The number to use to pluralize of the message.
* @param integer|null $code The violation code.
*
* @api
*/
public function addViolationAt($subPath, $message, array $params = array(), $invalidValue = null, $pluralization = null, $code = null);
/**
* Validates the given value within the scope of the current validation.
*
* The value may be any value recognized by the used metadata factory
* (see {@link MetadataFactoryInterface::getMetadata}), or an array or a
* traversable object of such values.
*
* Usually you validate a value that is not the current node of the
* execution context. For this case, you can pass the {@link $subPath}
* argument which is appended to the current property path when a violation
* is created. For example, take the following object graph:
*
* <pre>
* (Person)---($address: Address)---($phoneNumber: PhoneNumber)
* ^
* </pre>
*
* When the execution context stops at the <tt>Person</tt> instance, the
* property path is "address". When you validate the <tt>PhoneNumber</tt>
* instance now, pass "phoneNumber" as sub path to correct the property path
* to "address.phoneNumber":
*
* <pre>
* $context->validate($address->phoneNumber, 'phoneNumber');
* </pre>
*
* Any violations generated during the validation will be added to the
* violation list that you can access with {@link getViolations}.
*
* @param mixed $value The value to validate.
* @param string $subPath The path to append to the context's property path.
* @param null|string|string[] $groups The groups to validate in. If you don't pass any
* groups here, the current group of the context
* will be used.
* @param Boolean $traverse Whether to traverse the value if it is an array
* or an instance of <tt>\Traversable</tt>.
* @param Boolean $deep Whether to traverse the value recursively if
* it is a collection of collections.
*/
public function validate($value, $subPath = '', $groups = null, $traverse = false, $deep = false);
/**
* Validates a value against a constraint.
*
* Use the parameter <tt>$subPath</tt> to adapt the property path for the
* validated value. For example, take the following object graph:
*
* <pre>
* (Person)---($address: Address)---($street: string)
* ^
* </pre>
*
* When the validator validates the <tt>Address</tt> instance, the
* property path stored in the execution context is "address". When you
* manually validate the property <tt>$street</tt> now, pass the sub path
* "street" to adapt the full property path to "address.street":
*
* <pre>
* $context->validate($address->street, new NotNull(), 'street');
* </pre>
*
* @param mixed $value The value to validate.
* @param Constraint|Constraint[] $constraints The constraint(s) to validate against.
* @param string $subPath The path to append to the context's property path.
* @param null|string|string[] $groups The groups to validate in. If you don't pass any
* groups here, the current group of the context
* will be used.
*/
public function validateValue($value, $constraints, $subPath = '', $groups = null);
/**
* Returns the violations generated by the validator so far.
*
* @return ConstraintViolationListInterface The constraint violation list.
*
* @api
*/
public function getViolations();
/**
* Returns the value at which validation was started in the object graph.
*
* The validator, when given an object, traverses the properties and
* related objects and their properties. The root of the validation is the
* object from which the traversal started.
*
* The current value is returned by {@link getValue}.
*
* @return mixed The root value of the validation.
*/
public function getRoot();
/**
* Returns the value that the validator is currently validating.
*
* If you want to retrieve the object that was originally passed to the
* validator, use {@link getRoot}.
*
* @return mixed The currently validated value.
*/
public function getValue();
/**
* Returns the metadata for the currently validated value.
*
* With the core implementation, this method returns a
* {@link Mapping\ClassMetadata} instance if the current value is an object,
* a {@link Mapping\PropertyMetadata} instance if the current value is
* the value of a property and a {@link Mapping\GetterMetadata} instance if
* the validated value is the result of a getter method.
*
* If the validated value is neither of these, for example if the validator
* has been called with a plain value and constraint, this method returns
* null.
*
* @return MetadataInterface|null The metadata of the currently validated
* value.
*/
public function getMetadata();
/**
* Returns the used metadata factory.
*
* @return MetadataFactoryInterface The metadata factory.
*/
public function getMetadataFactory();
/**
* Returns the validation group that is currently being validated.
*
* @return string The current validation group.
*/
public function getGroup();
/**
* Returns the class name of the current node.
*
* If the metadata of the current node does not implement
* {@link ClassBasedInterface} or if no metadata is available for the
* current node, this method returns null.
*
* @return string|null The class name or null, if no class name could be found.
*/
public function getClassName();
/**
* Returns the property name of the current node.
*
* If the metadata of the current node does not implement
* {@link PropertyMetadataInterface} or if no metadata is available for the
* current node, this method returns null.
*
* @return string|null The property name or null, if no property name could be found.
*/
public function getPropertyName();
/**
* Returns the property path to the value that the validator is currently
* validating.
*
* For example, take the following object graph:
*
* <pre>
* (Person)---($address: Address)---($street: string)
* </pre>
*
* When the <tt>Person</tt> instance is passed to the validator, the
* property path is initially empty. When the <tt>$address</tt> property
* of that person is validated, the property path is "address". When
* the <tt>$street</tt> property of the related <tt>Address</tt> instance
* is validated, the property path is "address.street".
*
* Properties of objects are prefixed with a dot in the property path.
* Indices of arrays or objects implementing the {@link \ArrayAccess}
* interface are enclosed in brackets. For example, if the property in
* the previous example is <tt>$addresses</tt> and contains an array
* of <tt>Address</tt> instance, the property path generated for the
* <tt>$street</tt> property of one of these addresses is for example
* "addresses[0].street".
*
* @param string $subPath Optional. The suffix appended to the current
* property path.
*
* @return string The current property path. The result may be an empty
* string if the validator is currently validating the
* root value of the validation graph.
*/
public function getPropertyPath($subPath = '');
}
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