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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\Config\Definition;
use Symfony\Component\Config\Definition\Exception\Exception;
use Symfony\Component\Config\Definition\Exception\ForbiddenOverwriteException;
use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;
use Symfony\Component\Config\Definition\Exception\InvalidTypeException;
/**
* The base node class.
*
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
*/
abstract class BaseNode implements NodeInterface
{
protected $name;
protected $parent;
protected $normalizationClosures = array();
protected $finalValidationClosures = array();
protected $allowOverwrite = true;
protected $required = false;
protected $equivalentValues = array();
protected $attributes = array();
/**
* Constructor.
*
* @param string $name The name of the node
* @param NodeInterface $parent The parent of this node
*
* @throws \InvalidArgumentException if the name contains a period.
*/
public function __construct($name, NodeInterface $parent = null)
{
if (false !== strpos($name, '.')) {
throw new \InvalidArgumentException('The name must not contain ".".');
}
$this->name = $name;
$this->parent = $parent;
}
public function setAttribute($key, $value)
{
$this->attributes[$key] = $value;
}
public function getAttribute($key, $default = null)
{
return isset($this->attributes[$key]) ? $this->attributes[$key] : $default;
}
public function hasAttribute($key)
{
return isset($this->attributes[$key]);
}
public function getAttributes()
{
return $this->attributes;
}
public function setAttributes(array $attributes)
{
$this->attributes = $attributes;
}
public function removeAttribute($key)
{
unset($this->attributes[$key]);
}
/**
* Sets an info message.
*
* @param string $info
*/
public function setInfo($info)
{
$this->setAttribute('info', $info);
}
/**
* Returns info message.
*
* @return string The info text
*/
public function getInfo()
{
return $this->getAttribute('info');
}
/**
* Sets the example configuration for this node.
*
* @param string|array $example
*/
public function setExample($example)
{
$this->setAttribute('example', $example);
}
/**
* Retrieves the example configuration for this node.
*
* @return string|array The example
*/
public function getExample()
{
return $this->getAttribute('example');
}
/**
* Adds an equivalent value.
*
* @param mixed $originalValue
* @param mixed $equivalentValue
*/
public function addEquivalentValue($originalValue, $equivalentValue)
{
$this->equivalentValues[] = array($originalValue, $equivalentValue);
}
/**
* Set this node as required.
*
* @param bool $boolean Required node
*/
public function setRequired($boolean)
{
$this->required = (bool) $boolean;
}
/**
* Sets if this node can be overridden.
*
* @param bool $allow
*/
public function setAllowOverwrite($allow)
{
$this->allowOverwrite = (bool) $allow;
}
/**
* Sets the closures used for normalization.
*
* @param \Closure[] $closures An array of Closures used for normalization
*/
public function setNormalizationClosures(array $closures)
{
$this->normalizationClosures = $closures;
}
/**
* Sets the closures used for final validation.
*
* @param \Closure[] $closures An array of Closures used for final validation
*/
public function setFinalValidationClosures(array $closures)
{
$this->finalValidationClosures = $closures;
}
/**
* Checks if this node is required.
*
* @return bool
*/
public function isRequired()
{
return $this->required;
}
/**
* Returns the name of this node.
*
* @return string The Node's name.
*/
public function getName()
{
return $this->name;
}
/**
* Retrieves the path of this node.
*
* @return string The Node's path
*/
public function getPath()
{
$path = $this->name;
if (null !== $this->parent) {
$path = $this->parent->getPath().'.'.$path;
}
return $path;
}
/**
* Merges two values together.
*
* @param mixed $leftSide
* @param mixed $rightSide
*
* @return mixed The merged value
*
* @throws ForbiddenOverwriteException
*/
final public function merge($leftSide, $rightSide)
{
if (!$this->allowOverwrite) {
throw new ForbiddenOverwriteException(sprintf(
'Configuration path "%s" cannot be overwritten. You have to '
.'define all options for this path, and any of its sub-paths in '
.'one configuration section.',
$this->getPath()
));
}
$this->validateType($leftSide);
$this->validateType($rightSide);
return $this->mergeValues($leftSide, $rightSide);
}
/**
* Normalizes a value, applying all normalization closures.
*
* @param mixed $value Value to normalize.
*
* @return mixed The normalized value.
*/
final public function normalize($value)
{
$value = $this->preNormalize($value);
// run custom normalization closures
foreach ($this->normalizationClosures as $closure) {
$value = $closure($value);
}
// replace value with their equivalent
foreach ($this->equivalentValues as $data) {
if ($data[0] === $value) {
$value = $data[1];
}
}
// validate type
$this->validateType($value);
// normalize value
return $this->normalizeValue($value);
}
/**
* Normalizes the value before any other normalization is applied.
*
* @param $value
*
* @return $value The normalized array value
*/
protected function preNormalize($value)
{
return $value;
}
/**
* Returns parent node for this node.
*
* @return NodeInterface|null
*/
public function getParent()
{
return $this->parent;
}
/**
* Finalizes a value, applying all finalization closures.
*
* @param mixed $value The value to finalize
*
* @return mixed The finalized value
*
* @throws Exception
* @throws InvalidConfigurationException
*/
final public function finalize($value)
{
$this->validateType($value);
$value = $this->finalizeValue($value);
// Perform validation on the final value if a closure has been set.
// The closure is also allowed to return another value.
foreach ($this->finalValidationClosures as $closure) {
try {
$value = $closure($value);
} catch (Exception $correctEx) {
throw $correctEx;
} catch (\Exception $invalid) {
throw new InvalidConfigurationException(sprintf(
'Invalid configuration for path "%s": %s',
$this->getPath(),
$invalid->getMessage()
), $invalid->getCode(), $invalid);
}
}
return $value;
}
/**
* Validates the type of a Node.
*
* @param mixed $value The value to validate
*
* @throws InvalidTypeException when the value is invalid
*/
abstract protected function validateType($value);
/**
* Normalizes the value.
*
* @param mixed $value The value to normalize.
*
* @return mixed The normalized value
*/
abstract protected function normalizeValue($value);
/**
* Merges two values together.
*
* @param mixed $leftSide
* @param mixed $rightSide
*
* @return mixed The merged value
*/
abstract protected function mergeValues($leftSide, $rightSide);
/**
* Finalizes a value.
*
* @param mixed $value The value to finalize
*
* @return mixed The finalized value
*/
abstract protected function finalizeValue($value);
}
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