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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Stdlib\Hydrator;
use ArrayObject;
use Zend\Stdlib\Exception;
use Zend\Stdlib\Hydrator\Filter\FilterComposite;
use Zend\Stdlib\Hydrator\NamingStrategy\NamingStrategyInterface;
use Zend\Stdlib\Hydrator\Strategy\StrategyInterface;
abstract class AbstractHydrator implements
HydratorInterface,
StrategyEnabledInterface,
FilterEnabledInterface,
NamingStrategyEnabledInterface
{
/**
* The list with strategies that this hydrator has.
*
* @var ArrayObject
*/
protected $strategies;
/**
* An instance of NamingStrategyInterface
*
* @var NamingStrategyInterface
*/
protected $namingStrategy;
/**
* Composite to filter the methods, that need to be hydrated
*
* @var Filter\FilterComposite
*/
protected $filterComposite;
/**
* Initializes a new instance of this class.
*/
public function __construct()
{
$this->strategies = new ArrayObject();
$this->filterComposite = new FilterComposite();
}
/**
* Gets the strategy with the given name.
*
* @param string $name The name of the strategy to get.
*
* @throws \Zend\Stdlib\Exception\InvalidArgumentException
* @return StrategyInterface
*/
public function getStrategy($name)
{
if (isset($this->strategies[$name])) {
return $this->strategies[$name];
}
if (!isset($this->strategies['*'])) {
throw new Exception\InvalidArgumentException(sprintf(
'%s: no strategy by name of "%s", and no wildcard strategy present',
__METHOD__,
$name
));
}
return $this->strategies['*'];
}
/**
* Checks if the strategy with the given name exists.
*
* @param string $name The name of the strategy to check for.
* @return bool
*/
public function hasStrategy($name)
{
return array_key_exists($name, $this->strategies)
|| array_key_exists('*', $this->strategies);
}
/**
* Adds the given strategy under the given name.
*
* @param string $name The name of the strategy to register.
* @param StrategyInterface $strategy The strategy to register.
* @return HydratorInterface
*/
public function addStrategy($name, StrategyInterface $strategy)
{
$this->strategies[$name] = $strategy;
return $this;
}
/**
* Removes the strategy with the given name.
*
* @param string $name The name of the strategy to remove.
* @return HydratorInterface
*/
public function removeStrategy($name)
{
unset($this->strategies[$name]);
return $this;
}
/**
* Converts a value for extraction. If no strategy exists the plain value is returned.
*
* @param string $name The name of the strategy to use.
* @param mixed $value The value that should be converted.
* @param mixed $object The object is optionally provided as context.
* @return mixed
*/
public function extractValue($name, $value, $object = null)
{
if ($this->hasStrategy($name)) {
$strategy = $this->getStrategy($name);
$value = $strategy->extract($value, $object);
}
return $value;
}
/**
* Converts a value for hydration. If no strategy exists the plain value is returned.
*
* @param string $name The name of the strategy to use.
* @param mixed $value The value that should be converted.
* @param array $data The whole data is optionally provided as context.
* @return mixed
*/
public function hydrateValue($name, $value, $data = null)
{
if ($this->hasStrategy($name)) {
$strategy = $this->getStrategy($name);
$value = $strategy->hydrate($value, $data);
}
return $value;
}
/**
* Convert a name for extraction. If no naming strategy exists, the plain value is returned.
*
* @param string $name The name to convert.
* @param null $object The object is optionally provided as context.
* @return mixed
*/
public function extractName($name, $object = null)
{
if ($this->hasNamingStrategy()) {
$name = $this->getNamingStrategy()->extract($name, $object);
}
return $name;
}
/**
* Converts a value for hydration. If no naming strategy exists, the plain value is returned.
*
* @param string $name The name to convert.
* @param array $data The whole data is optionally provided as context.
* @return mixed
*/
public function hydrateName($name, $data = null)
{
if ($this->hasNamingStrategy()) {
$name = $this->getNamingStrategy()->hydrate($name, $data);
}
return $name;
}
/**
* Get the filter instance
*
* @return Filter\FilterComposite
*/
public function getFilter()
{
return $this->filterComposite;
}
/**
* Add a new filter to take care of what needs to be hydrated.
* To exclude e.g. the method getServiceLocator:
*
* <code>
* $composite->addFilter("servicelocator",
* function ($property) {
* list($class, $method) = explode('::', $property);
* if ($method === 'getServiceLocator') {
* return false;
* }
* return true;
* }, FilterComposite::CONDITION_AND
* );
* </code>
*
* @param string $name Index in the composite
* @param callable|Filter\FilterInterface $filter
* @param int $condition
* @return Filter\FilterComposite
*/
public function addFilter($name, $filter, $condition = FilterComposite::CONDITION_OR)
{
return $this->filterComposite->addFilter($name, $filter, $condition);
}
/**
* Check whether a specific filter exists at key $name or not
*
* @param string $name Index in the composite
* @return bool
*/
public function hasFilter($name)
{
return $this->filterComposite->hasFilter($name);
}
/**
* Remove a filter from the composition.
* To not extract "has" methods, you simply need to unregister it
*
* <code>
* $filterComposite->removeFilter('has');
* </code>
*
* @param $name
* @return Filter\FilterComposite
*/
public function removeFilter($name)
{
return $this->filterComposite->removeFilter($name);
}
/**
* Adds the given naming strategy
*
* @param NamingStrategyInterface $strategy The naming to register.
* @return self
*/
public function setNamingStrategy(NamingStrategyInterface $strategy)
{
$this->namingStrategy = $strategy;
return $this;
}
/**
* Gets the naming strategy.
*
* @return NamingStrategyInterface
*/
public function getNamingStrategy()
{
return $this->namingStrategy;
}
/**
* Checks if a naming strategy exists.
*
* @return bool
*/
public function hasNamingStrategy()
{
return isset($this->namingStrategy);
}
/**
* Removes the naming strategy
*
* @return self
*/
public function removeNamingStrategy()
{
$this->namingStrategy = null;
return $this;
}
}