Current File : /home/tjamichg/cursos.tjamich.gob.mx/vendor/symfony/form/ChoiceList/LazyChoiceList.php
<?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\Form\ChoiceList;
use Symfony\Component\Form\ChoiceList\Loader\ChoiceLoaderInterface;
/**
* A choice list that loads its choices lazily.
*
* The choices are fetched using a {@link ChoiceLoaderInterface} instance.
* If only {@link getChoicesForValues()} or {@link getValuesForChoices()} is
* called, the choice list is only loaded partially for improved performance.
*
* Once {@link getChoices()} or {@link getValues()} is called, the list is
* loaded fully.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class LazyChoiceList implements ChoiceListInterface
{
/**
* The choice loader.
*
* @var ChoiceLoaderInterface
*/
private $loader;
/**
* The callable creating string values for each choice.
*
* If null, choices are simply cast to strings.
*
* @var null|callable
*/
private $value;
/**
* @var ChoiceListInterface|null
*
* @deprecated Since 3.1, to be removed in 4.0. Cache the choice list in the {@link ChoiceLoaderInterface} instead.
*/
private $loadedList;
/**
* @var bool
*
* @deprecated Flag used for BC layer since 3.1. To be removed in 4.0.
*/
private $loaded = false;
/**
* Creates a lazily-loaded list using the given loader.
*
* Optionally, a callable can be passed for generating the choice values.
* The callable receives the choice as first and the array key as the second
* argument.
*
* @param ChoiceLoaderInterface $loader The choice loader
* @param null|callable $value The callable generating the choice
* values
*/
public function __construct(ChoiceLoaderInterface $loader, callable $value = null)
{
$this->loader = $loader;
$this->value = $value;
}
/**
* {@inheritdoc}
*/
public function getChoices()
{
if ($this->loaded) {
// We can safely invoke the {@link ChoiceLoaderInterface} assuming it has the list
// in cache when the lazy list is already loaded
if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
@trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
}
return $this->loadedList->getChoices();
}
// BC
$this->loadedList = $this->loader->loadChoiceList($this->value);
$this->loaded = true;
return $this->loadedList->getChoices();
// In 4.0 keep the following line only:
// return $this->loader->loadChoiceList($this->value)->getChoices()
}
/**
* {@inheritdoc}
*/
public function getValues()
{
if ($this->loaded) {
// Check whether the loader has the same cache
if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
@trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
}
return $this->loadedList->getValues();
}
// BC
$this->loadedList = $this->loader->loadChoiceList($this->value);
$this->loaded = true;
return $this->loadedList->getValues();
// In 4.0 keep the following line only:
// return $this->loader->loadChoiceList($this->value)->getValues()
}
/**
* {@inheritdoc}
*/
public function getStructuredValues()
{
if ($this->loaded) {
// Check whether the loader has the same cache
if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
@trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
}
return $this->loadedList->getStructuredValues();
}
// BC
$this->loadedList = $this->loader->loadChoiceList($this->value);
$this->loaded = true;
return $this->loadedList->getStructuredValues();
// In 4.0 keep the following line only:
// return $this->loader->loadChoiceList($this->value)->getStructuredValues();
}
/**
* {@inheritdoc}
*/
public function getOriginalKeys()
{
if ($this->loaded) {
// Check whether the loader has the same cache
if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
@trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
}
return $this->loadedList->getOriginalKeys();
}
// BC
$this->loadedList = $this->loader->loadChoiceList($this->value);
$this->loaded = true;
return $this->loadedList->getOriginalKeys();
// In 4.0 keep the following line only:
// return $this->loader->loadChoiceList($this->value)->getOriginalKeys();
}
/**
* {@inheritdoc}
*/
public function getChoicesForValues(array $values)
{
if ($this->loaded) {
// Check whether the loader has the same cache
if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
@trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
}
return $this->loadedList->getChoicesForValues($values);
}
return $this->loader->loadChoicesForValues($values, $this->value);
}
/**
* {@inheritdoc}
*/
public function getValuesForChoices(array $choices)
{
if ($this->loaded) {
// Check whether the loader has the same cache
if ($this->loadedList !== $this->loader->loadChoiceList($this->value)) {
@trigger_error(sprintf('Caching the choice list in %s is deprecated since 3.1 and will not happen in 4.0. Cache the list in the %s instead.', __CLASS__, ChoiceLoaderInterface::class), E_USER_DEPRECATED);
}
return $this->loadedList->getValuesForChoices($choices);
}
return $this->loader->loadValuesForChoices($choices, $this->value);
}
}
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