134 lines
3.3 KiB
PHP
134 lines
3.3 KiB
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
|
|
{
|
|
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
|
|
*/
|
|
private $loadedList;
|
|
|
|
/**
|
|
* 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, $value = null)
|
|
{
|
|
$this->loader = $loader;
|
|
$this->value = $value;
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function getChoices()
|
|
{
|
|
if (!$this->loadedList) {
|
|
$this->loadedList = $this->loader->loadChoiceList($this->value);
|
|
}
|
|
|
|
return $this->loadedList->getChoices();
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function getValues()
|
|
{
|
|
if (!$this->loadedList) {
|
|
$this->loadedList = $this->loader->loadChoiceList($this->value);
|
|
}
|
|
|
|
return $this->loadedList->getValues();
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function getStructuredValues()
|
|
{
|
|
if (!$this->loadedList) {
|
|
$this->loadedList = $this->loader->loadChoiceList($this->value);
|
|
}
|
|
|
|
return $this->loadedList->getStructuredValues();
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function getOriginalKeys()
|
|
{
|
|
if (!$this->loadedList) {
|
|
$this->loadedList = $this->loader->loadChoiceList($this->value);
|
|
}
|
|
|
|
return $this->loadedList->getOriginalKeys();
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function getChoicesForValues(array $values)
|
|
{
|
|
if (!$this->loadedList) {
|
|
return $this->loader->loadChoicesForValues($values, $this->value);
|
|
}
|
|
|
|
return $this->loadedList->getChoicesForValues($values);
|
|
}
|
|
|
|
/**
|
|
* {@inheritdoc}
|
|
*/
|
|
public function getValuesForChoices(array $choices)
|
|
{
|
|
if (!$this->loadedList) {
|
|
return $this->loader->loadValuesForChoices($choices, $this->value);
|
|
}
|
|
|
|
return $this->loadedList->getValuesForChoices($choices);
|
|
}
|
|
}
|