<?php
/*
* This file is part of the Assetic package, an OpenSky project.
*
* (c) 2010-2013 OpenSky Project Inc
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Assetic\Extension\Twig;
use Assetic\ValueSupplierInterface;
/**
* Container for values initialized lazily from a ValueSupplierInterface.
*
* @author Christophe Coevoet <stof@notk.org>
*/
class ValueContainer implements \ArrayAccess, \IteratorAggregate, \Countable {
private $values;
private $valueSupplier;
public function __construct(ValueSupplierInterface $valueSupplier) {
$this->valueSupplier = $valueSupplier;
}
public function offsetExists($offset) {
$this
->initialize();
return array_key_exists($offset, $this->values);
}
public function offsetGet($offset) {
$this
->initialize();
if (!array_key_exists($offset, $this->values)) {
throw new \OutOfRangeException(sprintf('The variable "%s" does not exist.', $offset));
}
return $this->values[$offset];
}
public function offsetSet($offset, $value) {
throw new \BadMethodCallException('The ValueContainer is read-only.');
}
public function offsetUnset($offset) {
throw new \BadMethodCallException('The ValueContainer is read-only.');
}
public function getIterator() {
$this
->initialize();
return new \ArrayIterator($this->values);
}
public function count() {
$this
->initialize();
return count($this->values);
}
private function initialize() {
if (null === $this->values) {
$this->values = $this->valueSupplier
->getValues();
}
}
}
Name | Description |
---|---|
ValueContainer | Container for values initialized lazily from a ValueSupplierInterface. |