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LazyProps.php
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LazyProps.php
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<?php
namespace Neos\Fusion\FusionObjects\Helpers;
use Neos\Flow\Annotations as Flow;
use Neos\Fusion\Core\Runtime;
/**
* @Flow\Proxy(false)
*/
final class LazyProps implements \ArrayAccess, \Iterator
{
/**
* @var array
*/
private $valueCache = [];
/**
* @var string
*/
private $parentPath;
/**
* @var Runtime
*/
private $runtime;
/**
* Index of keys
*
* @var array
*/
private $keys;
/**
* @var object
*/
private $fusionObject;
/**
* @var array
*/
private $effectiveContext;
public function __construct(
object $fusionObject,
string $parentPath,
Runtime $runtime,
array $keys,
array $effectiveContext
) {
$this->fusionObject = $fusionObject;
$this->parentPath = $parentPath;
$this->runtime = $runtime;
$this->keys = array_flip($keys);
$this->effectiveContext = $effectiveContext;
}
public function offsetExists($path)
{
return isset($this->keys[$path]);
}
public function offsetGet($path)
{
if (!isset($this->valueCache[$path])) {
$this->runtime->pushContextArray($this->effectiveContext);
try {
$this->valueCache[$path] = $this->runtime->evaluate($this->parentPath . '/' . $path,
$this->fusionObject);
} finally {
$this->runtime->popContext();
}
}
return $this->valueCache[$path];
}
public function offsetSet($path, $value)
{
// NOOP
}
public function offsetUnset($path)
{
// NOOP
}
public function current()
{
$path = key($this->keys);
if ($path === null) {
return null;
}
return $this->offsetGet($path);
}
public function next()
{
next($this->keys);
}
public function key()
{
return key($this->keys);
}
public function valid()
{
return current($this->keys) !== false;
}
public function rewind()
{
reset($this->keys);
}
}