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<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Common\Configuration\Resolver;
use OpenTelemetry\SDK\Common\Configuration\Configuration;
/**
* @interal
*/
class CompositeResolver
{
// @var array<ResolverInterface>
private array $resolvers = [];
public static function instance(): self
{
static $instance;
$instance ??= new self([
new PhpIniResolver(),
new EnvironmentResolver(),
]);
return $instance;
}
public function __construct($resolvers)
{
foreach ($resolvers as $resolver) {
$this->addResolver($resolver);
}
}
public function addResolver(ResolverInterface $resolver): void
{
$this->resolvers[] = $resolver;
}
public function getResolvers(): array
{
return $this->resolvers;
}
public function resolve(string $variableName, $default = '')
{
foreach ($this->resolvers as $resolver) {
if ($resolver->hasVariable($variableName)) {
return $resolver->retrieveValue($variableName);
}
}
return Configuration::isEmpty($default)
? Configuration::getDefault($variableName)
: $default;
}
public function hasVariable(string $variableName): bool
{
foreach ($this->resolvers as $resolver) {
if ($resolver->hasVariable($variableName)) {
return true;
}
}
return false;
}
}
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