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<?php
declare(strict_types=1);
namespace OpenTelemetry\SDK\Common\Attribute;
class AttributeValidator implements AttributeValidatorInterface
{
private const PRIMITIVES = [
'string',
'integer',
'double',
'boolean',
];
private const NUMERICS = [
'double',
'integer',
];
/**
* Validate whether a value is a primitive, or a homogeneous array of primitives (treating int/double as equivalent).
* @see https://github.com/open-telemetry/opentelemetry-specification/blob/v1.21.0/specification/common/README.md#attribute
*/
public function validate($value): bool
{
if (is_array($value)) {
return $this->validateArray($value);
}
return in_array(gettype($value), self::PRIMITIVES);
}
private function validateArray(array $value): bool
{
if ($value === []) {
return true;
}
$type = gettype(reset($value));
if (!in_array($type, self::PRIMITIVES)) {
return false;
}
foreach ($value as $v) {
if (in_array(gettype($v), self::NUMERICS) && in_array($type, self::NUMERICS)) {
continue;
}
if (gettype($v) !== $type) {
return false;
}
}
return true;
}
public function getInvalidMessage(): string
{
return 'attribute with non-primitive or non-homogeneous array of primitives dropped';
}
}
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