AggregationInterface.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\SDK\Metrics;

use OpenTelemetry\Context\ContextInterface;
use OpenTelemetry\SDK\Common\Attribute\AttributesInterface;
use OpenTelemetry\SDK\Metrics\Data\DataInterface;
use OpenTelemetry\SDK\Metrics\Data\Exemplar;
use OpenTelemetry\SDK\Metrics\Data\Temporality;

/**
 * @psalm-template T
 */
interface AggregationInterface {
    
    /**
     * @psalm-return T
     */
    public function initialize();
    
    /**
     * @psalm-param T $summary
     * @psalm-param float|int $value
     */
    public function record($summary, $value, AttributesInterface $attributes, ContextInterface $context, int $timestamp) : void;
    
    /**
     * @psalm-param T $left
     * @psalm-param T $right
     * @psalm-return T
     */
    public function merge($left, $right);
    
    /**
     * @psalm-param T $left
     * @psalm-param T $right
     * @psalm-return T
     */
    public function diff($left, $right);
    
    /**
     * @param array<AttributesInterface> $attributes
     * @psalm-param array<T> $summaries
     * @param array<list<Exemplar>> $exemplars
     * @param string|Temporality $temporality
     */
    public function toData(array $attributes, array $summaries, array $exemplars, int $startTimestamp, int $timestamp, $temporality) : DataInterface;

}