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<?php |
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declare(strict_types=1); |
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namespace Level23\Druid\PostAggregations; |
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class HistogramPostAggregator implements PostAggregatorInterface |
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{ |
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protected string $outputName; |
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protected PostAggregatorInterface $dimension; |
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/** |
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* @var array<float>|null |
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*/ |
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protected ?array $splitPoints = null; |
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protected ?int $numBins = null; |
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/** |
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* HistogramPostAggregator constructor. |
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* |
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* @param PostAggregatorInterface $dimension Post aggregator that refers to a DoublesSketch (fieldAccess or |
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* another post aggregator) |
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* @param string $outputName |
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* @param array<float>|null $splitPoints array of split points (optional) |
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* @param int|null $numBins number of bins (optional, defaults to 10) |
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*/ |
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public function __construct( |
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PostAggregatorInterface $dimension, |
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string $outputName, |
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?array $splitPoints = null, |
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?int $numBins = null |
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) { |
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$this->outputName = $outputName; |
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$this->dimension = $dimension; |
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$this->splitPoints = $splitPoints; |
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$this->numBins = $numBins; |
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} |
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/** |
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* Return the aggregator as it can be used in a druid query. |
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* |
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* @return array<string,string|float[]|array<string,string|array<mixed>>|int> |
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*/ |
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public function toArray(): array |
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{ |
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$result = [ |
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'type' => 'quantilesDoublesSketchToHistogram', |
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'name' => $this->outputName, |
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'field' => $this->dimension->toArray(), |
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]; |
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if ($this->splitPoints !== null) { |
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$result['splitPoints'] = $this->splitPoints; |
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} |
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if ($this->numBins !== null) { |
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$result['numBins'] = $this->numBins; |
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} |
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return $result; |
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} |
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} |
level23 /
druid-client
