Constructor Detail

• MinAggregator

  public MinAggregator(String name,
                       long estimatedBucketsCount,
                       ValuesSource.Numeric valuesSource,
                       @Nullable
                       ValueFormatter formatter,
                       AggregationContext context,
                       Aggregator parent)

Method Detail

• shouldCollect

  public boolean shouldCollect()

  Specified by:

  shouldCollect in class  Aggregator

  Returns:

  Whether this aggregator is in the state where it can collect documents. Some aggregators can do their aggregations without actually collecting documents, for example, an aggregator that computes stats over unmapped fields doesn't need to collect anything as it knows to just return "empty" stats as the aggregation result.

• setNextReader

  public void setNextReader(org.apache.lucene.index.AtomicReaderContext reader)

• collect

  public void collect(int doc,
                      long owningBucketOrdinal)
               throws IOException

  Description copied from class: BucketCollector
  Called during the query phase, to collect & aggregate the given document.

  Specified by:

  collect in class  BucketCollector

  owningBucketOrdinal - The ordinal of the bucket this aggregator belongs to, assuming this aggregator is not a top level aggregator. Typically, aggregators with #bucketAggregationMode set to Aggregator.BucketAggregationMode.MULTI_BUCKETS will heavily depend on this ordinal. Other aggregators may or may not use it and can see this ordinal as just an extra information for the aggregation context. For top level aggregators, the ordinal will always be equal to 0.

  Throws:

  IOException -

• metric

  public double metric(long owningBucketOrd)

• buildAggregation

  public InternalAggregation buildAggregation(long owningBucketOrdinal)

  Specified by:

  buildAggregation in class  Aggregator

  Returns:

  The aggregated & built aggregation

• buildEmptyAggregation

  public InternalAggregation buildEmptyAggregation()

• doClose

  public void doClose()

  Description copied from class: Aggregator
  Release instance-specific data.