Package org.apache.lucene.misc.search

Class DocValuesStats.DoubleDocValuesStats

java.lang.Object

org.apache.lucene.misc.search.DocValuesStats<Double>

org.apache.lucene.misc.search.DocValuesStats.NumericDocValuesStats<Double>

org.apache.lucene.misc.search.DocValuesStats.DoubleDocValuesStats

Enclosing class:

DocValuesStats<T>

public static final class DocValuesStats.DoubleDocValuesStats
extends DocValuesStats.NumericDocValuesStats<Double>

Holds DocValues statistics for a numeric field storing double values.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.misc.search.DocValuesStats

DocValuesStats.DoubleDocValuesStats, DocValuesStats.LongDocValuesStats, DocValuesStats.NumericDocValuesStats<T extends Number>, DocValuesStats.SortedDocValuesStats, DocValuesStats.SortedDoubleDocValuesStats, DocValuesStats.SortedLongDocValuesStats, DocValuesStats.SortedNumericDocValuesStats<T extends Number>, DocValuesStats.SortedSetDocValuesStats

Field Summary

Fields inherited from class org.apache.lucene.misc.search.DocValuesStats.NumericDocValuesStats

mean, ndv, variance

Fields inherited from class org.apache.lucene.misc.search.DocValuesStats

count, field, max, min, missing

Constructor Summary

Constructors

Constructor	Description
DoubleDocValuesStats(String field)

Method Summary

Modifier and Type	Method	Description
protected void	doAccumulate(int count)	Called after DocValuesStats.accumulate(int) was processed and verified that the document has a value for the field.
protected void	merge(DocValuesStats<Double> other)	Merges the statistics from other into this instance.
Double	sum()	Returns the sum of values of the field.

Methods inherited from class org.apache.lucene.misc.search.DocValuesStats.NumericDocValuesStats

hasValue, init, mean, stdev, variance

Methods inherited from class org.apache.lucene.misc.search.DocValuesStats

count, field, max, min, missing

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

DoubleDocValuesStats

public DoubleDocValuesStats(String field)

Method Details

doAccumulate

protected void doAccumulate(int count)
                     throws IOException

Description copied from class: DocValuesStats

Called after DocValuesStats.accumulate(int) was processed and verified that the document has a value for the field. Implementations should update the statistics based on the value of the current document.

Specified by:

doAccumulate in class DocValuesStats<Double>

Parameters:

count - the updated number of documents with value for this field.

Throws:

IOException

sum

public Double sum()

Description copied from class: DocValuesStats.NumericDocValuesStats

Returns the sum of values of the field. Note that if the values are large, the sum might overflow.

Specified by:

sum in class DocValuesStats.NumericDocValuesStats<Double>

merge

protected void merge(DocValuesStats<Double> other)

Description copied from class: DocValuesStats

Merges the statistics from other into this instance. After the call, this instance reflects the combined statistics of both segments as if they had been collected together. Subclasses that track additional statistics (e.g. mean, variance, sum) must override this method, call super.merge(other), and combine their own fields accordingly.

Overrides:

merge in class DocValuesStats.NumericDocValuesStats<Double>

Parameters:

other - the stats instance to merge into this one; must be of the same concrete type