Package org.apache.lucene.queries.function.valuesource

# Class MultiValuedDoubleFieldSource

java.lang.Object
org.apache.lucene.queries.function.ValueSource
org.apache.lucene.queries.function.valuesource.FieldCacheSource
org.apache.lucene.queries.function.valuesource.DoubleFieldSource
org.apache.lucene.queries.function.valuesource.MultiValuedDoubleFieldSource

public class MultiValuedDoubleFieldSource extends DoubleFieldSource
Obtains double field values from `LeafReader.getSortedNumericDocValues(java.lang.String)` and using a `SortedNumericSelector` it gives a single-valued ValueSource view of a field.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected final SortedNumericSelector.Type`
  `selector`

  ### Fields inherited from class org.apache.lucene.queries.function.valuesource.FieldCacheSource

  `field`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `MultiValuedDoubleFieldSource(String field, SortedNumericSelector.Type selector)`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `String`
  `description()`
  description of field, used in explain()
  `boolean`
  `equals(Object o)`
  `protected NumericDocValues`
  `getNumericDocValues(Map<Object,Object> context, LeafReaderContext readerContext)`
  `SortField`
  `getSortField(boolean reverse)`
  EXPERIMENTAL: This method is subject to change.
  `int`
  `hashCode()`

  ### Methods inherited from class org.apache.lucene.queries.function.valuesource.DoubleFieldSource

  `getValues`

  ### Methods inherited from class org.apache.lucene.queries.function.valuesource.FieldCacheSource

  `getField`

  ### Methods inherited from class org.apache.lucene.queries.function.ValueSource

  `asDoubleValuesSource, asLongValuesSource, createWeight, fromDoubleValuesSource, newContext, toString`

  ### Methods inherited from class java.lang.Object

  `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- ## Field Details

  - ### selector

    protected final SortedNumericSelector.Type selector

- ## Constructor Details

  - ### MultiValuedDoubleFieldSource

    public MultiValuedDoubleFieldSource(String field, SortedNumericSelector.Type selector)

- ## Method Details

  - ### getSortField

    public SortField getSortField(boolean reverse)
    Description copied from class: `ValueSource`
    EXPERIMENTAL: This method is subject to change.

    Get the SortField for this ValueSource. Uses the `ValueSource.getValues(java.util.Map, org.apache.lucene.index.LeafReaderContext)` to populate the SortField.

    Overrides:
      `getSortField` in class `DoubleFieldSource`
    Parameters:
      `reverse` - true if this is a reverse sort.
    Returns:
      The `SortField` for the ValueSource

  - ### description

    public String description()
    Description copied from class: `ValueSource`
    description of field, used in explain()
    Overrides:
      `description` in class `DoubleFieldSource`

  - ### getNumericDocValues

    protected NumericDocValues getNumericDocValues(Map<Object,Object> context, LeafReaderContext readerContext) throws IOException
    Overrides:
      `getNumericDocValues` in class `DoubleFieldSource`
    Throws:
      `IOException`

  - ### equals

    public boolean equals(Object o)
    Overrides:
      `equals` in class `DoubleFieldSource`

  - ### hashCode

    public int hashCode()
    Overrides:
      `hashCode` in class `DoubleFieldSource`