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

# Class FieldCacheSource

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

Direct Known Subclasses:
  `BytesRefFieldSource`, `DoubleFieldSource`, `EnumFieldSource`, `FloatFieldSource`, `IntFieldSource`, `JoinDocFreqValueSource`, `LongFieldSource`, `SortedSetFieldSource`

public abstract class FieldCacheSource extends ValueSource
A base class for ValueSource implementations that retrieve values for a single field from DocValues.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `protected final String`
  `field`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `FieldCacheSource(String field)`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `String`
  `description()`
  description of field, used in explain()
  `boolean`
  `equals(Object o)`
  `String`
  `getField()`
  `int`
  `hashCode()`

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

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

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

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

- ## Field Details

  - ### field

    protected final String field

- ## Constructor Details

  - ### FieldCacheSource

    public FieldCacheSource(String field)

- ## Method Details

  - ### getField

    public String getField()

  - ### description

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

  - ### equals

    public boolean equals(Object o)
    Specified by:
      `equals` in class `ValueSource`

  - ### hashCode

    public int hashCode()
    Specified by:
      `hashCode` in class `ValueSource`