DoubleValues (Lucene 9.10.0 core API)

java.lang.Object
- org.apache.lucene.search.DoubleValues

```
public abstract class DoubleValues
extends Object
```
Per-segment, per-document double values, which can be calculated at search-time

Field Summary

Fields
Modifier and Type Field Description

static DoubleValues EMPTY
An empty DoubleValues instance that always returns false from advanceExact(int)

Constructor Summary

Constructors
Constructor Description

DoubleValues()

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract boolean`	`advanceExact(int doc)`	Advance this instance to the given document id
`abstract double`	`doubleValue()`	Get the double value for the current document
`static DoubleValues`	`withDefault(DoubleValues in, double missingValue)`	Wrap a DoubleValues instance, returning a default if the wrapped instance has no value

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - EMPTY
```
public static final DoubleValues EMPTY
```
    An empty DoubleValues instance that always returns false from advanceExact(int)
- Constructor Detail
  - DoubleValues
```
public DoubleValues()
```
- Method Detail
  - doubleValue
```
public abstract double doubleValue()
                            throws IOException
```
    Get the double value for the current document
    
    Throws:
    
    IOException
  - advanceExact
```
public abstract boolean advanceExact(int doc)
                              throws IOException
```
    Advance this instance to the given document id
    
    Returns:
    
    true if there is a value for this document
    
    Throws:
    
    IOException
  - withDefault
```
public static DoubleValues withDefault(DoubleValues in,
                                       double missingValue)
```
    Wrap a DoubleValues instance, returning a default if the wrapped instance has no value