LongSet (Solr 9.0.0 core API)

java.lang.Object
- org.apache.solr.util.LongSet

```
public class LongSet
extends Object
```
Collects long values in a hash set (closed hashing on power-of-two sized long[])

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Constructor Summary

Constructors
Constructor Description

LongSet(int sz)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`add(long val)`	Adds an additional value to the set, returns true if the set did not already contain the value.
`int`	`cardinality()`	The number of values in the set
`boolean`	`containsZero()`
`long[]`	`getBackingArray()`	Returns the long[] array that has entries filled in with values or "0" for empty.
`LongIterator`	`iterator()`	Returns an iterator over the values in the set.

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

- Constructor Detail
  - LongSet
```
public LongSet(int sz)
```
- Method Detail
  - getBackingArray
```
public long[] getBackingArray()
```
    Returns the long[] array that has entries filled in with values or "0" for empty. To see if "0" itself is in the set, call containsZero()
  - containsZero
```
public boolean containsZero()
```
  - add
```
public boolean add(long val)
```
    Adds an additional value to the set, returns true if the set did not already contain the value.
  - cardinality
```
public int cardinality()
```
    The number of values in the set
  - iterator
```
public LongIterator iterator()
```
    Returns an iterator over the values in the set.