Order (Jakarta Persistence API 3.0.1-SNAPSHOT API)

```
public interface Order
```
An object that defines an ordering over the query results.

Since:

2.0

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Expression<?>`	`getExpression()`	Return the expression that is used for ordering.
`boolean`	`isAscending()`	Whether ascending ordering is in effect.
`Order`	`nullsFirst()`	Set nulls to be positioned first in the ordering.
`Order`	`nullsLast()`	Set nulls to be positioned last in the ordering.
`Order`	`reverse()`	Switch the ordering.

- Method Detail
  - reverse
```
Order reverse()
```
    Switch the ordering.
    
    Returns:
    
    a new Order instance with the reversed ordering
  - isAscending
```
boolean isAscending()
```
    Whether ascending ordering is in effect.
    
    Returns:
    
    boolean indicating whether ordering is ascending
  - getExpression
```
Expression<?> getExpression()
```
    Return the expression that is used for ordering.
    
    Returns:
    
    expression used for ordering
  - nullsFirst
```
Order nullsFirst()
```
    Set nulls to be positioned first in the ordering. Note that this is a DataNucleus extension, post JPA2.1
    
    Returns:
    
    This instance
  - nullsLast
```
Order nullsLast()
```
    Set nulls to be positioned last in the ordering. Note that this is a DataNucleus extension, post JPA 2.1
    
    Returns:
    
    This instance