TransformTopN (Apache Jena ARQ)

java.lang.Object
- org.apache.jena.sparql.algebra.TransformCopy
- - org.apache.jena.sparql.algebra.optimize.TransformTopN

All Implemented Interfaces:

Transform
```
public class TransformTopN
extends TransformCopy
```
Optimization that changes queries that uses OFFSET/LIMIT and ORDER BY to execute using Top N: i.e. while executing, keep only the top N items seen. This avoids full sort of the whole results, saving space and time.

- Field Summary
  - Fields inherited from class org.apache.jena.sparql.algebra.TransformCopy
    COPY_ALWAYS, COPY_ONLY_ON_CHANGE
- Constructor Summary
  
  Constructors
  Constructor Description
  
  TransformTopN()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  Op transform(OpSlice opSlice, Op inSubOp)
  - Methods inherited from class org.apache.jena.sparql.algebra.TransformCopy
    transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform, transform
  - Methods inherited from class java.lang.Object
    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - TransformTopN
```
public TransformTopN()
```
- Method Detail
  - transform
```
public Op transform(OpSlice opSlice,
                    Op inSubOp)
```
    Specified by:
    
    transform in interface Transform
    
    Overrides:
    
    transform in class TransformCopy