LocalBarrier (Apache TinkerPop 3.8.0-SNAPSHOT API)

All Superinterfaces:

Barrier<TraverserSet<S>>, MemoryComputing<TraverserSet<S>>

All Known Implementing Classes:

AggregateGlobalStep, NoOpBarrierStep
```
public interface LocalBarrier<S>
extends Barrier<TraverserSet<S>>
```
Author:

Marko A. Rodriguez (http://markorodriguez.com)

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default TraverserSet<S>`	`getEmptyBarrier()`	If a barrier is unproductive then provide an empty object suitable to the implementation which can be used to represent that state.
`default MemoryComputeKey`	`getMemoryComputeKey()`	The `MemoryComputeKey` that will be used by this step.

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.step.Barrier
addBarrier, done, hasNextBarrier, nextBarrier, processAllStarts

- Method Detail
  - getMemoryComputeKey
```
default MemoryComputeKey getMemoryComputeKey()
```
    Description copied from interface: MemoryComputing
    
    The MemoryComputeKey that will be used by this step.
    
    Specified by:
    
    getMemoryComputeKey in interface MemoryComputing<S>
    
    Returns:
    
    the MemoryComputeKey to use
  - getEmptyBarrier
```
default TraverserSet<S> getEmptyBarrier()
```
    Description copied from interface: Barrier
    
    If a barrier is unproductive then provide an empty object suitable to the implementation which can be used to represent that state. This is important for cases like by(out().order().fold()) where the order() might filter but the fold() means the traversal is productive.
    
    Specified by:
    
    getEmptyBarrier in interface Barrier<S>