VertexStepContract (Apache TinkerPop 3.8.0-SNAPSHOT API)

All Superinterfaces:

AutoCloseable, Cloneable, Iterator<Traverser.Admin<E>>, Serializable, Step<Vertex,E>

All Known Implementing Classes:

VertexStep, VertexStepPlaceholder
```
public interface VertexStepContract<E extends Element>
extends Step<Vertex,E>, AutoCloseable
```

Field Summary

Fields
Modifier and Type Field Description

static List<Class<? extends Step>> CONCRETE_STEPS
Concrete implementations of this contract that can be referenced as TinkerPop implementations.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`Direction`	`getDirection()`
`String[]`	`getEdgeLabels()`
`default GValue<String>[]`	`getEdgeLabelsAsGValues()`
`Set<TraverserRequirement>`	`getRequirements()`	Provide the necessary `TraverserRequirement` that must be met by the traverser in order for the step to function properly.
`Class<E>`	`getReturnClass()`
`boolean`	`returnsEdge()`
`boolean`	`returnsVertex()`
`void`	`reverseDirection()`

Methods inherited from interface java.lang.AutoCloseable
close

Methods inherited from interface java.util.Iterator
forEachRemaining, hasNext, next, remove

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.Step
addLabel, addStart, addStarts, clearLabels, clone, equals, getId, getLabels, getNextStep, getPreviousStep, getTraversal, hasStarts, removeLabel, reset, setId, setNextStep, setPreviousStep, setTraversal

- Field Detail
  - CONCRETE_STEPS
```
static final List<Class<? extends Step>> CONCRETE_STEPS
```
    Concrete implementations of this contract that can be referenced as TinkerPop implementations.
- Method Detail
  - getDirection
```
Direction getDirection()
```
  - getEdgeLabels
```
String[] getEdgeLabels()
```
  - getEdgeLabelsAsGValues
```
default GValue<String>[] getEdgeLabelsAsGValues()
```
  - getReturnClass
```
Class<E> getReturnClass()
```
  - reverseDirection
```
void reverseDirection()
```
  - returnsVertex
```
boolean returnsVertex()
```
  - returnsEdge
```
boolean returnsEdge()
```
  - getRequirements
```
Set<TraverserRequirement> getRequirements()
```
    Description copied from interface: Step
    
    Provide the necessary TraverserRequirement that must be met by the traverser in order for the step to function properly. The provided default implements returns an empty set.
    
    Specified by:
    
    getRequirements in interface Step<Vertex,E extends Element>
    
    Returns:
    
    the set of requirements