VertexProperty (Apache TinkerPop 3.6.2 API)

All Superinterfaces:

Element, Property<V>

All Known Implementing Classes:

ComputerGraph.ComputerVertexProperty, DetachedVertexProperty, EmptyVertexProperty, KeyedVertexProperty, ReferenceVertexProperty, StarGraph.StarVertexProperty, TinkerVertexProperty
```
public interface VertexProperty<V>
extends Property<V>, Element
```
A VertexProperty is similar to a Property in that it denotes a key/value pair associated with an Vertex, however it is different in the sense that it also represents an entity that it is an Element that can have properties of its own.
A property is much like a Java8 Optional in that a property can be not present (i.e. empty). The key of a property is always a String and the value of a property is an arbitrary Java object. Each underlying graph engine will typically have constraints on what Java objects are allowed to be used as values.

Author:

Matthias Broecheler (me@matthiasb.com), Marko A. Rodriguez (http://markorodriguez.com), Stephen Mallette (http://stephen.genoprime.com)

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class VertexProperty.Cardinality

static class VertexProperty.Exceptions
Common exceptions to use with a property.

Field Summary

Fields
Modifier and Type Field Description

static String DEFAULT_LABEL

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`Vertex`	`element()`	Gets the `Vertex` that owns this `VertexProperty`.
`static <V> VertexProperty<V>`	`empty()`	Constructs an empty `VertexProperty`.
`default Graph`	`graph()`	Get the graph that this element is within.
`default String`	`label()`	Gets the label for the graph `Element` which helps categorize it.
`<U> Iterator<Property<U>>`	`properties(String... propertyKeys)`	Get an `Iterator` of properties where the `propertyKeys` is meant to be a filter on the available keys.

Methods inherited from interface org.apache.tinkerpop.gremlin.structure.Element
id, keys, property, property, remove, value, values

Methods inherited from interface org.apache.tinkerpop.gremlin.structure.Property
ifPresent, isPresent, key, orElse, orElseGet, orElseThrow, remove, value

- Field Detail
  - DEFAULT_LABEL
```
static final String DEFAULT_LABEL
```
    See Also:
    
    Constant Field Values
- Method Detail
  - element
```
Vertex element()
```
    Gets the Vertex that owns this VertexProperty.
    
    Specified by:
    
    element in interface Property<V>
    
    Returns:
    
    The element associated with this property (i.e. Vertex, Edge, or VertexProperty).
  - graph
```
default Graph graph()
```
    Get the graph that this element is within.
    
    Specified by:
    
    graph in interface Element
    
    Returns:
    
    the graph of this element
  - label
```
default String label()
```
    Gets the label for the graph Element which helps categorize it.
    
    Specified by:
    
    label in interface Element
    
    Returns:
    
    The label of the element
  - empty
```
static <V> VertexProperty<V> empty()
```
    Constructs an empty VertexProperty.
    
    Type Parameters:
    
    V - The value class of the empty property
    
    Returns:
    
    A property that is not present
  - properties
```
<U> Iterator<Property<U>> properties(String... propertyKeys)
```
    Get an Iterator of properties where the propertyKeys is meant to be a filter on the available keys. If no keys are provide then return all the properties.
    
    Specified by:
    
    properties in interface Element