org.apache.tinkerpop.gremlin.structure.util.reference

## Class ReferenceVertex

- java.lang.Object
- - org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceElement<Vertex>
  - - org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceVertex

- All Implemented Interfaces:
    Serializable, Element, Attachable<Vertex>, Host, Vertex

      public class ReferenceVertex
      extends ReferenceElement<Vertex>
      implements Vertex

  Author:
    Marko A. Rodriguez (http://markorodriguez.com)
  See Also:
    Serialized Form

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.structure.Vertex

      `Vertex.Exceptions`

    - ### Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.structure.util.Attachable

      `Attachable.Exceptions, Attachable.Method`

  - ### Field Summary

    - ### Fields inherited from class org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceElement

      `id, label`

    - ### Fields inherited from interface org.apache.tinkerpop.gremlin.structure.Vertex

      `DEFAULT_LABEL, EMPTY_ARGS`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ReferenceVertex(Object id, String label)`
    `ReferenceVertex(Vertex vertex)`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Edge` | `addEdge(String label, Vertex inVertex, Object... keyValues)` Add an outgoing edge to the vertex with provided label and edge properties as key/value pairs.
    `Iterator<Edge>` | `edges(Direction direction, String... edgeLabels)` Gets an `Iterator` of incident edges.
    `<V> Iterator<VertexProperty<V>>` | `properties(String... propertyKeys)` Get an `Iterator` of properties where the `propertyKeys` is meant to be a filter on the available keys.
    `<V> VertexProperty<V>` | `property(String key, V value, Object... keyValues)` Set the provided key to the provided value using default `VertexProperty.Cardinality` for that key.
    `<V> VertexProperty<V>` | `property(VertexProperty.Cardinality cardinality, String key, V value, Object... keyValues)` Create a new vertex property.
    `void` | `remove()` Removes the `Element` from the graph.
    `String` | `toString()`
    `Iterator<Vertex>` | `vertices(Direction direction, String... edgeLabels)` Gets an `Iterator` of adjacent vertices.

    - ### Methods inherited from class org.apache.tinkerpop.gremlin.structure.util.reference.ReferenceElement

      `equals, get, graph, hashCode, id, label`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface org.apache.tinkerpop.gremlin.structure.Vertex

      `property, property`

    - ### Methods inherited from interface org.apache.tinkerpop.gremlin.structure.Element

      `graph, id, keys, label, value, values`

    - ### Methods inherited from interface org.apache.tinkerpop.gremlin.structure.util.Host

      `getHostingVertex`

    - ### Methods inherited from interface org.apache.tinkerpop.gremlin.structure.util.Attachable

      `attach`

- - ### Constructor Detail

    - #### ReferenceVertex

          public ReferenceVertex(Object id,
                                 String label)

    - #### ReferenceVertex

          public ReferenceVertex(Vertex vertex)

  - ### Method Detail

    - #### addEdge

          public Edge addEdge(String label,
                              Vertex inVertex,
                              Object... keyValues)

      Description copied from interface: `Vertex`
      Add an outgoing edge to the vertex with provided label and edge properties as key/value pairs. These key/values must be provided in an even number where the odd numbered arguments are `String` property keys and the even numbered arguments are the related property values.
      Specified by:
        `addEdge` in interface `Vertex`
      Parameters:
        `label` - The label of the edge
        `inVertex` - The vertex to receive an incoming edge from the current vertex
        `keyValues` - The key/value pairs to turn into edge properties
      Returns:
        the newly created edge

    - #### property

          public <V> VertexProperty<V> property(String key,
                                                V value,
                                                Object... keyValues)

      Description copied from interface: `Vertex`
      Set the provided key to the provided value using default `VertexProperty.Cardinality` for that key. The default cardinality can be vendor defined and is usually tied to the graph schema. The default implementation of this method determines the cardinality `graph().features().vertex().getCardinality(key)`. The provided key/values are the properties of the newly created `VertexProperty`. These key/values must be provided in an even number where the odd numbered arguments are `String`.
      Specified by:
        `property` in interface `Vertex`
      Type Parameters:
        `V` - the type of the value of the vertex property
      Parameters:
        `key` - the key of the vertex property
        `value` - The value of the vertex property
        `keyValues` - the key/value pairs to turn into vertex property properties
      Returns:
        the newly created vertex property

    - #### property

          public <V> VertexProperty<V> property(VertexProperty.Cardinality cardinality,
                                                String key,
                                                V value,
                                                Object... keyValues)

      Description copied from interface: `Vertex`
      Create a new vertex property. If the cardinality is `VertexProperty.Cardinality.single`, then set the key to the value. If the cardinality is `VertexProperty.Cardinality.list`, then add a new value to the key. If the cardinality is `VertexProperty.Cardinality.set`, then only add a new value if that value doesn't already exist for the key. If the value already exists for the key, add the provided key value vertex property properties to it.
      Specified by:
        `property` in interface `Vertex`
      Type Parameters:
        `V` - the type of the value of the vertex property
      Parameters:
        `cardinality` - the desired cardinality of the property key
        `key` - the key of the vertex property
        `value` - The value of the vertex property
        `keyValues` - the key/value pairs to turn into vertex property properties
      Returns:
        the newly created vertex property

    - #### edges

          public Iterator<Edge> edges(Direction direction,
                                      String... edgeLabels)

      Description copied from interface: `Vertex`
      Gets an `Iterator` of incident edges.
      Specified by:
        `edges` in interface `Vertex`
      Parameters:
        `direction` - The incident direction of the edges to retrieve off this vertex
        `edgeLabels` - The labels of the edges to retrieve. If no labels are provided, then get all edges.
      Returns:
        An iterator of edges meeting the provided specification

    - #### vertices

          public Iterator<Vertex> vertices(Direction direction,
                                           String... edgeLabels)

      Description copied from interface: `Vertex`
      Gets an `Iterator` of adjacent vertices.
      Specified by:
        `vertices` in interface `Vertex`
      Parameters:
        `direction` - The adjacency direction of the vertices to retrieve off this vertex
        `edgeLabels` - The labels of the edges associated with the vertices to retrieve. If no labels are provided, then get all edges.
      Returns:
        An iterator of vertices meeting the provided specification

    - #### properties

          public <V> Iterator<VertexProperty<V>> properties(String... propertyKeys)

      Description copied from interface: `Vertex`
      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`
      Specified by:
        `properties` in interface `Vertex`

    - #### remove

          public void remove()

      Description copied from interface: `Element`
      Removes the `Element` from the graph.
      Specified by:
        `remove` in interface `Element`

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`

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