com.tinkerpop.blueprints.util

Class IndexableGraphHelper

java.lang.Object

com.tinkerpop.blueprints.util.IndexableGraphHelper

public class IndexableGraphHelper
extends Object

Author:

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

Constructor Summary

Constructors

Constructor and Description
IndexableGraphHelper()

Method Summary

Methods

Modifier and Type	Method and Description
static Vertex	addUniqueVertex(IndexableGraph graph, Object id, Index<Vertex> index, String uniqueKey, Object uniqueValue) Add a vertex to a graph only if no other vertex in the provided Index is indexed by the property key/value pair.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IndexableGraphHelper

public IndexableGraphHelper()

Method Detail

addUniqueVertex

public static Vertex addUniqueVertex(IndexableGraph graph,
                     Object id,
                     Index<Vertex> index,
                     String uniqueKey,
                     Object uniqueValue)

Add a vertex to a graph only if no other vertex in the provided Index is indexed by the property key/value pair. If a vertex already exists with that key/value pair, return the pre-existing vertex.

Parameters:

graph - the graph to add the vertex to

id - the id of the vertex to create (can be null)

index - the index to determine if another vertex with the same key/value exists

uniqueKey - the key to check on for uniqueness of the vertex

uniqueValue - the value to check on for uniqueness of the vertex

Returns:

the newly created vertex or the vertex that satisfies the uniqueness criteria