org.apache.tinkerpop.gremlin.tinkergraph.structure

Class TinkerGraph

java.lang.Object

org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph

All Implemented Interfaces:

AutoCloseable, Graph

public class TinkerGraph
extends Object
implements Graph

An in-sideEffects, reference implementation of the property graph interfaces provided by Gremlin3.

Author:

Marko A. Rodriguez (http://markorodriguez.com), Stephen Mallette (http://stephen.genoprime.com)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TinkerGraph.TinkerGraphEdgeFeatures
static class	TinkerGraph.TinkerGraphFeatures
static class	TinkerGraph.TinkerGraphGraphFeatures
static class	TinkerGraph.TinkerGraphVertexFeatures

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.structure.Graph

Graph.Exceptions, Graph.Features, Graph.Helper, Graph.Hidden, Graph.Io, Graph.OptIn, Graph.OptIns, Graph.OptOut, Graph.OptOuts, Graph.Variables

Field Summary

Fields

Modifier and Type	Field and Description
protected Long	currentId
protected org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIndex<TinkerEdge>	edgeIndex
protected Map<Object,Edge>	edges
protected TinkerGraphView	graphView
protected TinkerGraphVariables	variables
protected org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIndex<TinkerVertex>	vertexIndex
protected Map<Object,Vertex>	vertices

Fields inherited from interface org.apache.tinkerpop.gremlin.structure.Graph

GRAPH

Method Summary

Modifier and Type	Method and Description
Vertex	addVertex(Object... keyValues) Add a Vertex to the graph given an optional series of key/value pairs.
void	clear()
void	close()
GraphComputer	compute()
<C extends GraphComputer> C	compute(Class<C> graphComputerClass) Declare the GraphComputer to use for OLAP operations on the graph.
Configuration	configuration() Get the org.apache.commons.configuration.Configuration associated with the construction of this graph.
<E extends Element> void	createIndex(String key, Class<E> elementClass) Create an index for said element class (Vertex or Edge) and said property key.
<E extends Element> void	dropIndex(String key, Class<E> elementClass) Drop the index for the specified element class (Vertex or Edge) and key.
Iterator<Edge>	edges(Object... edgeIds) Get the Edge objects in this graph with the provided edge ids.
static TinkerGraph	empty()
Graph.Features	features() Return TinkerGraph feature set.
<E extends Element> Set<String>	getIndexedKeys(Class<E> elementClass) Return all the keys currently being index for said element class (Vertex or Edge).
static TinkerGraph	open() Open a new TinkerGraph instance.
static TinkerGraph	open(Configuration configuration) Open a new TinkerGraph instance.
String	toString()
Transaction	tx() Configure and control the transactions for those graphs that support this feature.
Graph.Variables	variables() A collection of global Graph.Variables associated with the graph.
Iterator<Vertex>	vertices(Object... vertexIds) Get the Vertex objects in this graph with the provided vertex ids.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tinkerpop.gremlin.structure.Graph

addVertex, empty, io, traversal, traversal

Field Detail

currentId

protected Long currentId

vertices

protected Map<Object,Vertex> vertices

edges

protected Map<Object,Edge> edges

variables

protected TinkerGraphVariables variables

graphView

protected TinkerGraphView graphView

vertexIndex

protected org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIndex<TinkerVertex> vertexIndex

edgeIndex

protected org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIndex<TinkerEdge> edgeIndex

Method Detail

empty

public static TinkerGraph empty()

open

public static TinkerGraph open()

Open a new TinkerGraph instance.

Reference Implementation Help: If a Graph implementation does not require a org.apache.commons.configuration.Configuration (or perhaps has a default configuration) it can choose to implement a zero argument open() method. This is an optional constructor method for TinkerGraph. It is not enforced by the Gremlin Test Suite.

open

public static TinkerGraph open(Configuration configuration)

Open a new TinkerGraph instance.

Reference Implementation Help: This method is the one use by the GraphFactory to instantiate Graph instances. This method must be overridden for the Structure Test Suite to pass. Implementers have latitude in terms of how exceptions are handled within this method. Such exceptions will be considered implementation specific by the test suite as all test generate graph instances by way of GraphFactory. As such, the exceptions get generalized behind that facade and since GraphFactory is the preferred method to opening graphs it will be consistent at that level.

Parameters:

configuration - the configuration for the instance

Returns:

a newly opened Graph

addVertex

public Vertex addVertex(Object... keyValues)

Description copied from interface: Graph

Add a Vertex to the graph given an optional series of 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:

addVertex in interface Graph

Parameters:

keyValues - The key/value pairs to turn into vertex properties

Returns:

The newly created vertex

compute

public <C extends GraphComputer> C compute(Class<C> graphComputerClass)

Description copied from interface: Graph

Declare the GraphComputer to use for OLAP operations on the graph. If the graph does not support graph computer then an UnsupportedOperationException is thrown.

Specified by:

compute in interface Graph

Parameters:

graphComputerClass - The graph computer class to use.

Returns:

A graph computer for processing this graph

compute

public GraphComputer compute()

Specified by:

compute in interface Graph

variables

public Graph.Variables variables()

Description copied from interface: Graph

A collection of global Graph.Variables associated with the graph. Variables are used for storing metadata about the graph.

Specified by:

variables in interface Graph

Returns:

The variables associated with this graph

toString

public String toString()

Overrides:

toString in class Object

clear

public void clear()

close

public void close()

Specified by:

close in interface AutoCloseable

tx

public Transaction tx()

Description copied from interface: Graph

Configure and control the transactions for those graphs that support this feature.

Specified by:

tx in interface Graph

configuration

public Configuration configuration()

Description copied from interface: Graph

Get the org.apache.commons.configuration.Configuration associated with the construction of this graph. Whatever configuration was passed to org.apache.tinkerpop.gremlin.structure.util.GraphFactory#open(org.apache.commons.configuration.Configuration) is what should be returned by this method.

Specified by:

configuration in interface Graph

Returns:

the configuration used during graph construction.

vertices

public Iterator<Vertex> vertices(Object... vertexIds)

Description copied from interface: Graph

Get the Vertex objects in this graph with the provided vertex ids. If no ids are provided, get all vertices.

Specified by:

vertices in interface Graph

Parameters:

vertexIds - the ids of the vertices to get

Returns:

an Iterator of vertices that match the provided vertex ids

edges

public Iterator<Edge> edges(Object... edgeIds)

Description copied from interface: Graph

Get the Edge objects in this graph with the provided edge ids. If no ids are provided, get all edges.

Specified by:

edges in interface Graph

Parameters:

edgeIds - the ids of the edges to get

Returns:

an Iterator of edges that match the provided edge ids

features

public Graph.Features features()

Return TinkerGraph feature set.

Reference Implementation Help: Implementers only need to implement features for which there are negative or instance configured features. By default, all Features return true.

Specified by:

features in interface Graph

createIndex

public <E extends Element> void createIndex(String key,
                                            Class<E> elementClass)

Create an index for said element class (Vertex or Edge) and said property key. Whenever an element has the specified key mutated, the index is updated. When the index is created, all existing elements are indexed to ensure that they are captured by the index.

Type Parameters:

E - The type of the element class

Parameters:

key - the property key to index

elementClass - the element class to index

dropIndex

public <E extends Element> void dropIndex(String key,
                                          Class<E> elementClass)

Drop the index for the specified element class (Vertex or Edge) and key.

Type Parameters:

E - The type of the element class

Parameters:

key - the property key to stop indexing

elementClass - the element class of the index to drop

getIndexedKeys

public <E extends Element> Set<String> getIndexedKeys(Class<E> elementClass)

Return all the keys currently being index for said element class (Vertex or Edge).

Type Parameters:

E - The type of the element class

Parameters:

elementClass - the element class to get the indexed keys for

Returns:

the set of keys currently being indexed