org.apache.tinkerpop.gremlin.tinkergraph.structure

Class TinkerGraph

java.lang.Object

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

All Implemented Interfaces:

AutoCloseable, Graph, Host

public final class TinkerGraph
extends Object
implements Graph

An in-memory (with optional persistence on calls to close()), reference implementation of the property graph interfaces provided by TinkerPop.

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.DefaultIdManager A default set of TinkerGraph.IdManager implementations for common identifier types.
static interface	TinkerGraph.IdManager<T> TinkerGraph will use an implementation of this interface to generate identifiers when a user does not supply them and to handle identifier conversions when querying to provide better flexibility with respect to handling different data types that mean the same thing.
class	TinkerGraph.TinkerGraphEdgeFeatures
class	TinkerGraph.TinkerGraphFeatures
class	TinkerGraph.TinkerGraphGraphFeatures
class	TinkerGraph.TinkerGraphVertexFeatures
class	TinkerGraph.TinkerGraphVertexPropertyFeatures

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

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

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	allowNullPropertyValues
protected AtomicLong	currentId
protected VertexProperty.Cardinality	defaultVertexPropertyCardinality
protected TinkerGraph.IdManager<?>	edgeIdManager
protected org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIndex<TinkerEdge>	edgeIndex
protected Map<Object,Edge>	edges
protected TinkerGraphComputerView	graphComputerView
static String	GREMLIN_TINKERGRAPH_ALLOW_NULL_PROPERTY_VALUES
static String	GREMLIN_TINKERGRAPH_DEFAULT_VERTEX_PROPERTY_CARDINALITY
static String	GREMLIN_TINKERGRAPH_EDGE_ID_MANAGER
static String	GREMLIN_TINKERGRAPH_GRAPH_FORMAT
static String	GREMLIN_TINKERGRAPH_GRAPH_LOCATION
static String	GREMLIN_TINKERGRAPH_VERTEX_ID_MANAGER
static String	GREMLIN_TINKERGRAPH_VERTEX_PROPERTY_ID_MANAGER
protected TinkerGraphVariables	variables
protected TinkerGraph.IdManager<?>	vertexIdManager
protected org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerIndex<TinkerVertex>	vertexIndex
protected TinkerGraph.IdManager<?>	vertexPropertyIdManager
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() This method only has an effect if the GREMLIN_TINKERGRAPH_GRAPH_LOCATION is set, in which case the data in the graph is persisted to that location.
GraphComputer	compute() Generate a GraphComputer using the default engine of the underlying graph system.
<C extends GraphComputer> C	compute(Class<C> graphComputerClass) Declare the GraphComputer to use for OLAP operations on the graph.
org.apache.commons.configuration2.Configuration	configuration() Get the 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 or Edge objects.
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).
<I extends Io> I	io(Io.Builder<I> builder) Construct a particular Io implementation for reading and writing the Graph and other data.
static TinkerGraph	open() Open a new TinkerGraph instance.
static TinkerGraph	open(org.apache.commons.configuration2.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 or Vertex objects themselves.

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, traversal, traversal, tx

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

getHostingVertex

Field Detail

GREMLIN_TINKERGRAPH_VERTEX_ID_MANAGER

public static final String GREMLIN_TINKERGRAPH_VERTEX_ID_MANAGER

See Also:

Constant Field Values

GREMLIN_TINKERGRAPH_EDGE_ID_MANAGER

public static final String GREMLIN_TINKERGRAPH_EDGE_ID_MANAGER

See Also:

Constant Field Values

GREMLIN_TINKERGRAPH_VERTEX_PROPERTY_ID_MANAGER

public static final String GREMLIN_TINKERGRAPH_VERTEX_PROPERTY_ID_MANAGER

See Also:

Constant Field Values

GREMLIN_TINKERGRAPH_DEFAULT_VERTEX_PROPERTY_CARDINALITY

public static final String GREMLIN_TINKERGRAPH_DEFAULT_VERTEX_PROPERTY_CARDINALITY

See Also:

Constant Field Values

GREMLIN_TINKERGRAPH_GRAPH_LOCATION

public static final String GREMLIN_TINKERGRAPH_GRAPH_LOCATION

See Also:

Constant Field Values

GREMLIN_TINKERGRAPH_GRAPH_FORMAT

public static final String GREMLIN_TINKERGRAPH_GRAPH_FORMAT

See Also:

Constant Field Values

GREMLIN_TINKERGRAPH_ALLOW_NULL_PROPERTY_VALUES

public static final String GREMLIN_TINKERGRAPH_ALLOW_NULL_PROPERTY_VALUES

See Also:

Constant Field Values

currentId

protected AtomicLong currentId

vertices

protected Map<Object,Vertex> vertices

edges

protected Map<Object,Edge> edges

variables

protected TinkerGraphVariables variables

graphComputerView

protected TinkerGraphComputerView graphComputerView

vertexIndex

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

edgeIndex

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

vertexIdManager

protected final TinkerGraph.IdManager<?> vertexIdManager

edgeIdManager

protected final TinkerGraph.IdManager<?> edgeIdManager

vertexPropertyIdManager

protected final TinkerGraph.IdManager<?> vertexPropertyIdManager

defaultVertexPropertyCardinality

protected final VertexProperty.Cardinality defaultVertexPropertyCardinality

allowNullPropertyValues

protected final boolean allowNullPropertyValues

Method Detail

open

public static TinkerGraph open()

Open a new TinkerGraph instance.

Reference Implementation Help: If a Graph implementation does not require a 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(org.apache.commons.configuration2.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()

Description copied from interface: Graph

Generate a GraphComputer using the default engine of the underlying graph system. This is a shorthand method for the more involved method that uses Graph.compute(Class).

Specified by:

compute in interface Graph

Returns:

A default graph computer

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

io

public <I extends Io> I io(Io.Builder<I> builder)

Description copied from interface: Graph

Construct a particular Io implementation for reading and writing the Graph and other data. End-users will "select" the Io implementation that they want to use by supplying the Io.Builder that constructs it. In this way, Graph vendors can supply their IoRegistry to that builder thus allowing for custom serializers to be auto-configured into the Io instance. Registering custom serializers is particularly useful for those graphs that have complex types for Element identifiers.

For those graphs that do not need to register any custom serializers, the default implementation should suffice. If the default is overridden, take care to register the current graph via the Io.Builder.graph(Graph) method.

Specified by:

io in interface Graph

toString

public String toString()

Overrides:

toString in class Object

clear

public void clear()

close

public void close()

This method only has an effect if the GREMLIN_TINKERGRAPH_GRAPH_LOCATION is set, in which case the data in the graph is persisted to that location. This method may be called multiple times and does not release resources.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Graph

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 org.apache.commons.configuration2.Configuration configuration()

Description copied from interface: Graph

Get the Configuration associated with the construction of this graph. Whatever configuration was passed to GraphFactory.open(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 or Vertex objects themselves. If no ids are provided, get all vertices. Note that a vertex identifier does not need to correspond to the actual id used in the graph. It needs to be a bit more flexible than that in that given the Graph.Features around id support, multiple arguments might be applicable here.

If the graph return true for Graph.Features.ElementFeatures.supportsNumericIds() then it should support filters as with:

• g.vertices(v)
• g.vertices(v.id())
• g.vertices(1)
• g.vertices(1L)
• g.vertices(1.0d)
• g.vertices(1.0f)
• g.vertices("1")

If the graph return true for Graph.Features.ElementFeatures.supportsCustomIds() ()} then it should support filters as with:

• g.vertices(v)
• g.vertices(v.id())
• g.vertices(v.id().toString())

If the graph return true for Graph.Features.ElementFeatures.supportsAnyIds() ()} then it should support filters as with:

• g.vertices(v)
• g.vertices(v.id())

If the graph return true for Graph.Features.ElementFeatures.supportsStringIds() ()} then it should support filters as with:

• g.vertices(v)
• g.vertices(v.id().toString())
• g.vertices("id")

If the graph return true for Graph.Features.ElementFeatures.supportsStringIds() ()} then it should support filters as with:

• g.vertices(v)
• g.vertices(v.id().toString())
• g.vertices("id")

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 or Edge objects. If no ids are provided, get all edges. Note that an edge identifier does not need to correspond to the actual id used in the graph. It needs to be a bit more flexible than that in that given the Graph.Features around id support, multiple arguments might be applicable here.

If the graph return true for Graph.Features.ElementFeatures.supportsNumericIds() then it should support filters as with:

• g.edges(e)
• g.edges(e.id())
• g.edges(1)
• g.edges(1L)
• g.edges(1.0d)
• g.edges(1.0f)
• g.edges("1")

If the graph return true for Graph.Features.ElementFeatures.supportsCustomIds() ()} then it should support filters as with:

• g.edges(e)
• g.edges(e.id())
• g.edges(e.id().toString())

If the graph return true for Graph.Features.ElementFeatures.supportsAnyIds() ()} then it should support filters as with:

• g.edges(e)
• g.edges(e.id())

If the graph return true for Graph.Features.ElementFeatures.supportsStringIds() ()} then it should support filters as with:

• g.edges(e)
• g.edges(e.id().toString())
• g.edges("id")

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 Graph.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