eu.ehri.project.core.impl

Class Neo4jGraphManager<T extends Neo4j2Graph>

java.lang.Object

eu.ehri.project.core.impl.BlueprintsGraphManager<T>

eu.ehri.project.core.impl.Neo4jGraphManager<T>

All Implemented Interfaces:

GraphManager

public final class Neo4jGraphManager<T extends Neo4j2Graph>
extends BlueprintsGraphManager<T>

Implementation of GraphManager that uses a single index to manage all nodes, with Neo4j Lucene query optimisations.

Field Summary

Fields

Modifier and Type	Field and Description
static String	BASE_LABEL

Fields inherited from class eu.ehri.project.core.impl.BlueprintsGraphManager

graph, METADATA_PREFIX

Constructor Summary

Constructors

Constructor and Description
Neo4jGraphManager(com.tinkerpop.frames.FramedGraph<T> graph)

Method Summary

Modifier and Type	Method and Description
static void	createIndicesAndConstraints(org.neo4j.graphdb.GraphDatabaseService graph) Create
com.tinkerpop.blueprints.Vertex	createVertex(String id, EntityClass type, Map<String,?> data) Create a vertex with the given id, type, and data.
boolean	exists(String id) Check if a node with the given ID exists or not.
com.tinkerpop.blueprints.Vertex	getVertex(String id) Get a node with the given ID.
com.tinkerpop.blueprints.CloseableIterable<com.tinkerpop.blueprints.Vertex>	getVertices(EntityClass type) Get a CloseableIterable of vertices with the given entity class.
com.tinkerpop.blueprints.CloseableIterable<com.tinkerpop.blueprints.Vertex>	getVertices(String key, Object value, EntityClass type) Get a CloseableIterable of vertices with the given type, and the given key/value property.
void	initialize()
com.tinkerpop.blueprints.Vertex	setLabels(com.tinkerpop.blueprints.Vertex vertex) Set labels on a Neo4j-based vertex.
com.tinkerpop.blueprints.Vertex	updateVertex(String id, EntityClass type, Map<String,?> data) Create a vertex with the given id, type, and data.

Methods inherited from class eu.ehri.project.core.impl.BlueprintsGraphManager

deleteVertex, deleteVertex, getEntities, getEntities, getEntity, getEntity, getEntityClass, getEntityClass, getGraph, getId, getProperties, getType, getVertices, renameVertex, setProperty

Methods inherited from class java.lang.Object

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

Field Detail

BASE_LABEL

public static final String BASE_LABEL

See Also:

Constant Field Values

Constructor Detail

Neo4jGraphManager

public Neo4jGraphManager(com.tinkerpop.frames.FramedGraph<T> graph)

Method Detail

exists

public boolean exists(String id)

Description copied from interface: GraphManager

Check if a node with the given ID exists or not.

Specified by:

exists in interface GraphManager

Overrides:

exists in class BlueprintsGraphManager<T extends Neo4j2Graph>

Parameters:

id - A string id

Returns:

Whether or not a node with that ID exists in the graph.

getVertex

public com.tinkerpop.blueprints.Vertex getVertex(String id)
                                          throws ItemNotFound

Description copied from interface: GraphManager

Get a node with the given ID.

Specified by:

getVertex in interface GraphManager

Overrides:

getVertex in class BlueprintsGraphManager<T extends Neo4j2Graph>

Parameters:

id - The vertex's string ID

Returns:

The vertex

Throws:

ItemNotFound

getVertices

public com.tinkerpop.blueprints.CloseableIterable<com.tinkerpop.blueprints.Vertex> getVertices(String key,
                                                                                               Object value,
                                                                                               EntityClass type)

Description copied from interface: GraphManager

Get a CloseableIterable of vertices with the given type, and the given key/value property.

Specified by:

getVertices in interface GraphManager

Overrides:

getVertices in class BlueprintsGraphManager<T extends Neo4j2Graph>

Parameters:

key - the property key

value - property value

type - the entity type

Returns:

an iterable of vertices with the given key/value properties

createVertex

public com.tinkerpop.blueprints.Vertex createVertex(String id,
                                                    EntityClass type,
                                                    Map<String,?> data)
                                             throws IntegrityError

Description copied from interface: GraphManager

Create a vertex with the given id, type, and data.

Specified by:

createVertex in interface GraphManager

Overrides:

createVertex in class BlueprintsGraphManager<T extends Neo4j2Graph>

Parameters:

id - The vertex's string ID

type - The entity type

data - The data map

Returns:

The new vertex

Throws:

IntegrityError - if an item with the given id already exists

updateVertex

public com.tinkerpop.blueprints.Vertex updateVertex(String id,
                                                    EntityClass type,
                                                    Map<String,?> data)
                                             throws ItemNotFound

Description copied from interface: GraphManager

Create a vertex with the given id, type, and data.

Specified by:

updateVertex in interface GraphManager

Overrides:

updateVertex in class BlueprintsGraphManager<T extends Neo4j2Graph>

Parameters:

id - The vertex's string ID

type - The entity type

data - The data map

Returns:

The updated vertex

Throws:

ItemNotFound

initialize

public void initialize()

Specified by:

initialize in interface GraphManager

Overrides:

initialize in class BlueprintsGraphManager<T extends Neo4j2Graph>

getVertices

public com.tinkerpop.blueprints.CloseableIterable<com.tinkerpop.blueprints.Vertex> getVertices(EntityClass type)

Description copied from interface: GraphManager

Get a CloseableIterable of vertices with the given entity class.

Specified by:

getVertices in interface GraphManager

Overrides:

getVertices in class BlueprintsGraphManager<T extends Neo4j2Graph>

Parameters:

type - The entity type

Returns:

An iterable of vertices belonging to that entity class

setLabels

public com.tinkerpop.blueprints.Vertex setLabels(com.tinkerpop.blueprints.Vertex vertex)

Set labels on a Neo4j-based vertex.

Parameters:

vertex - the vertex

Returns:

a vertex with labels set

createIndicesAndConstraints

public static void createIndicesAndConstraints(org.neo4j.graphdb.GraphDatabaseService graph)

Create