/**
* Copyright (c) 2002-2013 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.rest.graphdb;
import java.util.Map;
import org.neo4j.graphdb.Direction;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.Transaction;
import org.neo4j.graphdb.index.Index;
import org.neo4j.graphdb.index.IndexManager;
import org.neo4j.helpers.collection.MapUtil;
/**
* Creates a database using the matrix example for testing purposes
* @author Klemens Burchardi
* @since 03.08.11
*/
public class MatrixDataGraph {
private Node referenceNode;
long getNeoNodeId() {
Transaction transaction = getGraphDatabase().beginTx();
try {
return getNeoNode().getId();
} finally {
transaction.success();transaction.close();
}
}
public long getReferenceNodeId() {
return referenceNode.getId();
}
/** specify relationship types*/
public enum RelTypes implements RelationshipType{
NEO_NODE,
KNOWS,
FIGHTS,
CODED_BY,
PERSONS_REFERENCE,
HEROES_REFERENCE,
HERO,
VILLAINS_REFERENCE,
VILLAIN
}
private GraphDatabaseService graphDb;
public MatrixDataGraph(GraphDatabaseService graphDb){
this.graphDb = graphDb;
}
public MatrixDataGraph(GraphDatabaseService graphDb, long referenceNode) {
this.graphDb = graphDb;
this.referenceNode = getNodeById(graphDb, referenceNode);
}
private Node getNodeById(GraphDatabaseService graphDb, long id) {
try (Transaction tx = graphDb.beginTx()) {
Node node = graphDb.getNodeById(id);
tx.success();
return node;
}
}
/**
* fills the database with nodes and relationships, using the matrix example
* @return MatrixDataGraph the instance for chaining purposes
*/
public MatrixDataGraph createNodespace() {
try (Transaction tx = this.graphDb.beginTx()) {
if (this.referenceNode == null) {
referenceNode = this.graphDb.createNode();
}
//create the index for all characters that are considered good guys (sorry cypher)
IndexManager index = this.graphDb.index();
Index<Node> goodGuys = index.forNodes("heroes");
//create persons collection node
Node persons = this.graphDb.createNode();
persons.setProperty("type", "Persons Collection");
//create heroes collection node
Node heroes = this.graphDb.createNode();
heroes.setProperty("type", "Heroes Collection");
//create villains collection node
Node villains = this.graphDb.createNode();
villains.setProperty("type", "Villains Collection");
// create neo node
Node neo = this.graphDb.createNode();
addMultiplePropertiesToNode(neo, MapUtil.map("age", 29, "name", "Thomas Anderson", "type", "hero"));
// connect the persons collection node to the reference node
referenceNode.createRelationshipTo(persons, RelTypes.PERSONS_REFERENCE);
// connect the heroes collection node to the persons collection node
persons.createRelationshipTo(heroes, RelTypes.HEROES_REFERENCE);
// connect the villains collection node to the persons collection node
persons.createRelationshipTo(villains, RelTypes.VILLAINS_REFERENCE);
// connect neo to the reference node
referenceNode.createRelationshipTo(neo, RelTypes.NEO_NODE);
// connect neo to the heroes collection node
heroes.createRelationshipTo(neo, RelTypes.HERO);
// create trinity node
Node trinity = this.graphDb.createNode();
addMultiplePropertiesToNode(trinity, MapUtil.map("name", "Trinity", "type", "hero"));
createRelationshipWithProperties(neo, trinity, RelTypes.KNOWS, MapUtil.map("age", "3 days"));
// connect trinity to the heroes collection node
heroes.createRelationshipTo(trinity, RelTypes.HERO);
// create morpheus node
Node morpheus = this.graphDb.createNode();
addMultiplePropertiesToNode(morpheus, MapUtil.map("name", "Morpheus", "occupation", "Total badass", "rank", "Captain", "type", "hero"));
neo.createRelationshipTo(morpheus, RelTypes.KNOWS);
createRelationshipWithProperties(morpheus, trinity, RelTypes.KNOWS, MapUtil.map("age", "12 years"));
// connect morpheus to the heroes collection node
heroes.createRelationshipTo(morpheus, RelTypes.HERO);
//add all good guys to the index
addMultipleNodesToIndex(goodGuys, "name", MapUtil.map("Neo", neo, "Trinity", trinity, "Morpheus", morpheus));
// create cypher node
Node cypher = this.graphDb.createNode();
addMultiplePropertiesToNode(cypher, MapUtil.map("last name", "Reagan", "name", "Cypher", "type", "villain"));
trinity.createRelationshipTo(cypher, RelTypes.KNOWS);
createRelationshipWithProperties(morpheus, cypher, RelTypes.KNOWS, MapUtil.map("disclosure", "public"));
// connect cypher to the villains collection node
villains.createRelationshipTo(cypher, RelTypes.VILLAIN);
// create smith node
Node smith = this.graphDb.createNode();
addMultiplePropertiesToNode(smith, MapUtil.map("language", "C++", "name", "Agent Smith", "version", "1.0b", "type", "villain"));
neo.createRelationshipTo(smith, RelTypes.FIGHTS);
createRelationshipWithProperties(cypher, smith, RelTypes.KNOWS, MapUtil.map("age", "6 months", "disclosure", "secret"));
// connect smith to the villains collection node
villains.createRelationshipTo(smith, RelTypes.VILLAIN);
// create architect node
Node architect = this.graphDb.createNode();
architect.setProperty("name", "The Architect");
smith.createRelationshipTo(architect, RelTypes.CODED_BY);
tx.success();
}
return this;
}
public Node getReferenceNode() {
return referenceNode;
}
public void addMultiplePropertiesToNode(Node node, Map<String,Object> props){
for (Map.Entry<String, Object> entry : props.entrySet()){
node.setProperty(entry.getKey(), entry.getValue());
}
}
public void addMultipleNodesToIndex(Index<Node> indexName, String key, Map<String, Object> namedNodes){
for (Map.Entry<String, Object> entry : namedNodes.entrySet()){
indexName.add((Node)entry.getValue(), key, entry.getKey());
}
}
public void createRelationshipWithProperties(Node startNode, Node endNode, RelationshipType relType, Map<String,Object> props){
Relationship rel = startNode.createRelationshipTo(endNode, relType);
for (Map.Entry<String, Object> entry : props.entrySet()){
rel.setProperty(entry.getKey(), entry.getValue());
}
}
public GraphDatabaseService getGraphDatabase() {
return graphDb;
}
/**
* Get the Neo node. (a.k.a. Thomas Anderson node)
*
* @return the Neo node
*/
public Node getNeoNode() {
try (Transaction tx = graphDb.beginTx()) {
Node neoNode = this.referenceNode.getSingleRelationship(
RelTypes.NEO_NODE, Direction.OUTGOING).getEndNode();
tx.success();
return neoNode;
}
}
/**
* Get the Persons Collection node
*
* @return the Persons Collection node
*/
public Node getPersonsCollectionNode() {
try (Transaction tx = graphDb.beginTx()) {
Node personsCollection = this.referenceNode.getSingleRelationship(
RelTypes.PERSONS_REFERENCE, Direction.OUTGOING).getEndNode();
tx.success();
return personsCollection;
}
}
/**
* Get the Heroes Collection node
*
* @return the Heroes Collection node
*/
public Node getHeroesCollectionNode() {
try (Transaction tx = graphDb.beginTx()) {
Node heroesCollection = this.getPersonsCollectionNode().getSingleRelationship(
RelTypes.HEROES_REFERENCE, Direction.OUTGOING).getEndNode();
tx.success();
return heroesCollection;
}
}
/**
* Get the Villains Collection node
*
* @return the Villains Collection node
*/
public Node getVillainsCollectionNode() {
try (Transaction tx = graphDb.beginTx()) {
Node villainsCollection = this.getPersonsCollectionNode().getSingleRelationship(
RelTypes.VILLAINS_REFERENCE, Direction.OUTGOING).getEndNode();
tx.success();
return villainsCollection;
}
}
}