/**
* 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.Arrays;
import java.util.Collections;
import java.util.HashMap;
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.Transaction;
import org.neo4j.graphdb.index.Index;
import org.neo4j.graphdb.index.IndexManager;
import org.neo4j.graphdb.index.ReadableIndex;
import org.neo4j.graphdb.index.RelationshipIndex;
import org.neo4j.rest.graphdb.index.RestAutoIndexer;
import org.neo4j.test.ImpermanentGraphDatabase;
import org.neo4j.tooling.GlobalGraphOperations;
/**
* @author mh
* @since 09.05.11
*/
public class Neo4jDatabaseCleaner {
private GraphDatabaseService graph;
public Neo4jDatabaseCleaner(GraphDatabaseService graph) {
this.graph = graph;
}
public Map<String, Object> cleanDb() {
// if (graph instanceof ImpermanentGraphDatabase) {
// ((ImpermanentGraphDatabase)graph).cleanContent();
// return Collections.emptyMap();
// }
Map<String, Object> result = new HashMap<String, Object>();
Transaction tx = graph.beginTx();
try {
removeNodes(result);
clearIndex(result);
tx.success();
} finally {
tx.close();
}
return result;
}
private void removeNodes(Map<String, Object> result) {
int nodes = 0, relationships = 0;
for (Node node : GlobalGraphOperations.at(graph).getAllNodes()) {
for (Relationship rel : node.getRelationships(Direction.OUTGOING)) {
rel.delete();
relationships++;
}
node.delete();
nodes++;
}
result.put("nodes", nodes);
result.put("relationships", relationships);
}
private void clearIndex(Map<String, Object> result) {
IndexManager indexManager = graph.index();
result.put("node-indexes", Arrays.asList(indexManager.nodeIndexNames()));
result.put("relationship-indexes", Arrays.asList(indexManager.relationshipIndexNames()));
for (String ix : indexManager.nodeIndexNames()) {
deleteIndex(indexManager.forNodes(ix));
}
for (String ix : indexManager.relationshipIndexNames()) {
deleteIndex(indexManager.forRelationships(ix));
}
}
private void deleteIndex(Index index) {
try {
index.delete();
} catch (UnsupportedOperationException e) {
// pass
}
}
}