it.inserpio.neo4art.spatial.SpatialQueriesTest.java Source code

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Here is the source code for it.inserpio.neo4art.spatial.SpatialQueriesTest.java

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/*
 * Copyright 2014 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package it.inserpio.neo4art.spatial;

import it.inserpio.neo4art.repository.MuseumRepository;

import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.neo4j.gis.spatial.indexprovider.LayerNodeIndex;
import org.neo4j.gis.spatial.indexprovider.SpatialIndexProvider;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.index.Index;
import org.neo4j.graphdb.index.IndexHits;
import org.neo4j.graphdb.index.IndexManager;
import org.neo4j.helpers.collection.MapUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.neo4j.conversion.Result;
import org.springframework.data.neo4j.support.Neo4jTemplate;
import org.springframework.data.neo4j.support.query.CypherQueryEngine;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author Lorenzo Speranzoni
 * @since Mar 23, 2014
 */
@Configuration
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "/META-INF/spring/application-context.xml" })
@Transactional
@EnableTransactionManagement
public class SpatialQueriesTest {
    @Autowired
    private Neo4jTemplate neo4jTemplate;

    @Test
    public void addMuseumToSpatialIndex() {
        GraphDatabaseService graphDatabaseService = this.neo4jTemplate.getGraphDatabaseService();

        IndexManager indexManager = graphDatabaseService.index();

        Map<String, String> config = Collections.unmodifiableMap(MapUtil.stringMap(
                SpatialIndexProvider.GEOMETRY_TYPE, LayerNodeIndex.POINT_GEOMETRY_TYPE, IndexManager.PROVIDER,
                SpatialIndexProvider.SERVICE_NAME, LayerNodeIndex.WKT_PROPERTY_KEY, "wkt"));

        Index<Node> index = indexManager.forNodes(MuseumRepository.MUSEUM_GEOSPATIAL_INDEX, config);

        Iterator<Node> museums = this.neo4jTemplate.query("MATCH (m:MUSEUM) RETURN m", null).to(Node.class)
                .iterator();

        while (museums.hasNext()) {
            Node museum = museums.next();

            if (museum.hasProperty("wkt")) {
                System.out.println("Adding " + museum.getProperty("name") + " to "
                        + MuseumRepository.MUSEUM_GEOSPATIAL_INDEX + " index...");

                index.add(museum, "dummy", "value");
            } else {
                System.out.println(museum.getProperty("name") + " NOT ADDED to "
                        + MuseumRepository.MUSEUM_GEOSPATIAL_INDEX + " index...");
            }
        }
    }

    @Test
    public void shouldExtractNationalGallery() {
        GraphDatabaseService graphDatabaseService = this.neo4jTemplate.getGraphDatabaseService();

        IndexManager indexManager = graphDatabaseService.index();

        Map<String, Object> params = new HashMap<String, Object>();
        params.put(LayerNodeIndex.POINT_PARAMETER, new Double[] { 51.5086, -0.1283 });
        params.put(LayerNodeIndex.DISTANCE_IN_KM_PARAMETER, 0.1);

        Map<String, String> config = Collections.unmodifiableMap(MapUtil.stringMap(
                SpatialIndexProvider.GEOMETRY_TYPE, LayerNodeIndex.POINT_GEOMETRY_TYPE, IndexManager.PROVIDER,
                SpatialIndexProvider.SERVICE_NAME, LayerNodeIndex.WKT_PROPERTY_KEY, "wkt"));

        String geoQuery = LayerNodeIndex.WITHIN_DISTANCE_QUERY;

        Index<Node> index = indexManager.forNodes(MuseumRepository.MUSEUM_GEOSPATIAL_INDEX, config);
        Assert.assertNotNull(index);
        IndexHits<Node> hits = index.query(geoQuery, params);
        Assert.assertTrue(hits.hasNext());

        CypherQueryEngine engine = this.neo4jTemplate.queryEngineFor();
        Result<Map<String, Object>> result = engine.query("start ng=node:"
                + MuseumRepository.MUSEUM_GEOSPATIAL_INDEX + "('withinDistance:[51.5086,-0.1283,0.1]') return ng",
                null);
        Assert.assertTrue(result.iterator().hasNext());
    }
}