| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.lucene.spatial.prefix; |
| |
| import org.locationtech.spatial4j.context.SpatialContext; |
| import org.locationtech.spatial4j.distance.DistanceUtils; |
| import org.locationtech.spatial4j.shape.Point; |
| import org.locationtech.spatial4j.shape.Shape; |
| import org.apache.lucene.spatial.SpatialMatchConcern; |
| import org.apache.lucene.spatial.StrategyTestCase; |
| import org.apache.lucene.spatial.prefix.tree.GeohashPrefixTree; |
| import org.apache.lucene.spatial.query.SpatialArgs; |
| import org.apache.lucene.spatial.query.SpatialOperation; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.junit.Test; |
| |
| import java.io.IOException; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| @LuceneTestCase.SuppressCodecs("SimpleText") |
| public class TestRecursivePrefixTreeStrategy extends StrategyTestCase { |
| |
| private int maxLength; |
| |
| //Tests should call this first. |
| private void init(int maxLength) { |
| this.maxLength = maxLength; |
| this.ctx = SpatialContext.GEO; |
| GeohashPrefixTree grid = new GeohashPrefixTree(ctx, maxLength); |
| this.strategy = new RecursivePrefixTreeStrategy(grid, getClass().getSimpleName()); |
| } |
| |
| @Test |
| public void testFilterWithVariableScanLevel() throws IOException { |
| init(GeohashPrefixTree.getMaxLevelsPossible()); |
| getAddAndVerifyIndexedDocuments(DATA_WORLD_CITIES_POINTS); |
| |
| //execute queries for each prefix grid scan level |
| for(int i = 0; i <= maxLength; i++) { |
| ((RecursivePrefixTreeStrategy)strategy).setPrefixGridScanLevel(i); |
| executeQueries(SpatialMatchConcern.FILTER, QTEST_Cities_Intersects_BBox); |
| } |
| } |
| |
| @Test |
| public void testOneMeterPrecision() { |
| init(GeohashPrefixTree.getMaxLevelsPossible()); |
| GeohashPrefixTree grid = (GeohashPrefixTree) ((RecursivePrefixTreeStrategy) strategy).getGrid(); |
| //DWS: I know this to be true. 11 is needed for one meter |
| double degrees = DistanceUtils.dist2Degrees(0.001, DistanceUtils.EARTH_MEAN_RADIUS_KM); |
| assertEquals(11, grid.getLevelForDistance(degrees)); |
| } |
| |
| @Test |
| public void testPrecision() throws IOException{ |
| init(GeohashPrefixTree.getMaxLevelsPossible()); |
| |
| Point iPt = ctx.makePoint(2.8028712999999925, 48.3708044);//lon, lat |
| addDocument(newDoc("iPt", iPt)); |
| commit(); |
| |
| Point qPt = ctx.makePoint(2.4632387000000335, 48.6003516); |
| |
| final double KM2DEG = DistanceUtils.dist2Degrees(1, DistanceUtils.EARTH_MEAN_RADIUS_KM); |
| final double DEG2KM = 1 / KM2DEG; |
| |
| final double DIST = 35.75;//35.7499... |
| assertEquals(DIST, ctx.getDistCalc().distance(iPt, qPt) * DEG2KM, 0.001); |
| |
| //distErrPct will affect the query shape precision. The indexed precision |
| // was set to nearly zilch via init(GeohashPrefixTree.getMaxLevelsPossible()); |
| final double distErrPct = 0.025; //the suggested default, by the way |
| final double distMult = 1+distErrPct; |
| |
| assertTrue(35.74*distMult >= DIST); |
| checkHits(q(qPt, 35.74 * KM2DEG, distErrPct), 1, null); |
| |
| assertTrue(30*distMult < DIST); |
| checkHits(q(qPt, 30 * KM2DEG, distErrPct), 0, null); |
| |
| assertTrue(33*distMult < DIST); |
| checkHits(q(qPt, 33 * KM2DEG, distErrPct), 0, null); |
| |
| assertTrue(34*distMult < DIST); |
| checkHits(q(qPt, 34 * KM2DEG, distErrPct), 0, null); |
| } |
| |
| private SpatialArgs q(Point pt, double distDEG, double distErrPct) { |
| Shape shape = ctx.makeCircle(pt, distDEG); |
| SpatialArgs args = new SpatialArgs(SpatialOperation.Intersects,shape); |
| args.setDistErrPct(distErrPct); |
| return args; |
| } |
| |
| private void checkHits(SpatialArgs args, int assertNumFound, int[] assertIds) { |
| SearchResults got = executeQuery(strategy.makeQuery(args), 100); |
| assertEquals("" + args, assertNumFound, got.numFound); |
| if (assertIds != null) { |
| Set<Integer> gotIds = new HashSet<>(); |
| for (SearchResult result : got.results) { |
| gotIds.add(Integer.valueOf(result.document.get("id"))); |
| } |
| for (int assertId : assertIds) { |
| assertTrue("has "+assertId,gotIds.contains(assertId)); |
| } |
| } |
| } |
| |
| } |