| /* |
| * 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.document; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| import org.apache.lucene.geo.GeoEncodingUtils; |
| import org.apache.lucene.geo.Polygon; |
| import org.apache.lucene.geo.Polygon2D; |
| import org.apache.lucene.geo.Rectangle; |
| import org.apache.lucene.index.FieldInfo; |
| import org.apache.lucene.index.LeafReader; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.index.PointValues; |
| import org.apache.lucene.index.PointValues.IntersectVisitor; |
| import org.apache.lucene.index.PointValues.Relation; |
| import org.apache.lucene.search.ConstantScoreScorer; |
| import org.apache.lucene.search.ConstantScoreWeight; |
| import org.apache.lucene.search.DocIdSetIterator; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.QueryVisitor; |
| import org.apache.lucene.search.ScoreMode; |
| import org.apache.lucene.search.Scorer; |
| import org.apache.lucene.search.ScorerSupplier; |
| import org.apache.lucene.search.Weight; |
| import org.apache.lucene.util.DocIdSetBuilder; |
| import org.apache.lucene.util.NumericUtils; |
| |
| import static org.apache.lucene.geo.GeoEncodingUtils.decodeLatitude; |
| import static org.apache.lucene.geo.GeoEncodingUtils.decodeLongitude; |
| import static org.apache.lucene.geo.GeoEncodingUtils.encodeLatitude; |
| import static org.apache.lucene.geo.GeoEncodingUtils.encodeLongitude; |
| |
| /** Finds all previously indexed points that fall within the specified polygons. |
| * |
| * <p>The field must be indexed with using {@link org.apache.lucene.document.LatLonPoint} added per document. |
| * |
| * @lucene.experimental */ |
| |
| final class LatLonPointInPolygonQuery extends Query { |
| final String field; |
| final Polygon[] polygons; |
| |
| LatLonPointInPolygonQuery(String field, Polygon[] polygons) { |
| if (field == null) { |
| throw new IllegalArgumentException("field must not be null"); |
| } |
| if (polygons == null) { |
| throw new IllegalArgumentException("polygons must not be null"); |
| } |
| if (polygons.length == 0) { |
| throw new IllegalArgumentException("polygons must not be empty"); |
| } |
| for (int i = 0; i < polygons.length; i++) { |
| if (polygons[i] == null) { |
| throw new IllegalArgumentException("polygon[" + i + "] must not be null"); |
| } |
| } |
| this.field = field; |
| this.polygons = polygons.clone(); |
| // TODO: we could also compute the maximal inner bounding box, to make relations faster to compute? |
| } |
| |
| @Override |
| public void visit(QueryVisitor visitor) { |
| if (visitor.acceptField(field)) { |
| visitor.visitLeaf(this); |
| } |
| } |
| |
| private IntersectVisitor getIntersectVisitor(DocIdSetBuilder result, Polygon2D tree, GeoEncodingUtils.PolygonPredicate polygonPredicate, |
| byte[] minLat, byte[] maxLat, byte[] minLon, byte[] maxLon) { |
| return new IntersectVisitor() { |
| DocIdSetBuilder.BulkAdder adder; |
| |
| @Override |
| public void grow(int count) { |
| adder = result.grow(count); |
| } |
| |
| @Override |
| public void visit(int docID) { |
| adder.add(docID); |
| } |
| |
| @Override |
| public void visit(int docID, byte[] packedValue) { |
| if (polygonPredicate.test(NumericUtils.sortableBytesToInt(packedValue, 0), |
| NumericUtils.sortableBytesToInt(packedValue, Integer.BYTES))) { |
| visit(docID); |
| } |
| } |
| |
| @Override |
| public void visit(DocIdSetIterator iterator, byte[] packedValue) throws IOException { |
| if (polygonPredicate.test(NumericUtils.sortableBytesToInt(packedValue, 0), |
| NumericUtils.sortableBytesToInt(packedValue, Integer.BYTES))) { |
| int docID; |
| while ((docID = iterator.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) { |
| visit(docID); |
| } |
| } |
| } |
| |
| @Override |
| public Relation compare(byte[] minPackedValue, byte[] maxPackedValue) { |
| if (Arrays.compareUnsigned(minPackedValue, 0, Integer.BYTES, maxLat, 0, Integer.BYTES) > 0 || |
| Arrays.compareUnsigned(maxPackedValue, 0, Integer.BYTES, minLat, 0, Integer.BYTES) < 0 || |
| Arrays.compareUnsigned(minPackedValue, Integer.BYTES, Integer.BYTES + Integer.BYTES, maxLon, 0, Integer.BYTES) > 0 || |
| Arrays.compareUnsigned(maxPackedValue, Integer.BYTES, Integer.BYTES + Integer.BYTES, minLon, 0, Integer.BYTES) < 0) { |
| // outside of global bounding box range |
| return Relation.CELL_OUTSIDE_QUERY; |
| } |
| |
| double cellMinLat = decodeLatitude(minPackedValue, 0); |
| double cellMinLon = decodeLongitude(minPackedValue, Integer.BYTES); |
| double cellMaxLat = decodeLatitude(maxPackedValue, 0); |
| double cellMaxLon = decodeLongitude(maxPackedValue, Integer.BYTES); |
| |
| return tree.relate(cellMinLat, cellMaxLat, cellMinLon, cellMaxLon); |
| } |
| }; |
| } |
| |
| @Override |
| public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost) throws IOException { |
| |
| // bounding box over all polygons, this can speed up tree intersection/cheaply improve approximation for complex multi-polygons |
| // these are pre-encoded with LatLonPoint's encoding |
| final Rectangle box = Rectangle.fromPolygon(polygons); |
| final byte minLat[] = new byte[Integer.BYTES]; |
| final byte maxLat[] = new byte[Integer.BYTES]; |
| final byte minLon[] = new byte[Integer.BYTES]; |
| final byte maxLon[] = new byte[Integer.BYTES]; |
| NumericUtils.intToSortableBytes(encodeLatitude(box.minLat), minLat, 0); |
| NumericUtils.intToSortableBytes(encodeLatitude(box.maxLat), maxLat, 0); |
| NumericUtils.intToSortableBytes(encodeLongitude(box.minLon), minLon, 0); |
| NumericUtils.intToSortableBytes(encodeLongitude(box.maxLon), maxLon, 0); |
| |
| final Polygon2D tree = Polygon2D.create(polygons); |
| final GeoEncodingUtils.PolygonPredicate polygonPredicate = GeoEncodingUtils.createPolygonPredicate(polygons, tree); |
| |
| return new ConstantScoreWeight(this, boost) { |
| |
| @Override |
| public ScorerSupplier scorerSupplier(LeafReaderContext context) throws IOException { |
| LeafReader reader = context.reader(); |
| PointValues values = reader.getPointValues(field); |
| if (values == null) { |
| // No docs in this segment had any points fields |
| return null; |
| } |
| FieldInfo fieldInfo = reader.getFieldInfos().fieldInfo(field); |
| if (fieldInfo == null) { |
| // No docs in this segment indexed this field at all |
| return null; |
| } |
| LatLonPoint.checkCompatible(fieldInfo); |
| final Weight weight = this; |
| |
| return new ScorerSupplier() { |
| |
| long cost = -1; |
| DocIdSetBuilder result = new DocIdSetBuilder(reader.maxDoc(), values, field); |
| final IntersectVisitor visitor = getIntersectVisitor(result, tree, polygonPredicate, minLat, maxLat, minLon, maxLon); |
| |
| @Override |
| public Scorer get(long leadCost) throws IOException { |
| values.intersect(visitor); |
| return new ConstantScoreScorer(weight, score(), scoreMode, result.build().iterator()); |
| } |
| |
| @Override |
| public long cost() { |
| if (cost == -1) { |
| // Computing the cost may be expensive, so only do it if necessary |
| cost = values.estimateDocCount(visitor); |
| assert cost >= 0; |
| } |
| return cost; |
| } |
| }; |
| } |
| |
| @Override |
| public Scorer scorer(LeafReaderContext context) throws IOException { |
| ScorerSupplier scorerSupplier = scorerSupplier(context); |
| if (scorerSupplier == null) { |
| return null; |
| } |
| return scorerSupplier.get(Long.MAX_VALUE); |
| } |
| |
| @Override |
| public boolean isCacheable(LeafReaderContext ctx) { |
| return true; |
| } |
| }; |
| |
| } |
| |
| /** Returns the query field */ |
| public String getField() { |
| return field; |
| } |
| |
| /** Returns a copy of the internal polygon array */ |
| public Polygon[] getPolygons() { |
| return polygons.clone(); |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = classHash(); |
| result = prime * result + field.hashCode(); |
| result = prime * result + Arrays.hashCode(polygons); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| return sameClassAs(other) && |
| equalsTo(getClass().cast(other)); |
| } |
| |
| private boolean equalsTo(LatLonPointInPolygonQuery other) { |
| return field.equals(other.field) && |
| Arrays.equals(polygons, other.polygons); |
| } |
| |
| @Override |
| public String toString(String field) { |
| final StringBuilder sb = new StringBuilder(); |
| sb.append(getClass().getSimpleName()); |
| sb.append(':'); |
| if (this.field.equals(field) == false) { |
| sb.append(" field="); |
| sb.append(this.field); |
| sb.append(':'); |
| } |
| sb.append(Arrays.toString(polygons)); |
| return sb.toString(); |
| } |
| } |