| /* |
| * 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.bbox; |
| |
| import java.io.IOException; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.search.DoubleValues; |
| import org.apache.lucene.search.DoubleValuesSource; |
| import org.apache.lucene.search.Explanation; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.spatial.ShapeValues; |
| import org.apache.lucene.spatial.ShapeValuesSource; |
| import org.locationtech.spatial4j.shape.Rectangle; |
| |
| /** |
| * A base class for calculating a spatial relevance rank per document from a provided |
| * {@link ShapeValuesSource} returning a {@link |
| * org.locationtech.spatial4j.shape.Rectangle} per-document. |
| * <p> |
| * Implementers: remember to implement equals and hashCode if you have |
| * fields! |
| * |
| * @lucene.experimental |
| */ |
| public abstract class BBoxSimilarityValueSource extends DoubleValuesSource { |
| |
| private final ShapeValuesSource bboxValueSource; |
| |
| public BBoxSimilarityValueSource(ShapeValuesSource bboxValueSource) { |
| this.bboxValueSource = bboxValueSource; |
| } |
| |
| @Override |
| public DoubleValuesSource rewrite(IndexSearcher searcher) throws IOException { |
| return this; |
| } |
| |
| @Override |
| public String toString() { |
| return getClass().getSimpleName()+"(" + bboxValueSource.toString() + "," + similarityDescription() + ")"; |
| } |
| |
| /** A comma-separated list of configurable items of the subclass to put into {@link #toString()}. */ |
| protected abstract String similarityDescription(); |
| |
| @Override |
| public DoubleValues getValues(LeafReaderContext readerContext, DoubleValues scores) throws IOException { |
| |
| final ShapeValues shapeValues = bboxValueSource.getValues(readerContext); |
| return DoubleValues.withDefault(new DoubleValues() { |
| @Override |
| public double doubleValue() throws IOException { |
| return score((Rectangle) shapeValues.value(), null); |
| } |
| |
| @Override |
| public boolean advanceExact(int doc) throws IOException { |
| return shapeValues.advanceExact(doc); |
| } |
| }, 0); |
| |
| } |
| |
| /** |
| * Return a relevancy score. If {@code exp} is provided then diagnostic information is added. |
| * @param rect The indexed rectangle; not null. |
| * @param exp Optional diagnostic holder. |
| * @return a score. |
| */ |
| protected abstract double score(Rectangle rect, AtomicReference<Explanation> exp); |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false;//same class |
| |
| BBoxSimilarityValueSource that = (BBoxSimilarityValueSource) o; |
| |
| if (!bboxValueSource.equals(that.bboxValueSource)) return false; |
| |
| return true; |
| } |
| |
| @Override |
| public int hashCode() { |
| return bboxValueSource.hashCode(); |
| } |
| |
| @Override |
| public Explanation explain(LeafReaderContext ctx, int docId, Explanation scoreExplanation) throws IOException { |
| DoubleValues dv = getValues(ctx, DoubleValuesSource.constant(scoreExplanation.getValue().doubleValue()).getValues(ctx, null)); |
| if (dv.advanceExact(docId)) { |
| AtomicReference<Explanation> explanation = new AtomicReference<>(); |
| final ShapeValues shapeValues = bboxValueSource.getValues(ctx); |
| if (shapeValues.advanceExact(docId)) { |
| score((Rectangle) shapeValues.value(), explanation); |
| return explanation.get(); |
| } |
| } |
| return Explanation.noMatch(this.toString()); |
| } |
| |
| @Override |
| public boolean isCacheable(LeafReaderContext ctx) { |
| return bboxValueSource.isCacheable(ctx); |
| } |
| |
| @Override |
| public boolean needsScores() { |
| return false; |
| } |
| } |