shaie commented on code in PR #841: URL: https://github.com/apache/lucene/pull/841#discussion_r876602835
########## lucene/facet/src/java/org/apache/lucene/facet/hyperrectangle/HyperRectangleFacetCounts.java: ########## @@ -0,0 +1,171 @@ +/* + * 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.facet.hyperrectangle; + +import java.io.IOException; +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import org.apache.lucene.document.LongPoint; +import org.apache.lucene.facet.FacetResult; +import org.apache.lucene.facet.Facets; +import org.apache.lucene.facet.FacetsCollector; +import org.apache.lucene.facet.LabelAndValue; +import org.apache.lucene.index.BinaryDocValues; +import org.apache.lucene.index.DocValues; +import org.apache.lucene.search.DocIdSetIterator; + +/** Get counts given a list of HyperRectangles (which must be of the same type) */ +public class HyperRectangleFacetCounts extends Facets { + /** Hypper rectangles passed to constructor. */ + protected final HyperRectangle[] hyperRectangles; + + /** Counts, initialized in subclass. */ + protected final int[] counts; + + /** Our field name. */ + protected final String field; + + /** Number of dimensions for field */ + protected final int dims; + + /** Total number of hits. */ + protected int totCount; + + /** + * Create HyperRectangleFacetCounts using + * + * @param field Field name + * @param hits Hits to facet on + * @param hyperRectangles List of long hyper rectangle facets + * @throws IOException If there is a problem reading the field + */ + public HyperRectangleFacetCounts( + String field, FacetsCollector hits, LongHyperRectangle... hyperRectangles) + throws IOException { + this(true, field, hits, hyperRectangles); + } + + /** + * Create HyperRectangleFacetCounts using + * + * @param field Field name + * @param hits Hits to facet on + * @param hyperRectangles List of double hyper rectangle facets + * @throws IOException If there is a problem reading the field + */ + public HyperRectangleFacetCounts( + String field, FacetsCollector hits, DoubleHyperRectangle... hyperRectangles) + throws IOException { + this(true, field, hits, hyperRectangles); + } + + private HyperRectangleFacetCounts( + boolean discarded, String field, FacetsCollector hits, HyperRectangle... hyperRectangles) + throws IOException { + assert hyperRectangles.length > 0 : "Hyper rectangle ranges cannot be empty"; + assert isHyperRectangleDimsConsistent(hyperRectangles) + : "All hyper rectangles must be the same dimensionality"; + this.field = field; + this.hyperRectangles = hyperRectangles; + this.dims = hyperRectangles[0].dims; + this.counts = new int[hyperRectangles.length]; + count(field, hits.getMatchingDocs()); + } + + private boolean isHyperRectangleDimsConsistent(HyperRectangle[] hyperRectangles) { + int dims = hyperRectangles[0].dims; + return Arrays.stream(hyperRectangles).allMatch(hyperRectangle -> hyperRectangle.dims == dims); + } + + /** Counts from the provided field. */ + private void count(String field, List<FacetsCollector.MatchingDocs> matchingDocs) + throws IOException { + + for (int i = 0; i < matchingDocs.size(); i++) { + + FacetsCollector.MatchingDocs hits = matchingDocs.get(i); + + BinaryDocValues binaryDocValues = DocValues.getBinary(hits.context.reader(), field); + + final DocIdSetIterator it = hits.bits.iterator(); + if (it == null) { + continue; + } + + for (int doc = it.nextDoc(); doc != DocIdSetIterator.NO_MORE_DOCS; ) { + if (binaryDocValues.advanceExact(doc)) { + long[] point = LongPoint.unpack(binaryDocValues.binaryValue()); + assert point.length == dims + : "Point dimension (dim=" + + point.length + + ") is incompatible with hyper rectangle dimension (dim=" + + dims + + ")"; + // linear scan, change this to use R trees + boolean docIsValid = false; + for (int j = 0; j < hyperRectangles.length; j++) { + boolean validPoint = true; + for (int dim = 0; dim < dims; dim++) { + HyperRectangle.LongRangePair range = hyperRectangles[j].getComparableDimRange(dim); + if (!range.accept(point[dim])) { + validPoint = false; + break; + } + } + if (validPoint) { + counts[j]++; + docIsValid = true; + } + } + if (docIsValid) { + totCount++; + } + } + doc = it.nextDoc(); + } + } + } + + @Override + public FacetResult getTopChildren(int topN, String dim, String... path) throws IOException { + validateTopN(topN); + if (field.equals(dim) == false) { + throw new IllegalArgumentException( + "invalid dim \"" + dim + "\"; should be \"" + field + "\""); + } + if (path.length != 0) { + throw new IllegalArgumentException("path.length should be 0"); Review Comment: Ugh you're right, I did get it backwards 🤦 -- This is an automated message from the Apache Git Service. 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