| package org.apache.lucene.facet.range; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.lucene.document.DoubleDocValuesField; // javadocs |
| import org.apache.lucene.document.FloatDocValuesField; // javadocs |
| import org.apache.lucene.facet.Facets; |
| import org.apache.lucene.facet.FacetsCollector; |
| import org.apache.lucene.facet.FacetsCollector.MatchingDocs; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.lucene.queries.function.valuesource.DoubleFieldSource; |
| import org.apache.lucene.queries.function.valuesource.FloatFieldSource; // javadocs |
| import org.apache.lucene.util.NumericUtils; |
| |
| /** {@link Facets} implementation that computes counts for |
| * dynamic double ranges from a provided {@link |
| * ValueSource}, using {@link FunctionValues#doubleVal}. Use |
| * this for dimensions that change in real-time (e.g. a |
| * relative time based dimension like "Past day", "Past 2 |
| * days", etc.) or that change for each request (e.g. |
| * distance from the user's location, "< 1 km", "< 2 km", |
| * etc.). |
| * |
| * <p> If you had indexed your field using {@link |
| * FloatDocValuesField} then pass {@link FloatFieldSource} |
| * as the {@link ValueSource}; if you used {@link |
| * DoubleDocValuesField} then pass {@link |
| * DoubleFieldSource} (this is the default used when you |
| * pass just a the field name). |
| * |
| * @lucene.experimental */ |
| public class DoubleRangeFacetCounts extends RangeFacetCounts { |
| |
| /** Create {@code RangeFacetCounts}, using {@link |
| * DoubleFieldSource} from the specified field. */ |
| public DoubleRangeFacetCounts(String field, FacetsCollector hits, DoubleRange... ranges) throws IOException { |
| this(field, new DoubleFieldSource(field), hits, ranges); |
| } |
| |
| /** Create {@code RangeFacetCounts}, using the provided |
| * {@link ValueSource}. */ |
| public DoubleRangeFacetCounts(String field, ValueSource valueSource, FacetsCollector hits, DoubleRange... ranges) throws IOException { |
| super(field, ranges); |
| count(valueSource, hits.getMatchingDocs()); |
| } |
| |
| private void count(ValueSource valueSource, List<MatchingDocs> matchingDocs) throws IOException { |
| |
| DoubleRange[] ranges = (DoubleRange[]) this.ranges; |
| |
| LongRange[] longRanges = new LongRange[ranges.length]; |
| for(int i=0;i<ranges.length;i++) { |
| DoubleRange range = ranges[i]; |
| longRanges[i] = new LongRange(range.label, |
| NumericUtils.doubleToSortableLong(range.minIncl), true, |
| NumericUtils.doubleToSortableLong(range.maxIncl), true); |
| } |
| |
| LongRangeCounter counter = new LongRangeCounter(longRanges); |
| |
| // Compute min & max over all ranges: |
| double minIncl = Double.POSITIVE_INFINITY; |
| double maxIncl = Double.NEGATIVE_INFINITY; |
| for(DoubleRange range : ranges) { |
| minIncl = Math.min(minIncl, range.minIncl); |
| maxIncl = Math.max(maxIncl, range.maxIncl); |
| } |
| |
| int missingCount = 0; |
| for (MatchingDocs hits : matchingDocs) { |
| FunctionValues fv = valueSource.getValues(Collections.emptyMap(), hits.context); |
| final int length = hits.bits.length(); |
| int doc = 0; |
| totCount += hits.totalHits; |
| while (doc < length && (doc = hits.bits.nextSetBit(doc)) != -1) { |
| // Skip missing docs: |
| if (fv.exists(doc)) { |
| counter.add(NumericUtils.doubleToSortableLong(fv.doubleVal(doc))); |
| } else { |
| missingCount++; |
| } |
| doc++; |
| } |
| } |
| |
| missingCount += counter.fillCounts(counts); |
| totCount -= missingCount; |
| } |
| } |