| /* |
| * 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.solr.search.facet; |
| |
| import java.io.IOException; |
| import java.io.UncheckedIOException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Date; |
| import java.util.function.IntFunction; |
| |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.solr.schema.SchemaField; |
| |
| /** |
| * Base accumulator for {@link UnInvertedField} |
| */ |
| public abstract class UnInvertedFieldAcc extends SlotAcc implements UnInvertedField.Callback { |
| |
| UnInvertedField uif; |
| UnInvertedField.DocToTerm docToTerm; |
| SchemaField sf; |
| |
| public UnInvertedFieldAcc(FacetContext fcontext, SchemaField sf, int numSlots) throws IOException { |
| super(fcontext); |
| this.sf = sf; |
| uif = UnInvertedField.getUnInvertedField(sf.getName(), fcontext.qcontext.searcher()); |
| docToTerm = uif.new DocToTerm(); |
| fcontext.qcontext.addCloseHook(this); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| if (docToTerm != null) { |
| docToTerm.close(); |
| docToTerm = null; |
| } |
| } |
| |
| |
| abstract static class DoubleUnInvertedFieldAcc extends UnInvertedFieldAcc { |
| double[] result; |
| int currentSlot; |
| double initialValue; |
| |
| public DoubleUnInvertedFieldAcc(FacetContext fcontext, SchemaField sf, int numSlots, double initialValue) throws IOException { |
| super(fcontext, sf, numSlots); |
| result = new double[numSlots]; |
| if (initialValue != 0) { |
| this.initialValue = initialValue; |
| Arrays.fill(result, initialValue); |
| } |
| } |
| |
| @Override |
| public void collect(int doc, int slot, IntFunction<SlotContext> slotContext) throws IOException { |
| this.currentSlot = slot; |
| docToTerm.getBigTerms(doc + currentDocBase, this); |
| docToTerm.getSmallTerms(doc + currentDocBase, this); |
| } |
| |
| @Override |
| public int compare(int slotA, int slotB) { |
| return Double.compare(result[slotA], result[slotB]); |
| } |
| |
| @Override |
| public Object getValue(int slotNum) throws IOException { |
| return result[slotNum]; |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| Arrays.fill(result, initialValue); |
| } |
| |
| @Override |
| public void resize(Resizer resizer) { |
| this.result = resizer.resize(result, initialValue); |
| } |
| } |
| |
| /** |
| * Base accumulator to compute standard deviation and variance for uninvertible fields |
| */ |
| abstract static class SDVUnInvertedFieldAcc extends DoubleUnInvertedFieldAcc { |
| int[] counts; |
| double[] sum; |
| |
| public SDVUnInvertedFieldAcc(FacetContext fcontext, SchemaField sf, int numSlots) throws IOException { |
| super(fcontext, sf, numSlots, 0); |
| this.counts = new int[numSlots]; |
| this.sum = new double[numSlots]; |
| } |
| |
| @Override |
| public void call(int termNum) { |
| try { |
| BytesRef term = docToTerm.lookupOrd(termNum); |
| Object obj = sf.getType().toObject(sf, term); |
| double val = obj instanceof Date ? ((Date) obj).getTime() : ((Number) obj).doubleValue(); |
| result[currentSlot] += val * val; |
| sum[currentSlot] += val; |
| counts[currentSlot]++; |
| } catch (IOException e) { |
| // find a better way to do it |
| throw new UncheckedIOException(e); |
| } |
| } |
| |
| protected abstract double computeVal(int slot); |
| |
| @Override |
| public int compare(int slotA, int slotB) { |
| return Double.compare(computeVal(slotA), computeVal(slotB)); |
| } |
| |
| @Override |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| public Object getValue(int slot) { |
| if (fcontext.isShard()) { |
| ArrayList lst = new ArrayList(3); |
| lst.add(counts[slot]); |
| lst.add(result[slot]); |
| lst.add(sum[slot]); |
| return lst; |
| } else { |
| return computeVal(slot); |
| } |
| } |
| |
| @Override |
| public void reset() throws IOException { |
| super.reset(); |
| Arrays.fill(counts, 0); |
| Arrays.fill(sum, 0); |
| } |
| |
| @Override |
| public void resize(Resizer resizer) { |
| super.resize(resizer); |
| this.counts = resizer.resize(counts, 0); |
| this.sum = resizer.resize(sum, 0); |
| } |
| } |
| } |