| /* |
| * 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.util.List; |
| |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.solr.common.SolrException; |
| import org.apache.solr.schema.SchemaField; |
| import org.apache.solr.search.function.FieldNameValueSource; |
| |
| |
| public class VarianceAgg extends SimpleAggValueSource { |
| public VarianceAgg(ValueSource vs) { |
| super("variance", vs); |
| } |
| |
| @Override |
| public SlotAcc createSlotAcc(FacetContext fcontext, int numDocs, int numSlots) throws IOException { |
| ValueSource vs = getArg(); |
| |
| if (vs instanceof FieldNameValueSource) { |
| String field = ((FieldNameValueSource) vs).getFieldName(); |
| SchemaField sf = fcontext.qcontext.searcher().getSchema().getField(field); |
| if (sf.getType().getNumberType() == null) { |
| throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, |
| name() + " aggregation not supported for " + sf.getType().getTypeName()); |
| } |
| if (sf.multiValued() || sf.getType().multiValuedFieldCache()) { |
| if (sf.hasDocValues()) { |
| if (sf.getType().isPointField()) { |
| return new VarianceSortedNumericAcc(fcontext, sf, numSlots); |
| } |
| return new VarianceSortedSetAcc(fcontext, sf, numSlots); |
| } |
| if (sf.getType().isPointField()) { |
| throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, |
| name() + " aggregation not supported for PointField w/o docValues"); |
| } |
| return new VarianceUnInvertedFieldAcc(fcontext, sf, numSlots); |
| } |
| vs = sf.getType().getValueSource(sf, null); |
| } |
| return new SlotAcc.VarianceSlotAcc(vs, fcontext, numSlots); |
| } |
| |
| @Override |
| public FacetMerger createFacetMerger(Object prototype) { |
| return new Merger(); |
| } |
| |
| private static class Merger extends FacetModule.FacetDoubleMerger { |
| long count; |
| double sumSq; |
| double sum; |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public void merge(Object facetResult, Context mcontext1) { |
| List<Number> numberList = (List<Number>)facetResult; |
| this.count += numberList.get(0).longValue(); |
| this.sumSq += numberList.get(1).doubleValue(); |
| this.sum += numberList.get(2).doubleValue(); |
| } |
| |
| @Override |
| public Object getMergedResult() { |
| return this.getDouble(); |
| } |
| |
| @Override |
| protected double getDouble() { |
| return AggUtil.uncorrectedVariance(sumSq, sum, count); |
| } |
| } |
| |
| class VarianceSortedNumericAcc extends DocValuesAcc.SDVSortedNumericAcc { |
| |
| public VarianceSortedNumericAcc(FacetContext fcontext, SchemaField sf, int numSlots) throws IOException { |
| super(fcontext, sf, numSlots); |
| } |
| |
| @Override |
| protected double computeVal(int slot) { |
| return AggUtil.uncorrectedVariance(result[slot], sum[slot], counts[slot]); // calc once and cache in result? |
| } |
| } |
| |
| class VarianceSortedSetAcc extends DocValuesAcc.SDVSortedSetAcc { |
| |
| public VarianceSortedSetAcc(FacetContext fcontext, SchemaField sf, int numSlots) throws IOException { |
| super(fcontext, sf, numSlots); |
| } |
| |
| @Override |
| protected double computeVal(int slot) { |
| return AggUtil.uncorrectedVariance(result[slot], sum[slot], counts[slot]); // calc once and cache in result? |
| } |
| } |
| |
| class VarianceUnInvertedFieldAcc extends UnInvertedFieldAcc.SDVUnInvertedFieldAcc { |
| |
| public VarianceUnInvertedFieldAcc(FacetContext fcontext, SchemaField sf, int numSlots) throws IOException { |
| super(fcontext, sf, numSlots); |
| } |
| |
| @Override |
| protected double computeVal(int slot) { |
| return AggUtil.uncorrectedVariance(result[slot], sum[slot], counts[slot]); // calc once and cache in result? |
| } |
| } |
| } |