| /* |
| * 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.function.IntFunction; |
| |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.lucene.queries.function.valuesource.QueryValueSource; |
| import org.apache.lucene.search.DocValuesFieldExistsQuery; |
| import org.apache.lucene.search.Query; |
| import org.apache.solr.schema.SchemaField; |
| import org.apache.solr.search.function.FieldNameValueSource; |
| |
| /** |
| * {@link AggValueSource} to compute missing counts for given {@link ValueSource} |
| */ |
| public class MissingAgg extends SimpleAggValueSource { |
| |
| public MissingAgg(ValueSource vs) { |
| super("missing", 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.multiValued() || sf.getType().multiValuedFieldCache()) { |
| Query query = null; |
| if (sf.hasDocValues()) { |
| query = new DocValuesFieldExistsQuery(sf.getName()); |
| } else { |
| query = sf.getType().getRangeQuery(null, sf, null, null, false, false); |
| } |
| vs = new QueryValueSource(query, 0.0f); |
| } else { |
| vs = sf.getType().getValueSource(sf, null); |
| } |
| } |
| return new MissingSlotAcc(vs, fcontext, numSlots); |
| } |
| |
| @Override |
| public FacetMerger createFacetMerger(Object prototype) { |
| return new FacetModule.FacetLongMerger(); |
| } |
| |
| class MissingSlotAcc extends SlotAcc.LongFuncSlotAcc { |
| |
| public MissingSlotAcc(ValueSource values, FacetContext fcontext, int numSlots) { |
| super(values, fcontext, numSlots, 0); |
| } |
| |
| @Override |
| public void collect(int doc, int slot, IntFunction<SlotContext> slotContext) throws IOException { |
| if (!values.exists(doc)) { |
| result[slot]++; |
| } |
| } |
| } |
| |
| } |