| /* |
| * 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.jackrabbit.oak.plugins.index.lucene.util; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.jackrabbit.oak.plugins.index.lucene.FieldNames; |
| import org.apache.jackrabbit.oak.query.QueryImpl; |
| import org.apache.jackrabbit.oak.spi.query.QueryIndex; |
| import org.apache.jackrabbit.oak.spi.state.NodeBuilder; |
| import org.apache.lucene.facet.Facets; |
| import org.apache.lucene.facet.FacetsCollector; |
| import org.apache.lucene.facet.FacetsConfig; |
| import org.apache.lucene.facet.MultiFacets; |
| import org.apache.lucene.facet.sortedset.DefaultSortedSetDocValuesReaderState; |
| import org.apache.lucene.facet.sortedset.SortedSetDocValuesFacetCounts; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.TopDocs; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * |
| */ |
| public class FacetHelper { |
| |
| private static final Logger LOGGER = LoggerFactory.getLogger(FacetHelper.class); |
| |
| /** |
| * IndexPaln Attribute name which refers to the name of the fields that should be used for facets. |
| */ |
| public static final String ATTR_FACET_FIELDS = "oak.facet.fields"; |
| |
| public static FacetsConfig getFacetsConfig(NodeBuilder definition) { |
| return new NodeStateFacetsConfig(definition); |
| } |
| |
| public static Facets getFacets(IndexSearcher searcher, Query query, TopDocs docs, QueryIndex.IndexPlan plan, boolean secure) throws IOException { |
| Facets facets = null; |
| @SuppressWarnings("unchecked") |
| List<String> facetFields = (List<String>) plan.getAttribute(ATTR_FACET_FIELDS); |
| if (facetFields != null && facetFields.size() > 0) { |
| Map<String, Facets> facetsMap = new HashMap<String, Facets>(); |
| |
| for (String facetField : facetFields) { |
| FacetsCollector facetsCollector = new FacetsCollector(); |
| try { |
| DefaultSortedSetDocValuesReaderState state = new DefaultSortedSetDocValuesReaderState( |
| searcher.getIndexReader(), FieldNames.createFacetFieldName(facetField)); |
| FacetsCollector.search(searcher, query, 10, facetsCollector); |
| facetsMap.put(facetField, secure ? |
| new FilteredSortedSetDocValuesFacetCounts(state, facetsCollector, plan.getFilter(), docs) : |
| new SortedSetDocValuesFacetCounts(state, facetsCollector)); |
| |
| } catch (IllegalArgumentException iae) { |
| LOGGER.warn("facets for {} not yet indexed", facetField); |
| } |
| } |
| if (facetsMap.size() > 0) { |
| facets = new MultiFacets(facetsMap); |
| } |
| |
| } |
| return facets; |
| } |
| |
| |
| public static String parseFacetField(String columnName) { |
| return columnName.substring(QueryImpl.REP_FACET.length() + 1, columnName.length() - 1); |
| } |
| } |