| /* |
| * 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.lucene.monitor; |
| |
| import java.util.Map; |
| import java.util.function.BiPredicate; |
| |
| import org.apache.lucene.document.Document; |
| import org.apache.lucene.index.LeafReader; |
| import org.apache.lucene.search.MatchAllDocsQuery; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.util.BytesRef; |
| |
| /** |
| * A Presearcher is used by the Monitor to reduce the number of queries actually |
| * run against a Document. It defines how queries are stored in the monitor's |
| * internal index, and how a Document is converted to a query against that |
| * index. |
| */ |
| public abstract class Presearcher { |
| |
| /** |
| * A Presearcher implementation that does no query filtering, and runs all |
| * registered queries |
| */ |
| public static final Presearcher NO_FILTERING = new Presearcher() { |
| @Override |
| public Query buildQuery(LeafReader reader, BiPredicate<String, BytesRef> termAcceptor) { |
| return new MatchAllDocsQuery(); |
| } |
| |
| @Override |
| public Document indexQuery(Query query, Map<String, String> metadata) { |
| return new Document(); |
| } |
| }; |
| |
| /** |
| * Build a query for a Monitor's queryindex from a LeafReader over a set of documents to monitor. |
| * |
| * @param reader a {@link LeafReader} over the input documents |
| * @param termAcceptor a predicate indicating if a term should be added to the query |
| * @return a Query to run over a Monitor's queryindex |
| */ |
| public abstract Query buildQuery(LeafReader reader, BiPredicate<String, BytesRef> termAcceptor); |
| |
| /** |
| * Build a lucene Document to index the query in a Monitor's queryindex |
| * |
| * @param query the Query to index |
| * @param metadata a Map of arbitrary query metadata |
| * @return a lucene Document to add to the queryindex |
| */ |
| public abstract Document indexQuery(Query query, Map<String, String> metadata); |
| |
| } |