Java tutorial
/** * Copyright Andrey Prokopenko * * 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.codecs.test; import org.apache.solr.codecs.onsql.ONSQLCodec; import org.apache.solr.codecs.onsql.ONSQLWrapperDirectory; import java.io.File; import java.io.IOException; import java.util.Arrays; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.codecs.Codec; import org.apache.lucene.document.Field.Store; import org.apache.lucene.document.TextField; import org.apache.lucene.index.DirectoryReader; import org.apache.lucene.index.IndexReader; import org.apache.lucene.index.IndexWriter; import org.apache.lucene.index.IndexWriterConfig; import org.apache.lucene.queryparser.classic.ParseException; import org.apache.lucene.queryparser.classic.QueryParser; import org.apache.lucene.search.IndexSearcher; import org.apache.lucene.search.Query; import org.apache.lucene.search.TotalHitCountCollector; import org.apache.lucene.store.Directory; import org.apache.lucene.util.Version; public class testONSQLWrapperDirectory { public static final String INDEX_ROOT_FOLDER = "C:\\work\\search_engine\\codec\\index-dir"; public static void main(String[] args) { try { testUtil.initPropsONSQL(); //----------- index documents ------- StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_4_10_1); //Codec cd = new ONSQLCodec("omega"); //Codec.setDefault(cd); IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_4_10_1, analyzer); // recreate the index on each execution config.setOpenMode(IndexWriterConfig.OpenMode.CREATE_OR_APPEND); //config.setCodec(new SimpleTextCodec()); ONSQLCodec codec = new ONSQLCodec(); config.setCodec(codec); config.setUseCompoundFile(false); Directory luceneDir = new ONSQLWrapperDirectory(new File(INDEX_ROOT_FOLDER)); String[] list = luceneDir.listAll(); System.out.println("listall length=" + list.length); for (int i = 0; i < list.length; i++) { System.out.println(list[i]); } IndexWriter writer = new IndexWriter(luceneDir, config); writer.addDocument(Arrays.asList(new TextField("title", "The title of the first document", Store.YES), new TextField("content", "The content of the first document", Store.YES), new TextField("global_bu_id", "1b", Store.YES), new TextField("omega_order_num", "1n", Store.YES))); writer.addDocument(Arrays.asList(new TextField("title", "The tAtle of the second document", Store.YES), new TextField("content", "The content of the second document", Store.YES), new TextField("global_bu_id", "1k", Store.YES), new TextField("omega_order_num", "2b", Store.YES))); writer.addDocument(Arrays.asList(new TextField("title", "The title of the third document", Store.YES), new TextField("content", "The content of the third document", Store.YES), new TextField("global_bu_id", "2k", Store.YES), new TextField("omega_order_num", "3b", Store.YES))); writer.addDocument(Arrays.asList(new TextField("title", "The title of the fourth document", Store.YES), new TextField("content", "The content of the fourth document", Store.YES), new TextField("global_bu_id", "2k", Store.YES), new TextField("omega_order_num", "4b", Store.YES))); //writer.commit(); writer.close(); /* IndexReader reader = DirectoryReader.open(luceneDir); // now test for docs if (reader.numDocs() != 3) throw new IOException("amount of returned docs are less than indexed"); else System.out.println("test passed"); */ searchIndex("content", "second"); System.out.println("---- now we delete docs for second document----"); deleteDocs("content", "second"); System.out.println("--- and repeat search-----"); searchIndex("content", "second"); } catch (Throwable te) { te.printStackTrace(); } } public static void searchIndex(String searchField, String searchString) throws IOException, ParseException { System.out.println("Searching for '" + searchString + "'"); Directory luceneDir = new ONSQLWrapperDirectory(new File(INDEX_ROOT_FOLDER)); IndexReader indexReader = DirectoryReader.open(luceneDir); IndexSearcher indexSearcher = new IndexSearcher(indexReader); TotalHitCountCollector hitCountCollector = new TotalHitCountCollector(); StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_4_10_1); QueryParser queryParser = new QueryParser(Version.LUCENE_4_10_1, searchField, analyzer); Query query = queryParser.parse(searchString); indexSearcher.search(query, hitCountCollector); luceneDir.close(); System.out.println("Word: " + searchString + "; Number of hits: " + hitCountCollector.getTotalHits()); } public static void deleteDocs(String searchField, String searchString) throws IOException, ParseException { System.out.println("deleting docs for '" + searchString + "'"); IndexWriterConfig config = new IndexWriterConfig(Version.LUCENE_4_10_1, new StandardAnalyzer(Version.LUCENE_4_10_1)); config.setOpenMode(IndexWriterConfig.OpenMode.APPEND); ONSQLCodec codec = new ONSQLCodec(); config.setCodec(codec); config.setUseCompoundFile(false); Directory luceneDir = new ONSQLWrapperDirectory(new File(INDEX_ROOT_FOLDER)); IndexWriter writer = new IndexWriter(luceneDir, config); QueryParser queryParser = new QueryParser(Version.LUCENE_4_10_1, searchField, new StandardAnalyzer(Version.LUCENE_4_10_1)); Query query = queryParser.parse(searchString); writer.deleteDocuments(query); writer.commit(); writer.close(); luceneDir.close(); System.out.println("docs were deleted"); } }