Java tutorial
package org.archive.search; /* * 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. */ import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.TreeMap; import org.apache.lucene.analysis.Analyzer; import org.apache.lucene.analysis.core.KeywordAnalyzer; import org.apache.lucene.analysis.standard.StandardAnalyzer; import org.apache.lucene.document.Document; import org.apache.lucene.index.DirectoryReader; import org.apache.lucene.index.IndexReader; import org.apache.lucene.queryparser.classic.MultiFieldQueryParser; import org.apache.lucene.queryparser.classic.QueryParser; import org.apache.lucene.search.IndexSearcher; import org.apache.lucene.search.Query; import org.apache.lucene.search.ScoreDoc; import org.apache.lucene.search.TopDocs; import org.apache.lucene.search.similarities.LMDirichletSimilarity; import org.apache.lucene.search.similarities.Similarity; import org.apache.lucene.store.FSDirectory; import org.apache.lucene.util.Version; import org.archive.TDirectory; import org.archive.dataset.TemLoader; import org.archive.dataset.TemLoader.TemRunType; import org.archive.util.IOBox; import org.archive.util.StrStr; import org.jdom.Element; import org.jdom.input.SAXBuilder; /** Simple command-line based search demo. */ public class IndexSearch { private static final boolean debug = false; public static enum SimType { LM, TFIDF }; //example-1 /** * This demonstrates a typical paging search scenario, where the search engine presents * pages of size n to the user. The user can then go to the next page if interested in * the next hits. * * When the query is executed for the first time, then only enough results are collected * to fill 5 result pages. If the user wants to page beyond this limit, then the query * is executed another time and all hits are collected. * */ public static void doPagingSearch(BufferedReader in, IndexSearcher searcher, Query query, int hitsPerPage, boolean raw, boolean interactive) throws IOException { // Collect enough docs to show 5 pages TopDocs results = searcher.search(query, 5 * hitsPerPage); ScoreDoc[] hits = results.scoreDocs; int numTotalHits = results.totalHits; System.out.println(numTotalHits + " total matching documents"); int start = 0; int end = Math.min(numTotalHits, hitsPerPage); while (true) { if (end > hits.length) { System.out.println("Only results 1 - " + hits.length + " of " + numTotalHits + " total matching documents collected."); System.out.println("Collect more (y/n) ?"); String line = in.readLine(); if (line.length() == 0 || line.charAt(0) == 'n') { break; } hits = searcher.search(query, numTotalHits).scoreDocs; } end = Math.min(hits.length, start + hitsPerPage); for (int i = start; i < end; i++) { if (raw) { // output raw format System.out.println("doc=" + hits[i].doc + " score=" + hits[i].score); continue; } Document doc = searcher.doc(hits[i].doc); String path = doc.get("path"); if (path != null) { System.out.println((i + 1) + ". " + path); String title = doc.get("title"); if (title != null) { System.out.println(" Title: " + doc.get("title")); } } else { System.out.println((i + 1) + ". " + "No path for this document"); } } if (!interactive || end == 0) { break; } if (numTotalHits >= end) { boolean quit = false; while (true) { System.out.print("Press "); if (start - hitsPerPage >= 0) { System.out.print("(p)revious page, "); } if (start + hitsPerPage < numTotalHits) { System.out.print("(n)ext page, "); } System.out.println("(q)uit or enter number to jump to a page."); String line = in.readLine(); if (line.length() == 0 || line.charAt(0) == 'q') { quit = true; break; } if (line.charAt(0) == 'p') { start = Math.max(0, start - hitsPerPage); break; } else if (line.charAt(0) == 'n') { if (start + hitsPerPage < numTotalHits) { start += hitsPerPage; } break; } else { int page = Integer.parseInt(line); if ((page - 1) * hitsPerPage < numTotalHits) { start = (page - 1) * hitsPerPage; break; } else { System.out.println("No such page"); } } } if (quit) break; end = Math.min(numTotalHits, start + hitsPerPage); } } } //example-2 /** Simple command-line based search demo. */ public static void exampleMain(String[] args) throws Exception { String usage = "Usage:\tjava org.apache.lucene.demo.SearchFiles [-index dir] [-field f] [-repeat n] [-queries file] [-query string] [-raw] [-paging hitsPerPage]\n\nSee http://lucene.apache.org/core/4_1_0/demo/ for details."; if (args.length > 0 && ("-h".equals(args[0]) || "-help".equals(args[0]))) { System.out.println(usage); System.exit(0); } String index = "index"; String field = "contents"; String queries = null; int repeat = 0; boolean raw = false; String queryString = null; int hitsPerPage = 10; for (int i = 0; i < args.length; i++) { if ("-index".equals(args[i])) { index = args[i + 1]; i++; } else if ("-field".equals(args[i])) { field = args[i + 1]; i++; } else if ("-queries".equals(args[i])) { queries = args[i + 1]; i++; } else if ("-query".equals(args[i])) { queryString = args[i + 1]; i++; } else if ("-repeat".equals(args[i])) { repeat = Integer.parseInt(args[i + 1]); i++; } else if ("-raw".equals(args[i])) { raw = true; } else if ("-paging".equals(args[i])) { hitsPerPage = Integer.parseInt(args[i + 1]); if (hitsPerPage <= 0) { System.err.println("There must be at least 1 hit per page."); System.exit(1); } i++; } } IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(index))); IndexSearcher searcher = new IndexSearcher(reader); // :Post-Release-Update-Version.LUCENE_XY: Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_48); BufferedReader in = null; if (queries != null) { in = new BufferedReader(new InputStreamReader(new FileInputStream(queries), StandardCharsets.UTF_8)); } else { in = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8)); } // :Post-Release-Update-Version.LUCENE_XY: QueryParser parser = new QueryParser(Version.LUCENE_48, field, analyzer); while (true) { if (queries == null && queryString == null) { // prompt the user System.out.println("Enter query: "); } String line = queryString != null ? queryString : in.readLine(); if (line == null || line.length() == -1) { break; } line = line.trim(); if (line.length() == 0) { break; } Query query = parser.parse(line); System.out.println("Searching for: " + query.toString(field)); if (repeat > 0) { // repeat & time as benchmark Date start = new Date(); for (int i = 0; i < repeat; i++) { searcher.search(query, null, 100); } Date end = new Date(); System.out.println("Time: " + (end.getTime() - start.getTime()) + "ms"); } doPagingSearch(in, searcher, query, hitsPerPage, raw, queries == null && queryString == null); if (queryString != null) { break; } } reader.close(); } /////////////////////// //search a lpFile via accessing index of ..._check.xml files /////////////////////// ////parameters for fetch lp files private static String lpIndexDir = "H:/v-haiyu/CodeBench/Pool_DataSet/DataSet_Temporalia/Temporalia/LPFileIndex/"; private static IndexReader lpIndexReader; private static IndexSearcher lpSearcher; private static Analyzer lpAnalyzer = new KeywordAnalyzer(); private static String lpField = "id"; private static QueryParser lpParser = new QueryParser(Version.LUCENE_48, lpField, lpAnalyzer); private static boolean lpIni = false; /****/ public static Document fetchLPFile(String fileID) throws Exception { if (!lpIni) { lpIndexReader = DirectoryReader.open(FSDirectory.open(new File(lpIndexDir))); lpSearcher = new IndexSearcher(lpIndexReader); lpIni = true; } Query query = lpParser.parse(fileID); TopDocs results = lpSearcher.search(query, 2); ScoreDoc[] hits = results.scoreDocs; Document lpDoc = lpSearcher.doc(hits[0].doc); return lpDoc; } //////////////////////// //search top-k results via accessing index of ..._solr.xml files //////////////////////// private static boolean solrIni = false; private static String solrIndexDir = "H:/solr-4.8.1/solr/example/solr/SingleFileTestCore/data/index/"; private static IndexReader solrIndexReader; private static IndexSearcher solrSearcher; private static Similarity solrSimilarity; //:Post-Release-Update-Version.LUCENE_XY: private static Analyzer solrAnalyzer; private static QueryParser solrParser; /** * * **/ public static ArrayList<ResultSlot> initialLuceneSearch(SimType simType, String searchQuery, int slotNumber) throws Exception { // String queryStr = "apple"; //int resultNum = 10; //String field = "content"; if (!solrIni) { solrIndexReader = DirectoryReader.open(FSDirectory.open(new File(solrIndexDir))); solrSearcher = new IndexSearcher(solrIndexReader); if (simType == SimType.LM) { solrSimilarity = new LMDirichletSimilarity(); solrSearcher.setSimilarity(solrSimilarity); } else if (simType == SimType.TFIDF) { //use default } else { System.err.println("SimType Input Error!"); System.exit(1); } solrAnalyzer = new StandardAnalyzer(Version.LUCENE_48); //solrParser = new QueryParser(Version.LUCENE_48, field, solrAnalyzer); solrParser = new MultiFieldQueryParser(Version.LUCENE_48, new String[] { "title", "content" }, solrAnalyzer); solrIni = true; } Query query = solrParser.parse(searchQuery); // Collect enough docs to show 5 pages TopDocs resultList = solrSearcher.search(query, slotNumber); ScoreDoc[] hitList = resultList.scoreDocs; ArrayList<ResultSlot> slotList = new ArrayList<>(); for (int i = 0; i < hitList.length; i++) { ScoreDoc hit = hitList[i]; // Document doc = solrSearcher.doc(hit.doc); // String id = doc.get("id"); slotList.add(new ResultSlot(id, (i + 1), hit.score)); } if (debug) { System.out.println("search results:"); System.out.println(); for (ScoreDoc hit : hitList) { System.out.println("doc=" + hit.doc + " score=" + hit.score); Document doc = solrSearcher.doc(hit.doc); String id = doc.get("id"); System.out.println("id\t" + id); System.out.println("-------- lp file -------"); System.out.println(fetchLPFile(id).get("text")); System.out.println(); } } return slotList; } /////////////////// //top-10 result for queries of ntcir11_Temporalia_NTCIR-11TQICQueriesFormalRun /////////////////// private static void getTop10Results(TemRunType runType) throws Exception { //queries String qFile; BufferedWriter top20IDWriter; BufferedWriter top20SolrWriter; BufferedWriter top20CheckWriter; if (runType == TemRunType.DryRun) { qFile = TDirectory.ROOT_DATASET + "Temporalia/DryRun/ntcir11_Temporalia_ntcir11-temporalia-tqic-dryrun.txt"; top20IDWriter = IOBox.getBufferedWriter_UTF8( TDirectory.ROOT_OUTPUT + "/top10/idmap_" + TemRunType.DryRun.toString() + ".txt"); top20SolrWriter = IOBox.getBufferedWriter_UTF8( TDirectory.ROOT_OUTPUT + "/top10/solr_" + TemRunType.DryRun.toString() + ".txt"); top20CheckWriter = IOBox.getBufferedWriter_UTF8( TDirectory.ROOT_OUTPUT + "/top10/check_" + TemRunType.DryRun.toString() + ".txt"); } else { qFile = TDirectory.ROOT_DATASET + "Temporalia/FormalRun/ntcir11_Temporalia_NTCIR-11TQICQueriesFormalRun.txt"; top20IDWriter = IOBox.getBufferedWriter_UTF8( TDirectory.ROOT_OUTPUT + "/top10/idmap_" + TemRunType.FormalRun.toString() + ".txt"); top20SolrWriter = IOBox.getBufferedWriter_UTF8( TDirectory.ROOT_OUTPUT + "/top10/solr_" + TemRunType.FormalRun.toString() + ".txt"); top20CheckWriter = IOBox.getBufferedWriter_UTF8( TDirectory.ROOT_OUTPUT + "/top10/check_" + TemRunType.FormalRun.toString() + ".txt"); } ArrayList<String> lineList = IOBox.getLinesAsAList_UTF8(qFile); //build a standard pseudo-xml file StringBuffer buffer = new StringBuffer(); buffer.append("<add>"); for (String line : lineList) { buffer.append(TemLoader.stripNonValidXMLCharacters(line)); } buffer.append("</add>"); SAXBuilder saxBuilder = new SAXBuilder(); org.jdom.Document xmlDoc = saxBuilder .build(new InputStreamReader(new ByteArrayInputStream(buffer.toString().getBytes("UTF-8")))); Element webtrackElement = xmlDoc.getRootElement(); List<Element> queryList = webtrackElement.getChildren("query"); ArrayList<StrStr> qList = new ArrayList<>(); for (Element query : queryList) { qList.add(new StrStr(query.getChildText("id").trim(), query.getChildText("query_string").trim())); } //solr search solrIndexReader = DirectoryReader.open(FSDirectory.open(new File(solrIndexDir))); solrSearcher = new IndexSearcher(solrIndexReader); solrSimilarity = new LMDirichletSimilarity(); solrSearcher.setSimilarity(solrSimilarity); solrAnalyzer = new StandardAnalyzer(Version.LUCENE_48); solrParser = new MultiFieldQueryParser(Version.LUCENE_48, new String[] { "title", "content" }, solrAnalyzer); //check search lpIndexReader = DirectoryReader.open(FSDirectory.open(new File(lpIndexDir))); lpSearcher = new IndexSearcher(lpIndexReader); // int count = 1; for (StrStr q : qList) { System.out.println((count++)); //1 Query solrQuery = solrParser.parse(q.second); TopDocs solrResultList = solrSearcher.search(solrQuery, 20); ScoreDoc[] solrHitList = solrResultList.scoreDocs; ArrayList<String> docidList = new ArrayList<>(); for (int i = 0; i < solrHitList.length; i++) { ScoreDoc solrHit = solrHitList[i]; Document doc = solrSearcher.doc(solrHit.doc); String docid = doc.get("id"); docidList.add(docid); } //id map top20IDWriter.write(q.first); top20IDWriter.newLine(); for (String docid : docidList) { top20IDWriter.write("\t" + docid); top20IDWriter.newLine(); } //solr doc for (int i = 0; i < solrHitList.length; i++) { ScoreDoc solrHit = solrHitList[i]; Document solrDoc = solrSearcher.doc(solrHit.doc); top20SolrWriter.write(TemLoader.toSolrXml(solrDoc)); top20SolrWriter.newLine(); } //check doc for (String docid : docidList) { Query checkQuery = lpParser.parse(docid); TopDocs checkResults = lpSearcher.search(checkQuery, 2); ScoreDoc[] checkHits = checkResults.scoreDocs; Document checkDoc = lpSearcher.doc(checkHits[0].doc); top20CheckWriter.write(TemLoader.toCheckXml(checkDoc)); top20CheckWriter.newLine(); } } // top20IDWriter.flush(); top20IDWriter.close(); top20SolrWriter.flush(); top20SolrWriter.close(); top20CheckWriter.flush(); top20CheckWriter.close(); } //////////////////// // //////////////////// public static void main(String[] args) throws Exception { //1 //IndexSearch.performSearch(); //2 top-10 //Just replace &? with &? in your HTML/Javascript code! /* try { IndexSearch.getTop10Results(TemRunType.FormalRun); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } */ //3 lpFetch ///* Document lpDocument = IndexSearch.fetchLPFile("sync3-20110803040101_2260"); System.out.println(lpDocument.get("text")); //*/ } }