/**
* Twitter Tools
*
* Licensed 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 cc.twittertools.search.local;
import java.io.File;
import java.io.PrintStream;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.NumericRangeFilter;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.search.similarities.BM25Similarity;
import org.apache.lucene.search.similarities.LMDirichletSimilarity;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;
import cc.twittertools.index.IndexStatuses;
import cc.twittertools.index.IndexStatuses.StatusField;
/**
* Reference implementation for searching statuses.
*/
public class SearchStatuses {
private SearchStatuses() {}
// Defaults: if user doesn't specify an actual query, run MB01 as a demo.
private static final String DEFAULT_QID = "MB01";
private static final String DEFAULT_Q = "BBC World Service staff cuts";
private static final long DEFAULT_MAX_ID = 34952194402811905L;
private static final int DEFAULT_NUM_RESULTS = 10;
private static final String DEFAULT_RUNTAG = "lucene4lm";
private static final String INDEX_OPTION = "index";
private static final String QID_OPTION = "qid";
private static final String QUERY_OPTION = "q";
private static final String RUNTAG_OPTION = "runtag";
private static final String MAX_ID_OPTION = "max_id";
private static final String NUM_RESULTS_OPTION = "num_results";
private static final String SIMILARITY_OPTION = "similarity";
private static final String VERBOSE_OPTION = "verbose";
@SuppressWarnings("static-access")
public static void main(String[] args) throws Exception {
Options options = new Options();
options.addOption(OptionBuilder.withArgName("path").hasArg()
.withDescription("index location").create(INDEX_OPTION));
options.addOption(OptionBuilder.withArgName("string").hasArg()
.withDescription("query id").create(QID_OPTION));
options.addOption(OptionBuilder.withArgName("string").hasArg()
.withDescription("query text").create(QUERY_OPTION));
options.addOption(OptionBuilder.withArgName("string").hasArg()
.withDescription("runtag").create(RUNTAG_OPTION));
options.addOption(OptionBuilder.withArgName("num").hasArg()
.withDescription("maxid").create(MAX_ID_OPTION));
options.addOption(OptionBuilder.withArgName("num").hasArg()
.withDescription("number of results to return").create(NUM_RESULTS_OPTION));
options.addOption(OptionBuilder.withArgName("similarity").hasArg()
.withDescription("similarity to use (BM25, LM)").create(SIMILARITY_OPTION));
options.addOption(new Option(VERBOSE_OPTION, "print out complete document"));
CommandLine cmdline = null;
CommandLineParser parser = new GnuParser();
try {
cmdline = parser.parse(options, args);
} catch (ParseException exp) {
System.err.println("Error parsing command line: " + exp.getMessage());
System.exit(-1);
}
if (!cmdline.hasOption(QUERY_OPTION) || !cmdline.hasOption(INDEX_OPTION)) {
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp(SearchStatuses.class.getName(), options);
System.exit(-1);
}
File indexLocation = new File(cmdline.getOptionValue(INDEX_OPTION));
if (!indexLocation.exists()) {
System.err.println("Error: " + indexLocation + " does not exist!");
System.exit(-1);
}
String qid = cmdline.hasOption(QID_OPTION) ?
cmdline.getOptionValue(QID_OPTION) : DEFAULT_QID;
String queryText = cmdline.hasOption(QUERY_OPTION) ?
cmdline.getOptionValue(QUERY_OPTION) : DEFAULT_Q;
String runtag = cmdline.hasOption(RUNTAG_OPTION) ?
cmdline.getOptionValue(RUNTAG_OPTION) : DEFAULT_RUNTAG;
long maxId = cmdline.hasOption(MAX_ID_OPTION) ?
Long.parseLong(cmdline.getOptionValue(MAX_ID_OPTION)) : DEFAULT_MAX_ID;
int numResults = cmdline.hasOption(NUM_RESULTS_OPTION) ?
Integer.parseInt(cmdline.getOptionValue(NUM_RESULTS_OPTION)) : DEFAULT_NUM_RESULTS;
boolean verbose = cmdline.hasOption(VERBOSE_OPTION);
String similarity = "LM";
if (cmdline.hasOption(SIMILARITY_OPTION)) {
similarity = cmdline.getOptionValue(SIMILARITY_OPTION);
}
PrintStream out = new PrintStream(System.out, true, "UTF-8");
IndexReader reader = DirectoryReader.open(FSDirectory.open(indexLocation));
IndexSearcher searcher = new IndexSearcher(reader);
if (similarity.equalsIgnoreCase("BM25")) {
searcher.setSimilarity(new BM25Similarity());
} else if (similarity.equalsIgnoreCase("LM")) {
searcher.setSimilarity(new LMDirichletSimilarity(2500.0f));
}
QueryParser p = new QueryParser(Version.LUCENE_43, IndexStatuses.StatusField.TEXT.name, IndexStatuses.ANALYZER);
Query query = p.parse(queryText);
Filter filter = NumericRangeFilter.newLongRange(StatusField.ID.name, 0L, maxId, true, true);
TopDocs rs = searcher.search(query, filter, numResults);
int i = 1;
for (ScoreDoc scoreDoc : rs.scoreDocs) {
Document hit = searcher.doc(scoreDoc.doc);
out.println(String.format("%s Q0 %s %d %f %s", qid,
hit.getField(StatusField.ID.name).numericValue(), i, scoreDoc.score, runtag));
if (verbose) {
out.println("# " + hit.toString().replaceAll("[\\n\\r]+", " "));
}
i++;
}
reader.close();
out.close();
}
}