package cc.twittertools.search.indexing;
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.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
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.Similarity;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.util.Version;
import org.apache.solr.common.params.SolrParams;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.search.similarities.LMDirichletSimilarityFactory;
import cc.twittertools.search.retrieval.QueryEnvironment.DocField;
/**
* Reference implementation for searching statuses.
*/
public class SearchStatuses {
private SearchStatuses() {}
private static final String INDEX_OPTION = "index";
private static final String QUERY_OPTION = "query";
private static final String NUM_HITS_OPTION = "num_hits";
private static final String MAX_ID_OPTION = "max_id";
private static final String SIMILARITY_OPTION = "similarity";
@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("num").hasArg()
.withDescription("number of hits to return").create(NUM_HITS_OPTION));
options.addOption(OptionBuilder.withArgName("num").hasArg()
.withDescription("max id").create(MAX_ID_OPTION));
options.addOption(OptionBuilder.withArgName("query").hasArg()
.withDescription("query").create(QUERY_OPTION));
options.addOption(OptionBuilder.withArgName("similarity").hasArg()
.withDescription("similarity to use (BM25, LM)").create(SIMILARITY_OPTION));
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 queryText = cmdline.getOptionValue(QUERY_OPTION);
int numHits = 10;
try {
if (cmdline.hasOption(NUM_HITS_OPTION)) {
numHits = Integer.parseInt(cmdline.getOptionValue(NUM_HITS_OPTION));
}
} catch (NumberFormatException e) {
System.err.println("Invalid " + NUM_HITS_OPTION + ": " + cmdline.getOptionValue(NUM_HITS_OPTION));
System.exit(-1);
}
long maxId = Long.MAX_VALUE;
try {
if (cmdline.hasOption(MAX_ID_OPTION)) {
maxId = Long.parseLong(cmdline.getOptionValue(MAX_ID_OPTION));
}
} catch (NumberFormatException e) {
System.err.println("Invalid " + MAX_ID_OPTION + ": " + cmdline.getOptionValue(MAX_ID_OPTION));
System.exit(-1);
}
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")) {
Similarity simBM25 = new BM25Similarity();
searcher.setSimilarity(simBM25);
} else if (similarity.equalsIgnoreCase("LM")) {
NamedList<Double> paramNamedList = new NamedList<Double>();
paramNamedList.add("mu", 2500.0);
SolrParams params = SolrParams.toSolrParams(paramNamedList);
LMDirichletSimilarityFactory factory = new LMDirichletSimilarityFactory();
factory.init(params);
Similarity simLMDir = factory.getSimilarity();
searcher.setSimilarity(simLMDir);
}
out.println("Using similarity: " + searcher.getSimilarity().toString());
QueryParser p = new QueryParser(Version.LUCENE_41, IndexStatuses.StatusField.TEXT.name, IndexStatuses.ANALYZER);
Query query = p.parse(queryText);
Filter filter = NumericRangeFilter.newLongRange(DocField.TIME.name, 0L, maxId, true, true);
out.println("Query: " + query);
TopDocs rs = searcher.search(query, filter, numHits);
for (ScoreDoc scoreDoc : rs.scoreDocs) {
Document hit = searcher.doc(scoreDoc.doc);
System.out.println(hit);
Field epoch = (Field) hit.getField(IndexStatuses.StatusField.EPOCH.name);
out.println(String.format("%s\t%s\t%s\t%s\t%s",
scoreDoc.score,
hit.getField(IndexStatuses.StatusField.ID.name).stringValue(),
hit.getField(IndexStatuses.StatusField.SCREEN_NAME.name).stringValue(),
(epoch == null ? "" : epoch.stringValue()),
hit.getField(IndexStatuses.StatusField.TEXT.name).stringValue()));
}
reader.close();
}
}