Example usage for org.apache.lucene.search IndexSearcher IndexSearcher

Introduction

In this page you can find the example usage for org.apache.lucene.search IndexSearcher IndexSearcher.

Prototype

public IndexSearcher(IndexReaderContext context) 

Source Link

Document

Creates a searcher searching the provided top-level IndexReaderContext .

Usage

From source file:LuceneSearchFiles.java

License:Apache License

/** Simple command-line based search demo. */
public static void search(String phrase, String field, int hitsPerPage) {
    try {/*  w  w  w  . j a v  a  2s.c o m*/
        IndexReader reader = DirectoryReader.open(FSDirectory.open(new File(m_index)));
        IndexSearcher searcher = new IndexSearcher(reader);
        Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);

        QueryParser parser = new QueryParser(Version.LUCENE_40, field, analyzer);

        Query query = parser.parse(phrase);
        System.out.println("Searching for: " + query.toString(field));

        searcher.search(query, null, hitsPerPage);

        TopDocs results = searcher.search(query, hitsPerPage);
        ScoreDoc[] hits = results.scoreDocs;

        for (ScoreDoc hit : hits) {
            Document doc = searcher.doc(hit.doc);
            //String path = doc.get("path");   
            String title = doc.get("title");
            System.out.println(hit.score + " -" + title);
        }
        reader.close();
    } catch (IOException e) {

    } catch (ParseException e) {

    }
}

---

From source file:TfIdfViewer.java

License:Apache License

/** Simple command-line based search demo. */
public static void main(String[] args) throws Exception {
    String usage = "Usage:\tjava QueryConvert [-index dir]";
    if (args.length > 0 && ("-h".equals(args[0]) || "-help".equals(args[0]))) {
        System.out.println(usage);
        System.exit(0);// w w  w  .  j  av a2s . c o  m
    }

    String index = "index";
    String field = "contents";
    String queries = null;
    String queryString = null;

    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++;
        }
    }

    // create a reader and a searcher for the index
    IndexReader reader = IndexReader.open(FSDirectory.open(new File(index)));
    IndexSearcher searcher = new IndexSearcher(reader);

    // create the reader from where we'll read filenames
    BufferedReader in = null;
    if (queries != null) {
        in = new BufferedReader(new InputStreamReader(new FileInputStream(queries), "UTF-8"));
    } else {
        in = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
    }

    while (true) {

        // get two filenames
        System.out.println("Enter filename 1 (or hit <RETURN>): ");
        String f1 = in.readLine();
        if (f1 == null || f1.length() == -1)
            break;
        f1 = f1.trim();
        if (f1.length() == 0)
            break;

        System.out.println("Enter filename 2: ");
        String f2 = in.readLine();

        // get the docId's of the two filenames in the index
        int id1 = findDocId(searcher, f1);
        if (id1 < 0) {
            System.out.println("No file " + f1 + " found in index!");
            break;
        }
        int id2 = findDocId(searcher, f2);
        if (id1 < 0) {
            System.out.println("No file " + f1 + " found in index!");
            break;
        }

        // convert them to tf-idf format
        TermWeight[] v1 = toTfIdf(reader, id1);
        TermWeight[] v2 = toTfIdf(reader, id2);

        // print them out,
        System.out.println("-----------------------");
        printTermWeightVector(v1);
        System.out.println("-----------------------");
        printTermWeightVector(v2);
        System.out.println("-----------------------");

        // and print their cosine similarity
        System.out.println("The cosine similarity of the two files is: " + cosineSimilarity(v1, v2));

    }
    searcher.close();
    reader.close();
}

---

From source file:action.indexing.IndexingTest.java

License:Apache License

protected int getHitCount(String fieldName, String searchString) throws IOException {
    IndexSearcher searcher = new IndexSearcher(directory); //4
    Term t = new Term(fieldName, searchString);
    Query query = new TermQuery(t); //5
    int hitCount = TestUtil.hitCount(searcher, query); //6
    searcher.close();//from  ww  w.  j a  v a  2  s  .  c o  m
    return hitCount;
}

---

From source file:action.meetlucene.Fragments.java

License:Apache License

public static void simpleSearch() throws IOException {
    Directory dir = FSDirectory.open(new File("index"));
    IndexSearcher searcher = new IndexSearcher(dir);
    Query q = new TermQuery(new Term("contents", "licenses"));
    TopDocs hits = searcher.search(q, 10);
    System.out.println(hits.scoreDocs.length);
    searcher.close();/*from w w w. ja  va  2  s  .c o  m*/
}

---

From source file:action.meetlucene.Searcher.java

License:Apache License

public static void search(String indexDir, String q) throws IOException, ParseException {

    Directory dir = FSDirectory.open(new File(indexDir)); //3
    IndexSearcher is = new IndexSearcher(dir); //3   

    QueryParser parser = new QueryParser(Version.LUCENE_30, "contents",
            new StandardAnalyzer(Version.LUCENE_30)); //4
    Query query = parser.parse(q); //4   
    long start = System.currentTimeMillis();
    TopDocs hits = is.search(query, 10); //5
    long end = System.currentTimeMillis();

    System.err.println("Found " + hits.totalHits + //6  
            " document(s) (in " + (end - start) + // 6
            " milliseconds) that matched query '" + // 6
            q + "':"); // 6

    for (ScoreDoc scoreDoc : hits.scoreDocs) {
        Document doc = is.doc(scoreDoc.doc); //7      
        System.out.println(doc.get("fullpath")); //8  
    }//from   w  w w .j  a  v  a 2s .  c  o  m

    is.close(); //9
}

---

From source file:action.searching.BasicSearchingTest.java

License:Apache License

public void testTerm() throws Exception {
    Directory dir = FSDirectory.open(new File(System.getProperty("index.dir"))); //A
    IndexSearcher searcher = new IndexSearcher(dir); //B

    Term t = new Term("subject", "ant");
    Query query = new TermQuery(t);
    TopDocs docs = searcher.search(query, 10);
    assertEquals("Ant in Action", //C
            1, docs.totalHits); //C

    t = new Term("subject", "junit");
    docs = searcher.search(new TermQuery(t), 10);
    assertEquals("Ant in Action, " + //D
            "JUnit in Action, Second Edition", //D
            2, docs.totalHits); //D

    searcher.close();/*w w w  .  ja  v  a  2s .  co m*/
    dir.close();
}

---

From source file:action.searching.BasicSearchingTest.java

License:Apache License

public void testKeyword() throws Exception {
    Directory dir = FSDirectory.open(new File(System.getProperty("index.dir")));
    IndexSearcher searcher = new IndexSearcher(dir);

    Term t = new Term("isbn", "9781935182023");
    Query query = new TermQuery(t);
    TopDocs docs = searcher.search(query, 10);
    assertEquals("JUnit in Action, Second Edition", 1, docs.totalHits);

    searcher.close();//  w  ww .  j  ava  2  s  . c  o  m
    dir.close();
}

---

From source file:action.searching.BasicSearchingTest.java

License:Apache License

public void testQueryParser() throws Exception {
    Directory dir = FSDirectory.open(new File(System.getProperty("index.dir")));
    IndexSearcher searcher = new IndexSearcher(dir);

    QueryParser parser = new QueryParser(Version.LUCENE_30, //A
            "contents", //A
            new SimpleAnalyzer()); //A

    Query query = parser.parse("+JUNIT +ANT -MOCK"); //B
    TopDocs docs = searcher.search(query, 10);
    assertEquals(1, docs.totalHits);/*from   w w  w  . j  av a 2 s .c o  m*/
    Document d = searcher.doc(docs.scoreDocs[0].doc);
    assertEquals("Ant in Action", d.get("title"));

    query = parser.parse("mock OR junit"); //B
    docs = searcher.search(query, 10);
    assertEquals("Ant in Action, " + "JUnit in Action, Second Edition", 2, docs.totalHits);

    searcher.close();
    dir.close();
}

---

From source file:al.franzis.lucene.header.search.SearchFiles.java

License:Apache License

/** Simple command-line based search demo. */
public static void main(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/java/4_0/demo.html for details.";
    if (args.length > 0 && ("-h".equals(args[0]) || "-help".equals(args[0]))) {
        System.out.println(usage);
        System.exit(0);/*w  w  w .  ja  va  2  s.c o m*/
    }

    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++;
        }
    }

    IndexSearcher searcher = new IndexSearcher(FSDirectory.open(new File(index)));
    Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_31);

    BufferedReader in = null;
    if (queries != null) {
        in = new BufferedReader(new InputStreamReader(new FileInputStream(queries), "UTF-8"));
    } else {
        in = new BufferedReader(new InputStreamReader(System.in, "UTF-8"));
    }
    QueryParser parser = new QueryParser(Version.LUCENE_31, 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;
        }
    }
    searcher.close();
}

---

From source file:antnlp.opie.indexsearch.SearchFiles.java

License:Apache License

/** Simple command-line based search demo. */
public static void main(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);/*from  w  w w .  ja v  a2 s . c  o m*/
    }

    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(Paths.get(index)));
    IndexSearcher searcher = new IndexSearcher(reader);
    //Analyzer analyzer = new StandardAnalyzer();
    //Analyzer analyzer = new StandardAnalyzer(CharArraySet.EMPTY_SET);
    Analyzer analyzer = new WhitespaceAnalyzer();

    BufferedReader in = null;
    if (queries != null) {
        in = Files.newBufferedReader(Paths.get(queries), StandardCharsets.UTF_8);
    } else {
        in = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
    }
    //QueryParser parser = new QueryParser(field, analyzer);
    QueryBuilder builder = new QueryBuilder(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);
        Query query = builder.createPhraseQuery(field, 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, 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();
}

---

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