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

List of usage examples for org.apache.lucene.search TermQuery TermQuery

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Introduction

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

Prototype

public TermQuery(Term t)

Source Link

Document

Constructs a query for the term t.

Usage

From source file:SimpleNaiveBayesClassifier.java

License:Apache License

/**
 * Returns the number of documents of the input class ( from the whole index or from a subset)
 * that contains the word ( in a specific field or in all the fields if no one selected)
 * @param word the token produced by the analyzer
 * @param term the term representing the class
 * @return the number of documents of the input class
 * @throws IOException if a low level I/O problem happens
 *//*from w w  w.  jav a  2s.  com*/
private int getWordFreqForClass(String word, Term term) throws IOException {
    BooleanQuery.Builder booleanQuery = new BooleanQuery.Builder();
    BooleanQuery.Builder subQuery = new BooleanQuery.Builder();
    for (String textFieldName : textFieldNames) {
        subQuery.add(
                new BooleanClause(new TermQuery(new Term(textFieldName, word)), BooleanClause.Occur.SHOULD));
    }
    booleanQuery.add(new BooleanClause(subQuery.build(), BooleanClause.Occur.MUST));
    booleanQuery.add(new BooleanClause(new TermQuery(term), BooleanClause.Occur.MUST));
    if (query != null) {
        booleanQuery.add(query, BooleanClause.Occur.MUST);
    }
    TotalHitCountCollector totalHitCountCollector = new TotalHitCountCollector();
    indexSearcher.search(booleanQuery.build(), totalHitCountCollector);
    return totalHitCountCollector.getTotalHits();
}

From source file:ContentBasedAnalysis.java

License:Apache License

private static int findDocId(IndexSearcher searcher, String filename) throws Exception {
    Term t = new Term("path", filename);
    Query q = new TermQuery(t);
    TopDocs td = searcher.search(q, 2);//from   w ww  . j a  v a 2  s.c  o  m
    if (td.totalHits < 1)
        return -1;
    else
        return td.scoreDocs[0].doc;
}

From source file:SearcherTest.java

/**
 * ?// w  w  w.j ava2 s.  c om
 * ???TermQuery
 * TermQuery??QueryTermQuery???????
 * ??????TermQuery??
 * Lucene??????????/
 * ??????????
 *
 * @throws Exception
 */
@Test
public void testTermQuery() throws Exception {
    String searchField = "contents";
    String q = "xxxxxxxxx$";
    Term t = new Term(searchField, q);
    Query query = new TermQuery(t);
    TopDocs hits = is.search(query, 10);
    System.out.println("? '" + q + "'" + hits.totalHits + "");
    for (ScoreDoc scoreDoc : hits.scoreDocs) {
        Document doc = is.doc(scoreDoc.doc);
        System.out.println(doc.get("fullPath"));
    }
}

From source file:SearcherTest.java

/**
 * ???BooleanQuery//from w  w  w  .  j  a v a  2s .c  om
 * BooleanQuery???Query
 * ?Query???Query
 * ?BooleanQuery??
 * BooleanQuery?????API??
 * ?BooleanQuery????API?
 *
 * @throws Exception
 */
@Test
public void testBooleanQuery() throws Exception {
    String searchField = "contents";
    String q1 = "xxxxxxxxx";
    String q2 = "oooooooooooooooo";
    Query query1 = new TermQuery(new Term(searchField, q1));
    Query query2 = new TermQuery(new Term(searchField, q2));
    BooleanQuery.Builder builder = new BooleanQuery.Builder();
    //  1MUSTMUST???
    //  2MUSTMUST_NOT??MUST_NOT??
    // 3SHOULDMUST_NOT?MUSTMUST_NOT
    // 4SHOULDMUSTMUST??,SHOULD???
    // 5SHOULDSHOULD???
    // 6MUST_NOTMUST_NOT?
    builder.add(query1, BooleanClause.Occur.MUST);
    builder.add(query2, BooleanClause.Occur.MUST);
    BooleanQuery booleanQuery = builder.build();
    TopDocs hits = is.search(booleanQuery, 10);
    System.out.println("? " + q1 + "And" + q2 + "" + hits.totalHits + "");
    for (ScoreDoc scoreDoc : hits.scoreDocs) {
        Document doc = is.doc(scoreDoc.doc);
        System.out.println(doc.get("fullPath"));
    }
}

From source file:SimpleNaiveBayesDocumentClassifier.java

License:Apache License

/**
 * Returns the number of documents of the input class ( from the whole index or from a subset)
 * that contains the word ( in a specific field or in all the fields if no one selected)
 *
 * @param word      the token produced by the analyzer
 * @param fieldName the field the word is coming from
 * @param term      the class term//  w  w  w  .  j a  va 2  s  .com
 * @return number of documents of the input class
 * @throws java.io.IOException If there is a low-level I/O error
 */
private int getWordFreqForClass(String word, String fieldName, Term term) throws IOException {
    BooleanQuery.Builder booleanQuery = new BooleanQuery.Builder();
    BooleanQuery.Builder subQuery = new BooleanQuery.Builder();
    subQuery.add(new BooleanClause(new TermQuery(new Term(fieldName, word)), BooleanClause.Occur.SHOULD));
    booleanQuery.add(new BooleanClause(subQuery.build(), BooleanClause.Occur.MUST));
    booleanQuery.add(new BooleanClause(new TermQuery(term), BooleanClause.Occur.MUST));
    if (query != null) {
        booleanQuery.add(query, BooleanClause.Occur.MUST);
    }
    TotalHitCountCollector totalHitCountCollector = new TotalHitCountCollector();
    indexSearcher.search(booleanQuery.build(), totalHitCountCollector);
    return totalHitCountCollector.getTotalHits();
}

From source file:NoPackageTest.java

License:LGPL

@Test
public void testMultipleEntitiesPerIndex() throws Exception {
    try (Session s = openSession()) {
        s.getTransaction().begin();/*from  www. j av a2s  . co  m*/
        NotPackagedEntity box = new NotPackagedEntity();
        box.title = "This feels dirty";
        s.persist(box);
        s.getTransaction().commit();
    }

    try (Session s = openSession()) {
        s.getTransaction().begin();
        TermQuery q = new TermQuery(new Term("title", "dirty"));
        List results = Search.getFullTextSession(s).createFullTextQuery(q, NotPackagedEntity.class).list();
        assertEquals(1, results.size());
    }
}

From source file:luceneInterface.java

License:Apache License

public static List<Document> query(String index, String stoppath, String question, int numResult, String sim)
        throws Exception {
    IndexReader reader = DirectoryReader.open(FSDirectory.open(Paths.get(index)));
    IndexSearcher searcher = new IndexSearcher(reader);

    Analyzer analyzer = new EnglishAnalyzer(StopFilter.makeStopSet(mygetStopwords(stoppath)));

    if (sim.equals("TFIDF"))
        searcher.setSimilarity(new ClassicSimilarity());
    else if (sim.equals("BM25"))
        searcher.setSimilarity(new BM25Similarity());
    else// w w  w.  ja  va  2  s  . c  o m
        searcher.setSimilarity(new BM25Similarity());

    String field = "contents";
    QueryParser parser = new QueryParser(field, analyzer);
    Query query = parser.parse(parser.escape(question));

    BooleanQuery.Builder bqb = new BooleanQuery.Builder();
    bqb.add(new TermQuery(new Term("contents", parser.escape(question))), BooleanClause.Occur.SHOULD);
    bqb.add(new TermQuery(new Term("sec", parser.escape(question))), BooleanClause.Occur.SHOULD);

    //        Term term = new Term(field, question);
    //        Query query = new TermQuery(term);

    //        TopDocs results = searcher.search(query, numResult);
    TopDocs results = searcher.search(parser.parse(bqb.build().toString()), numResult);

    ScoreDoc[] hits = results.scoreDocs;
    List<Document> docs = new ArrayList<Document>();

    int numTotalHits = results.totalHits;
    //        System.out.println(numTotalHits + " total matching documents");

    int end = Math.min(numTotalHits, numResult);

    String searchResult = "";
    //        System.out.println("Only results 1 - " + hits.length);

    for (int i = 0; i < end; i++) {
        Document doc = searcher.doc(hits[i].doc);
        docs.add(doc);
    }

    return docs;
}

From source file:TfIdfViewer.java

License:Apache License

private static int findDocId(IndexSearcher searcher, String filename) throws Exception {
    Term t = new Term("path", filename);
    Query q = new TermQuery(t);
    TopDocs td = searcher.search(q, 2); // get a list of docs matching the query
    if (td.totalHits < 1)
        return -1; // no hits found
    else/*from   w  ww .j  av a 2 s . c om*/
        return td.scoreDocs[0].doc; // returns first matching docId
}

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();// ww  w. j  ava  2  s . c om
    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();/* w ww. ja  v a  2  s .c  om*/
}