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:com.helger.pd.indexer.lucene.PDLucene.java

License:Apache License

/**
 * Get a searcher on this index./*from   www.  jav a 2  s. c om*/
 *
 * @return <code>null</code> if no reader or no searcher could be obtained
 * @throws IOException
 *         On IO error
 */
@Nullable
public IndexSearcher getSearcher() throws IOException {
    _checkClosing();
    final IndexReader aReader = _getReader();
    if (aReader == null) {
        // Index not readable
        return null;
    }

    if (m_aSearchReader == aReader) {
        // Reader did not change - use cached searcher
        assert m_aSearcher != null;
        return m_aSearcher;
    }

    // Create new searcher only if necessary
    m_aSearchReader = aReader;
    m_aSearcher = new IndexSearcher(aReader);
    return m_aSearcher;
}

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From source file:com.hrstc.lucene.queryexpansion.PatentClassCodeBasedQueryExpansion.java

License:Apache License

public PatentClassCodeBasedQueryExpansion(String classCodesIndexDir, int Nbr_Terms, float alpha, float beta,
        float decay) throws IOException, Exception {
    Directory classCodesDir = FSDirectory.open(new File(classCodesIndexDir));
    classCodesSearcher = new IndexSearcher(DirectoryReader.open(classCodesDir));
    parameters = new HashMap<>();
    parameters.put(RocchioQueryExpansion.ROCCHIO_ALPHA_FLD, alpha);
    parameters.put(RocchioQueryExpansion.ROCCHIO_BETA_FLD, beta);
    parameters.put(RocchioQueryExpansion.DECAY_FLD, decay);
    this.Nbr_Terms = Nbr_Terms;

}

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From source file:com.hrstc.lucene.queryexpansion.PatentRocchioQueryExpansion.java

License:Apache License

public PatentRocchioQueryExpansion(String indexDir, int Nbr_Docs, int Nbr_Terms, int source, float alpha,
        float beta, float gamma, float decay) throws IOException, Exception {
    Directory dir = FSDirectory.open(new File(indexDir));
    searcher = new IndexSearcher(DirectoryReader.open(dir));
    parameters = new HashMap<>();
    parameters.put(RocchioQueryExpansion.ROCCHIO_ALPHA_FLD, alpha);
    parameters.put(RocchioQueryExpansion.ROCCHIO_BETA_FLD, beta);
    parameters.put(RocchioQueryExpansion.ROCCHIO_GAMMA_FLD, gamma);
    parameters.put(RocchioQueryExpansion.DECAY_FLD, decay);
    this.Nbr_Docs = Nbr_Docs;
    this.Nbr_Terms = Nbr_Terms;
    this.source = source;
    if (source <= 0 || source == 4 || source == 6 || source > 7) {
        throw new Exception("Invalid source of expansion!");
    }//  ww w  .j  a  va  2 s .  co m
}

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From source file:com.hrstc.lucene.queryreduction.PatentClassCodeBasedQueryReduction.java

License:Apache License

public PatentClassCodeBasedQueryReduction(String classCodesIndexDir, int Nbr_Terms)
        throws IOException, Exception {
    Directory classCodesDir = FSDirectory.open(new File(classCodesIndexDir));
    classCodesSearcher = new IndexSearcher(DirectoryReader.open(classCodesDir));
    this.Nbr_Terms = Nbr_Terms;

}

---

From source file:com.hrstc.lucene.queryreduction.PatentRocchioQueryReduction.java

License:Apache License

public PatentRocchioQueryReduction(String indexDir, int Nbr_Docs, int Nbr_Terms, int source, float alpha,
        float beta, float gamma, float decay) throws IOException, Exception {
    Directory dir = FSDirectory.open(new File(indexDir));
    searcher = new IndexSearcher(DirectoryReader.open(dir));
    parameters = new HashMap<>();
    parameters.put(RocchioQueryReduction.ROCCHIO_ALPHA_FLD, alpha);
    parameters.put(RocchioQueryReduction.ROCCHIO_BETA_FLD, beta);
    parameters.put(RocchioQueryReduction.ROCCHIO_GAMMA_FLD, gamma);
    parameters.put(RocchioQueryReduction.DECAY_FLD, decay);
    this.Nbr_Docs = Nbr_Docs;
    this.Nbr_Terms = Nbr_Terms;
    this.source = source;
    if (source <= 0 || source == 4 || source == 6 || source > 7) {
        throw new Exception("Invalid source of expansion!");
    }/*w  w  w  . j av a2  s  .c  om*/
}

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From source file:com.humi.lucene.test.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  ww  . ja v a  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++;
        }
    }

    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_4_10_0);

    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_4_10_0, 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();
}

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From source file:com.ibm.jaql.lang.expr.index.ProbeLuceneFn.java

License:Apache License

@Override
public JsonIterator iter(Context context) throws Exception {
    JsonRecord fd = (JsonRecord) exprs[0].eval(context);
    if (fd == null) {
        return JsonIterator.NULL;
    }/*  w  ww . ja v a 2s.c  o  m*/
    JsonString loc = (JsonString) fd.get(new JsonString("location"));
    if (loc == null) {
        return JsonIterator.NULL;
    }
    JsonString jquery = (JsonString) exprs[1].eval(context);
    if (jquery == null) {
        return JsonIterator.NULL;
    }

    HashSet<String> fields = null;
    JsonIterator iter = exprs[2].iter(context);
    for (JsonValue sv : iter) {
        JsonString s = (JsonString) sv;
        if (s != null) {
            if (fields == null) {
                fields = new HashSet<String>();
            }
            fields.add(s.toString());
        }
    }
    final FieldSelector fieldSelector = (fields == null) ? null
            : new SetBasedFieldSelector(fields, new HashSet<String>());

    final IndexSearcher searcher = new IndexSearcher(loc.toString());
    Analyzer analyzer = new StandardAnalyzer();
    QueryParser qp = new QueryParser("key", analyzer);
    Query query = qp.parse(jquery.toString());

    query = searcher.rewrite(query);
    final Scorer scorer = query.weight(searcher).scorer(searcher.getIndexReader());
    final BufferedJsonRecord rec = new BufferedJsonRecord();
    final JsonString jdoc = new JsonString("doc");
    final MutableJsonLong jdocid = new MutableJsonLong();

    return new JsonIterator(rec) {
        @Override
        public boolean moveNext() throws Exception {
            if (!scorer.next()) {
                return false;
            }
            rec.clear();
            int i = scorer.doc();
            jdocid.set(i);
            rec.add(jdoc, jdocid);
            if (fieldSelector != null) {
                Document doc = searcher.doc(i, fieldSelector);
                for (Object x : doc.getFields()) {
                    Field f = (Field) x;
                    String name = f.name();
                    byte[] val = f.binaryValue();
                    ByteArrayInputStream bais = new ByteArrayInputStream(val); // TODO: reuse
                    DataInputStream in = new DataInputStream(bais); // TODO: reuse
                    JsonValue ival = serializer.read(in, null);
                    rec.add(new JsonString(name), ival);
                }
            }
            return true; // currentValue == rec
        }
    };
}

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From source file:com.ibm.watson.developer_cloud.professor_languo.pipeline.primary_search.LuceneSearcher.java

License:Open Source License

@Override
public void initialize(Properties properties) throws SearchException {
    String resDirPath = properties.getProperty(ConfigurationConstants.INGESTION_BASE_DIR) + File.separator;
    if (properties.getProperty(ConfigurationConstants.INDEX_DIR_TYPE)
            .equals(ConfigurationConstants.IndexDirTypes.FS.toString())) {
        String indexDirPath = resDirPath + properties.getProperty(ConfigurationConstants.INDEX_DIR);
        try {/*from ww  w. j  a v a 2  s.c  om*/
            Directory indexDir = FSDirectory.open(new File(indexDirPath).toPath());
            indexReader = DirectoryReader.open(indexDir);
            searcher = new IndexSearcher(indexReader);
        } catch (IOException e) {
            throw new SearchException(e);
        }
    } else {
        throw new SearchException(Messages.getString("RetrieveAndRank.LUCENE_SEARCHER_INIT")); //$NON-NLS-1$
    }
    candidateAnswerNum = Integer.parseInt(properties.getProperty(ConfigurationConstants.CANDIDATE_ANSWER_NUM));
}

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From source file:com.ibm.watson.developer_cloud.professor_languo.pipeline.primary_search.LuceneSearcher.java

License:Open Source License

/**
 * @deprecated - should only be used in the Unit Tests<br>
 *             Initialize this {@link LuceneSearcher} using a given Lucene directory
 *
 * @param indexDir - The {@link Directory} containing the index
 * @throws SearchException//w w  w  .j  ava  2  s .  co m
 */
private void initialize(Directory indexDir) throws SearchException {
    try {
        indexReader = DirectoryReader.open(indexDir);
        searcher = new IndexSearcher(indexReader);
    } catch (IOException e) {
        throw new SearchException(e);
    }
}

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From source file:com.icdd.lucence.SearchFiles.java

License:Apache License

public void searchFiles() {
    // /*from   ww w  .ja  va 2s.  c o m*/
    String index = "F:/download/index/";
    // 
    String field = "contents";
    // 
    String queries = null;
    // 
    String queryString = null;
    int repeat = 0;
    // ????
    boolean raw = false;
    // ?10?
    int hitsPerPage = 10;

    try {
        IndexReader reader = DirectoryReader.open(FSDirectory.open(Paths.get(index)));
        IndexSearcher searcher = new IndexSearcher(reader);
        Analyzer analyzer = new StandardAnalyzer();

        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);
        while (true) {
            if (queryString == null && queries == null) {
                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;
            }
            try {
                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, 100);
                    }
                    Date end = new Date();
                    System.out.println("Time: " + (end.getTime() - start.getTime()) + "ms");
                }

                doPagingSearch(in, searcher, query, hitsPerPage, raw, queries == null && queryString == null);

            } catch (ParseException e) {

                e.printStackTrace();
            }

            if (queryString != null) {
                break;
            }
        }
        reader.close();
    } catch (IOException e) {

        e.printStackTrace();
    }
}

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