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

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

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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.czw.search.lucene.example.facet.SimpleFacetsExample.java

License:Apache License

/**
 * User runs a query and counts facets only without collecting the matching documents.
 *//*from  w w  w . jav a  2s.  c  o  m*/
private List<FacetResult> facetsOnly() throws IOException {
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);

    FacetsCollector fc = new FacetsCollector();

    // MatchAllDocsQuery is for "browsing" (counts facets
    // for all non-deleted docs in the index); normally
    // you'd use a "normal" query:
    searcher.search(new MatchAllDocsQuery(), fc);

    // Retrieve results
    List<FacetResult> results = new ArrayList<>();

    // Count both "Publish Date" and "Author" dimensions
    Facets facets = new FastTaxonomyFacetCounts(taxoReader, config, fc);

    results.add(facets.getTopChildren(10, "Author"));
    results.add(facets.getTopChildren(10, "Publish Date"));
    results.add(facets.getTopChildren(10, "Category"));

    indexReader.close();
    taxoReader.close();

    return results;
}

From source file:com.czw.search.lucene.example.facet.SimpleFacetsExample.java

License:Apache License

/**
 * User drills down on 'Publish Date/2011', and we
 * return facets for 'Author'/*from  w w w.  jav  a 2 s . c  om*/
 */
private FacetResult drillDown() throws IOException {
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);

    // Passing no baseQuery means we drill down on all
    // documents ("browse only"):
    DrillDownQuery q = new DrillDownQuery(config);

    // Now user drills down on Publish Date/2010:
    q.add("Publish Date", "2010");
    FacetsCollector fc = new FacetsCollector();
    FacetsCollector.search(searcher, q, 10, fc);

    // Retrieve results
    Facets facets = new FastTaxonomyFacetCounts(taxoReader, config, fc);
    FacetResult result = facets.getTopChildren(10, "Author");

    indexReader.close();
    taxoReader.close();

    return result;
}

From source file:com.czw.search.lucene.example.facet.SimpleFacetsExample.java

License:Apache License

/**
 * User drills down on 'Publish Date/2012', and we
 * return facets for both 'Publish Date' and 'Author',
 * using DrillSideways.//from ww w.j  av  a2  s.  co m
 */
private List<FacetResult> drillSideways() throws IOException {
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);

    // Passing no baseQuery means we drill down on all
    // documents ("browse only"):
    DrillDownQuery q = new DrillDownQuery(config);

    // Now user drills down on Publish Date/2010:
    q.add("Publish Date", "2010");

    DrillSideways ds = new DrillSideways(searcher, config, taxoReader);
    DrillSidewaysResult result = ds.search(q, 10);

    // Retrieve results
    List<FacetResult> facets = result.facets.getAllDims(10);
    System.out.println("totalHits:" + result.hits.totalHits);
    ScoreDoc[] docs = result.hits.scoreDocs;
    System.out.println(searcher.doc(docs[0].doc));

    indexReader.close();
    taxoReader.close();

    return facets;
}

From source file:com.czw.search.lucene.example.facet.SimpleSortedSetFacetsExample.java

License:Apache License

/**
 * User runs a query and counts facets./*  w ww  .j  a  v  a2s. c o  m*/
 */
private List<FacetResult> search() throws IOException {
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    SortedSetDocValuesReaderState state = new DefaultSortedSetDocValuesReaderState(indexReader);

    // Aggregatses the facet counts
    FacetsCollector fc = new FacetsCollector();

    // MatchAllDocsQuery is for "browsing" (counts facets
    // for all non-deleted docs in the index); normally
    // you'd use a "normal" query:
    FacetsCollector.search(searcher, new MatchAllDocsQuery(), 10, fc);

    // Retrieve results
    Facets facets = new SortedSetDocValuesFacetCounts(state, fc);

    List<FacetResult> results = new ArrayList<>();
    results.add(facets.getTopChildren(10, "Author"));
    results.add(facets.getTopChildren(10, "Publish Year"));
    indexReader.close();

    return results;
}

From source file:com.czw.search.lucene.example.facet.SimpleSortedSetFacetsExample.java

License:Apache License

/**
 * User drills down on 'Publish Year/2010'.
 *///from w  w  w.  ja  v a  2  s. c o m
private FacetResult drillDown() throws IOException {
    DirectoryReader indexReader = DirectoryReader.open(indexDir);
    IndexSearcher searcher = new IndexSearcher(indexReader);
    SortedSetDocValuesReaderState state = new DefaultSortedSetDocValuesReaderState(indexReader);

    // Now user drills down on Publish Year/2010:
    DrillDownQuery q = new DrillDownQuery(config);
    q.add("Publish Year", "2010");
    FacetsCollector fc = new FacetsCollector();
    FacetsCollector.search(searcher, q, 10, fc);

    // Retrieve results
    Facets facets = new SortedSetDocValuesFacetCounts(state, fc);
    FacetResult result = facets.getTopChildren(10, "Author");
    indexReader.close();

    return result;
}

From source file:com.czw.search.lucene.example.xmlparser.FormBasedXmlQueryDemo.java

License:Apache License

private void openExampleIndex() throws IOException {
    //Create a RAM-based index from our test data file
    RAMDirectory rd = new RAMDirectory();
    IndexWriterConfig iwConfig = new IndexWriterConfig(analyzer);
    IndexWriter writer = new IndexWriter(rd, iwConfig);
    InputStream dataIn = getServletContext().getResourceAsStream("/WEB-INF/data.tsv");
    BufferedReader br = new BufferedReader(new InputStreamReader(dataIn, StandardCharsets.UTF_8));
    String line = br.readLine();/*w ww.  j a v a2  s .  com*/
    final FieldType textNoNorms = new FieldType(TextField.TYPE_STORED);
    textNoNorms.setOmitNorms(true);
    while (line != null) {
        line = line.trim();
        if (line.length() > 0) {
            //parse row and create a document
            StringTokenizer st = new StringTokenizer(line, "\t");
            Document doc = new Document();
            doc.add(new Field("location", st.nextToken(), textNoNorms));
            doc.add(new Field("salary", st.nextToken(), textNoNorms));
            doc.add(new Field("type", st.nextToken(), textNoNorms));
            doc.add(new Field("description", st.nextToken(), textNoNorms));
            writer.addDocument(doc);
        }
        line = br.readLine();
    }
    writer.close();

    //open searcher
    // this example never closes it reader!
    IndexReader reader = DirectoryReader.open(rd);
    searcher = new IndexSearcher(reader);
}

From source file:com.daniel.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.che.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 ww  . j a v  a2s  . 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);
    Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);

    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_40, 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();
}

From source file:com.dasasian.chok.lucene.DefaultSearcherFactory.java

License:Apache License

@Override
public IndexSearcher createSearcher(String shardName, File shardDir) throws IOException {
    return new IndexSearcher(FSDirectory.open(shardDir.getAbsoluteFile()));
}

From source file:com.dasasian.chok.lucene.integration.LuceneComplianceTest.java

License:Apache License

@Test
public void testScoreSort() throws Exception {
    // query and compare
    IndexSearcher indexSearcher = new IndexSearcher(FSDirectory.open(luceneIndex.getAbsoluteFile()));
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "0", null);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "1", null);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "2", null);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "15", null);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "23", null);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "2 23", null);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "nothing", null);
}

From source file:com.dasasian.chok.lucene.integration.LuceneComplianceTest.java

License:Apache License

@Test
public void testFieldSort() throws Exception {
    // query and compare (auto types)
    IndexSearcher indexSearcher = new IndexSearcher(FSDirectory.open(luceneIndex.getAbsoluteFile()));
    Sort sort = new Sort(new SortField[] { new SortField(FIELD_NAME, SortField.LONG) });
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "0", sort);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "1", sort);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "2", sort);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "15", sort);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "23", sort);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "2 23", sort);
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "nothing", sort);

    // check for explicit types
    sort = new Sort(new SortField[] { new SortField(FIELD_NAME, SortField.BYTE) });
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "1", sort);
    sort = new Sort(new SortField[] { new SortField(FIELD_NAME, SortField.INT) });
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "1", sort);
    sort = new Sort(new SortField[] { new SortField(FIELD_NAME, SortField.LONG) });
    checkQueryResults(indexSearcher, chokIndex.getName(), FIELD_NAME, "1", sort);
}