Example usage for org.apache.lucene.index DirectoryReader open

List of usage examples for org.apache.lucene.index DirectoryReader open

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Introduction

In this page you can find the example usage for org.apache.lucene.index DirectoryReader open.

Prototype

public static DirectoryReader open(final IndexCommit commit) throws IOException

Source Link

Document

Expert: returns an IndexReader reading the index in the given IndexCommit .

Usage

From source file:dcu.com.ie.patent.queryreduction.PatentMagdyQueryReduction.java

License:Apache License

public PatentMagdyQueryReduction(String indexDir, String model, int Nbr_Docs, int Nbr_Terms, int source)
        throws IOException, Exception {
    Directory dir = FSDirectory.open(new File(indexDir));
    searcher = new IndexSearcher(DirectoryReader.open(dir));
    this.model = model;
    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!");
    }/*from  w w  w .  j ava  2  s .  co  m*/
}

From source file:de.anycook.db.lucene.FulltextIndex.java

License:Open Source License

private boolean checkIfRecipeExists(String recipeName) throws IOException {
    try (IndexReader reader = DirectoryReader.open(index)) {
        IndexSearcher searcher = new IndexSearcher(reader);
        MultiFieldQueryParser.parse(new String[] { recipeName }, new String[] { "title" }, analyzer);
        Query query = new QueryParser("title", analyzer).parse(recipeName);
        TopDocs topdocs = searcher.search(query, 1);
        if (topdocs.totalHits > 0) {
            return true;
        }/*  w ww . j  a  v  a  2  s  .  com*/
    } catch (CorruptIndexException | ParseException e) {
        throw new IOException(e);
    }

    return false;
}

From source file:de.anycook.db.lucene.FulltextIndex.java

License:Open Source License

public Set<String> search(String q) throws IOException {
    Set<String> recipes = new LinkedHashSet<>();
    String fields[] = new String[] { "description", "steps" };
    logger.debug(String.format("searching for %s", q));

    try (IndexReader reader = DirectoryReader.open(index)) {
        int hitsPerPage = 1000;
        IndexSearcher searcher = new IndexSearcher(reader);
        Query query = new MultiFieldQueryParser(fields, analyzer).parse(q);
        TopScoreDocCollector collector = TopScoreDocCollector.create(hitsPerPage, null);
        searcher.search(query, collector);

        ScoreDoc[] hits = collector.topDocs().scoreDocs;
        for (ScoreDoc hit : hits) {
            Document d = searcher.doc(hit.doc);
            recipes.add(d.get("title"));
        }//from  w w  w  .j  a va 2 s .c  om

    } catch (CorruptIndexException | ParseException e) {
        logger.error(e);
    }

    logger.debug(String.format("found %d results", recipes.size()));
    return recipes;
}

From source file:de.blizzy.documentr.search.AllDocIdsCollectorTest.java

License:Open Source License

@Before
public void setUp() throws IOException {
    directory = new RAMDirectory();

    StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);
    IndexWriterConfig writerConfig = new IndexWriterConfig(Version.LUCENE_40, analyzer);
    writerConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
    IndexWriter writer = new IndexWriter(directory, writerConfig);
    writer.addDocument(createDocument());
    writer.addDocument(createDocument());
    writer.addDocument(createDocument());
    writer.commit();//from   www .ja v  a 2 s  .  co m
    writer.close(true);

    reader = DirectoryReader.open(directory);
}

From source file:de.blizzy.documentr.search.GetSearchHitTaskTest.java

License:Open Source License

@Before
public void setUp() throws IOException {
    directory = new RAMDirectory();

    StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);
    IndexWriterConfig writerConfig = new IndexWriterConfig(Version.LUCENE_40, analyzer);
    writerConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
    IndexWriter writer = new IndexWriter(directory, writerConfig);
    writer.addDocument(createDocument("project", "branch", "home", //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
            new String[] { "tag1", "tag2" }, //$NON-NLS-1$ //$NON-NLS-2$
            "title", "some text")); //$NON-NLS-1$ //$NON-NLS-2$
    writer.commit();//from  w w  w  .  j a  v a  2s . co m
    writer.close(true);

    reader = DirectoryReader.open(directory);

    Query query = new TermQuery(new Term("text", "some")); //$NON-NLS-1$ //$NON-NLS-2$
    task = new GetSearchHitTask(query, reader, 0, analyzer);
}

From source file:de.blizzy.documentr.search.InaccessibleDocIdsCollectorTest.java

License:Open Source License

@Before
public void setUp() throws IOException {
    directory = new RAMDirectory();

    StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);
    IndexWriterConfig writerConfig = new IndexWriterConfig(Version.LUCENE_40, analyzer);
    writerConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
    IndexWriter writer = new IndexWriter(directory, writerConfig);
    writer.addDocument(createDocument("project", "branch1", "home")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
    writer.addDocument(createDocument("project", "branch2", "home")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
    writer.commit();/* w ww .jav a  2 s  .c o m*/
    writer.close(true);

    reader = DirectoryReader.open(directory);

    collector = new InaccessibleDocIdsCollector(Permission.VIEW, authentication, permissionEvaluator);
}

From source file:de.blizzy.documentr.search.PagePermissionFilterTest.java

License:Open Source License

@Before
public void setUp() throws IOException {
    directory = new RAMDirectory();

    StandardAnalyzer analyzer = new StandardAnalyzer(Version.LUCENE_40);
    IndexWriterConfig writerConfig = new IndexWriterConfig(Version.LUCENE_40, analyzer);
    writerConfig.setOpenMode(OpenMode.CREATE_OR_APPEND);
    IndexWriter writer = new IndexWriter(directory, writerConfig);
    writer.addDocument(createDocument("project", "branch1", "home")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
    writer.addDocument(createDocument("project", "branch2", "home")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
    writer.commit();//from  w w  w.  java2s  . c  o m
    writer.close(true);

    reader = DirectoryReader.open(directory);

    BitSet docs = new BitSet();
    docs.set(1);
    Bits docIds = new DocIdBitSet(docs);
    filter = new PagePermissionFilter(docIds);
}

From source file:de.citec.lucene.SearchIndex.java

public SearchIndex(String pathToIndex, Language input_language) throws IOException {
    if (input_language.equals(DE))
        this.analyzer = new GermanAnalyzer();
    if (input_language.equals(EN))
        this.analyzer = new EnglishAnalyzer();
    this.language = input_language;
    this.reader = DirectoryReader.open(FSDirectory.open(Paths.get(pathToIndex)));
    this.searcher = new IndexSearcher(reader);

}

From source file:de.csw.linkgenerator.plugin.lucene.IndexUpdater.java

License:Open Source License

/**
 * Opens the index reader and searcher used for finding and deleting old versions of indexed
 * documents.//from   ww  w. j  a v a2  s.c  o m
 */
private synchronized void openSearcher() {
    try {
        this.reader = DirectoryReader.open(this.indexDir);
        this.searcher = new IndexSearcher(this.reader);
    } catch (IOException e) {
        LOG.error("error opening index searcher", e);
    }
}

From source file:de.csw.linkgenerator.plugin.lucene.LucenePlugin.java

License:Open Source License

/**
 * Creates an array of Searchers for a number of lucene indexes.
 * // w w  w .j ava 2 s  .  c o  m
 * @param indexDirs Comma separated list of Lucene index directories to create searchers for.
 * @return Array of searchers
 */
public IndexSearcher[] createSearchers(String indexDirs) throws Exception {
    String[] dirPaths = StringUtils.split(indexDirs, ",");
    NIOFSDirectory[] dirs = new NIOFSDirectory[dirPaths.length];
    for (int i = 0; i < dirPaths.length; i++) {
        dirs[i] = new NIOFSDirectory(new File(dirPaths[i]));
    }
    List<IndexSearcher> searchersList = new ArrayList<IndexSearcher>();
    for (int i = 0; i < dirs.length; i++) {
        try {
            if (!DirectoryReader.indexExists(dirs[i])) {
                // If there's no index there, create an empty one; otherwise the reader
                // constructor will throw an exception and fail to initialize
                IndexWriterConfig conf = new IndexWriterConfig(Version.LUCENE_40, analyzer);
                new IndexWriter(dirs[i], conf).close();
            }
            DirectoryReader reader = DirectoryReader.open(dirs[i]);
            searchersList.add(new IndexSearcher(reader));
        } catch (IOException e) {
            LOG.error("cannot open index " + dirs[i], e);
        }
    }

    return searchersList.toArray(new IndexSearcher[searchersList.size()]);
}