Example usage for org.apache.lucene.store RAMDirectory RAMDirectory

Introduction

In this page you can find the example usage for org.apache.lucene.store RAMDirectory RAMDirectory.

Prototype

public RAMDirectory() 

Source Link

Document

Constructs an empty Directory .

Usage

From source file:aos.lucene.search.msc.PhraseQueryTest.java

License:Apache License

protected void setUp() throws IOException {
    dir = new RAMDirectory();
    IndexWriter writer = new IndexWriter(dir, new WhitespaceAnalyzer(Version.LUCENE_46),
            IndexWriter.MaxFieldLength.UNLIMITED);
    Document doc = new Document();
    doc.add(new Field("field", "the quick brown fox jumped over the lazy dog", Field.Store.YES,
            Field.Index.ANALYZED));
    writer.addDocument(doc);/*ww w  .  ja v  a  2 s. c o  m*/
    writer.close();

    searcher = new IndexSearcher(dir);
}

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From source file:aos.lucene.search.msc.ScoreTest.java

License:Apache License

public void setUp() throws Exception {
    directory = new RAMDirectory();
}

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From source file:aos.lucene.tools.ChainedFilterTest.java

License:Apache License

@Override
public void setUp() throws Exception {

    directory = new RAMDirectory();

    IndexWriter writer = new IndexWriter(directory, new WhitespaceAnalyzer(Version.LUCENE_46),
            IndexWriter.MaxFieldLength.UNLIMITED);

    Calendar cal = Calendar.getInstance();
    cal.set(2009, 1, 1, 0, 0);//from w  w  w  .ja  v  a 2  s.  co  m

    for (int i = 0; i < MAX; i++) {
        Document doc = new Document();
        doc.add(new Field("key", "" + (i + 1), Field.Store.YES, Field.Index.NOT_ANALYZED));
        doc.add(new Field("owner", (i < MAX / 2) ? "bob" : "sue", Field.Store.YES, Field.Index.NOT_ANALYZED));
        doc.add(new Field("date", DateTools.timeToString(cal.getTimeInMillis(), DateTools.Resolution.DAY),
                Field.Store.YES, Field.Index.NOT_ANALYZED));
        writer.addDocument(doc);

        cal.add(Calendar.DATE, 1);
    }

    writer.close();

    searcher = new IndexSearcher(directory);

    BooleanQuery bq = new BooleanQuery();
    bq.add(new TermQuery(new Term("owner", "bob")), BooleanClause.Occur.SHOULD);
    bq.add(new TermQuery(new Term("owner", "sue")), BooleanClause.Occur.SHOULD);
    query = bq;

    cal.set(2099, 1, 1, 0, 0);
    dateFilter = TermRangeFilter.Less("date",
            DateTools.timeToString(cal.getTimeInMillis(), DateTools.Resolution.DAY));// C

    bobFilter = new CachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("owner", "bob"))));

    sueFilter = new CachingWrapperFilter(new QueryWrapperFilter(new TermQuery(new Term("owner", "sue"))));
}

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From source file:aos.lucene.tools.SpatialLuceneExample.java

License:Apache License

SpatialLuceneExample() throws IOException {
    directory = new RAMDirectory();
    writer = new IndexWriter(directory, new WhitespaceAnalyzer(Version.LUCENE_46), MaxFieldLength.UNLIMITED);
}

---

From source file:arena.lucene.LuceneDirectoryBean.java

License:Open Source License

public void afterPropertiesSet() throws Exception {
    boolean initialize = false;
    if (this.location == null) {
        this.directory = new RAMDirectory();
        initialize = true;//  w  ww  . j  ava  2  s. c  o m
    } else {
        File dir = new File(this.servletContext != null ? this.servletContext.getRealPath(location) : location);
        if (!dir.isDirectory()) {
            dir.mkdirs();
        }
        LockFactory lf = (this.disableLocks ? NoLockFactory.getNoLockFactory() : null);
        this.directory = FSDirectory.open(dir, lf);
        log.info("Using lucene directory: file=" + dir + " instance=" + this.directory.toString());
        initialize = (this.initializeIndexIfNew && dir.listFiles().length == 0);
    }

    if (initialize) {
        // create a dummy writer to initialize the index
        IndexWriter writer = null;
        try {
            writer = new IndexWriter(this.directory, new StandardAnalyzer(Version.LUCENE_30), true,
                    MaxFieldLength.LIMITED);
        } finally {
            if (writer != null) {
                writer.close();
            }
        }
    }
}

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From source file:at.ac.univie.mminf.luceneSKOS.AbstractTermExpansionTest.java

License:Apache License

/**
 * This test indexes a sample metadata record (=lucene document) having a
 * "title", "description", and "subject" field, which contains plain subject
 * terms.//from   w  ww  .ja  v  a 2  s.com
 * 
 * A search for "arms" doesn't return that record because the term "arms" is
 * not explicitly contained in the record (document).
 * 
 * @throws IOException
 * @throws LockObtainFailedException
 * @throws CorruptIndexException
 */
@Test
public void noExpansion() throws CorruptIndexException, LockObtainFailedException, IOException {

    /* defining the document to be indexed */
    Document doc = new Document();
    doc.add(new Field("title", "Spearhead", Field.Store.YES, Field.Index.ANALYZED));
    doc.add(new Field("description",
            "Roman iron spearhead. The spearhead was attached to one end of a wooden shaft..."
                    + "The spear was mainly a thrusting weapon, but could also be thrown. "
                    + "It was the principal weapon of the auxiliary soldier... "
                    + "(second - fourth century, Arbeia Roman Fort).",
            Field.Store.NO, Field.Index.ANALYZED));
    doc.add(new Field("subject", "weapons", Field.Store.NO, Field.Index.ANALYZED));

    /* setting up a writer with a default (simple) analyzer */
    writer = new IndexWriter(new RAMDirectory(),
            new IndexWriterConfig(Version.LUCENE_36, new SimpleAnalyzer(Version.LUCENE_36)));

    /* adding the document to the index */
    writer.addDocument(doc);

    /* defining a query that searches over all fields */
    BooleanQuery query = new BooleanQuery();
    query.add(new TermQuery(new Term("title", "arms")), BooleanClause.Occur.SHOULD);
    query.add(new TermQuery(new Term("description", "arms")), BooleanClause.Occur.SHOULD);
    query.add(new TermQuery(new Term("subject", "arms")), BooleanClause.Occur.SHOULD);

    /* creating a new searcher */
    searcher = new IndexSearcher(IndexReader.open(writer, false));

    TopDocs results = searcher.search(query, 10);

    /* no results are returned since there is no term match */
    Assert.assertEquals(0, results.totalHits);

}

---

From source file:at.ac.univie.mminf.luceneSKOS.analysis.AbstractFilterTest.java

License:Apache License

@Before
protected void setUp() throws Exception {

    // adding some test data
    skosEngine = new SKOSEngineMock();

    skosEngine.addEntry("http://example.com/concept/1", SKOSType.PREF, "jumps");
    skosEngine.addEntry("http://example.com/concept/1", SKOSType.ALT, "leaps", "hops");

    skosEngine.addEntry("http://example.com/concept/2", SKOSType.PREF, "quick");
    skosEngine.addEntry("http://example.com/concept/2", SKOSType.ALT, "fast", "speedy");

    skosEngine.addEntry("http://example.com/concept/3", SKOSType.PREF, "over");
    skosEngine.addEntry("http://example.com/concept/3", SKOSType.ALT, "above");

    skosEngine.addEntry("http://example.com/concept/4", SKOSType.PREF, "lazy");
    skosEngine.addEntry("http://example.com/concept/4", SKOSType.ALT, "apathic", "sluggish");

    skosEngine.addEntry("http://example.com/concept/5", SKOSType.PREF, "dog");
    skosEngine.addEntry("http://example.com/concept/5", SKOSType.ALT, "canine", "pooch");

    skosEngine.addEntry("http://example.com/concept/6", SKOSType.PREF, "united nations");
    skosEngine.addEntry("http://example.com/concept/6", SKOSType.ALT, "UN");

    skosEngine.addEntry("http://example.com/concept/7", SKOSType.PREF, "lazy dog");
    skosEngine.addEntry("http://example.com/concept/7", SKOSType.ALT, "Odie");

    directory = new RAMDirectory();

}

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From source file:at.ac.univie.mminf.luceneSKOS.analysis.engine.jena.SKOSEngineImpl.java

License:Apache License

/**
 * This constructor loads the SKOS model from a given InputStream using the
 * given serialization language parameter, which must be either N3, RDF/XML,
 * or TURTLE./*from   w w w  .j a v a2s.c  o m*/
 *
 * @param inputStream the input stream
 * @param lang the serialization language
 * @throws IOException if the model cannot be loaded
 */
public SKOSEngineImpl(InputStream inputStream, String lang) throws IOException {
    if (!("N3".equals(lang) || "RDF/XML".equals(lang) || "TURTLE".equals(lang))) {
        throw new IOException("Invalid RDF serialization format");
    }
    this.analyzer = new SimpleAnalyzer();
    this.skosModel = ModelFactory.createDefaultModel();
    skosModel.read(inputStream, null, lang);
    indexDir = new RAMDirectory();
    entailSKOSModel();
    indexSKOSModel();
    searcher = new IndexSearcher(DirectoryReader.open(indexDir));
}

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From source file:at.ac.univie.mminf.luceneSKOS.analysis.engine.jena.SKOSEngineImpl.java

License:Apache License

/**
 * This constructor loads the SKOS model from a given InputStream using the
 * given serialization language parameter, which must be either N3, RDF/XML,
 * or TURTLE.//w w w. ja  va2  s . com
 *
 * @param inputStream the input stream
 * @param format the serialization language
 * @param languages the languages
 * @throws IOException if the model cannot be loaded
 */
public SKOSEngineImpl(InputStream inputStream, String format, List<String> languages) throws IOException {
    if (!("N3".equals(format) || "RDF/XML".equals(format) || "TURTLE".equals(format))) {
        throw new IOException("Invalid RDF serialization format");
    }
    if (languages != null) {
        this.languages = new TreeSet<>(languages);
    }
    analyzer = new SimpleAnalyzer();
    skosModel = ModelFactory.createDefaultModel();
    skosModel.read(inputStream, null, format);
    indexDir = new RAMDirectory();
    entailSKOSModel();
    indexSKOSModel();
    searcher = new IndexSearcher(DirectoryReader.open(indexDir));
}

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From source file:at.ac.univie.mminf.luceneSKOS.LabelbasedTermExpansionTest.java

License:Apache License

/**
 * This test indexes a sample metadata record (=lucene document) having a
 * "title", "description", and "subject" field.
 * /*from   www  .ja v  a2  s. c  o  m*/
 * A search for "arms" returns that record as a result because "arms" is
 * defined as an alternative label for "weapons", the term which is contained
 * in the subject field.
 * 
 * @throws IOException
 */
@Test
public void labelBasedTermExpansion() throws IOException {

    /* defining the document to be indexed */
    Document doc = new Document();
    doc.add(new Field("title", "Spearhead", Field.Store.YES, Field.Index.ANALYZED));
    doc.add(new Field("description",
            "Roman iron spearhead. The spearhead was attached to one end of a wooden shaft..."
                    + "The spear was mainly a thrusting weapon, but could also be thrown. "
                    + "It was the principal weapon of the auxiliary soldier... "
                    + "(second - fourth century, Arbeia Roman Fort).",
            Field.Store.NO, Field.Index.ANALYZED));
    doc.add(new Field("subject", "weapons", Field.Store.NO, Field.Index.ANALYZED));

    /* setting up the SKOS analyzer */
    String skosFile = "src/test/resources/skos_samples/ukat_examples.n3";

    /* ExpansionType.URI->the field to be analyzed (expanded) contains URIs */
    Analyzer skosAnalyzer = new SKOSAnalyzer(matchVersion, skosFile, ExpansionType.LABEL);

    /* Define different analyzers for different fields */
    Map<String, Analyzer> analyzerPerField = new HashMap<String, Analyzer>();
    analyzerPerField.put("subject", skosAnalyzer);
    PerFieldAnalyzerWrapper indexAnalyzer = new PerFieldAnalyzerWrapper(new SimpleAnalyzer(matchVersion),
            analyzerPerField);

    /* setting up a writer with a default (simple) analyzer */
    writer = new IndexWriter(new RAMDirectory(), new IndexWriterConfig(matchVersion, indexAnalyzer));

    /* adding the document to the index */
    writer.addDocument(doc);

    /* defining a query that searches over all fields */
    BooleanQuery query1 = new BooleanQuery();
    query1.add(new TermQuery(new Term("title", "arms")), BooleanClause.Occur.SHOULD);
    query1.add(new TermQuery(new Term("description", "arms")), BooleanClause.Occur.SHOULD);
    query1.add(new TermQuery(new Term("subject", "arms")), BooleanClause.Occur.SHOULD);

    /* creating a new searcher */
    searcher = new IndexSearcher(IndexReader.open(writer, false));

    TopDocs results = searcher.search(query1, 10);

    /* the document matches because "arms" is among the expanded terms */
    Assert.assertEquals(1, results.totalHits);

    /* defining a query that searches for a broader concept */
    Query query2 = new TermQuery(new Term("subject", "military equipment"));

    results = searcher.search(query2, 10);

    /* ... also returns the document as result */
    Assert.assertEquals(1, results.totalHits);

}

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