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:at.ac.univie.mminf.luceneSKOS.test.SKOSLabelFilterTest.java

License:Apache License

@Test
public void termQuerySearch() throws IOException {
    Document doc = new Document();
    doc.add(new Field("content", "The quick brown fox jumps over the lazy dog", TextField.TYPE_STORED));
    writer.addDocument(doc);/* w  ww  . j a  va2s .  co m*/
    searcher = new IndexSearcher(DirectoryReader.open(writer, false));
    TermQuery tq = new TermQuery(new Term("content", "hops"));
    assertEquals(1, searcher.search(tq, 1).totalHits);
}

From source file:at.ac.univie.mminf.luceneSKOS.test.SKOSLabelFilterTest.java

License:Apache License

@Test
public void phraseQuerySearch() throws IOException {
    Document doc = new Document();
    doc.add(new Field("content", "The quick brown fox jumps over the lazy dog", TextField.TYPE_STORED));
    writer.addDocument(doc);/*w  ww .  j  av a 2s  .  c o  m*/
    searcher = new IndexSearcher(DirectoryReader.open(writer, false));
    PhraseQuery.Builder builder = new PhraseQuery.Builder();
    builder.add(new Term("content", "fox")).add(new Term("content", "hops"));
    assertEquals(1, searcher.search(builder.build(), 1).totalHits);
}

From source file:at.ac.univie.mminf.luceneSKOS.test.SKOSLabelFilterTest.java

License:Apache License

@Test
public void queryParserSearch() throws IOException, QueryNodeException {
    Document doc = new Document();
    doc.add(new Field("content", "The quick brown fox jumps over the lazy dog", TextField.TYPE_STORED));
    writer.addDocument(doc);/*w w  w .j  a v a 2s.c o m*/
    searcher = new IndexSearcher(DirectoryReader.open(writer, false));
    Query query = new StandardQueryParser(skosAnalyzer).parse("\"fox jumps\"", "content");
    assertEquals(1, searcher.search(query, 1).totalHits);
    assertEquals("content:\"fox (jumps hops leaps)\"", query.toString());
    assertEquals("org.apache.lucene.search.MultiPhraseQuery", query.getClass().getName());
    query = new StandardQueryParser(new StandardAnalyzer()).parse("\"fox jumps\"", "content");
    assertEquals(1, searcher.search(query, 1).totalHits);
    assertEquals("content:\"fox jumps\"", query.toString());
    assertEquals("org.apache.lucene.search.PhraseQuery", query.getClass().getName());
}

From source file:at.ac.univie.mminf.luceneSKOS.test.SKOSLabelFilterTest.java

License:Apache License

@Test
public void testTermQuery() throws IOException, QueryNodeException {
    Document doc = new Document();
    doc.add(new Field("content", "I work for the united nations", TextField.TYPE_STORED));
    writer.addDocument(doc);//from   w  w w  .  j  a v  a 2s .c o  m
    searcher = new IndexSearcher(DirectoryReader.open(writer, false));
    StandardQueryParser parser = new StandardQueryParser(new SimpleAnalyzer());
    Query query = parser.parse("united nations", "content");
    assertEquals(1, searcher.search(query, 1).totalHits);
}

From source file:at.ac.univie.mminf.luceneSKOS.test.SKOSStandardQueryParserTest.java

License:Apache License

@Test
public void queryParserSearch() throws IOException, QueryNodeException {

    Document doc = new Document();
    doc.add(new Field("content", "The quick brown fox jumps over the lazy dog", TextField.TYPE_STORED));

    writer.addDocument(doc);// w  w w  . j  ava  2s  . c  o m

    searcher = new IndexSearcher(DirectoryReader.open(writer, false));

    Query query = new SKOSStandardQueryParser(skosAnalyzer).parse("\"fox jumps\"", "content");

    assertEquals(1, searcher.search(query, 1).totalHits);

    assertEquals("content:\"fox (jumps hops leaps)\"", query.toString());
    assertEquals("org.apache.lucene.search.MultiPhraseQuery", query.getClass().getName());

    query = new StandardQueryParser(new StandardAnalyzer()).parse("\"fox jumps\"", "content");
    assertEquals(1, searcher.search(query, 1).totalHits);

    assertEquals("content:\"fox jumps\"", query.toString());
    assertEquals("org.apache.lucene.search.PhraseQuery", query.getClass().getName());

}

From source file:at.ac.univie.mminf.luceneSKOS.test.SKOSStandardQueryParserTest.java

License:Apache License

@Test
public void queryParserSearchWithBoosts() throws IOException, QueryNodeException {

    Document doc = new Document();
    doc.add(new Field("content", "The quick brown fox jumps over the lazy dog", TextField.TYPE_STORED));

    writer.addDocument(doc);/*from w  w w  . j av a  2 s.co m*/

    searcher = new IndexSearcher(DirectoryReader.open(writer, false));

    SKOSStandardQueryParser parser = new SKOSStandardQueryParser(skosAnalyzer);
    parser.setBoost(SKOSType.ALT, 0.5f);

    Query query = parser.parse("\"fox jumps\"", "content");

    assertEquals(1, searcher.search(query, 1).totalHits);

    // boosts do not work in phrase queries
    assertEquals("content:\"fox (jumps hops leaps)\"", query.toString());
    assertEquals("org.apache.lucene.search.MultiPhraseQuery", query.getClass().getName());

    query = parser.parse("fox jumps", "content");

    assertEquals(1, searcher.search(query, 1).totalHits);

    assertEquals("content:fox (content:jumps content:hops^0.5 content:leaps^0.5)", query.toString());
    assertEquals("org.apache.lucene.search.BooleanQuery", query.getClass().getName());

    query = new SKOSStandardQueryParser(new StandardAnalyzer()).parse("fox jumps", "content");
    assertEquals(1, searcher.search(query, 1).totalHits);

    assertEquals("content:fox content:jumps", query.toString());
    assertEquals("org.apache.lucene.search.BooleanQuery", query.getClass().getName());

}

From source file:at.ac.univie.mminf.luceneSKOS.test.SKOSURIFilterTest.java

License:Apache License

@Test
public void singleUriExpansionWithStoredField() throws IOException {
    Document doc = new Document();
    doc.add(new Field("subject", "http://example.com/concept/1", TextField.TYPE_STORED));
    writer.addDocument(doc);//from ww  w .  j a v  a2 s. c o m
    searcher = new IndexSearcher(DirectoryReader.open(writer, false));
    Query query = new TermQuery(new Term("subject", "leaps"));
    TopDocs results = searcher.search(query, 10);
    assertEquals(1, results.totalHits);

    Document indexDoc = searcher.doc(results.scoreDocs[0].doc);
    String[] fieldValues = indexDoc.getValues("subject");
    assertEquals(1, fieldValues.length);
    assertEquals(fieldValues[0], "http://example.com/concept/1");
}

From source file:at.ac.univie.mminf.luceneSKOS.test.SKOSURIFilterTest.java

License:Apache License

@Test
public void singleUriExpansionWithUnstoredField() throws IOException {
    Document doc = new Document();
    doc.add(new Field("subject", "http://example.com/concept/1", TextField.TYPE_NOT_STORED));
    writer.addDocument(doc);// w  w w .j av a2  s  .  c o m
    searcher = new IndexSearcher(DirectoryReader.open(writer, false));
    Query query = new TermQuery(new Term("subject", "jumps"));
    TopDocs results = searcher.search(query, 10);
    assertEquals(1, results.totalHits);

    Document indexDoc = searcher.doc(results.scoreDocs[0].doc);
    String[] fieldValues = indexDoc.getValues("subject");
    assertEquals(0, fieldValues.length);
}

From source file:at.ac.univie.mminf.luceneSKOS.test.SKOSURIFilterTest.java

License:Apache License

@Test
public void multipleURIExpansion() throws IOException {
    Document doc = new Document();
    doc.add(new Field("subject", "http://example.com/concept/1", TextField.TYPE_STORED));
    doc.add(new Field("subject", "http://example.com/concept/2", TextField.TYPE_STORED));
    writer.addDocument(doc);//from   www  .ja va2  s.c om
    searcher = new IndexSearcher(DirectoryReader.open(writer, false));

    // querying for alternative term of concept 1
    Query query = new TermQuery(new Term("subject", "hops"));
    TopDocs results = searcher.search(query, 10);
    assertEquals(1, results.totalHits);
    Document indexDoc = searcher.doc(results.scoreDocs[0].doc);
    String[] fieldValues = indexDoc.getValues("subject");
    assertEquals(2, fieldValues.length);

    // querying for alternative term of concept 2
    query = new TermQuery(new Term("subject", "speedy"));
    results = searcher.search(query, 10);
    assertEquals(1, results.totalHits);

    indexDoc = searcher.doc(results.scoreDocs[0].doc);
    fieldValues = indexDoc.getValues("subject");
    assertEquals(2, fieldValues.length);
}

From source file:at.ac.univie.mminf.luceneSKOS.test.termexpansion.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./*  w ww .  j ava2 s  .c o m*/
 * <p/>
 * 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 IOException {

    /* defining the document to be indexed */
    Document doc = new Document();
    doc.add(new Field("title", "Spearhead", TextField.TYPE_STORED));
    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).",
            TextField.TYPE_NOT_STORED));
    doc.add(new Field("subject", "weapons", TextField.TYPE_NOT_STORED));

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

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

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

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

    TopDocs results = searcher.search(builder.build(), 10);

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