Example usage for org.apache.lucene.index SlowCodecReaderWrapper wrap

Introduction

In this page you can find the example usage for org.apache.lucene.index SlowCodecReaderWrapper wrap.

Prototype

public static CodecReader wrap(final LeafReader reader) throws IOException 

Source Link

Document

Returns a CodecReader view of reader.

Usage

From source file:io.anserini.integration.IndexerTest.java

License:Apache License

@Test
public void testCloneIndex() throws Exception {
    System.out.println("Cloning index:");
    Directory dir1 = FSDirectory.open(tempDir1);
    IndexReader reader = DirectoryReader.open(dir1);

    Directory dir2 = FSDirectory.open(tempDir2);
    IndexWriterConfig config = new IndexWriterConfig(new EnglishAnalyzer());
    config.setOpenMode(IndexWriterConfig.OpenMode.CREATE);
    IndexWriter writer = new IndexWriter(dir2, config);

    LeafReader leafReader = reader.leaves().get(0).reader();
    CodecReader codecReader = SlowCodecReaderWrapper.wrap(leafReader);
    writer.addIndexes(new MyFilterCodecReader(codecReader));
    writer.commit();/*from  w  w w .  ja v  a2s . c  om*/
    writer.forceMerge(1);
    writer.close();

    reader.close();

    // Open up the cloned index and verify it.
    reader = DirectoryReader.open(dir2);
    assertEquals(3, reader.numDocs());
    assertEquals(1, reader.leaves().size());

    System.out.println("Dumping out postings...");
    dumpPostings(reader);

    assertEquals(2, reader.docFreq(new Term("text", "here")));
    assertEquals(2, reader.docFreq(new Term("text", "more")));
    assertEquals(1, reader.docFreq(new Term("text", "some")));
    assertEquals(1, reader.docFreq(new Term("text", "test")));
    assertEquals(2, reader.docFreq(new Term("text", "text")));

    reader.close();
}

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