Example usage for org.apache.lucene.index PointValues getMinPackedValue

Introduction

In this page you can find the example usage for org.apache.lucene.index PointValues getMinPackedValue.

Prototype

public abstract byte[] getMinPackedValue() throws IOException;

Source Link

Document

Returns minimum value for each dimension, packed, or null if #size is 0

Usage

From source file:org.elasticsearch.xpack.core.security.authz.accesscontrol.FieldSubsetReaderTests.java

License:Open Source License

/**
 * test filtering two int points//from w  w w  .  j a  va 2 s  .c  o m
 */
public void testPoints() throws Exception {
    Directory dir = newDirectory();
    IndexWriterConfig iwc = new IndexWriterConfig(null);
    IndexWriter iw = new IndexWriter(dir, iwc);

    // add document with 2 points
    Document doc = new Document();
    doc.add(new IntPoint("fieldA", 1));
    doc.add(new IntPoint("fieldB", 2));
    iw.addDocument(doc);

    // open reader
    DirectoryReader ir = FieldSubsetReader.wrap(DirectoryReader.open(iw),
            new CharacterRunAutomaton(Automata.makeString("fieldA")));

    // see only one field
    LeafReader segmentReader = ir.leaves().get(0).reader();
    PointValues points = segmentReader.getPointValues("fieldA");
    assertNull(segmentReader.getPointValues("fieldB"));

    // size statistic
    assertEquals(1, points.size());

    // doccount statistic
    assertEquals(1, points.getDocCount());

    // min statistic
    assertNotNull(points.getMinPackedValue());

    // max statistic
    assertNotNull(points.getMaxPackedValue());

    // bytes per dimension
    assertEquals(Integer.BYTES, points.getBytesPerDimension());

    // number of dimensions
    assertEquals(1, points.getNumDimensions());

    // walk the trees: we should see stuff in fieldA
    AtomicBoolean sawDoc = new AtomicBoolean(false);
    points.intersect(new IntersectVisitor() {
        @Override
        public void visit(int docID) throws IOException {
            throw new IllegalStateException("should not get here");
        }

        @Override
        public void visit(int docID, byte[] packedValue) throws IOException {
            sawDoc.set(true);
        }

        @Override
        public Relation compare(byte[] minPackedValue, byte[] maxPackedValue) {
            return Relation.CELL_CROSSES_QUERY;
        }
    });
    assertTrue(sawDoc.get());

    TestUtil.checkReader(ir);
    IOUtils.close(ir, iw, dir);
}

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