Examples with HllSketch com.yahoo.sketches.hll.HllSketch used on opensource projects

Example 41 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class SketchToStringTest method normalCase.

@Test
public void normalCase() throws Exception {
    EvalFunc<String> func = new SketchToString();
    HllSketch sketch = new HllSketch(12);
    String result = func.exec(tupleFactory.newTuple(new DataByteArray(sketch.toCompactByteArray())));
    Assert.assertNotNull(result);
    Assert.assertTrue(result.length() > 0);
}

Example 42 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method algebraicFinalEmptyInputTuple.

@Test
public void algebraicFinalEmptyInputTuple() throws Exception {
    @SuppressWarnings("unchecked") EvalFunc<DataByteArray> func = (EvalFunc<DataByteArray>) Class.forName(new UnionSketch().getFinal()).getConstructor(String.class).newInstance("10");
    DataByteArray result = func.exec(tupleFactory.newTuple());
    HllSketch sketch = DataToSketchTest.getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
    Assert.assertEquals(sketch.getLgConfigK(), 10);
}

Example 43 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method execEmptyInputTuple.

@Test
public void execEmptyInputTuple() throws Exception {
    EvalFunc<DataByteArray> func = new UnionSketch("10");
    DataByteArray result = func.exec(tupleFactory.newTuple());
    HllSketch sketch = DataToSketchTest.getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
    Assert.assertEquals(sketch.getLgConfigK(), 10);
}

Example 44 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method execNormalCase.

@Test
public void execNormalCase() throws Exception {
    EvalFunc<DataByteArray> func = new UnionSketch();
    HllSketch inputSketch = new HllSketch(12);
    inputSketch.update(1);
    inputSketch.update(2);
    DataBag bag = bagFactory.newDefaultBag();
    bag.add(tupleFactory.newTuple(new DataByteArray(inputSketch.toCompactByteArray())));
    DataByteArray result = func.exec(tupleFactory.newTuple(bag));
    HllSketch sketch = DataToSketchTest.getSketch(result);
    Assert.assertFalse(sketch.isEmpty());
    Assert.assertEquals(sketch.getEstimate(), 2.0, 0.01);
}

Example 45 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method accumulator.

@Test
public void accumulator() throws Exception {
    Accumulator<DataByteArray> func = new UnionSketch();
    // no input yet
    DataByteArray result = func.getValue();
    HllSketch sketch = DataToSketchTest.getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
    // null input tuple
    func.accumulate(null);
    result = func.getValue();
    sketch = DataToSketchTest.getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
    // empty input tuple
    func.accumulate(tupleFactory.newTuple());
    result = func.getValue();
    sketch = DataToSketchTest.getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
    // empty bag
    func.accumulate(tupleFactory.newTuple(bagFactory.newDefaultBag()));
    result = func.getValue();
    sketch = DataToSketchTest.getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
    // normal case
    HllSketch inputSketch = new HllSketch(12);
    inputSketch.update(1);
    inputSketch.update(2);
    DataBag bag = bagFactory.newDefaultBag();
    bag.add(tupleFactory.newTuple(new DataByteArray(inputSketch.toCompactByteArray())));
    func.accumulate(tupleFactory.newTuple(bag));
    result = func.getValue();
    sketch = DataToSketchTest.getSketch(result);
    Assert.assertFalse(sketch.isEmpty());
    Assert.assertEquals(sketch.getEstimate(), 2.0, 0.01);
    // cleanup
    func.cleanup();
    result = func.getValue();
    sketch = DataToSketchTest.getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
}