| /* |
| * Copyright 2016, Yahoo! Inc. |
| * Licensed under the terms of the Apache License 2.0. See LICENSE file at the project root for terms. |
| */ |
| package com.yahoo.sketches.pig.quantiles; |
| |
| import java.util.Comparator; |
| |
| import org.apache.pig.Accumulator; |
| import org.apache.pig.EvalFunc; |
| import org.apache.pig.data.BagFactory; |
| import org.apache.pig.data.DataBag; |
| import org.apache.pig.data.DataByteArray; |
| import org.apache.pig.data.DataType; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.data.TupleFactory; |
| import org.apache.pig.impl.logicalLayer.schema.Schema; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| import com.yahoo.memory.Memory; |
| import com.yahoo.sketches.ArrayOfItemsSerDe; |
| import com.yahoo.sketches.ArrayOfStringsSerDe; |
| import com.yahoo.sketches.quantiles.ItemsSketch; |
| |
| public class DataToStringsSketchTest { |
| |
| private static final TupleFactory TUPLE_FACTORY = TupleFactory.getInstance(); |
| private static final BagFactory BAG_FACTORY = BagFactory.getInstance(); |
| |
| private static final Comparator<String> COMPARATOR = Comparator.naturalOrder(); |
| private static final ArrayOfItemsSerDe<String> SER_DE = new ArrayOfStringsSerDe(); |
| |
| @Test |
| public void execNullInputTuple() throws Exception { |
| EvalFunc<Tuple> func = new DataToStringsSketch(); |
| Tuple resultTuple = func.exec(null); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| } |
| |
| @Test |
| public void execEmptyInputTuple() throws Exception { |
| EvalFunc<Tuple> func = new DataToStringsSketch(); |
| Tuple resultTuple = func.exec(TUPLE_FACTORY.newTuple()); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| } |
| |
| @Test |
| public void execEmptyBag() throws Exception { |
| EvalFunc<Tuple> func = new DataToStringsSketch(); |
| Tuple resultTuple = func.exec(TUPLE_FACTORY.newTuple(BAG_FACTORY.newDefaultBag())); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| } |
| |
| @Test(expectedExceptions = ClassCastException.class) |
| public void execWrongValueType() throws Exception { |
| EvalFunc<Tuple> func = new DataToStringsSketch(); |
| DataBag bag = BAG_FACTORY.newDefaultBag(); |
| bag.add(TUPLE_FACTORY.newTuple(1.0)); |
| func.exec(TUPLE_FACTORY.newTuple(bag)); |
| } |
| |
| @Test |
| public void execNormalCase() throws Exception { |
| EvalFunc<Tuple> func = new DataToStringsSketch(); |
| DataBag bag = BAG_FACTORY.newDefaultBag(); |
| bag.add(TUPLE_FACTORY.newTuple("a")); |
| Tuple resultTuple = func.exec(TUPLE_FACTORY.newTuple(bag)); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertFalse(sketch.isEmpty()); |
| Assert.assertEquals(sketch.getN(), 1); |
| } |
| |
| @Test |
| public void execMixedNormalCase() throws Exception { |
| EvalFunc<Tuple> func = new DataToStringsSketch(); |
| DataBag bag = BAG_FACTORY.newDefaultBag(); |
| bag.add(TUPLE_FACTORY.newTuple("a")); |
| bag.add(null); |
| Tuple resultTuple = func.exec(TUPLE_FACTORY.newTuple(bag)); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertFalse(sketch.isEmpty()); |
| Assert.assertEquals(sketch.getN(), 1); |
| } |
| |
| @Test |
| public void accumulator() throws Exception { |
| Accumulator<Tuple> func = new DataToStringsSketch(); |
| |
| // no input yet |
| Tuple resultTuple = func.getValue(); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| |
| // null input tuple |
| func.accumulate(null); |
| resultTuple = func.getValue(); |
| sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| |
| // empty input tuple |
| func.accumulate(TUPLE_FACTORY.newTuple()); |
| resultTuple = func.getValue(); |
| sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| |
| // empty bag |
| func.accumulate(TUPLE_FACTORY.newTuple(BAG_FACTORY.newDefaultBag())); |
| resultTuple = func.getValue(); |
| sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| |
| // normal case |
| DataBag bag = BAG_FACTORY.newDefaultBag(); |
| bag.add(TUPLE_FACTORY.newTuple("a")); |
| func.accumulate(TUPLE_FACTORY.newTuple(bag)); |
| func.accumulate(TUPLE_FACTORY.newTuple(bag)); |
| resultTuple = func.getValue(); |
| sketch = getSketch(resultTuple); |
| Assert.assertFalse(sketch.isEmpty()); |
| Assert.assertEquals(sketch.getN(), 2); |
| |
| // mixed null case |
| bag = BAG_FACTORY.newDefaultBag(); |
| bag.add(TUPLE_FACTORY.newTuple("a")); |
| bag.add(null); |
| func.accumulate(TUPLE_FACTORY.newTuple(bag)); |
| func.accumulate(TUPLE_FACTORY.newTuple(bag)); |
| resultTuple = func.getValue(); |
| sketch = getSketch(resultTuple); |
| Assert.assertFalse(sketch.isEmpty()); |
| Assert.assertEquals(sketch.getN(), 2); |
| |
| // cleanup |
| func.cleanup(); |
| resultTuple = func.getValue(); |
| sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| } |
| |
| @Test |
| public void algebraicInitial() throws Exception { |
| @SuppressWarnings("unchecked") |
| EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new DataToStringsSketch().getInitial()).newInstance(); |
| DataBag bag = BAG_FACTORY.newDefaultBag(); |
| bag.add(TUPLE_FACTORY.newTuple()); |
| Tuple resultTuple = func.exec(TUPLE_FACTORY.newTuple(bag)); |
| Assert.assertNotNull(resultTuple); |
| Assert.assertEquals(resultTuple.size(), 1); |
| Assert.assertTrue(resultTuple.get(0) instanceof DataBag); |
| Assert.assertEquals(((DataBag) resultTuple.get(0)).size(), 1); |
| } |
| |
| @Test |
| public void algebraicIntermediateIsSameAsFinal() { |
| Assert.assertEquals(new DataToStringsSketch().getIntermed(), new DataToStringsSketch().getFinal()); |
| } |
| |
| @Test |
| public void algebraicIntermediateFinalNullInputTuple() throws Exception { |
| @SuppressWarnings("unchecked") |
| EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new DataToStringsSketch().getIntermed()).newInstance(); |
| Tuple resultTuple = func.exec(null); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| } |
| |
| @Test |
| public void algebraicIntermediateFinalEmptyInputTuple() throws Exception { |
| @SuppressWarnings("unchecked") |
| EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new DataToStringsSketch().getIntermed()).newInstance(); |
| Tuple resultTuple = func.exec(TUPLE_FACTORY.newTuple()); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertTrue(sketch.isEmpty()); |
| } |
| |
| @Test |
| public void algebraicIntermediateFinalNormalCase() throws Exception { |
| @SuppressWarnings("unchecked") |
| EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new DataToStringsSketch().getIntermed()).newInstance(); |
| DataBag bag = BAG_FACTORY.newDefaultBag(); |
| |
| { // this is to simulate an output from Initial |
| DataBag innerBag = BAG_FACTORY.newDefaultBag(); |
| innerBag.add(TUPLE_FACTORY.newTuple("a")); |
| bag.add(TUPLE_FACTORY.newTuple(innerBag)); |
| } |
| |
| { // this is to simulate an output from a prior call of IntermediateFinal |
| ItemsSketch<String> qs = ItemsSketch.getInstance(COMPARATOR); |
| qs.update("b"); |
| bag.add(TUPLE_FACTORY.newTuple(new DataByteArray(qs.toByteArray(SER_DE)))); |
| } |
| |
| Tuple resultTuple = func.exec(TUPLE_FACTORY.newTuple(bag)); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertFalse(sketch.isEmpty()); |
| Assert.assertEquals(sketch.getN(), 2); |
| } |
| |
| @Test |
| public void algebraicIntermediateFinalMixedNullCase() throws Exception { |
| @SuppressWarnings("unchecked") |
| EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new DataToStringsSketch().getIntermed()).newInstance(); |
| DataBag bag = BAG_FACTORY.newDefaultBag(); |
| |
| { // this is to simulate an output from Initial |
| DataBag innerBag = BAG_FACTORY.newDefaultBag(); |
| innerBag.add(TUPLE_FACTORY.newTuple("a")); |
| innerBag.add(null); |
| bag.add(TUPLE_FACTORY.newTuple(innerBag)); |
| } |
| |
| { // this is to simulate an output from a prior call of IntermediateFinal |
| ItemsSketch<String> qs = ItemsSketch.getInstance(COMPARATOR); |
| qs.update("b"); |
| bag.add(TUPLE_FACTORY.newTuple(new DataByteArray(qs.toByteArray(SER_DE)))); |
| } |
| |
| Tuple resultTuple = func.exec(TUPLE_FACTORY.newTuple(bag)); |
| ItemsSketch<String> sketch = getSketch(resultTuple); |
| Assert.assertFalse(sketch.isEmpty()); |
| Assert.assertEquals(sketch.getN(), 2); |
| } |
| |
| @Test(expectedExceptions = IllegalArgumentException.class) |
| public void algebraicIntermediateFinalWrongType() throws Exception { |
| @SuppressWarnings("unchecked") |
| EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new DataToStringsSketch().getIntermed()).newInstance(); |
| DataBag bag = BAG_FACTORY.newDefaultBag(); |
| |
| // this bag must have tuples with either bags or data byte arrays |
| bag.add(TUPLE_FACTORY.newTuple("a")); |
| func.exec(TUPLE_FACTORY.newTuple(bag)); |
| } |
| |
| @Test |
| public void schema() throws Exception { |
| EvalFunc<Tuple> func = new DataToStringsSketch(); |
| Schema schema = func.outputSchema(new Schema()); |
| Assert.assertNotNull(schema); |
| Assert.assertEquals(schema.size(), 1); |
| Assert.assertEquals(schema.getField(0).type, DataType.TUPLE); |
| Assert.assertEquals(schema.getField(0).schema.size(), 1); |
| Assert.assertEquals(schema.getField(0).schema.getField(0).type, DataType.BYTEARRAY); |
| } |
| |
| // end of tests |
| |
| private static ItemsSketch<String> getSketch(Tuple tuple) throws Exception { |
| Assert.assertNotNull(tuple); |
| Assert.assertEquals(tuple.size(), 1); |
| DataByteArray bytes = (DataByteArray) tuple.get(0); |
| Assert.assertTrue(bytes.size() > 0); |
| return ItemsSketch.getInstance(Memory.wrap(bytes.get()), COMPARATOR, SER_DE); |
| } |
| } |