/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package org.apache.datasketches.hive.frequencies; import java.util.Arrays; import org.apache.datasketches.ArrayOfItemsSerDe; import org.apache.datasketches.ArrayOfStringsSerDe; import org.apache.datasketches.frequencies.ItemsSketch; import org.apache.datasketches.hive.common.BytesWritableHelper; import org.apache.hadoop.hive.ql.exec.UDFArgumentException; import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator; import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.Mode; import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFParameterInfo; import org.apache.hadoop.hive.ql.udf.generic.SimpleGenericUDAFParameterInfo; import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector; import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory; import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector; import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector.PrimitiveCategory; import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory; import org.apache.hadoop.io.BytesWritable; import org.apache.hadoop.io.IntWritable; import org.testng.Assert; import org.testng.annotations.Test; @SuppressWarnings({"javadoc","resource"}) public class DataToStringsSketchUDAFTest { static final ArrayOfItemsSerDe<String> serDe = new ArrayOfStringsSerDe(); static final ObjectInspector stringInspector = PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.STRING); static final ObjectInspector intInspector = PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.INT); static final ObjectInspector binaryInspector = PrimitiveObjectInspectorFactory.getPrimitiveWritableObjectInspector(PrimitiveCategory.BINARY); @Test(expectedExceptions = UDFArgumentException.class) public void getEvaluatorTooFewInspectors() throws Exception { ObjectInspector[] inspectors = new ObjectInspector[] { stringInspector }; GenericUDAFParameterInfo info = new SimpleGenericUDAFParameterInfo(inspectors, false, false, false); new DataToStringsSketchUDAF().getEvaluator(info); } @Test(expectedExceptions = UDFArgumentException.class) public void getEvaluatorTooManyInspectors() throws Exception { ObjectInspector[] inspectors = new ObjectInspector[] { stringInspector, intInspector, intInspector }; GenericUDAFParameterInfo info = new SimpleGenericUDAFParameterInfo(inspectors, false, false, false); new DataToStringsSketchUDAF().getEvaluator(info); } static final ObjectInspector structInspector = ObjectInspectorFactory.getStandardStructObjectInspector( Arrays.asList("a"), Arrays.asList(intInspector) ); @Test(expectedExceptions = UDFArgumentException.class) public void getEvaluatorWrongCategoryArg1() throws Exception { ObjectInspector[] inspectors = new ObjectInspector[] { structInspector }; GenericUDAFParameterInfo info = new SimpleGenericUDAFParameterInfo(inspectors, false, false, false); new DataToStringsSketchUDAF().getEvaluator(info); } @Test(expectedExceptions = UDFArgumentException.class) public void getEvaluatorWrongCategoryArg2() throws Exception { ObjectInspector[] inspectors = new ObjectInspector[] { stringInspector, structInspector }; GenericUDAFParameterInfo info = new SimpleGenericUDAFParameterInfo(inspectors, false, false, false); new DataToStringsSketchUDAF().getEvaluator(info); } @Test(expectedExceptions = UDFArgumentException.class) public void getEvaluatorWrongTypeArg2() throws Exception { ObjectInspector[] inspectors = new ObjectInspector[] { stringInspector, stringInspector }; GenericUDAFParameterInfo info = new SimpleGenericUDAFParameterInfo(inspectors, false, false, false); new DataToStringsSketchUDAF().getEvaluator(info); } @Test public void iterateTerminatePartial() throws Exception { ObjectInspector[] inspectors = new ObjectInspector[] { stringInspector, intInspector }; GenericUDAFParameterInfo info = new SimpleGenericUDAFParameterInfo(inspectors, false, false, false); try (GenericUDAFEvaluator eval = new DataToStringsSketchUDAF().getEvaluator(info)) { ObjectInspector resultInspector = eval.init(Mode.PARTIAL1, inspectors); checkResultInspector(resultInspector); @SuppressWarnings("unchecked") ItemsState<String> state = (ItemsState<String>) eval.getNewAggregationBuffer(); eval.iterate(state, new Object[] { new org.apache.hadoop.io.Text("a"), new IntWritable(256) }); eval.iterate(state, new Object[] { new org.apache.hadoop.io.Text("b"), new IntWritable(256) }); BytesWritable bytes = (BytesWritable) eval.terminatePartial(state); ItemsSketch<String> resultSketch = ItemsSketch.getInstance(BytesWritableHelper.wrapAsMemory(bytes), serDe); Assert.assertEquals(resultSketch.getStreamLength(), 2); Assert.assertEquals(resultSketch.getNumActiveItems(), 2); Assert.assertEquals(resultSketch.getEstimate("a"), 1); Assert.assertEquals(resultSketch.getEstimate("b"), 1); } } @Test public void mergeTerminateEmptyState() throws Exception { ObjectInspector[] inspectors = new ObjectInspector[] { stringInspector, intInspector }; GenericUDAFParameterInfo info = new SimpleGenericUDAFParameterInfo(inspectors, false, false, false); try (GenericUDAFEvaluator eval = new DataToStringsSketchUDAF().getEvaluator(info)) { ObjectInspector resultInspector = eval.init(Mode.PARTIAL2, new ObjectInspector[] { binaryInspector }); checkResultInspector(resultInspector); @SuppressWarnings("unchecked") ItemsState<String> state = (ItemsState<String>) eval.getNewAggregationBuffer(); ItemsSketch<String> sketch1 = new ItemsSketch<>(256); sketch1.update("a"); eval.merge(state, new BytesWritable(sketch1.toByteArray(serDe))); ItemsSketch<String> sketch2 = new ItemsSketch<>(256); sketch2.update("b"); eval.merge(state, new BytesWritable(sketch2.toByteArray(serDe))); BytesWritable bytes = (BytesWritable) eval.terminate(state); ItemsSketch<String> resultSketch = ItemsSketch.getInstance(BytesWritableHelper.wrapAsMemory(bytes), serDe); Assert.assertEquals(resultSketch.getStreamLength(), 2); Assert.assertEquals(resultSketch.getNumActiveItems(), 2); Assert.assertEquals(resultSketch.getEstimate("a"), 1); Assert.assertEquals(resultSketch.getEstimate("b"), 1); } } @Test public void mergeTerminate() throws Exception { ObjectInspector[] inspectors = new ObjectInspector[] { stringInspector, intInspector }; GenericUDAFParameterInfo info = new SimpleGenericUDAFParameterInfo(inspectors, false, false, false); try (GenericUDAFEvaluator eval = new DataToStringsSketchUDAF().getEvaluator(info)) { ObjectInspector resultInspector = eval.init(Mode.PARTIAL2, new ObjectInspector[] { binaryInspector }); checkResultInspector(resultInspector); @SuppressWarnings("unchecked") ItemsState<String> state = (ItemsState<String>) eval.getNewAggregationBuffer(); state.init(256); state.update("a"); ItemsSketch<String> sketch = new ItemsSketch<>(256); sketch.update("b"); eval.merge(state, new BytesWritable(sketch.toByteArray(serDe))); BytesWritable bytes = (BytesWritable) eval.terminate(state); ItemsSketch<String> resultSketch = ItemsSketch.getInstance(BytesWritableHelper.wrapAsMemory(bytes), serDe); Assert.assertEquals(resultSketch.getStreamLength(), 2); Assert.assertEquals(resultSketch.getNumActiveItems(), 2); Assert.assertEquals(resultSketch.getEstimate("a"), 1); Assert.assertEquals(resultSketch.getEstimate("b"), 1); } } private static void checkResultInspector(ObjectInspector resultInspector) { Assert.assertNotNull(resultInspector); Assert.assertEquals(resultInspector.getCategory(), ObjectInspector.Category.PRIMITIVE); Assert.assertEquals( ((PrimitiveObjectInspector) resultInspector).getPrimitiveCategory(), PrimitiveObjectInspector.PrimitiveCategory.BINARY ); } }