| /* |
| * 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.tuple; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.apache.datasketches.hive.common.BytesWritableHelper; |
| import org.apache.datasketches.tuple.arrayofdoubles.ArrayOfDoublesSketch; |
| import org.apache.datasketches.tuple.arrayofdoubles.ArrayOfDoublesSketchIterator; |
| import org.apache.datasketches.tuple.arrayofdoubles.ArrayOfDoublesSketches; |
| import org.apache.hadoop.hive.ql.exec.UDFArgumentException; |
| import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException; |
| import org.apache.hadoop.hive.ql.metadata.HiveException; |
| import org.apache.hadoop.hive.ql.udf.generic.GenericUDTF; |
| 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.StructObjectInspector; |
| import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory; |
| import org.apache.hadoop.io.BytesWritable; |
| |
| @SuppressWarnings("javadoc") |
| public class ArrayOfDoublesSketchToValuesUDTF extends GenericUDTF { |
| |
| PrimitiveObjectInspector inputObjectInspector; |
| |
| @SuppressWarnings("deprecation") |
| @Override |
| public StructObjectInspector initialize(final ObjectInspector[] inspectors) throws UDFArgumentException { |
| if (inspectors.length != 1) { |
| throw new UDFArgumentException("One argument expected"); |
| } |
| if (inspectors[0].getCategory() != ObjectInspector.Category.PRIMITIVE) { |
| throw new UDFArgumentTypeException(0, "Primitive argument expected, but " |
| + inspectors[0].getCategory().name() + " was recieved"); |
| } |
| this.inputObjectInspector = (PrimitiveObjectInspector) inspectors[0]; |
| if (this.inputObjectInspector.getPrimitiveCategory() != PrimitiveObjectInspector.PrimitiveCategory.BINARY) { |
| throw new UDFArgumentTypeException(0, "Binary value expected as the first argument, but " |
| + this.inputObjectInspector.getPrimitiveCategory().name() + " was recieved"); |
| } |
| |
| return ObjectInspectorFactory.getStandardStructObjectInspector( |
| Arrays.asList("values"), |
| Arrays.asList( |
| ObjectInspectorFactory.getStandardListObjectInspector( |
| PrimitiveObjectInspectorFactory.javaDoubleObjectInspector |
| ) |
| ) |
| ); |
| } |
| |
| @Override |
| public void process(final Object[] data) throws HiveException { |
| if (data == null || data[0] == null) { return; } |
| final BytesWritable serializedSketch = |
| (BytesWritable) this.inputObjectInspector.getPrimitiveWritableObject(data[0]); |
| final ArrayOfDoublesSketch sketch = ArrayOfDoublesSketches.wrapSketch( |
| BytesWritableHelper.wrapAsMemory(serializedSketch)); |
| final ArrayOfDoublesSketchIterator it = sketch.iterator(); |
| while (it.next()) { |
| forward(new Object[] { primitivesToList(it.getValues()) }); |
| } |
| } |
| |
| @Override |
| public void close() throws HiveException { |
| } |
| |
| static List<Double> primitivesToList(final double[] array) { |
| final List<Double> result = new ArrayList<>(array.length); |
| for (double item: array) { result.add(item); } |
| return result; |
| } |
| |
| } |