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* 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
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package hivemall.tools.array;
import hivemall.utils.hadoop.WritableUtils;
import java.util.List;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
import org.apache.hadoop.hive.serde2.io.DoubleWritable;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
import org.junit.Assert;
import org.junit.Test;
public class SelectKBeatUDFTest {
@Test
public void test() throws Exception {
final SelectKBestUDF selectKBest = new SelectKBestUDF();
final int k = 2;
final double[] data = new double[] {250.29999999999998, 170.90000000000003, 73.2,
12.199999999999996};
final double[] importanceList = new double[] {292.1666753739119, 152.70000455081467,
187.93333893418327, 59.93333511948589};
final GenericUDF.DeferredObject[] dObjs = new GenericUDF.DeferredObject[] {
new GenericUDF.DeferredJavaObject(WritableUtils.toWritableList(data)),
new GenericUDF.DeferredJavaObject(WritableUtils.toWritableList(importanceList)),
new GenericUDF.DeferredJavaObject(k)};
selectKBest.initialize(new ObjectInspector[] {
ObjectInspectorFactory.getStandardListObjectInspector(PrimitiveObjectInspectorFactory.writableDoubleObjectInspector),
ObjectInspectorFactory.getStandardListObjectInspector(PrimitiveObjectInspectorFactory.writableDoubleObjectInspector),
ObjectInspectorUtils.getConstantObjectInspector(
PrimitiveObjectInspectorFactory.javaIntObjectInspector, k)});
final List<DoubleWritable> resultObj = selectKBest.evaluate(dObjs);
Assert.assertEquals(resultObj.size(), k);
final double[] result = new double[k];
for (int i = 0; i < k; i++) {
result[i] = resultObj.get(i).get();
}
final double[] answer = new double[] {250.29999999999998, 73.2};
Assert.assertArrayEquals(answer, result, 0.d);
selectKBest.close();
}
}