/***********************************************************************************************************************
*
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed 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 eu.stratosphere.api.java.operators.translation;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import org.junit.Test;
import eu.stratosphere.api.common.Plan;
import eu.stratosphere.api.common.operators.base.GenericDataSinkBase;
import eu.stratosphere.api.common.operators.base.GenericDataSourceBase;
import eu.stratosphere.api.common.operators.base.GroupReduceOperatorBase;
import eu.stratosphere.api.java.DataSet;
import eu.stratosphere.api.java.ExecutionEnvironment;
import eu.stratosphere.api.java.aggregation.Aggregations;
import eu.stratosphere.api.java.tuple.Tuple3;
import eu.stratosphere.types.StringValue;
public class AggregateTranslationTest {
@Test
public void translateAggregate() {
try {
final int DOP = 8;
ExecutionEnvironment env = ExecutionEnvironment.createLocalEnvironment(DOP);
@SuppressWarnings("unchecked")
DataSet<Tuple3<Double, StringValue, Long>> initialData =
env.fromElements(new Tuple3<Double, StringValue, Long>(3.141592, new StringValue("foobar"), new Long(77)));
initialData.groupBy(0).aggregate(Aggregations.MIN, 1).and(Aggregations.SUM, 2).print();
Plan p = env.createProgramPlan();
GenericDataSinkBase<?> sink = p.getDataSinks().iterator().next();
GroupReduceOperatorBase<?, ?, ?> reducer = (GroupReduceOperatorBase<?, ?, ?>) sink.getInput();
// check keys
assertEquals(1, reducer.getKeyColumns(0).length);
assertEquals(0, reducer.getKeyColumns(0)[0]);
assertEquals(-1, reducer.getDegreeOfParallelism());
assertTrue(reducer.isCombinable());
assertTrue(reducer.getInput() instanceof GenericDataSourceBase<?, ?>);
}
catch (Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
fail("Test caused an error: " + e.getMessage());
}
}
}