/*
* 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.flink.api.java.operator;
import java.util.ArrayList;
import java.util.List;
import org.junit.Assert;
import org.apache.flink.api.common.InvalidProgramException;
import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
import org.apache.flink.api.java.aggregation.Aggregations;
import org.apache.flink.api.java.aggregation.UnsupportedAggregationTypeException;
import org.apache.flink.api.java.tuple.Tuple5;
import org.apache.flink.api.java.typeutils.TupleTypeInfo;
import org.junit.Test;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
public class AggregateOperatorTest {
// TUPLE DATA
private final List<Tuple5<Integer, Long, String, Long, Integer>> emptyTupleData =
new ArrayList<Tuple5<Integer, Long, String, Long, Integer>>();
private final TupleTypeInfo<Tuple5<Integer, Long, String, Long, Integer>> tupleTypeInfo = new
TupleTypeInfo<Tuple5<Integer, Long, String, Long, Integer>>(
BasicTypeInfo.INT_TYPE_INFO,
BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO,
BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.INT_TYPE_INFO
);
// LONG DATA
private final List<Long> emptyLongData = new ArrayList<Long>();
@Test
public void testFieldsAggregate() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should work
try {
tupleDs.aggregate(Aggregations.SUM, 1);
} catch(Exception e) {
Assert.fail();
}
// should not work: index out of bounds
try {
tupleDs.aggregate(Aggregations.SUM, 10);
Assert.fail();
} catch(IllegalArgumentException iae) {
// we're good here
} catch(Exception e) {
Assert.fail();
}
// should not work: not applied to tuple dataset
DataSet<Long> longDs = env.fromCollection(emptyLongData, BasicTypeInfo.LONG_TYPE_INFO);
try {
longDs.aggregate(Aggregations.MIN, 1);
Assert.fail();
} catch(InvalidProgramException uoe) {
// we're good here
} catch(Exception e) {
Assert.fail();
}
}
@Test
public void testAggregationTypes() {
try {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should work: multiple aggregates
tupleDs.aggregate(Aggregations.SUM, 0).and(Aggregations.MIN, 4);
// should work: nested aggregates
tupleDs.aggregate(Aggregations.MIN, 2).aggregate(Aggregations.SUM, 1);
// should not work: average on string
try {
tupleDs.aggregate(Aggregations.SUM, 2);
Assert.fail();
} catch (UnsupportedAggregationTypeException iae) {
// we're good here
}
}
catch(Exception e) {
System.err.println(e.getMessage());
e.printStackTrace();
Assert.fail(e.getMessage());
}
}
}