/*
* 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.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import org.apache.flink.api.common.InvalidProgramException;
import org.apache.flink.api.common.operators.Order;
import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.functions.KeySelector;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.api.java.tuple.Tuple5;
import org.apache.flink.api.java.typeutils.TupleTypeInfo;
import org.junit.Assert;
import org.junit.Test;
public class GroupingTest {
// 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>();
private final List<CustomType> customTypeData = new ArrayList<CustomType>();
@Test
public void testGroupByKeyFields1() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should work
try {
tupleDs.groupBy(0);
} catch(Exception e) {
Assert.fail();
}
}
@Test(expected = InvalidProgramException.class)
public void testGroupByKeyFields2() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Long> longDs = env.fromCollection(emptyLongData, BasicTypeInfo.LONG_TYPE_INFO);
// should not work: groups on basic type
longDs.groupBy(0);
}
@Test(expected = InvalidProgramException.class)
public void testGroupByKeyFields3() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
DataSet<CustomType> customDs = env.fromCollection(customTypeData);
// should not work: groups on custom type
customDs.groupBy(0);
}
@Test(expected = IllegalArgumentException.class)
public void testGroupByKeyFields4() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, key out of tuple bounds
tupleDs.groupBy(5);
}
@Test(expected = IllegalArgumentException.class)
public void testGroupByKeyFields5() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, negative field position
tupleDs.groupBy(-1);
}
@Test
public void testGroupByKeyExpressions1() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
DataSet<CustomType> ds = env.fromCollection(customTypeData);
// should work
try {
ds.groupBy("myInt");
} catch(Exception e) {
Assert.fail();
}
}
@Test(expected = IllegalArgumentException.class)
public void testGroupByKeyExpressions2() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Long> longDs = env.fromCollection(emptyLongData, BasicTypeInfo.LONG_TYPE_INFO);
// should not work: groups on basic type
longDs.groupBy("myInt");
}
@Test(expected = InvalidProgramException.class)
public void testGroupByKeyExpressions3() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
DataSet<CustomType> customDs = env.fromCollection(customTypeData);
// should not work: tuple selector on custom type
customDs.groupBy(0);
}
@Test(expected = IllegalArgumentException.class)
public void testGroupByKeyExpressions4() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<CustomType> ds = env.fromCollection(customTypeData);
// should not work, key out of tuple bounds
ds.groupBy("myNonExistent");
}
@Test
public void testGroupByKeyExpressions1Nested() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
DataSet<CustomType> ds = env.fromCollection(customTypeData);
// should work
try {
ds.groupBy("nested.myInt");
} catch(Exception e) {
Assert.fail();
}
}
@Test(expected = IllegalArgumentException.class)
public void testGroupByKeyExpressions2Nested() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<CustomType> ds = env.fromCollection(customTypeData);
// should not work, key out of tuple bounds
ds.groupBy("nested.myNonExistent");
}
@Test
@SuppressWarnings("serial")
public void testGroupByKeySelector1() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
try {
DataSet<CustomType> customDs = env.fromCollection(customTypeData);
// should work
customDs.groupBy(
new KeySelector<GroupingTest.CustomType, Long>() {
@Override
public Long getKey(CustomType value) {
return value.myLong;
}
});
} catch(Exception e) {
Assert.fail();
}
}
@Test
@SuppressWarnings("serial")
public void testGroupByKeySelector2() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
try {
DataSet<CustomType> customDs = env.fromCollection(customTypeData);
// should work
customDs.groupBy(
new KeySelector<GroupingTest.CustomType, Tuple2<Integer, Long>>() {
@Override
public Tuple2<Integer,Long> getKey(CustomType value) {
return new Tuple2<Integer, Long>(value.myInt, value.myLong);
}
});
} catch(Exception e) {
Assert.fail();
}
}
@Test(expected=IllegalArgumentException.class)
@SuppressWarnings("serial")
public void testGroupByKeySelector3() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
DataSet<CustomType> customDs = env.fromCollection(customTypeData);
// should not work
customDs.groupBy(
new KeySelector<GroupingTest.CustomType, CustomType>() {
@Override
public CustomType getKey(CustomType value) {
return value;
}
});
}
@Test(expected=IllegalArgumentException.class)
@SuppressWarnings("serial")
public void testGroupByKeySelector4() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
DataSet<CustomType> customDs = env.fromCollection(customTypeData);
// should not work
customDs.groupBy(
new KeySelector<GroupingTest.CustomType, Tuple2<Integer, GroupingTest.CustomType>>() {
@Override
public Tuple2<Integer, CustomType> getKey(CustomType value) {
return new Tuple2<Integer, CustomType>(value.myInt, value);
}
});
}
@Test
public void testGroupSortKeyFields1() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should work
try {
tupleDs.groupBy(0).sortGroup(0, Order.ASCENDING);
} catch(Exception e) {
Assert.fail();
}
}
@Test(expected = IllegalArgumentException.class)
public void testGroupSortKeyFields2() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, field index out of bounds
tupleDs.groupBy(0).sortGroup(5, Order.ASCENDING);
}
@Test(expected = InvalidProgramException.class)
public void testGroupSortKeyFields3() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Long> longDs = env.fromCollection(emptyLongData, BasicTypeInfo.LONG_TYPE_INFO);
// should not work: sorted groups on groupings by key selectors
longDs.groupBy(new KeySelector<Long, Long>() {
private static final long serialVersionUID = 1L;
@Override
public Long getKey(Long value) {
return value;
}
}).sortGroup(0, Order.ASCENDING);
}
@Test
public void testChainedGroupSortKeyFields() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should work
try {
tupleDs.groupBy(0).sortGroup(0, Order.ASCENDING).sortGroup(2, Order.DESCENDING);
} catch(Exception e) {
Assert.fail();
}
}
public static class CustomType implements Serializable {
public static class Nest {
public int myInt;
}
private static final long serialVersionUID = 1L;
public int myInt;
public long myLong;
public String myString;
public Nest nested;
public CustomType() {};
public CustomType(int i, long l, String s) {
myInt = i;
myLong = l;
myString = s;
}
@Override
public String toString() {
return myInt+","+myLong+","+myString;
}
}
}