/***********************************************************************************************************************
*
* 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.operator;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import junit.framework.Assert;
import org.junit.Test;
import eu.stratosphere.api.common.InvalidProgramException;
import eu.stratosphere.api.common.operators.Order;
import eu.stratosphere.api.java.DataSet;
import eu.stratosphere.api.java.ExecutionEnvironment;
import eu.stratosphere.api.java.functions.KeySelector;
import eu.stratosphere.api.java.tuple.Tuple5;
import eu.stratosphere.api.java.typeutils.BasicTypeInfo;
import eu.stratosphere.api.java.typeutils.TupleTypeInfo;
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, empty key group
tupleDs.groupBy();
}
@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, key out of tuple bounds
tupleDs.groupBy(5);
}
@Test(expected = IllegalArgumentException.class)
public void testGroupByKeyFields6() {
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
@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
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 {
private static final long serialVersionUID = 1L;
public int myInt;
public long myLong;
public String myString;
public CustomType() {};
public CustomType(int i, long l, String s) {
myInt = i;
myLong = l;
myString = s;
}
@Override
public String toString() {
return myInt+","+myLong+","+myString;
}
}
}