/***********************************************************************************************************************
*
* 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.BeforeClass;
import org.junit.Test;
import eu.stratosphere.api.common.InvalidProgramException;
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;
@SuppressWarnings("serial")
public class CoGroupOperatorTest {
// TUPLE DATA
private static 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
);
private static List<CustomType> customTypeData = new ArrayList<CustomType>();
@BeforeClass
public static void insertCustomData() {
customTypeData.add(new CustomType());
}
@Test
public void testCoGroupKeyFields1() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds2 = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should work
try {
ds1.coGroup(ds2).where(0).equalTo(0);
} catch(Exception e) {
Assert.fail();
}
}
@Test(expected = InvalidProgramException.class)
public void testCoGroupKeyFields2() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds2 = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, incompatible cogroup key types
ds1.coGroup(ds2).where(0).equalTo(2);
}
@Test(expected = InvalidProgramException.class)
public void testCoGroupKeyFields3() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds2 = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, incompatible number of cogroup keys
ds1.coGroup(ds2).where(0,1).equalTo(2);
}
@Test(expected = IllegalArgumentException.class)
public void testCoGroupKeyFields4() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds2 = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, cogroup key out of range
ds1.coGroup(ds2).where(5).equalTo(0);
}
@Test(expected = IllegalArgumentException.class)
public void testCoGroupKeyFields5() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds2 = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, empty cogroup key
ds1.coGroup(ds2).where().equalTo();
}
@Test(expected = IllegalArgumentException.class)
public void testCoGroupKeyFields6() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds2 = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, negative key field position
ds1.coGroup(ds2).where(-1).equalTo(-1);
}
@Test(expected = IllegalArgumentException.class)
public void testCoGroupKeyFields7() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<CustomType> ds2 = env.fromCollection(customTypeData);
// should not work, cogroup key fields on custom type
ds1.coGroup(ds2).where(5).equalTo(0);
}
@Test
public void testCoGroupKeySelectors1() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
DataSet<CustomType> ds2 = env.fromCollection(customTypeData);
// should work
try {
ds1.coGroup(ds2)
.where(
new KeySelector<CustomType, Long>() {
@Override
public Long getKey(CustomType value) {
return value.myLong;
}
}
)
.equalTo(
new KeySelector<CustomType, Long>() {
@Override
public Long getKey(CustomType value) {
return value.myLong;
}
}
);
} catch(Exception e) {
Assert.fail();
}
}
@Test
public void testCoGroupKeyMixing1() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<CustomType> ds1 = env.fromCollection(customTypeData);
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds2 = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should work
try {
ds1.coGroup(ds2)
.where(
new KeySelector<CustomType, Long>() {
@Override
public Long getKey(CustomType value) {
return value.myLong;
}
}
)
.equalTo(3);
} catch(Exception e) {
Assert.fail();
}
}
@Test
public void testCoGroupKeyMixing2() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<CustomType> ds2 = env.fromCollection(customTypeData);
// should work
try {
ds1.coGroup(ds2)
.where(3)
.equalTo(
new KeySelector<CustomType, Long>() {
@Override
public Long getKey(CustomType value) {
return value.myLong;
}
}
);
} catch(Exception e) {
Assert.fail();
}
}
@Test(expected = InvalidProgramException.class)
public void testCoGroupKeyMixing3() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<CustomType> ds2 = env.fromCollection(customTypeData);
// should not work, incompatible types
ds1.coGroup(ds2)
.where(2)
.equalTo(
new KeySelector<CustomType, Long>() {
@Override
public Long getKey(CustomType value) {
return value.myLong;
}
}
);
}
@Test(expected = InvalidProgramException.class)
public void testCoGroupKeyMixing4() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> ds1 = env.fromCollection(emptyTupleData, tupleTypeInfo);
DataSet<CustomType> ds2 = env.fromCollection(customTypeData);
// should not work, more than one key field position
ds1.coGroup(ds2)
.where(1,3)
.equalTo(
new KeySelector<CustomType, Long>() {
@Override
public Long getKey(CustomType value) {
return value.myLong;
}
}
);
}
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;
}
}
}