/*
* 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.test.javaApiOperators;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import org.apache.flink.api.common.functions.CoGroupFunction;
import org.apache.flink.api.common.functions.FlatJoinFunction;
import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.common.functions.GroupCombineFunction;
import org.apache.flink.api.common.functions.GroupReduceFunction;
import org.apache.flink.api.common.functions.JoinFunction;
import org.apache.flink.api.common.functions.MapFunction;
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.tuple.Tuple3;
import org.apache.flink.api.java.typeutils.TupleTypeInfo;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.test.javaApiOperators.util.CollectionDataSets;
import org.apache.flink.test.util.JavaProgramTestBase;
import org.apache.flink.util.Collector;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
@RunWith(Parameterized.class)
public class TypeHintITCase extends JavaProgramTestBase {
private static int NUM_PROGRAMS = 9;
private int curProgId = config.getInteger("ProgramId", -1);
public TypeHintITCase(Configuration config) {
super(config);
}
@Override
protected void testProgram() throws Exception {
TypeHintProgs.runProgram(curProgId);
}
@Parameters
public static Collection<Object[]> getConfigurations() throws FileNotFoundException, IOException {
LinkedList<Configuration> tConfigs = new LinkedList<Configuration>();
for(int i=1; i <= NUM_PROGRAMS; i++) {
Configuration config = new Configuration();
config.setInteger("ProgramId", i);
tConfigs.add(config);
}
return toParameterList(tConfigs);
}
private static class TypeHintProgs {
public static void runProgram(int progId) throws Exception {
switch(progId) {
// Test identity map with missing types and string type hint
case 1: {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> identityMapDs = ds
.map(new Mapper<Tuple3<Integer, Long, String>, Tuple3<Integer, Long, String>>())
.returns("Tuple3<Integer, Long, String>");
List<Tuple3<Integer, Long, String>> result = identityMapDs.collect();
String expectedResult = "(2,2,Hello)\n" +
"(3,2,Hello world)\n" +
"(1,1,Hi)\n";
compareResultAsText(result, expectedResult);
break;
}
// Test identity map with missing types and type information type hint
case 2: {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> identityMapDs = ds
// all following generics get erased during compilation
.map(new Mapper<Tuple3<Integer, Long, String>, Tuple3<Integer, Long, String>>())
.returns(new TupleTypeInfo<Tuple3<Integer, Long, String>>(BasicTypeInfo.INT_TYPE_INFO, BasicTypeInfo.LONG_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO));
List<Tuple3<Integer, Long, String>> result = identityMapDs
.collect();
String expectedResult = "(2,2,Hello)\n" +
"(3,2,Hello world)\n" +
"(1,1,Hi)\n";
compareResultAsText(result, expectedResult);
break;
}
// Test flat map with class type hint
case 3: {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Integer> identityMapDs = ds
.flatMap(new FlatMapper<Tuple3<Integer, Long, String>, Integer>())
.returns(Integer.class);
List<Integer> result = identityMapDs.collect();
String expectedResult = "2\n" +
"3\n" +
"1\n";
compareResultAsText(result, expectedResult);
break;
}
// Test join with type information type hint
case 4: {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds1 = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> ds2 = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Integer> resultDs = ds1
.join(ds2)
.where(0)
.equalTo(0)
.with(new Joiner<Tuple3<Integer, Long, String>, Tuple3<Integer, Long, String>, Integer>())
.returns(BasicTypeInfo.INT_TYPE_INFO);
List<Integer> result = resultDs.collect();
String expectedResult = "2\n" +
"3\n" +
"1\n";
compareResultAsText(result, expectedResult);
break;
}
// Test flat join with type information type hint
case 5: {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds1 = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> ds2 = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Integer> resultDs = ds1
.join(ds2)
.where(0)
.equalTo(0)
.with(new FlatJoiner<Tuple3<Integer, Long, String>, Tuple3<Integer, Long, String>, Integer>())
.returns(BasicTypeInfo.INT_TYPE_INFO);
List<Integer> result = resultDs.collect();
String expectedResult = "2\n" +
"3\n" +
"1\n";
compareResultAsText(result, expectedResult);
break;
}
// Test unsorted group reduce with type information type hint
case 6: {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Integer> resultDs = ds
.groupBy(0)
.reduceGroup(new GroupReducer<Tuple3<Integer, Long, String>, Integer>())
.returns(BasicTypeInfo.INT_TYPE_INFO);
List<Integer> result = resultDs.collect();
String expectedResult = "2\n" +
"3\n" +
"1\n";
compareResultAsText(result, expectedResult);
break;
}
// Test sorted group reduce with type information type hint
case 7: {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Integer> resultDs = ds
.groupBy(0)
.sortGroup(0, Order.ASCENDING)
.reduceGroup(new GroupReducer<Tuple3<Integer, Long, String>, Integer>())
.returns(BasicTypeInfo.INT_TYPE_INFO);
List<Integer> result = resultDs.collect();
String expectedResult = "2\n" +
"3\n" +
"1\n";
compareResultAsText(result, expectedResult);
break;
}
// Test combine group with type information type hint
case 8: {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Integer> resultDs = ds
.groupBy(0)
.combineGroup(new GroupCombiner<Tuple3<Integer, Long, String>, Integer>())
.returns(BasicTypeInfo.INT_TYPE_INFO);
List<Integer> result = resultDs.collect();
String expectedResult = "2\n" +
"3\n" +
"1\n";
compareResultAsText(result, expectedResult);
break;
}
// Test cogroup with type information type hint
case 9: {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple3<Integer, Long, String>> ds1 = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Tuple3<Integer, Long, String>> ds2 = CollectionDataSets.getSmall3TupleDataSet(env);
DataSet<Integer> resultDs = ds1
.coGroup(ds2)
.where(0)
.equalTo(0)
.with(new CoGrouper<Tuple3<Integer, Long, String>, Tuple3<Integer, Long, String>, Integer>())
.returns(BasicTypeInfo.INT_TYPE_INFO);
List<Integer> result = resultDs.collect();
String expectedResult = "2\n" +
"3\n" +
"1\n";
compareResultAsText(result, expectedResult);
break;
}
default:
throw new IllegalArgumentException("Invalid program id");
}
}
}
// --------------------------------------------------------------------------------------------
public static class Mapper<T, V> implements MapFunction<T, V> {
private static final long serialVersionUID = 1L;
@SuppressWarnings("unchecked")
@Override
public V map(T value) throws Exception {
return (V) value;
}
}
public static class FlatMapper<T, V> implements FlatMapFunction<T, V> {
private static final long serialVersionUID = 1L;
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
public void flatMap(T value, Collector<V> out) throws Exception {
out.collect((V) ((Tuple3)value).f0);
}
}
public static class Joiner<IN1, IN2, OUT> implements JoinFunction<IN1, IN2, OUT> {
private static final long serialVersionUID = 1L;
@Override
public OUT join(IN1 first, IN2 second) throws Exception {
return (OUT) ((Tuple3) first).f0;
}
}
public static class FlatJoiner<IN1, IN2, OUT> implements FlatJoinFunction<IN1, IN2, OUT> {
private static final long serialVersionUID = 1L;
@Override
public void join(IN1 first, IN2 second, Collector<OUT> out) throws Exception {
out.collect((OUT) ((Tuple3) first).f0);
}
}
public static class GroupReducer<IN, OUT> implements GroupReduceFunction<IN, OUT> {
private static final long serialVersionUID = 1L;
@Override
public void reduce(Iterable<IN> values, Collector<OUT> out) throws Exception {
out.collect((OUT) ((Tuple3) values.iterator().next()).f0);
}
}
public static class GroupCombiner<IN, OUT> implements GroupCombineFunction<IN, OUT> {
private static final long serialVersionUID = 1L;
@Override
public void combine(Iterable<IN> values, Collector<OUT> out) throws Exception {
out.collect((OUT) ((Tuple3) values.iterator().next()).f0);
}
}
public static class CoGrouper<IN1, IN2, OUT> implements CoGroupFunction<IN1, IN2, OUT> {
private static final long serialVersionUID = 1L;
@Override
public void coGroup(Iterable<IN1> first, Iterable<IN2> second, Collector<OUT> out) throws Exception {
out.collect((OUT) ((Tuple3) first.iterator().next()).f0);
}
}
}