/*
* 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.graph.test.operations;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.tuple.Tuple1;
import org.apache.flink.graph.Graph;
import org.apache.flink.graph.Vertex;
import org.apache.flink.graph.test.TestGraphUtils;
import org.apache.flink.graph.test.TestGraphUtils.DummyCustomParameterizedType;
import org.apache.flink.graph.test.TestGraphUtils.DummyCustomType;
import org.apache.flink.test.util.MultipleProgramsTestBase;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.util.List;
@RunWith(Parameterized.class)
public class MapVerticesITCase extends MultipleProgramsTestBase {
public MapVerticesITCase(TestExecutionMode mode) {
super(mode);
}
private String expectedResult;
@Test
public void testWithSameValue() throws Exception {
/*
* Test mapVertices() keeping the same value type
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeData(env), env);
DataSet<Vertex<Long, Long>> mappedVertices = graph.mapVertices(new AddOneMapper()).getVertices();
List<Vertex<Long, Long>> result = mappedVertices.collect();
expectedResult = "1,2\n" +
"2,3\n" +
"3,4\n" +
"4,5\n" +
"5,6\n";
compareResultAsTuples(result, expectedResult);
}
@Test
public void testWithStringValue() throws Exception {
/*
* Test mapVertices() and change the value type to String
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeData(env), env);
DataSet<Vertex<Long, String>> mappedVertices = graph.mapVertices(new ToStringMapper()).getVertices();
List<Vertex<Long, String>> result = mappedVertices.collect();
expectedResult = "1,one\n" +
"2,two\n" +
"3,three\n" +
"4,four\n" +
"5,five\n";
compareResultAsTuples(result, expectedResult);
}
@Test
public void testWithtuple1Value() throws Exception {
/*
* Test mapVertices() and change the value type to a Tuple1
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeData(env), env);
DataSet<Vertex<Long, Tuple1<Long>>> mappedVertices = graph.mapVertices(new ToTuple1Mapper()).getVertices();
List<Vertex<Long, Tuple1<Long>>> result = mappedVertices.collect();
expectedResult = "1,(1)\n" +
"2,(2)\n" +
"3,(3)\n" +
"4,(4)\n" +
"5,(5)\n";
compareResultAsTuples(result, expectedResult);
}
@Test
public void testWithCustomType() throws Exception {
/*
* Test mapVertices() and change the value type to a custom type
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeData(env), env);
DataSet<Vertex<Long, DummyCustomType>> mappedVertices = graph.mapVertices(new ToCustomTypeMapper()).getVertices();
List<Vertex<Long, DummyCustomType>> result = mappedVertices.collect();
expectedResult = "1,(T,1)\n" +
"2,(T,2)\n" +
"3,(T,3)\n" +
"4,(T,4)\n" +
"5,(T,5)\n";
compareResultAsTuples(result, expectedResult);
}
@Test
public void testWithCustomParametrizedType() throws Exception {
/*
* Test mapVertices() and change the value type to a parameterized custom type
*/
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
Graph<Long, Long, Long> graph = Graph.fromDataSet(TestGraphUtils.getLongLongVertexData(env),
TestGraphUtils.getLongLongEdgeData(env), env);
DataSet<Vertex<Long, DummyCustomParameterizedType<Double>>> mappedVertices = graph.mapVertices(
new ToCustomParametrizedTypeMapper()).getVertices();
List<Vertex<Long, DummyCustomParameterizedType<Double>>> result = mappedVertices.collect();
expectedResult = "1,(1.0,1)\n" +
"2,(2.0,2)\n" +
"3,(3.0,3)\n" +
"4,(4.0,4)\n" +
"5,(5.0,5)\n";
compareResultAsTuples(result, expectedResult);
}
@SuppressWarnings("serial")
private static final class AddOneMapper implements MapFunction<Vertex<Long, Long>, Long> {
public Long map(Vertex<Long, Long> value) throws Exception {
return value.getValue() + 1;
}
}
@SuppressWarnings("serial")
private static final class ToStringMapper implements MapFunction<Vertex<Long, Long>, String> {
public String map(Vertex<Long, Long> vertex) throws Exception {
String stringValue;
if (vertex.getValue() == 1) {
stringValue = "one";
} else if (vertex.getValue() == 2) {
stringValue = "two";
} else if (vertex.getValue() == 3) {
stringValue = "three";
} else if (vertex.getValue() == 4) {
stringValue = "four";
} else if (vertex.getValue() == 5) {
stringValue = "five";
} else {
stringValue = "";
}
return stringValue;
}
}
@SuppressWarnings("serial")
private static final class ToTuple1Mapper implements MapFunction<Vertex<Long, Long>, Tuple1<Long>> {
public Tuple1<Long> map(Vertex<Long, Long> vertex) throws Exception {
Tuple1<Long> tupleValue = new Tuple1<>();
tupleValue.setFields(vertex.getValue());
return tupleValue;
}
}
@SuppressWarnings("serial")
private static final class ToCustomTypeMapper implements MapFunction<Vertex<Long, Long>, DummyCustomType> {
public DummyCustomType map(Vertex<Long, Long> vertex) throws Exception {
DummyCustomType dummyValue = new DummyCustomType();
dummyValue.setIntField(vertex.getValue().intValue());
return dummyValue;
}
}
@SuppressWarnings("serial")
private static final class ToCustomParametrizedTypeMapper implements MapFunction<Vertex<Long, Long>,
DummyCustomParameterizedType<Double>> {
public DummyCustomParameterizedType<Double> map(Vertex<Long, Long> vertex) throws Exception {
DummyCustomParameterizedType<Double> dummyValue = new DummyCustomParameterizedType<>();
dummyValue.setIntField(vertex.getValue().intValue());
dummyValue.setTField(new Double(vertex.getValue()));
return dummyValue;
}
}
}