| /* |
| * 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.wayang.java.operators; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| import org.apache.wayang.basic.data.Tuple2; |
| import org.apache.wayang.basic.function.ProjectionDescriptor; |
| import org.apache.wayang.core.types.DataSetType; |
| import org.apache.wayang.core.types.DataUnitType; |
| import org.apache.wayang.java.channels.JavaChannelInstance; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| /** |
| * Test suite for {@link JavaJoinOperator}. |
| */ |
| public class JavaJoinOperatorTest extends JavaExecutionOperatorTestBase { |
| |
| @Test |
| public void testExecution() { |
| // Prepare test data. |
| Stream<Tuple2<Integer, String>> inputStream0 = Arrays.asList( |
| new Tuple2<>(1, "b"), new Tuple2<>(1, "c"), new Tuple2<>(2, "d"), new Tuple2<>(3, "e") |
| ).stream(); |
| Stream<Tuple2<String, Integer>> inputStream1 = Arrays.asList( |
| new Tuple2<>("x", 1), new Tuple2<>("y", 1), new Tuple2<>("z", 2), new Tuple2<>("w", 4) |
| ).stream(); |
| |
| // Build the Cartesian operator. |
| JavaJoinOperator<Tuple2<Integer, String>, Tuple2<String, Integer>, Integer> join = |
| new JavaJoinOperator<>( |
| DataSetType.createDefaultUnchecked(Tuple2.class), |
| DataSetType.createDefaultUnchecked(Tuple2.class), |
| new ProjectionDescriptor<>( |
| DataUnitType.createBasicUnchecked(Tuple2.class), |
| DataUnitType.createBasic(Integer.class), |
| "field0"), |
| new ProjectionDescriptor<>( |
| DataUnitType.createBasicUnchecked(Tuple2.class), |
| DataUnitType.createBasic(Integer.class), |
| "field1")); |
| |
| // Execute. |
| JavaChannelInstance[] inputs = new JavaChannelInstance[]{ |
| createStreamChannelInstance(inputStream0), |
| createStreamChannelInstance(inputStream1) |
| }; |
| JavaChannelInstance[] outputs = new JavaChannelInstance[]{createStreamChannelInstance()}; |
| evaluate(join, inputs, outputs); |
| |
| // Verify the outcome. |
| final List<Tuple2<Tuple2<Integer, String>, Tuple2<String, Integer>>> result = |
| outputs[0].<Tuple2<Tuple2<Integer, String>, Tuple2<String, Integer>>>provideStream() |
| .collect(Collectors.toList()); |
| Collections.sort(result, (joinTuple1, joinTuple2) -> { |
| int cmp = joinTuple1.getField0().getField0().compareTo(joinTuple2.getField0().getField0()); |
| if (cmp == 0) { |
| cmp = joinTuple1.getField0().getField1().compareTo(joinTuple2.getField0().getField1()); |
| } |
| if (cmp == 0) { |
| cmp = joinTuple1.getField1().getField0().compareTo(joinTuple2.getField1().getField0()); |
| } |
| if (cmp == 0) { |
| cmp = joinTuple1.getField1().getField1().compareTo(joinTuple2.getField1().getField1()); |
| } |
| return cmp; |
| }); |
| final List<Tuple2<Tuple2<Integer, String>, Tuple2<String, Integer>>> expectedResult = Arrays.asList( |
| new Tuple2<>(new Tuple2<>(1, "b"), new Tuple2<>("x", 1)), |
| new Tuple2<>(new Tuple2<>(1, "b"), new Tuple2<>("y", 1)), |
| new Tuple2<>(new Tuple2<>(1, "c"), new Tuple2<>("x", 1)), |
| new Tuple2<>(new Tuple2<>(1, "c"), new Tuple2<>("y", 1)), |
| new Tuple2<>(new Tuple2<>(2, "d"), new Tuple2<>("z", 2)) |
| ); |
| |
| Assert.assertEquals(expectedResult, result); |
| |
| |
| } |
| |
| } |