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[FLINK-2576] [javaAPI] [scalaAPI] [optimizer] Add outerJoin to DataSe…
…t API (Java, Scala) and optimizer. This closes apache#1138
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...-core/src/main/java/org/apache/flink/api/common/operators/base/InnerJoinOperatorBase.java
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| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.flink.api.common.operators.base; | ||
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| import org.apache.flink.api.common.ExecutionConfig; | ||
| import org.apache.flink.api.common.functions.FlatJoinFunction; | ||
| import org.apache.flink.api.common.functions.RuntimeContext; | ||
| import org.apache.flink.api.common.functions.util.CopyingListCollector; | ||
| import org.apache.flink.api.common.functions.util.FunctionUtils; | ||
| import org.apache.flink.api.common.operators.BinaryOperatorInformation; | ||
| import org.apache.flink.api.common.operators.util.UserCodeClassWrapper; | ||
| import org.apache.flink.api.common.operators.util.UserCodeObjectWrapper; | ||
| import org.apache.flink.api.common.operators.util.UserCodeWrapper; | ||
| import org.apache.flink.api.common.typeinfo.AtomicType; | ||
| import org.apache.flink.api.common.typeinfo.TypeInformation; | ||
| import org.apache.flink.api.common.typeutils.CompositeType; | ||
| import org.apache.flink.api.common.typeutils.GenericPairComparator; | ||
| import org.apache.flink.api.common.typeutils.TypeComparator; | ||
| import org.apache.flink.api.common.typeutils.TypePairComparator; | ||
| import org.apache.flink.api.common.typeutils.TypeSerializer; | ||
| import org.apache.flink.util.Collector; | ||
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| import java.util.ArrayList; | ||
| import java.util.Arrays; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| /** | ||
| * @see org.apache.flink.api.common.functions.FlatJoinFunction | ||
| */ | ||
| public class InnerJoinOperatorBase<IN1, IN2, OUT, FT extends FlatJoinFunction<IN1, IN2, OUT>> extends JoinOperatorBase<IN1, IN2, OUT, FT> { | ||
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| public InnerJoinOperatorBase(UserCodeWrapper<FT> udf, BinaryOperatorInformation<IN1, IN2, OUT> operatorInfo, | ||
| int[] keyPositions1, int[] keyPositions2, String name) { | ||
| super(udf, operatorInfo, keyPositions1, keyPositions2, name); | ||
| } | ||
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| public InnerJoinOperatorBase(FT udf, BinaryOperatorInformation<IN1, IN2, OUT> operatorInfo, int[] keyPositions1, | ||
| int[] keyPositions2, String name) { | ||
| super(new UserCodeObjectWrapper<FT>(udf), operatorInfo, keyPositions1, keyPositions2, name); | ||
| } | ||
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| public InnerJoinOperatorBase(Class<? extends FT> udf, BinaryOperatorInformation<IN1, IN2, OUT> operatorInfo, | ||
| int[] keyPositions1, int[] keyPositions2, String name) { | ||
| super(new UserCodeClassWrapper<FT>(udf), operatorInfo, keyPositions1, keyPositions2, name); | ||
| } | ||
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| // -------------------------------------------------------------------------------------------- | ||
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| @SuppressWarnings("unchecked") | ||
| @Override | ||
| protected List<OUT> executeOnCollections(List<IN1> inputData1, List<IN2> inputData2, RuntimeContext runtimeContext, | ||
| ExecutionConfig executionConfig) throws Exception { | ||
| FlatJoinFunction<IN1, IN2, OUT> function = userFunction.getUserCodeObject(); | ||
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| FunctionUtils.setFunctionRuntimeContext(function, runtimeContext); | ||
| FunctionUtils.openFunction(function, this.parameters); | ||
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| TypeInformation<IN1> leftInformation = getOperatorInfo().getFirstInputType(); | ||
| TypeInformation<IN2> rightInformation = getOperatorInfo().getSecondInputType(); | ||
| TypeInformation<OUT> outInformation = getOperatorInfo().getOutputType(); | ||
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| TypeSerializer<IN1> leftSerializer = leftInformation.createSerializer(executionConfig); | ||
| TypeSerializer<IN2> rightSerializer = rightInformation.createSerializer(executionConfig); | ||
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| TypeComparator<IN1> leftComparator; | ||
| TypeComparator<IN2> rightComparator; | ||
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| if (leftInformation instanceof AtomicType) { | ||
| leftComparator = ((AtomicType<IN1>) leftInformation).createComparator(true, executionConfig); | ||
| } else if (leftInformation instanceof CompositeType) { | ||
| int[] keyPositions = getKeyColumns(0); | ||
| boolean[] orders = new boolean[keyPositions.length]; | ||
| Arrays.fill(orders, true); | ||
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| leftComparator = ((CompositeType<IN1>) leftInformation).createComparator(keyPositions, orders, 0, executionConfig); | ||
| } else { | ||
| throw new RuntimeException("Type information for left input of type " + leftInformation.getClass() | ||
| .getCanonicalName() + " is not supported. Could not generate a comparator."); | ||
| } | ||
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| if (rightInformation instanceof AtomicType) { | ||
| rightComparator = ((AtomicType<IN2>) rightInformation).createComparator(true, executionConfig); | ||
| } else if (rightInformation instanceof CompositeType) { | ||
| int[] keyPositions = getKeyColumns(1); | ||
| boolean[] orders = new boolean[keyPositions.length]; | ||
| Arrays.fill(orders, true); | ||
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| rightComparator = ((CompositeType<IN2>) rightInformation).createComparator(keyPositions, orders, 0, executionConfig); | ||
| } else { | ||
| throw new RuntimeException("Type information for right input of type " + rightInformation.getClass() | ||
| .getCanonicalName() + " is not supported. Could not generate a comparator."); | ||
| } | ||
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| TypePairComparator<IN1, IN2> pairComparator = new GenericPairComparator<IN1, IN2>(leftComparator, rightComparator); | ||
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| List<OUT> result = new ArrayList<OUT>(); | ||
| Collector<OUT> collector = new CopyingListCollector<OUT>(result, outInformation.createSerializer(executionConfig)); | ||
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| Map<Integer, List<IN2>> probeTable = new HashMap<Integer, List<IN2>>(); | ||
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| //Build hash table | ||
| for (IN2 element : inputData2) { | ||
| List<IN2> list = probeTable.get(rightComparator.hash(element)); | ||
| if (list == null) { | ||
| list = new ArrayList<IN2>(); | ||
| probeTable.put(rightComparator.hash(element), list); | ||
| } | ||
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| list.add(element); | ||
| } | ||
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| //Probing | ||
| for (IN1 left : inputData1) { | ||
| List<IN2> matchingHashes = probeTable.get(leftComparator.hash(left)); | ||
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| if (matchingHashes != null) { | ||
| pairComparator.setReference(left); | ||
| for (IN2 right : matchingHashes) { | ||
| if (pairComparator.equalToReference(right)) { | ||
| function.join(leftSerializer.copy(left), rightSerializer.copy(right), collector); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| FunctionUtils.closeFunction(function); | ||
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| return result; | ||
| } | ||
| } |
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