| /* |
| * 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.nemo.compiler.frontend.beam.transform; |
| |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.apache.beam.sdk.values.PInput; |
| import org.apache.beam.sdk.values.POutput; |
| |
| import java.io.Serializable; |
| |
| /** |
| * A composite transform for wrapping transforms inside a loop to create loop operators in the IR. |
| * Each iterations are stateless, as the repeating iterations are zipped into a single copy. |
| * We assume a single {@link LoopCompositeTransform} inside a for/while loop. |
| * |
| * @param <inputT> input type of the composite transform. |
| * @param <outputT> output type of the composite transform. |
| */ |
| public abstract class LoopCompositeTransform<inputT extends PInput, outputT extends POutput> |
| extends PTransform<inputT, outputT> implements Serializable { |
| } |