| /* |
| * 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.beam.runners.direct; |
| |
| import org.apache.beam.runners.core.construction.PTransformReplacements; |
| import org.apache.beam.runners.core.construction.SingleInputOutputOverrideFactory; |
| import org.apache.beam.sdk.runners.AppliedPTransform; |
| import org.apache.beam.sdk.runners.PTransformOverrideFactory; |
| import org.apache.beam.sdk.transforms.GroupByKey; |
| import org.apache.beam.sdk.transforms.PTransform; |
| import org.apache.beam.sdk.values.KV; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.Iterables; |
| |
| /** A {@link PTransformOverrideFactory} for {@link GroupByKey} PTransforms. */ |
| final class DirectGroupByKeyOverrideFactory<K, V> |
| extends SingleInputOutputOverrideFactory< |
| PCollection<KV<K, V>>, |
| PCollection<KV<K, Iterable<V>>>, |
| PTransform<PCollection<KV<K, V>>, PCollection<KV<K, Iterable<V>>>>> { |
| @Override |
| public PTransformReplacement<PCollection<KV<K, V>>, PCollection<KV<K, Iterable<V>>>> |
| getReplacementTransform( |
| AppliedPTransform< |
| PCollection<KV<K, V>>, |
| PCollection<KV<K, Iterable<V>>>, |
| PTransform<PCollection<KV<K, V>>, PCollection<KV<K, Iterable<V>>>>> |
| transform) { |
| |
| PCollection<KV<K, Iterable<V>>> output = |
| (PCollection<KV<K, Iterable<V>>>) Iterables.getOnlyElement(transform.getOutputs().values()); |
| |
| return PTransformReplacement.of( |
| PTransformReplacements.getSingletonMainInput(transform), |
| new DirectGroupByKey<>(transform.getTransform(), output.getWindowingStrategy())); |
| } |
| } |