| /* |
| * 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.core.construction; |
| |
| import com.google.protobuf.InvalidProtocolBufferException; |
| import java.io.IOException; |
| import org.apache.beam.sdk.coders.Coder; |
| import org.apache.beam.sdk.common.runner.v1.RunnerApi; |
| import org.apache.beam.sdk.values.PCollection; |
| import org.apache.beam.sdk.values.PCollection.IsBounded; |
| import org.apache.beam.sdk.values.WindowingStrategy; |
| |
| /** |
| * Utility methods for translating {@link PCollection PCollections} to and from Runner API protos. |
| */ |
| public class PCollections { |
| private PCollections() {} |
| |
| public static RunnerApi.PCollection toProto(PCollection<?> pCollection, SdkComponents components) |
| throws IOException { |
| String coderId = components.registerCoder(pCollection.getCoder()); |
| String windowingStrategyId = |
| components.registerWindowingStrategy(pCollection.getWindowingStrategy()); |
| // TODO: Display Data |
| |
| return RunnerApi.PCollection.newBuilder() |
| .setUniqueName(pCollection.getName()) |
| .setCoderId(coderId) |
| .setIsBounded(toProto(pCollection.isBounded())) |
| .setWindowingStrategyId(windowingStrategyId) |
| .build(); |
| } |
| |
| public static IsBounded isBounded(RunnerApi.PCollection pCollection) { |
| return fromProto(pCollection.getIsBounded()); |
| } |
| |
| public static Coder<?> getCoder( |
| RunnerApi.PCollection pCollection, RunnerApi.Components components) throws IOException { |
| return Coders.fromProto(components.getCodersOrThrow(pCollection.getCoderId()), components); |
| } |
| |
| public static WindowingStrategy<?, ?> getWindowingStrategy( |
| RunnerApi.PCollection pCollection, RunnerApi.Components components) |
| throws InvalidProtocolBufferException { |
| return WindowingStrategies.fromProto( |
| components.getWindowingStrategiesOrThrow(pCollection.getWindowingStrategyId()), components); |
| } |
| |
| private static RunnerApi.IsBounded toProto(IsBounded bounded) { |
| switch (bounded) { |
| case BOUNDED: |
| return RunnerApi.IsBounded.BOUNDED; |
| case UNBOUNDED: |
| return RunnerApi.IsBounded.UNBOUNDED; |
| default: |
| throw new IllegalArgumentException( |
| String.format("Unknown %s %s", IsBounded.class.getSimpleName(), bounded)); |
| } |
| } |
| |
| private static IsBounded fromProto(RunnerApi.IsBounded isBounded) { |
| switch (isBounded) { |
| case BOUNDED: |
| return IsBounded.BOUNDED; |
| case UNBOUNDED: |
| return IsBounded.UNBOUNDED; |
| case UNRECOGNIZED: |
| default: |
| // Whether or not this enum cannot be recognized by the proto (due to the version of the |
| // generated code we link to) or the switch hasn't been updated to handle it, |
| // the situation is the same: we don't know what this IsBounded means |
| throw new IllegalArgumentException( |
| String.format( |
| "Cannot convert unknown %s to %s: %s", |
| RunnerApi.IsBounded.class.getCanonicalName(), |
| IsBounded.class.getCanonicalName(), |
| isBounded)); |
| } |
| } |
| } |