| /* |
| * 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 java.util.List; |
| import org.apache.beam.sdk.annotations.Experimental; |
| import org.apache.beam.sdk.annotations.Experimental.Kind; |
| import org.apache.beam.sdk.coders.Coder; |
| |
| /** |
| * An interface that translates coders to components and back. |
| * |
| * <p>This interface is highly experimental, and incomplete. Coders must in the general case have |
| * the capability to encode an additional payload, which is not currently supported. This exists as |
| * a temporary measure. |
| */ |
| @Experimental(Kind.CORE_RUNNERS_ONLY) |
| public interface CoderTranslator<T extends Coder<?>> { |
| /** |
| * Extract all component {@link Coder coders} within a coder. |
| */ |
| List<? extends Coder<?>> getComponents(T from); |
| |
| /** |
| * Create a {@link Coder} from its component {@link Coder coders}. |
| */ |
| T fromComponents(List<Coder<?>> components); |
| } |