/*
* 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);
}