content: /*
   * 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.sdk.coders;
  
  import java.util.List;
  import org.apache.beam.sdk.values.TypeDescriptor;
  
  /**
   * A {@link CoderProvider} provides {@link Coder}s.
   *
   * <p>It may operate on a parameterized type, such as {@link List}, in which case the {@link
   * #coderFor} method accepts a list of coders to use for the type parameters.
   */
  public abstract class CoderProvider {
  
    /**
     * Returns a {@code Coder<T>} to use for values of a particular type, given the Coders for each of
     * the type's generic parameter types.
     *
     * <p>Throws {@link CannotProvideCoderException} if this {@link CoderProvider} cannot provide a
     * coder for this type and components.
     */
    public abstract <T> Coder<T> coderFor(
        TypeDescriptor<T> typeDescriptor, List<? extends Coder<?>> componentCoders)
        throws CannotProvideCoderException;
  }
  