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.Collections;
  import java.util.List;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /**
   * A {@link Coder} that has no component {@link Coder Coders} or other configuration.
   *
   * <p>Unless the behavior is overridden, atomic coders are presumed to be deterministic.
   *
   * <p>All atomic coders of the same class are considered to be equal to each other. As a result, an
   * {@link AtomicCoder} should have no associated configuration (instance variables, etc).
   *
   * @param <T> the type of the values being transcoded
   */
  public abstract class AtomicCoder<T> extends StructuredCoder<T> {
    /**
     * {@inheritDoc}.
     *
     * <p>Unless overridden, does not throw. An {@link AtomicCoder} is presumed to be deterministic
     *
     * @throws NonDeterministicException if overridden to indicate that this subclass of {@link
     *     AtomicCoder} is not deterministic
     */
    @Override
    public void verifyDeterministic() throws NonDeterministicException {}
  
    /**
     * {@inheritDoc}.
     *
     * @return the empty list
     */
    @Override
    public List<? extends Coder<?>> getCoderArguments() {
      return Collections.emptyList();
    }
  
    /**
     * {@inheritDoc}.
     *
     * @return the empty {@link List}.
     */
    @Override
    public final List<? extends Coder<?>> getComponents() {
      return Collections.emptyList();
    }
  
    /**
     * {@inheritDoc}.
     *
     * @return true if the other object has the same class as this {@link AtomicCoder}.
     */
    @Override
    public final boolean equals(@Nullable Object other) {
      return other != null && this.getClass().equals(other.getClass());
    }
  
    /**
     * {@inheritDoc}.
     *
     * @return the {@link #hashCode()} of the {@link Class} of this {@link AtomicCoder}.
     */
    @Override
    public final int hashCode() {
      return this.getClass().hashCode();
    }
  }
  