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.extensions.ml;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import org.apache.beam.sdk.coders.AtomicCoder;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.coders.CoderException;
  
  public abstract class DelegatingAtomicCoder<X, W> extends AtomicCoder<X> {
  
    private final Coder<W> delegate;
  
    protected DelegatingAtomicCoder(Coder<W> delegate) {
      this.delegate = delegate;
    }
  
    @Override
    public final X decode(InputStream inStream) throws CoderException, IOException {
      return from(delegate.decode(inStream));
    }
  
    @Override
    public final void encode(X value, OutputStream outStream) throws CoderException, IOException {
      delegate.encode(to(value), outStream);
    }
  
    protected abstract X from(W object) throws CoderException, IOException;
  
    @Override
    public void verifyDeterministic() throws NonDeterministicException {
      delegate.verifyDeterministic();
    }
  
    protected abstract W to(X object) throws CoderException, IOException;
  }
  