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.runners.core.serialization;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.io.Serializable;
  import java.util.Base64;
  
  /** A utility class for serializing and deserializing Java objects into a Base64 string. */
  public class Base64Serializer {
    private Base64Serializer() {}
  
    public static String serializeUnchecked(Serializable serializable) {
      try {
        return serialize(serializable);
      } catch (IOException e) {
        throw new RuntimeException(e);
      }
    }
  
    public static <T> T deserializeUnchecked(String serialized, Class<T> klass) {
      try {
        return deserialize(serialized, klass);
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }
  
    @SuppressWarnings("unused") // used to deserialize on the correct casts
    private static <T> T deserialize(String serialized, Class<T> klass)
        throws IOException, ClassNotFoundException {
      final byte[] bytes = Base64.getDecoder().decode(serialized);
      final ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes));
      @SuppressWarnings("unchecked")
      T object = (T) ois.readObject();
      ois.close();
      return object;
    }
  
    private static String serialize(Serializable serializable) throws IOException {
      final ByteArrayOutputStream baos = new ByteArrayOutputStream();
      final ObjectOutputStream oos = new ObjectOutputStream(baos);
      oos.writeObject(serializable);
      oos.close();
      return Base64.getEncoder().encodeToString(baos.toByteArray());
    }
  }
  