content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * Licensed 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 androidx.test.espresso.remote;
  
  import static androidx.test.internal.util.Checks.checkNotNull;
  
  import androidx.annotation.NonNull;
  import com.google.protobuf.ByteString;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.ObjectOutputStream;
  import java.util.Locale;
  
  /** Converts a type T into its {@link ByteString} representation. */
  final class TypeToByteStringConverter<T> implements Converter<T, ByteString> {
    /**
     * Convert an object of type T into its {@link ByteString} representation.
     *
     * @param object to convert into a {@link ByteString}
     */
    @Override
    public ByteString convert(@NonNull T object) {
      checkNotNull(object, "object cannot be null!");
      ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
      ObjectOutputStream objectOutputStream = null;
      try {
        objectOutputStream = new ObjectOutputStream(byteArrayOutputStream);
        objectOutputStream.writeObject(object);
        return ByteString.copyFrom(byteArrayOutputStream.toByteArray());
      } catch (IOException ioe) {
        throw new RemoteProtocolException(
            String.format(
                Locale.ROOT,
                "Cannot write object of type: %s to ByteStream",
                object.getClass().getSimpleName()),
            ioe);
      } finally {
        try {
          if (objectOutputStream != null) {
            objectOutputStream.close();
          }
        } catch (IOException ex) {
          // ignore close exception
        }
      }
    }
  }
  