TypeToByteStringConverter.java
/*
* 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 com.google.common.base.Preconditions.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
}
}
}
}