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// Copyright (C) 2018 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 com.google.gerrit.server.cache.serialize;
import com.google.gerrit.common.Nullable;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
/**
* Serializer that uses default Java serialization.
*
* <p>Unlike most {@link CacheSerializer} implementations, serializing null is supported.
*
* @param <T> type to serialize. Must implement {@code Serializable}, but due to implementation
* details this is only checked at runtime.
*/
public class JavaCacheSerializer<T> implements CacheSerializer<T> {
@Override
public byte[] serialize(@Nullable T object) {
try (ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(bout)) {
oout.writeObject(object);
oout.flush();
return bout.toByteArray();
} catch (IOException e) {
throw new IllegalArgumentException("Failed to serialize object", e);
}
}
@SuppressWarnings({"unchecked", "BanSerializableRead"})
@Override
public T deserialize(byte[] in) {
Object object;
try (ByteArrayInputStream bin = new ByteArrayInputStream(in);
ObjectInputStream oin = new ObjectInputStream(bin)) {
object = oin.readObject();
} catch (ClassNotFoundException | IOException e) {
throw new IllegalArgumentException("Failed to deserialize object", e);
}
return (T) object;
}
}