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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.lib.skyframe.serialization;
import com.google.protobuf.ByteString;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.CodedOutputStream;
import com.google.protobuf.MessageLite;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.nio.ByteBuffer;
/** Naive ObjectCodec using Java native Serialization. Not performant, but a good fallback */
class JavaSerializableCodec implements ObjectCodec<Object> {
private boolean isBlacklistedForJavaSerialization(Class<?> clazz) {
return MessageLite.class.isAssignableFrom(clazz);
}
@Override
public Class<Object> getEncodedClass() {
return Object.class;
}
@Override
public void serialize(SerializationContext context, Object obj, CodedOutputStream codedOut)
throws SerializationException, IOException {
if (isBlacklistedForJavaSerialization(obj.getClass())) {
throw new SerializationException(
"Java serialization is not permitted for class " + obj.getClass());
}
ByteString.Output out = ByteString.newOutput();
ObjectOutputStream objOut = new ObjectOutputStream(out);
try {
objOut.writeObject(obj);
} catch (NotSerializableException e) {
Class<?> clazz = obj.getClass();
Class<?> parentClass = null;
if (clazz.isAnonymousClass() || clazz.isSynthetic()) {
parentClass = clazz.getSuperclass();
}
throw new SerializationException.NoCodecException(
"Object "
+ obj
+ " of type "
+ obj.getClass()
+ (parentClass == null ? "" : " (parent " + parentClass + ")")
+ " not serializable",
e);
} catch (NotSerializableRuntimeException e) {
// Values that inherit from Serializable but actually aren't serializable.
throw new SerializationException.NoCodecException(
"Object " + obj + " of type " + obj.getClass() + " not serializable", e);
}
codedOut.writeBytesNoTag(out.toByteString());
}
@Override
public Object deserialize(DeserializationContext context, CodedInputStream codedIn)
throws SerializationException, IOException {
try {
// Get the ByteBuffer as it is potentially a view of the underlying bytes (not a copy), which
// is more efficient.
ByteBuffer buffer = codedIn.readByteBuffer();
ObjectInputStream objIn =
new ObjectInputStream(
new ByteArrayInputStream(buffer.array(), buffer.arrayOffset(), buffer.remaining()));
return objIn.readObject();
} catch (ClassNotFoundException e) {
throw new SerializationException("Java deserialization failed", e);
}
}
/** Disables auto-registration. */
private static class JavaSerializableCodecRegisterer
implements CodecRegisterer<JavaSerializableCodec> {}
}
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