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// Copyright 2018 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.common.base.Preconditions;
import com.google.common.collect.ImmutableBiMap;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.CodedOutputStream;
import java.io.IOException;
/** Codec for {@link Class}. */
class ClassCodec implements ObjectCodec<Class<?>> {
@SuppressWarnings("unchecked")
@Override
public Class<Class<?>> getEncodedClass() {
return (Class<Class<?>>) (Object) Class.class;
}
@Override
public void serialize(SerializationContext context, Class<?> obj, CodedOutputStream codedOut)
throws SerializationException, IOException {
codedOut.writeBoolNoTag(obj.isPrimitive());
if (obj.isPrimitive()) {
codedOut.writeInt32NoTag(Preconditions.checkNotNull(PRIMITIVE_CLASS_INDEX_MAP.get(obj), obj));
} else {
context.serialize(obj.getName(), codedOut);
}
}
@Override
public Class<?> deserialize(DeserializationContext context, CodedInputStream codedIn)
throws SerializationException, IOException {
boolean isPrimitive = codedIn.readBool();
if (isPrimitive) {
return PRIMITIVE_CLASS_INDEX_MAP.inverse().get(codedIn.readInt32());
} else {
String className = context.deserialize(codedIn);
try {
return Class.forName(className);
} catch (ClassNotFoundException e) {
throw new SerializationException("Couldn't find class for " + className, e);
}
}
}
private static final ImmutableBiMap<Class<?>, Integer> PRIMITIVE_CLASS_INDEX_MAP =
ImmutableBiMap.<Class<?>, Integer>builder()
.put(byte.class, 1)
.put(short.class, 2)
.put(int.class, 3)
.put(long.class, 4)
.put(char.class, 5)
.put(float.class, 6)
.put(double.class, 7)
.put(boolean.class, 8)
.put(void.class, 9)
.build();
}
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