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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.Predicates;
import com.google.common.base.Supplier;
import com.google.common.base.Suppliers;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Ordering;
import java.io.IOException;
import java.util.Comparator;
/**
* A lazy, automatically populated registry.
*
* <p>Must not be accessed by any {@link CodecRegisterer} or {@link ObjectCodec} constructors or
* static initializers.
*/
public class AutoRegistry {
private static final Supplier<ObjectCodecRegistry> SUPPLIER =
Suppliers.memoize(AutoRegistry::create);
/* Common ancestor of common.google.devtools.build and com.google.devtools.common.options,
* where Tristate lives. */
private static final String PACKAGE_PREFIX = "com.google.devtools";
/** Class name prefixes to blacklist for {@link DynamicCodec}. */
private static final ImmutableList<String> CLASS_NAME_PREFIX_BLACKLIST =
ImmutableList.of(
"com.google.devtools.build.lib.vfs",
"com.google.devtools.build.lib.actions.ArtifactFactory",
"com.google.devtools.build.lib.packages.PackageFactory$BuiltInRuleFunction");
/** Classes outside {@link AutoRegistry#PACKAGE_PREFIX} that need to be serialized. */
private static final ImmutableList<String> EXTERNAL_CLASS_NAMES_TO_REGISTER =
ImmutableList.of(
"java.io.FileNotFoundException",
"java.io.IOException",
"java.lang.invoke.SerializedLambda",
"com.google.common.base.Predicates$InPredicate",
// Sadly, these builders are serialized as part of SkylarkCustomCommandLine$Builder, which
// apparently can be preserved through analysis. We may investigate if this actually has
// performance/correctness implications.
"com.google.common.collect.ImmutableList$Builder");
private static final ImmutableList<Object> REFERENCE_CONSTANTS_TO_REGISTER =
ImmutableList.of(
Predicates.alwaysTrue(),
Predicates.alwaysFalse(),
Predicates.isNull(),
Predicates.notNull(),
ImmutableList.of(),
ImmutableSet.of(),
Comparator.naturalOrder(),
Ordering.natural());
public static ObjectCodecRegistry get() {
return SUPPLIER.get();
}
private static ObjectCodecRegistry create() {
try {
ObjectCodecRegistry.Builder registry = CodecScanner.initializeCodecRegistry(PACKAGE_PREFIX);
for (String className : EXTERNAL_CLASS_NAMES_TO_REGISTER) {
registry.addClassName(className);
}
for (Object constant : REFERENCE_CONSTANTS_TO_REGISTER) {
registry.addReferenceConstant(constant);
}
for (String classNamePrefix : CLASS_NAME_PREFIX_BLACKLIST) {
registry.blacklistClassNamePrefix(classNamePrefix);
}
return registry.build();
} catch (IOException | ReflectiveOperationException e) {
throw new IllegalStateException(e);
}
}
}
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