1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
// 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.serializers;
import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.Serializer;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Sets;
import java.lang.reflect.Field;
import java.util.NavigableSet;
import java.util.TreeSet;
/** A {@link Serializer} for {@link ImmutableSortedSet}. */
class UnmodifiableNavigableSetSerializer extends Serializer<NavigableSet<?>> {
private final Field delegate;
private UnmodifiableNavigableSetSerializer() {
setImmutable(true);
try {
Class<?> clazz = Class.forName(Sets.class.getCanonicalName() + "$UnmodifiableNavigableSet");
delegate = clazz.getDeclaredField("delegate");
delegate.setAccessible(true);
} catch (ReflectiveOperationException e) {
throw new IllegalStateException("Issues reflectively writing UnmodifiableNavigableSet", e);
}
}
private Object getDelegateFromUnmodifiableNavigableSet(NavigableSet<?> object) {
try {
return delegate.get(object);
} catch (IllegalAccessException e) {
throw new IllegalStateException("Issues reflectively writing UnmodifiableNavigableSet", e);
}
}
@Override
public void write(Kryo kryo, Output output, NavigableSet<?> object) {
// We want to preserve the underlying delegate class, so we need to reflectively get it and
// write it directly via kryo
kryo.writeClassAndObject(output, getDelegateFromUnmodifiableNavigableSet(object));
}
@Override
public NavigableSet<?> read(Kryo kryo, Input input, Class<NavigableSet<?>> type) {
return Sets.unmodifiableNavigableSet((NavigableSet<?>) kryo.readClassAndObject(input));
}
static void registerSerializers(Kryo kryo) {
kryo.register(getSerializedClass(), new UnmodifiableNavigableSetSerializer());
}
@VisibleForTesting
static @SuppressWarnings("rawtypes") Class<? extends NavigableSet> getSerializedClass() {
return Sets.unmodifiableNavigableSet(new TreeSet<Object>()).getClass();
}
}
|
