blob: 7b9619780448e1f12d41784cbae842079d508c75 (
plain)
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
|
/*
* Copyright 2017, OpenCensus Authors
*
* 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 io.opencensus.implcore.internal;
import io.opencensus.common.Function;
import javax.annotation.Nullable;
/*>>>
import org.checkerframework.checker.nullness.qual.KeyForBottom;
*/
/**
* Utility methods for suppressing nullness warnings and working around Checker Framework issues.
*/
public final class CheckerFrameworkUtils {
private CheckerFrameworkUtils() {}
/** Suppresses warnings about a nullable value. */
// TODO(sebright): Try to remove all uses of this method.
@SuppressWarnings("nullness")
public static <T> T castNonNull(@Nullable T arg) {
return arg;
}
/**
* Works around https://github.com/typetools/checker-framework/issues/1712 by removing {@code ?
* super} from a {@code Function}'s argument type.
*/
// TODO(sebright): Remove this method once the issue is fixed.
public static <A, B> Function<A, B> removeSuperFromFunctionParameterType(
Function<? super /*@KeyForBottom*/ A, B> function) {
@SuppressWarnings("unchecked")
Function<A, B> castFunction = (Function<A, B>) function;
return castFunction;
}
}
|
