mirror of
https://github.com/funkemunky/AntiVPN.git
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Dawson Hessler
9dc312186b
- Fixed H2 database error on index creation when loading plugin by using dynamic library downloader/loader from Lucko's Helper. - Shrunk jar file size extensively so it can be uploaded to Spigot directly. - Updated h2database driver to 2.1.214 to patch vulnerability - Updated mysql database driver to 8.0.30 to patch vulnerability - Updated MongoDB java driver to 3.12.11.
54 lines
2.9 KiB
Java
54 lines
2.9 KiB
Java
/*
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* Copyright (C) 2021 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
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* in compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under the License
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* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing permissions and limitations under
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* the License.
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*/
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package dev.brighten.antivpn.utils;
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/** A utility method to perform unchecked casts to suppress errors produced by nullness analyses. */
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final class NullnessCasts {
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/**
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* Accepts a {@code @Nullable T} and returns a plain {@code T}, without performing any check that
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* that conversion is safe.
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*
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* <p>This method is intended to help with usages of type parameters that have {
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* ParametricNullness parametric nullness}. If a type parameter instead ranges over only non-null
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* types (or if the type is a non-variable type, like {@code String}), then code should almost
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* never use this method, preferring instead to call {@code requireNonNull} so as to benefit from
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* its runtime check.
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*
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* <p>An example use case for this method is in implementing an {@code Iterator<T>} whose {@code
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* next} field is lazily initialized. The type of that field would be {@code @Nullable T}, and the
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* code would be responsible for populating a "real" {@code T} (which might still be the value
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* {@code null}!) before returning it to callers. Depending on how the code is structured, a
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* nullness analysis might not understand that the field has been populated. To avoid that problem
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* without having to add {@code @SuppressWarnings}, the code can call this method.
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*
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* <p>Why <i>not</i> just add {@code SuppressWarnings}? The problem is that this method is
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* typically useful for {@code return} statements. That leaves the code with two options: Either
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* add the suppression to the whole method (which turns off checking for a large section of code),
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* or extract a variable, and put the suppression on that. However, a local variable typically
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* doesn't work: Because nullness analyses typically infer the nullness of local variables,
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* there's no way to assign a {@code @Nullable T} to a field {@code T foo;} and instruct the
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* analysis that that means "plain {@code T}" rather than the inferred type {@code @Nullable T}.
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* (Even if supported added {@code @NonNull}, that would not help, since the problem case
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* addressed by this method is the case in which {@code T} has parametric nullness -- and thus its
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* value may be legitimately {@code null}.)
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*/
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@SuppressWarnings("nullness")
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static <T extends Object> T uncheckedCastNullableTToT(T t) {
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return t;
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}
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private NullnessCasts() {}
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}
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