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/*
* Copyright (C) 2022 NotEnoughUpdates contributors
*
* This file is part of NotEnoughUpdates.
*
* NotEnoughUpdates is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later version.
*
* NotEnoughUpdates is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with NotEnoughUpdates. If not, see <https://www.gnu.org/licenses/>.
*/
package io.github.moulberry.notenoughupdates.util;
import com.google.common.base.Objects;
import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.function.Supplier;
public interface AsyncDependencyLoader<T> {
Optional<T> peekValue();
public static <R, T> AsyncDependencyLoader<T> withObjectIdentity(
Supplier<R> supplier,
Function<R, CompletableFuture<T>> generator
) {
return new AsyncDependencyLoaderImpl<>(supplier, generator, (a, b) -> a != b);
}
public static <R, T> AsyncDependencyLoader<T> withEqualsInvocation(
Supplier<R> supplier,
Function<R, CompletableFuture<T>> generator
) {
return new AsyncDependencyLoaderImpl<>(supplier, generator, (a, b) -> !Objects.equal(a, b));
}
public static <R, T> AsyncDependencyLoader<T> withEqualityFunction(
Supplier<R> supplier,
Function<R, CompletableFuture<T>> generator,
BiFunction<R, R, Boolean> isEqual
) {
return new AsyncDependencyLoaderImpl<>(supplier, generator, (a, b) -> !isEqual.apply(a, b));
}
}
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