mirror of https://github.com/bvn13/jmonad.git
52 lines
1.3 KiB
Java
52 lines
1.3 KiB
Java
package com.bvn13.jmonad;
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import java.util.Objects;
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import java.util.Optional;
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import java.util.function.Function;
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import java.util.function.Supplier;
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/**
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* Full implementation of Try monad
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* @see <a href="https://medium.com/swlh/write-a-monad-in-java-seriously-50a9047c9839">Source article</a>
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*
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* Created by bvn13 on 10.06.2019.
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*/
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public abstract class Try<T> {
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public static <U> Try<U> ofThrowable(Supplier<U> f) {
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Objects.requireNonNull(f);
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try {
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return Try.successful(f.get());
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} catch (Throwable e) {
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return Try.failure(e);
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}
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}
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public static <U> Success<U> successful(U u) {
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return new Success<>(u);
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}
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public static <U> Failure<U> failure(Throwable e) {
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return new Failure<>(e);
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}
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public abstract T get() throws Throwable;
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public abstract T orElse(T value);
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public abstract <U> Try<U> flatMap(Function<? super T, ? extends U> f);
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public abstract Try<T> filter(Function<? super T, ? extends Boolean> f);
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public abstract Try<T> map(Function<? super T, ? extends T> f);
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public abstract T orElseThrow(Throwable e) throws Throwable;
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public abstract T orElseThrow() throws Throwable;
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public abstract Optional<T> toOptional();
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public abstract boolean isSuccess();
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}
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