com.github.sseserver.util.LambdaUtil Maven / Gradle / Ivy

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package com.github.sseserver.util;

import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.function.Supplier;

public class LambdaUtil {

    public static  void sneakyThrows(Throwable t) throws E {
        throw (E) t;
    }

    public static  Function noop() {
        return o -> o;
    }

    public static Supplier defaultFalse() {
        return () -> Boolean.FALSE;
    }

    public static  Supplier defaultNull() {
        return () -> null;
    }

    public static Supplier defaultZero() {
        return () -> 0;
    }

    public static  BiFunction filterNull() {
        return (o1, o2) -> o1 != null ? o1 : o2;
    }

    public static , E> BiFunction reduceList() {
        return (o1, o2) -> {
            o1.addAll(o2);
            return o1;
        };
    }

    public static > Function> distinct() {
        return o -> new ArrayList<>(new LinkedHashSet<>(o));
    }
}