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Link Intersystems Commons Util (lis-commons-util) is collection of reusable software components that extend the standard java.util components.

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package com.link_intersystems.util.function;

import java.util.function.*;

/**
 * Provides utility methods to adapt {@link Function}, {@link Consumer}, {@link BiConsumer} and {@link Runnable}s
 * to {@link FunctionExecutor#exec(Runnable)} calls.
 */
public class FunctionExecutorAdapters {

    private FunctionExecutor functionExecutor;

    public FunctionExecutorAdapters(FunctionExecutor functionExecutor) {
        this.functionExecutor = functionExecutor;
    }

    public  Function adapter(Function function) {

        return t -> {
            FunctionRunnable functionRunnable = new FunctionRunnable<>(function, t);
            functionExecutor.exec(functionRunnable);
            return functionRunnable.getResult();
        };
    }

    public  BiFunction adapter(BiFunction function) {

        return (t, u) -> {
            BiFunctionRunnable functionRunnable = new BiFunctionRunnable<>(function, t, u);
            functionExecutor.exec(functionRunnable);
            return functionRunnable.getResult();
        };
    }

    public  BiConsumer adapter(BiConsumer consumer) {

        return (t, u) -> functionExecutor.exec(consumer, t, u);
    }

    public  Consumer adapter(BiConsumer consumer, U arg) {
        return adapter(consumer, (Supplier) () -> arg);

    }

    public  Consumer adapter(BiConsumer consumer, Supplier argSupplier) {

        return t -> functionExecutor.exec(consumer, t, argSupplier.get());
    }

    public  Consumer adapter(Consumer consumer) {

        return t -> functionExecutor.exec(consumer, t);
    }

    public Runnable adapter(Runnable runnable) {
        return () -> functionExecutor.exec(runnable::run);
    }

}