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package jedi.functors;

import jedi.functional.Functor;
import jedi.functional.Functor2;

public class ComposeableFunctor2 implements Functor2 {
    private final Functor2 functor;

    public ComposeableFunctor2(final Functor2 functor) {
        this.functor = functor;
    }

    public R execute(final T t, final U u) {
        return functor.execute(t, u);
    }

    /**
     * Function composition: this.andThen(g) applied to (t, u) == g(this.execute(t, u))
     */
    public  ComposeableFunctor2 andThen(final Functor g) {
        return new ComposeableFunctor2(new Functor2() {
            public NEW_R execute(T t, U u) {
                return g.execute(functor.execute(t, u));
            }
        });
    }
}