Java Pipeline Class

Pipeline.java

public class Pipeline<T> {
    private final T value;

    public Pipeline(T value) {
        this.value = value;
    }

    public static <T> Pipeline<T> with(T value) {
        return new Pipeline<T>(value);
    }

    public<U> Pipeline<U> pipe(Function<? super T, ? extends U> mapper) {
        return  new Pipeline<U>(mapper.apply(value));
    }

    public T get() {
        return value;
    }
}

PipelineTest.java

public class PipelineTest {
    @Test public void usage() {
        String value = Pipeline.with(1)
                .pipe(e -> e.equals(1) ? "a" : "b")
                .get();
        assertEquals("a", value);
    }
}