Blogger - FPOWJPWB - Function1

/**
 * Generic 1-arg function type.
 */
public abstract class Function1<A, B> {
    /**
     * Transform <code>A</code> to <code>B</code>.
     *
     * @param a <code>A</code> to transform
     * @return result of the transformation
     */
    public abstract B apply(A a) throws Exception;
}