function

type AbstractFunction struct {
	class.Class
}

type Function interface {
	/**
	 * Applies this function to the given argument.
	 *
	 * @param t the function argument
	 * @return the function result
	 */
	Apply(t interface{}) interface{}

	/**
	 * Returns a composed function that first applies the {@code before}
	 * function to its input, and then applies this function to the result.
	 * If evaluation of either function throws an exception, it is relayed to
	 * the caller of the composed function.
	 *
	 * @param <V> the type of input to the {@code before} function, and to the
	 *           composed function
	 * @param before the function to apply before this function is applied
	 * @return a composed function that first applies the {@code before}
	 * function and then applies this function
	 * @throws NullPointerException if before is null
	 *
	 * @see #andThen(Function)
	 */
	Compose(before Function) Function

	/**
	 * Returns a composed function that first applies this function to
	 * its input, and then applies the {@code after} function to the result.
	 * If evaluation of either function throws an exception, it is relayed to
	 * the caller of the composed function.
	 *
	 * @param <V> the type of output of the {@code after} function, and of the
	 *           composed function
	 * @param after the function to apply after this function is applied
	 * @return a composed function that first applies this function and then
	 * applies the {@code after} function
	 * @throws NullPointerException if after is null
	 *
	 * @see #compose(Function)
	 */
	AndThen(before Function) Function
}

type FunctionFunc func(t interface{}) interface{}