| /** |
| * Performs operations upon an input object which may modify that object and/or |
| * external state (other objects). |
| * |
| * <p>All block implementations are expected to: |
| * <ul> |
| * <li>When used for aggregate operations upon many elements blocks |
| * should not assume that the {@code apply} operation will be called upon |
| * elements in any specific order.</li> |
| * </ul> |
| * |
| * @param <T> The type of input objects to {@code apply}. |
| */ |
| public interface TBlock<T> { |
| |
| /** |
| * Performs operations upon the provided object which may modify that object |
| * and/or external state. |
| * |
| * @param t an input object |
| */ |
| void apply(T t); |
| |
| /** |
| * Returns a Block which performs in sequence the {@code apply} methods of |
| * multiple Blocks. This Block's {@code apply} method is performed followed |
| * by the {@code apply} method of the specified Block operation. |
| * |
| * @param other an additional Block which will be chained after this Block |
| * @return a Block which performs in sequence the {@code apply} method of |
| * this Block and the {@code apply} method of the specified Block operation |
| */ |
| public default TBlock<T> chain(TBlock<? super T> other) { |
| return (T t) -> { apply(t); other.apply(t); }; |
| } |
| } |