2 * DemosceneMusic - Base.java - Copyright © 2012 David Roden
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 package net.pterodactylus.demoscenemusic.data;
20 import java.util.HashMap;
26 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
28 public class AbstractBase {
30 private final String id;
32 private final Map<String, Value<?>> attributes = new HashMap<String, Value<?>>();
34 protected AbstractBase(String id) {
42 @SuppressWarnings({ "synthetic-access", "unchecked" })
43 protected <T> Value<T> value(String name, Class<T> clazz) {
44 if (!attributes.containsKey(name)) {
45 attributes.put(name, new Value<T>());
47 return (Value<T>) attributes.get(name);
50 protected static class Value<T> {
60 public Value<T> set(T value) {
65 public boolean dirty() {
66 return (original != null) ? !original.equals(current) : current != null;
69 public Value<T> commit() {