+/*
+ * Sonitus - AbstractControlledComponent.java - Copyright © 2013 David Roden
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.sonitus.data;
+
+import java.util.List;
+
+import com.google.common.collect.Lists;
+
+/**
+ * Abstract {@link ControlledComponent} implementation that takes care of
+ * managing {@link MetadataListener}s.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public abstract class AbstractControlledComponent implements ControlledComponent {
+
+ /** The list of metadata listeners. */
+ private final List<MetadataListener> metadataListeners = Lists.newArrayList();
+
+ //
+ // LISTENER MANAGEMENT
+ //
+
+ @Override
+ public void addMetadataListener(MetadataListener metadataListener) {
+ metadataListeners.add(metadataListener);
+ }
+
+ @Override
+ public void removeMetadataListener(MetadataListener metadataListener) {
+ metadataListeners.remove(metadataListener);
+ }
+
+ //
+ // EVENT METHODS
+ //
+
+ /**
+ * Notifies all registered metadata listeners that the metadata has changed.
+ *
+ * @param metadata
+ * The new metadata
+ */
+ protected void fireMetadataUpdated(Metadata metadata) {
+ for (MetadataListener metadataListener : metadataListeners) {
+ metadataListener.metadataUpdated(this, metadata);
+ }
+ }
+
+}