Add generlized list notification.

diff --git a/src/main/java/net/pterodactylus/sone/notify/ListNotification.java b/src/main/java/net/pterodactylus/sone/notify/ListNotification.java
new file mode 100644 (file)
index 0000000..64c2ecb
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sone/notify/ListNotification.java
@@ -0,0 +1,103 @@
+/*
+ * Sone - ListNotification.java - Copyright © 2010 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.sone.notify;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import net.pterodactylus.util.notify.TemplateNotification;
+import net.pterodactylus.util.template.Template;
+
+/**
+ * Notification that maintains a list of new elements.
+ *
+ * @param <T>
+ *            The type of the items
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class ListNotification<T> extends TemplateNotification {
+
+       /** The list of new elements. */
+       private final List<T> elements = Collections.synchronizedList(new ArrayList<T>());
+
+       /**
+        * Creates a new list notification.
+        *
+        * @param id
+        *            The ID of the notification
+        * @param key
+        *            The key under which to store the elements in the template
+        * @param template
+        *            The template to render
+        */
+       public ListNotification(String id, String key, Template template) {
+               super(id, template);
+               template.set(key, elements);
+       }
+
+       //
+       // ACTIONS
+       //
+
+       /**
+        * Returns whether there are any new elements.
+        *
+        * @return {@code true} if there are no new elements, {@code false} if there
+        *         are new elements
+        */
+       public boolean isEmpty() {
+               return elements.isEmpty();
+       }
+
+       /**
+        * Adds a discovered element.
+        *
+        * @param element
+        *            The new element
+        */
+       public void add(T element) {
+               elements.add(element);
+               touch();
+       }
+
+       /**
+        * Removes the given element from the list of new elements.
+        *
+        * @param element
+        *            The element to remove
+        */
+       public void remove(T element) {
+               elements.remove(element);
+               touch();
+       }
+
+       //
+       // ABSTRACTNOTIFICATION METHODS
+       //
+
+       /**
+        * {@inheritDoc}
+        */
+       @Override
+       public void dismiss() {
+               super.dismiss();
+               elements.clear();
+       }
+
+}