Add controller interface.

diff --git a/src/main/java/net/pterodactylus/sonitus/data/Controller.java b/src/main/java/net/pterodactylus/sonitus/data/Controller.java
new file mode 100644 (file)
index 0000000..01e157a
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sonitus/data/Controller.java
@@ -0,0 +1,64 @@
+/*
+ * Sonitus - Controller.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;
+
+/**
+ * A single controllable element.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public interface Controller {
+
+       /**
+        * Returns the minimum value of this controller.
+        *
+        * @return The minimum value of this controller
+        */
+       int minimum();
+
+       /**
+        * Returns the maximum value of this controller.
+        *
+        * @return The maximum value of this controller
+        */
+       int maximum();
+
+       /**
+        * Returns whether this control has a “center” position.
+        *
+        * @return {@code true} if this controller has a “center” position, {@code
+        *         false} otherwise
+        */
+       boolean centered();
+
+       /**
+        * Returns the current value of this controller.
+        *
+        * @return The current value of this controller
+        */
+       int value();
+
+       /**
+        * Sets the current value of this controller.
+        *
+        * @param value
+        *              The current value of this controller
+        */
+       void value(int value);
+
+}