1 files changed, 17 insertions, 0 deletions
diff --git a/same/src/main/java/com/orbekk/same/Variable.java b/same/src/main/java/com/orbekk/same/Variable.java
new file mode 100644
index 0000000..63f8063
--- /dev/null
+++ b/same/src/main/java/com/orbekk/same/Variable.java
@@ -0,0 +1,17 @@
+package com.orbekk.same;
+
+public interface Variable<T> {
+    public interface OnChangeListener<T> {
+        /**
+         * A notification that 'variable' has been changed.
+         * 
+         * The user must run variable.update() to get the updated value.
+         */
+        void valueChanged(Variable<T> variable);
+    }
+    
+    T get();
+    void set(T value);
+    void update();
+    void setOnChangeListener(OnChangeListener<T> listener);
+}