1 files changed, 54 insertions, 0 deletions
diff --git a/src/com/isode/stroke/signals/Signal.java b/src/com/isode/stroke/signals/Signal.java
new file mode 100644
index 0000000..cfa8665
--- /dev/null
+++ b/src/com/isode/stroke/signals/Signal.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2010, Isode Limited, London, England.
+ * All rights reserved.
+ */
+package com.isode.stroke.signals;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * An approximation of the boost::signals system, although a little more warty.
+ */
+public class Signal {
+
+    private final Map<SignalConnection, Slot> binds_ = Collections.synchronizedMap(new HashMap<SignalConnection, Slot>());
+
+    public SignalConnection connect(Slot bind) {
+        final SignalConnection connection = new SignalConnection();
+        binds_.put(connection, bind);
+        connection.onDestroyed.connectWithoutReturn(new Slot() {
+
+            public void call() {
+                binds_.remove(connection);
+            }
+        });
+        return connection;
+    }
+
+    public SignalConnection connect(final Signal target) {
+        return connect(new Slot() {
+            public void call() {
+                target.emit();
+            }
+        });
+    }
+
+    void connectWithoutReturn(Slot bind) {
+        binds_.put(null, bind);
+    }
+
+    public void emit() {
+        ArrayList<Slot> binds = new ArrayList<Slot>();
+        binds.addAll(binds_.values());
+        for (Slot bind : binds) {
+            bind.call();
+        }
+    }
+
+    public void disconnectAll() {
+        binds_.clear();
+    }
+}