From 64a31c6a33854ff4d2a5f3844cfaed39cba78ee2 Mon Sep 17 00:00:00 2001
From: Gurmeen Bindra <gurmeen.bindra@isode.com>
Date: Mon, 16 Apr 2012 15:52:39 +0100
Subject: Add Signal and Slot classes with 3 parameters

MUC Admin requires Signals and Slots with 3 parameters so this patch adds
Signal/Slot classes which cater to 3 parameter values

Test-information:

tested with Work In Progress MUC Admin code

diff --git a/src/com/isode/stroke/signals/Signal3.java b/src/com/isode/stroke/signals/Signal3.java
new file mode 100644
index 0000000..b9151dc
--- /dev/null
+++ b/src/com/isode/stroke/signals/Signal3.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2012, 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.List;
+import java.util.Map;
+
+/**
+ * An approximation of the boost::signals system with 3 parameters
+ * @param <T1> Type 1
+ * @param <T2> Type 2
+ * @param <T3> Type 3
+ */
+public class Signal3<T1, T2, T3> {
+    private final Map<SignalConnection, Slot3<T1, T2,T3> > binds_ = Collections.synchronizedMap(
+            new HashMap<SignalConnection, Slot3<T1, T2,T3> >());
+
+    /**
+     * Add a slot which will be notified
+     * @param bind slot, not null
+     * @return signal connection
+     */
+    public SignalConnection connect(Slot3<T1, T2,T3> bind) {
+        final SignalConnection connection = new SignalConnection();
+        binds_.put(connection, bind);
+        connection.onDestroyed.connect(new Slot() {
+            public void call() {
+                binds_.remove(connection);
+            }
+        });
+        return connection;
+    }
+
+    /**
+     * Notify all slots(listeners)
+     * @param p1 parameter value 1
+     * @param p2 parameter value 2
+     * @param p3 parameter value 3
+     */
+    public void emit(T1 p1, T2 p2,T3 p3) {
+        List<Slot3<T1,T2, T3>> binds = new ArrayList<Slot3<T1, T2, T3>>();
+        binds.addAll(binds_.values());
+        for (Slot3<T1, T2, T3> bind : binds) {
+            bind.call(p1, p2, p3);
+        }
+    }
+
+    /**
+     * Remove all slots(listeners) 
+     */
+    public void disconnectAll() {
+        binds_.clear();
+    }
+}
diff --git a/src/com/isode/stroke/signals/Slot3.java b/src/com/isode/stroke/signals/Slot3.java
new file mode 100644
index 0000000..ee5ccbc
--- /dev/null
+++ b/src/com/isode/stroke/signals/Slot3.java
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2012, Isode Limited, London, England.
+ * All rights reserved.
+ */
+
+package com.isode.stroke.signals;
+
+/**
+ * Bind class for connecting to a signal with 3 parameters.
+ * @param <T1> Type 1
+ * @param <T2> Type 2
+ * @param <T3> Type 3
+ */
+public interface Slot3<T1, T2,T3> {
+    /**
+     * This method will be called on notification from a signal
+     * @param p1 parameter value 1
+     * @param p2 parameter value 2
+     * @param p3 parameter value 3
+     */
+    void call(T1 p1, T2 p2,T3 p3);
+}
-- 
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