From 5e7c489921f3141e62f229646d7f16c7b691be3d Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sun, 1 May 2011 00:18:55 +0200
Subject: Add 2-argument events

git-svn-id: svn://sunsvr01.isp.uni-luebeck.de/swproj13/trunk@43 72836036-5685-4462-b002-a69064685172
---
 src/jrummikub/util/Event2.java      | 23 +++++++++
 src/jrummikub/util/IEvent2.java     |  6 +++
 src/jrummikub/util/IListener2.java  |  5 ++
 test/jrummikub/util/Event2Test.java | 95 +++++++++++++++++++++++++++++++++++++
 test/jrummikub/util/EventTest.java  |  1 -
 5 files changed, 129 insertions(+), 1 deletion(-)
 create mode 100644 src/jrummikub/util/Event2.java
 create mode 100644 src/jrummikub/util/IEvent2.java
 create mode 100644 src/jrummikub/util/IListener2.java
 create mode 100644 test/jrummikub/util/Event2Test.java

diff --git a/src/jrummikub/util/Event2.java b/src/jrummikub/util/Event2.java
new file mode 100644
index 0000000..19d2d58
--- /dev/null
+++ b/src/jrummikub/util/Event2.java
@@ -0,0 +1,23 @@
+package jrummikub.util;
+
+import java.util.HashSet;
+
+public class Event2<T1, T2> implements IEvent2<T1, T2> {
+private HashSet<IListener2<T1, T2>> listeners = new HashSet<IListener2<T1, T2>>();
+  
+  @Override
+  public void add(IListener2<T1, T2> listener) {
+    listeners.add(listener);
+  }
+
+  @Override
+  public void remove(IListener2<T1, T2> listener) {
+    listeners.remove(listener);
+  }
+
+  public void fire(T1 value1, T2 value2) {
+    for (IListener2<T1, T2> listener : listeners) {
+      listener.fire(value1, value2);
+    }
+  }
+}
diff --git a/src/jrummikub/util/IEvent2.java b/src/jrummikub/util/IEvent2.java
new file mode 100644
index 0000000..f677a2d
--- /dev/null
+++ b/src/jrummikub/util/IEvent2.java
@@ -0,0 +1,6 @@
+package jrummikub.util;
+
+public interface IEvent2<T1, T2> {
+  public void add(IListener2<T1, T2> listener);
+  public void remove(IListener2<T1, T2> listener);
+}
diff --git a/src/jrummikub/util/IListener2.java b/src/jrummikub/util/IListener2.java
new file mode 100644
index 0000000..b1832c1
--- /dev/null
+++ b/src/jrummikub/util/IListener2.java
@@ -0,0 +1,5 @@
+package jrummikub.util;
+
+public interface IListener2<T1, T2> {
+  public void fire(T1 value1, T2 value2);
+}
diff --git a/test/jrummikub/util/Event2Test.java b/test/jrummikub/util/Event2Test.java
new file mode 100644
index 0000000..cbfecd5
--- /dev/null
+++ b/test/jrummikub/util/Event2Test.java
@@ -0,0 +1,95 @@
+package jrummikub.util;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class Event2Test {
+
+  int fired, fired2, fired3, fired4;
+
+  @Test
+  public void singleListener() {
+    fired = 0;
+    fired2 = 0;
+    Event2<Integer, Integer> testEvent = new Event2<Integer, Integer>();
+    testEvent.add(new IListener2<Integer, Integer>() {
+
+      @Override
+      public void fire(Integer n, Integer m) {
+        fired += n;
+        fired2 += m;
+      }
+    });
+    assertEquals(fired, 0);
+    assertEquals(fired2, 0);
+    testEvent.fire(10, 5);
+    assertEquals(fired, 10);
+    assertEquals(fired2, 5);
+    testEvent.fire(20, 45);
+    assertEquals(fired, 30);
+    assertEquals(fired2, 50);
+  }
+
+  @Test
+  public void twoListeners() {
+    fired = 0;
+    fired2 = 0;
+    fired3 = 0;
+    fired4 = 0;
+    Event2<Integer, Integer> testEvent = new Event2<Integer, Integer>();
+    testEvent.add(new IListener2<Integer, Integer>() {
+
+      @Override
+      public void fire(Integer n, Integer m) {
+        fired += n;
+        fired2 += m;
+      }
+    });
+    testEvent.add(new IListener2<Integer, Integer>() {
+
+      @Override
+      public void fire(Integer n, Integer m) {
+        fired3 -= n;
+        fired4 -= m;
+      }
+    });
+    assertEquals(fired, 0);
+    assertEquals(fired2, 0);
+    assertEquals(fired3, 0);
+    assertEquals(fired4, 0);
+    testEvent.fire(5, 10);
+    assertEquals(fired, 5);
+    assertEquals(fired2, 10);
+    assertEquals(fired3, -5);
+    assertEquals(fired4, -10);
+  }
+  
+  @Test public void removeListener() {
+    fired = 0;
+    fired2 = 0;
+    Event2<Integer, Integer> testEvent = new Event2<Integer, Integer>();
+    testEvent.add(new IListener2<Integer, Integer>() {
+
+      @Override
+      public void fire(Integer n, Integer m) {
+        fired += n;
+        fired2 += m;
+      }
+    });
+    IListener2<Integer, Integer> rem = new IListener2<Integer, Integer>() {
+      
+      @Override
+      public void fire(Integer n, Integer m) {
+        fail();
+      }
+    };
+    assertEquals(fired, 0);
+    assertEquals(fired2, 0);
+    testEvent.add(rem);
+    testEvent.remove(rem);
+    testEvent.fire(10, 20);
+    assertEquals(fired, 10);
+    assertEquals(fired2, 20);
+  }
+}
diff --git a/test/jrummikub/util/EventTest.java b/test/jrummikub/util/EventTest.java
index 0802247..0595306 100644
--- a/test/jrummikub/util/EventTest.java
+++ b/test/jrummikub/util/EventTest.java
@@ -1,6 +1,5 @@
 package jrummikub.util;
 
-import org.junit.Before;
 import org.junit.Test;
 import static org.junit.Assert.*;
 
-- 
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