diff -r 000000000000 -r 77b6002451c4 samples/codeinjection/src/org/apidesign/codeinjection/CountDownImplV2.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/samples/codeinjection/src/org/apidesign/codeinjection/CountDownImplV2.java	Sat Jan 10 21:29:22 2009 +0100
@@ -0,0 +1,44 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+package org.apidesign.codeinjection;
+
+import java.util.Iterator;
+import java.util.ServiceLoader;
+import org.apidesign.codeinjection.spi.CountDownExtender;
+
+/** Second version to {@link CountDownImplV1} - imagine someone wants to
+ * reimplement {@link #down()} method to decrement by two not just by one.
+ * You do not like that idea at all, but you do not want to prevent such
+ * behaviour. You just do not want to maintain such bloody code. What can
+ * you do? You need to allow <b>code injection</b> via the
+ * {@link CountDownExtender} class!
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+final class CountDownImplV2 extends CountDown {
+    private int cnt;
+
+    CountDownImplV2(int initial) {
+        this.cnt = initial;
+    }
+
+// BEGIN: codeinjection.v2
+    public void down() {
+        Iterator<CountDownExtender> it = ServiceLoader.load(CountDownExtender.class).iterator();
+        if (it.hasNext()) {
+            // injected behaviour
+            cnt = it.next().decrement(cnt);
+        } else {
+            // common behaviour of 1.0 version
+            cnt--;
+        }
+    }
+
+    public boolean isDown() {
+        return cnt <= 0;
+    }
+// END: codeinjection.v2
+}