this time, I added the unit test... :)
diff --git a/src/test/java/org/apache/ode/jacob/soup/Jackson/JacksonSoupTest.java b/src/test/java/org/apache/ode/jacob/soup/Jackson/JacksonSoupTest.java
new file mode 100644
index 0000000..38a342c
--- /dev/null
+++ b/src/test/java/org/apache/ode/jacob/soup/Jackson/JacksonSoupTest.java
@@ -0,0 +1,121 @@
+/*

+ * Licensed to the Apache Software Foundation (ASF) under one

+ * or more contributor license agreements.  See the NOTICE file

+ * distributed with this work for additional information

+ * regarding copyright ownership.  The ASF licenses this file

+ * to you under the Apache License, Version 2.0 (the

+ * "License"); you may not use this file except in compliance

+ * with the License.  You may obtain a copy of the License at

+ *

+ *    http://www.apache.org/licenses/LICENSE-2.0

+ *

+ * Unless required by applicable law or agreed to in writing,

+ * software distributed under the License is distributed on an

+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

+ * KIND, either express or implied.  See the License for the

+ * specific language governing permissions and limitations

+ * under the License.

+ */

+package org.apache.ode.jacob.soup.Jackson;

+

+import java.util.ArrayList;

+import java.util.List;

+

+import org.apache.ode.jacob.examples.helloworld.HelloWorld;

+import org.apache.ode.jacob.soup.jackson.JacksonExecutionQueueImpl;

+import org.apache.ode.jacob.soup.jackson.JacobModule;

+import org.apache.ode.jacob.vpu.JacobVPU;

+import org.junit.Assert;

+import org.junit.Before;

+import org.junit.Test;

+

+import com.fasterxml.jackson.databind.ObjectMapper;

+import com.fasterxml.jackson.databind.SerializationFeature;

+

+/**

+ * Simple testcase to verify the jackson based serialization/

+ * deserialization code.

+ * 

+ * @author Tammo van Lessen

+ *

+ */

+public class JacksonSoupTest {

+    

+    private ObjectMapper mapper;

+    private JacksonExecutionQueueImpl queue;

+    private List<String> fixtures = new ArrayList<String>();

+    

+    @Before

+    public void setUp() {

+        mapper = new ObjectMapper();

+        mapper.registerModule(new JacobModule());

+        mapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);

+        

+        queue = new JacksonExecutionQueueImpl();

+        

+        fixtures.add("{\"objIdCounter\":2,\"currentCycle\":1,\"continuations\":[{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess\",\"@id\":1,\"_in\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":1}},\"method\":\"run\",\"args\":[]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess\",\"@id\":1,\"in\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":2},\"out\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":1}},\"method\":\"run\",\"args\":[]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$StringEmitterProcess\",\"@id\":1,\"str\":\"Hello\",\"to\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":2}},\"method\":\"run\",\"args\":[]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$StringEmitterProcess\",\"@id\":1,\"str\":\"World\",\"to\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":2}},\"method\":\"run\",\"args\":[]}],\"channels\":[{\"@id\":1,\"type\":\"org.apache.ode.jacob.Val\",\"id\":1,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":false,\"objFrames\":[],\"msgFrames\":[],\"description\":\"simpleHelloWorld-out\"},{\"@id\":2,\"type\":\"org.apache.ode.jacob.Val\",\"id\":2,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":false,\"objFrames\":[],\"msgFrames\":[],\"description\":\"simpleHelloWorld-x\"}],\"global\":null}");

+        fixtures.add("{\"objIdCounter\":2,\"currentCycle\":2,\"continuations\":[{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess\",\"@id\":1,\"in\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":2},\"out\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":1}},\"method\":\"run\",\"args\":[]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$StringEmitterProcess\",\"@id\":1,\"str\":\"Hello\",\"to\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":2}},\"method\":\"run\",\"args\":[]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$StringEmitterProcess\",\"@id\":1,\"str\":\"World\",\"to\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":2}},\"method\":\"run\",\"args\":[]}],\"channels\":[{\"@id\":1,\"type\":\"org.apache.ode.jacob.Val\",\"id\":1,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":true,\"objFrames\":[{\"@id\":2,\"commGroupFrame\":{\"@id\":3,\"replicated\":true,\"commFrames\":[2]},\"channelFrame\":1,\"_continuation\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessReceiveProcess\",\"@id\":4,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessVal\"}}}],\"msgFrames\":[],\"description\":\"simpleHelloWorld-out\"},{\"@id\":5,\"type\":\"org.apache.ode.jacob.Val\",\"id\":2,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":false,\"objFrames\":[],\"msgFrames\":[],\"description\":\"simpleHelloWorld-x\"}],\"global\":null}");

+        fixtures.add("{\"objIdCounter\":2,\"currentCycle\":3,\"continuations\":[{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$StringEmitterProcess\",\"@id\":1,\"str\":\"Hello\",\"to\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":2}},\"method\":\"run\",\"args\":[]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$StringEmitterProcess\",\"@id\":1,\"str\":\"World\",\"to\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":2}},\"method\":\"run\",\"args\":[]}],\"channels\":[{\"@id\":1,\"type\":\"org.apache.ode.jacob.Val\",\"id\":1,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":true,\"objFrames\":[{\"@id\":2,\"commGroupFrame\":{\"@id\":3,\"replicated\":true,\"commFrames\":[2]},\"channelFrame\":1,\"_continuation\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessReceiveProcess\",\"@id\":4,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessVal\"}}}],\"msgFrames\":[],\"description\":\"simpleHelloWorld-out\"},{\"@id\":5,\"type\":\"org.apache.ode.jacob.Val\",\"id\":2,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":true,\"objFrames\":[{\"@id\":6,\"commGroupFrame\":{\"@id\":7,\"replicated\":true,\"commFrames\":[6]},\"channelFrame\":5,\"_continuation\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessReceiveProcess\",\"@id\":8,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessVal\",\"@id\":9,\"out\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":1}}}}],\"msgFrames\":[],\"description\":\"simpleHelloWorld-x\"}],\"global\":null}");

+        fixtures.add("{\"objIdCounter\":2,\"currentCycle\":4,\"continuations\":[{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$StringEmitterProcess\",\"@id\":1,\"str\":\"World\",\"to\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":2}},\"method\":\"run\",\"args\":[]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessReceiveProcess\",\"@id\":1,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessVal\",\"@id\":2,\"out\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":1}}},\"method\":\"val\",\"args\":[\"Hello\"]}],\"channels\":[{\"@id\":1,\"type\":\"org.apache.ode.jacob.Val\",\"id\":1,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":true,\"objFrames\":[{\"@id\":2,\"commGroupFrame\":{\"@id\":3,\"replicated\":true,\"commFrames\":[2]},\"channelFrame\":1,\"_continuation\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessReceiveProcess\",\"@id\":4,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessVal\"}}}],\"msgFrames\":[],\"description\":\"simpleHelloWorld-out\"},{\"@id\":5,\"type\":\"org.apache.ode.jacob.Val\",\"id\":2,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":true,\"objFrames\":[{\"@id\":6,\"commGroupFrame\":{\"@id\":7,\"replicated\":true,\"commFrames\":[6]},\"channelFrame\":5,\"_continuation\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessReceiveProcess\",\"@id\":8,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessVal\",\"@id\":9,\"out\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":1}}}}],\"msgFrames\":[],\"description\":\"simpleHelloWorld-x\"}],\"global\":null}");

+        fixtures.add("{\"objIdCounter\":2,\"currentCycle\":5,\"continuations\":[{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessReceiveProcess\",\"@id\":1,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessVal\",\"@id\":2,\"out\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":1}}},\"method\":\"val\",\"args\":[\"Hello\"]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessReceiveProcess\",\"@id\":1,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessVal\",\"@id\":2,\"out\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":1}}},\"method\":\"val\",\"args\":[\"World\"]}],\"channels\":[{\"@id\":1,\"type\":\"org.apache.ode.jacob.Val\",\"id\":1,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":true,\"objFrames\":[{\"@id\":2,\"commGroupFrame\":{\"@id\":3,\"replicated\":true,\"commFrames\":[2]},\"channelFrame\":1,\"_continuation\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessReceiveProcess\",\"@id\":4,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessVal\"}}}],\"msgFrames\":[],\"description\":\"simpleHelloWorld-out\"}],\"global\":null}");

+        fixtures.add("{\"objIdCounter\":2,\"currentCycle\":6,\"continuations\":[{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessReceiveProcess\",\"@id\":1,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$ForwarderProcess$ForwarderProcessVal\",\"@id\":2,\"out\":{\"@class\":\"org.apache.ode.jacob.Val\",\"channelType\":\"org.apache.ode.jacob.Val\",\"channelId\":1}}},\"method\":\"val\",\"args\":[\"World\"]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessReceiveProcess\",\"@id\":1,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessVal\"}},\"method\":\"val\",\"args\":[\"Hello\"]}],\"channels\":[{\"@id\":1,\"type\":\"org.apache.ode.jacob.Val\",\"id\":1,\"refCount\":0,\"replicatedSend\":false,\"replicatedRecv\":true,\"objFrames\":[{\"@id\":2,\"commGroupFrame\":{\"@id\":3,\"replicated\":true,\"commFrames\":[2]},\"channelFrame\":1,\"_continuation\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessReceiveProcess\",\"@id\":4,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessVal\"}}}],\"msgFrames\":[],\"description\":\"simpleHelloWorld-out\"}],\"global\":null}");

+        fixtures.add("{\"objIdCounter\":2,\"currentCycle\":7,\"continuations\":[{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessReceiveProcess\",\"@id\":1,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessVal\"}},\"method\":\"val\",\"args\":[\"Hello\"]},{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessReceiveProcess\",\"@id\":1,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessVal\"}},\"method\":\"val\",\"args\":[\"World\"]}],\"channels\":[],\"global\":null}");

+        fixtures.add("{\"objIdCounter\":2,\"currentCycle\":8,\"continuations\":[{\"target\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessReceiveProcess\",\"@id\":1,\"receiver\":{\"@class\":\"org.apache.ode.jacob.examples.helloworld.HelloWorld$PrinterProcess$PrinterProcessVal\"}},\"method\":\"val\",\"args\":[\"World\"]}],\"channels\":[],\"global\":null}");

+        fixtures.add("{\"objIdCounter\":2,\"currentCycle\":9,\"continuations\":[],\"channels\":[],\"global\":null}");

+    }

+    

+    @Test

+    public void testEmptySerialization() throws Exception {

+        Assert.assertEquals("{\"objIdCounter\":0,\"currentCycle\":0,\"continuations\":[],\"channels\":[],\"global\":null}", mapper.writeValueAsString(queue));

+    }

+

+    

+    /**

+     * Serializes every execution step and compares it with our fixtures.

+     * 

+     * @throws Exception

+     */

+    @Test

+    public void testSimpleHelloWorldSerialize() throws Exception {

+        JacobVPU vpu = new JacobVPU();

+        vpu.setContext(queue);

+        vpu.inject(new HelloWorld() {

+            @Override

+            public void run() {

+                simpleHelloWorld();

+            }

+        });

+        

+        int i = 0;

+        while (vpu.execute()) {

+            String ser = mapper.writeValueAsString(queue);

+            Assert.assertEquals(fixtures.get(i), ser);

+            i++;

+        }

+

+        Assert.assertEquals(9, i);

+    }

+    

+    /**

+     * Deserializes each execution step from fixtures and resumes the execution from

+     * each point.

+     * 

+     * @throws Exception

+     */

+    @Test

+    public void testSimpleHelloWorldDeserialize() throws Exception {

+        JacobVPU vpu = new JacobVPU();

+        

+        for (String state : fixtures) {

+            vpu.setContext(mapper.readValue(state, JacksonExecutionQueueImpl.class));

+            int i = 0;

+            while (vpu.execute()) {

+                i++;

+            }

+            

+            // sum of pre-loaded & then-completed steps is always 8.

+            Assert.assertEquals(8, i + fixtures.indexOf(state));

+        }

+        

+    }

+}