Index: lams_common/src/java/org/lamsfoundation/lams/learningdesign/Activity.java
===================================================================
RCS file: /usr/local/cvsroot/lams_common/src/java/org/lamsfoundation/lams/learningdesign/Activity.java,v
diff -u -r1.15 -r1.16
--- lams_common/src/java/org/lamsfoundation/lams/learningdesign/Activity.java	24 Feb 2005 05:44:59 -0000	1.15
+++ lams_common/src/java/org/lamsfoundation/lams/learningdesign/Activity.java	27 Feb 2005 22:23:15 -0000	1.16
@@ -556,15 +556,23 @@
 	    return new NullGroup();
 	}
 	/**
-	 * Check up whether a is tool activity or not.
-	 * @return
+	 * Check up whether an activity is tool activity or not.
+	 * @return is this activity a tool activity?
 	 */
 	public boolean isToolActivity()
 	{
 	    return getActivityTypeId().intValue()==TOOL_ACTIVITY_TYPE;
 	}
 	
 	/**
+	 * Check up whether an activity is sequence activity or not.
+	 * @return is this activity a sequence activity?
+	 */
+	public boolean isSequenceActivity()
+	{
+	    return getActivityTypeId().intValue()==SEQUENCE_ACTIVITY_TYPE;
+	}
+	/**
 	 * Delegate to activity strategy to check up the status of all children.
 	 * @param learnerProgress the current learner progress that record the
 	 * 						  all completed activities.
Index: lams_common/src/java/org/lamsfoundation/lams/learningdesign/SequenceActivity.java
===================================================================
RCS file: /usr/local/cvsroot/lams_common/src/java/org/lamsfoundation/lams/learningdesign/SequenceActivity.java,v
diff -u -r1.8 -r1.9
--- lams_common/src/java/org/lamsfoundation/lams/learningdesign/SequenceActivity.java	24 Feb 2005 01:29:09 -0000	1.8
+++ lams_common/src/java/org/lamsfoundation/lams/learningdesign/SequenceActivity.java	27 Feb 2005 22:23:15 -0000	1.9
@@ -117,6 +117,15 @@
     	return newSequenceActivity;
     }
 
+    /**
+     * Retrieve the first activity in current sequence activity;
+     * @return the first activity;
+     */
+    public Activity getFirstActivityInSequenceActivity()
+    {
+        return this.getNextActivityByParent(new NullActivity()); 
+    }
+    
     public String toString() {
         return new ToStringBuilder(this)
             .append("activityId", getActivityId())
Index: lams_common/src/java/org/lamsfoundation/lams/lesson/SequenceActivityStrategy.java
===================================================================
RCS file: /usr/local/cvsroot/lams_common/src/java/org/lamsfoundation/lams/lesson/Attic/SequenceActivityStrategy.java,v
diff -u -r1.2 -r1.3
--- lams_common/src/java/org/lamsfoundation/lams/lesson/SequenceActivityStrategy.java	24 Feb 2005 04:11:33 -0000	1.2
+++ lams_common/src/java/org/lamsfoundation/lams/lesson/SequenceActivityStrategy.java	27 Feb 2005 22:23:15 -0000	1.3
@@ -57,6 +57,9 @@
         for(Iterator i=children.iterator();i.hasNext();)
         {
             Activity curChild = (Activity)i.next();
+            //if no current child, we should return the first one.
+            if(currentChild.isNull())
+                return curChild;
             
             if(curChild.getActivityId().longValue()==currentChild.getActivityId().longValue())
                 return (Activity)i.next();
Index: lams_common/test/java/org/lamsfoundation/lams/lesson/TestActivityStrategy.java
===================================================================
RCS file: /usr/local/cvsroot/lams_common/test/java/org/lamsfoundation/lams/lesson/Attic/TestActivityStrategy.java,v
diff -u -r1.3 -r1.4
--- lams_common/test/java/org/lamsfoundation/lams/lesson/TestActivityStrategy.java	25 Feb 2005 01:36:54 -0000	1.3
+++ lams_common/test/java/org/lamsfoundation/lams/lesson/TestActivityStrategy.java	27 Feb 2005 22:23:15 -0000	1.4
@@ -21,6 +21,7 @@
 package org.lamsfoundation.lams.lesson;
 
 import org.lamsfoundation.lams.learningdesign.Activity;
+import org.lamsfoundation.lams.learningdesign.NullActivity;
 import org.lamsfoundation.lams.lesson.dao.TestLearnerProgressDAO;
 
 
@@ -135,6 +136,17 @@
         assertEquals("it should be qna",this.testSubSeuqenceActivityQNA.getActivityId().longValue(),nextActivity.getActivityId().longValue());
     }
     
+    public void testGetFirstActivityWithinSequenceParentActivity()
+    {
+        testSubSeuquencActivitySR = activityDAO.getActivityByActivityId(TEST_SR_ACTIVITY_ID);
+
+        Activity nextActivity = this.testSequenceActivity.getNextActivityByParent(new NullActivity());
+        
+        assertNotNull("we should have a next activity",nextActivity);
+        assertEquals("it should be share resource",this.testSubSeuquencActivitySR.getActivityId().longValue(),nextActivity.getActivityId().longValue());
+    }
+    
+    
     public void testGetNextActivityByOptionsParentActivity()
     {
         testSubOptionsActivityNB = activityDAO.getActivityByActivityId(TEST_NB_ACTIVITY_ID);