diff -ruN -x target -x bin legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentHostingService.java ../sakai-src_2-1-2/legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentHostingService.java
--- legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentHostingService.java	2006-04-07 19:22:19.000000000 +0100
+++ ../sakai-src_2-1-2/legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentHostingService.java	2006-04-27 17:09:59.000000000 +0100
@@ -1188,4 +1188,10 @@
 	 * @return The default dropbox collection display name for the site.
 	 */
 	public String getDropboxDisplayName(String siteId);
+	
+	// Xuan Added Method
+	// Registers a ContentHandler in this content service
+	public void registerContentHandler(ContentResourceHandler ch);
+	public ContentResourceEdit newContentResource(String id, ResourceContentHandler rch);
+	// End. Xuan added
 }
diff -ruN -x target -x bin legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentResourceEdit.java ../sakai-src_2-1-2/legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentResourceEdit.java
--- legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentResourceEdit.java	2006-04-07 19:22:19.000000000 +0100
+++ ../sakai-src_2-1-2/legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentResourceEdit.java	2006-04-27 17:10:49.000000000 +0100
@@ -55,6 +55,10 @@
 	* @param content An array containing the bytes of the resource's content.
 	*/
 	public void setContent(byte[] content);
+	
+	// Xuan added method
+	public void setContentHandler(ResourceContentHandler handler);
+	// End Xuan Added
 
 }	// ContentResourceEdit
 
diff -ruN -x target -x bin legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentResourceHandler.java ../sakai-src_2-1-2/legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentResourceHandler.java
--- legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentResourceHandler.java	1970-01-01 01:00:00.000000000 +0100
+++ ../sakai-src_2-1-2/legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ContentResourceHandler.java	2006-04-28 15:05:47.000000000 +0100
@@ -0,0 +1,61 @@
+package org.sakaiproject.service.legacy.content;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.sakaiproject.service.legacy.entity.Entity;
+
+
+
+public interface ContentResourceHandler {
+	
+	public static final String CONTENT_REFERENCE_ROOT = Entity.SEPARATOR + "content";
+	public static final String IMS_CP_MIMETYPE = "ims/cp";
+
+	public static final String IMS_CP_FLAG = ".ims";
+
+	public static final String IMS_CP_DEFAULTMANIFEST = "/imsmanifest.xml";
+
+	/*
+	 * Handles the resource returned by basic ContenHostingService, if resource is NOT null. Otherwise 
+	 * processes the id and returns appropriate resource for this ContentResourceHandler.
+	 * @param id
+	 * @param resource The default resource returned by ContentHostingService for id, may be
+	 * NULL
+	 * @return The resource corresponding for id or NULL when resource doesn't exit or isn't
+	 * supported by this Handler
+	 * */
+	public ContentResource verifyContent(String id, ContentResource resource);
+	
+	/*
+	 * Before verify the ContentResource, the HttpServletRequest and HttpServletResponse for this
+	 * resource can be processed here. For instance, the parameters encoded in the request URL.
+	 * @param request The HttpServletRequest for this request
+	 * @param response The HttpServletResponse for this request
+	 */
+//	public void checkRequest( HttpServletRequest request);
+	
+	/*
+	 * Init method for this ContentResourceHandler. Generally, the handler registers itself with the
+	 * ContentHostingService.
+	 */
+	public void init();
+	
+	/*
+	 * destroy method for this ContentResourceHanlder.
+	 * The typical work is deregister itself from the ContentHostingService's content hanlder
+	 * list
+	 */
+	public void destroy();
+	
+	/*
+	 * Getter method for the ContentHostingService
+	 */
+	public ContentHostingService getService();
+	
+	/*
+	 * Setter method for the ContentHostingService. The handler holds a reference to 
+	 * the ContentHostingService in Sakai
+	 */
+	public void setService(ContentHostingService service);
+}
diff -ruN -x target -x bin legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ResourceContentHandler.java ../sakai-src_2-1-2/legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ResourceContentHandler.java
--- legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ResourceContentHandler.java	1970-01-01 01:00:00.000000000 +0100
+++ ../sakai-src_2-1-2/legacy-service/service/src/java/org/sakaiproject/service/legacy/content/ResourceContentHandler.java	2006-04-27 17:12:42.000000000 +0100
@@ -0,0 +1,10 @@
+package org.sakaiproject.service.legacy.content;
+
+import java.io.InputStream;
+
+public interface ResourceContentHandler {
+
+	public byte[] getResourceBody();
+
+	public InputStream streamResourceBody();
+}