Restoring Usage Event until proper patch is prepared

git-svn-id: http://scm.dspace.org/svn/repo/dspace/trunk@6131 9c30dcfa-912a-0410-8fc2-9e0234be79fd

dspace-api/src/main/java/org/dspace/usage/UsageEvent.java

@@ -0,0 +1,157 @@
+/**
+ * The contents of this file are subject to the license and copyright
+ * detailed in the LICENSE and NOTICE files at the root of the source
+ * tree and available online at
+ *
+ * http://www.dspace.org/license/
+ */
+package org.dspace.usage;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.dspace.content.DSpaceObject;
+import org.dspace.core.Constants;
+import org.dspace.core.Context;
+import org.dspace.services.model.Event;
+
+/**
+ * 
+ * @author Mark Diggory (mdiggory at atmire.com)
+ *
+ */
+public class UsageEvent extends Event {
+	
+	public static enum Action {
+		VIEW ("view"),
+		CREATE ("create"),
+		UPDATE ("update"),
+		DELETE ("delete"),
+		ADD ("add"),
+		REMOVE ("remove"),
+		BROWSE ("browse"),
+		SEARCH ("search"),
+		LOGIN ("login"),
+		SUBSCRIBE ("subscribe"),
+		UNSUBSCRIBE ("unsubscribe"),
+		WITHDRAW ("withdraw"),
+		REINSTATE ("reinstate"); 
+		
+		private final String text;
+	    
+	    Action(String text) {
+	        this.text = text;
+	    }
+	    String text()   { return text; }
+	}
+	
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
+	private transient HttpServletRequest request;
+	
+	private transient Context context;
+	
+	private transient DSpaceObject object;
+
+	private Action action;
+			
+	private static String checkParams(Action action, HttpServletRequest request, Context context, DSpaceObject object)
+	{
+		if(action == null)
+        {
+            throw new IllegalStateException("action cannot be null");
+        }
+			
+		if(request == null)
+        {
+            throw new IllegalStateException("request cannot be null");
+        }
+		
+
+		if(context == null)
+        {
+            throw new IllegalStateException("context cannot be null");
+        }
+		
+		if(object == null)
+        {
+            throw new IllegalStateException("object cannot be null");
+        }
+		
+		try
+		{
+			String objText = Constants.typeText[object.getType()].toLowerCase();
+			return  objText + ":" + action.text();
+		}catch(Exception e)
+		{
+			
+		}
+		return "";
+		
+	}
+	
+	public UsageEvent(Action action, HttpServletRequest request, Context context, DSpaceObject object)
+	{
+		
+		super(checkParams(action, request, context, object));
+		
+		this.action = action;
+	
+		this.setResourceReference(object != null ? Constants.typeText[object.getType()].toLowerCase() + ":" + object.getID() : null);
+		
+		switch(action)
+		{
+			case CREATE:
+			case UPDATE:
+			case DELETE:
+			case WITHDRAW:
+			case REINSTATE:	
+			case ADD:
+			case REMOVE:
+				this.setModify(true);
+				break;
+			default : 
+				this.setModify(false);
+		}
+		
+		if(context != null && context.getCurrentUser() != null)
+		{
+			this.setUserId(
+					String.valueOf(context.getCurrentUser().getID()));
+		}
+		this.request = request;
+		this.context = context;
+		this.object = object;
+	}
+
+	public HttpServletRequest getRequest() {
+		return request;
+	}
+
+	public void setRequest(HttpServletRequest request) {
+		this.request = request;
+	}
+
+	public Context getContext() {
+		return context;
+	}
+
+	public void setContext(Context context) {
+		this.context = context;
+	}
+
+	public DSpaceObject getObject() {
+		return object;
+	}
+
+	public void setObject(DSpaceObject object) {
+		this.object = object;
+	}
+
+	public Action getAction() {
+		return this.action;
+	}
+	
+}