How to fetch Old Manager Login and New Manager Login in Post Process EventHandler

 public class UserManagerEventHandler implements PostProcessHandler {

private static final Logger LOGGER = Logger.getLogger(UserManagerEventHandler.class.getName());

private static final String CLASS_NAME = UserManagerEventHandler.class.getName();

@Override

public boolean cancel(long arg0, long arg1, AbstractGenericOrchestration arg2) {

return false;

}

@Override

public void compensate(long arg0, long arg1, AbstractGenericOrchestration arg2) {

}

@Override

public BulkEventResult execute(long arg0, long arg1, BulkOrchestration arg2) {

return null;

}

/**

* @param processId    

*            OIM.ORCHEVENTS.ProcessId

* @param eventId      

*            OIM.ORCHEVENTS.ID

* @param orchestration

*            Holds useful data

*/

@Override

public EventResult execute(long processId, long eventId, Orchestration orchestration) {

String methodName = "execute";

System.out.println(CLASS_NAME + "/" + methodName + "; processId = " + processId + "; eventId = " + eventId

+ "; orchestration = " + orchestration);

LOGGER.debug(CLASS_NAME + "/" + methodName + "; processId = " + processId + "; eventId = " + eventId

+ "; orchestration = " + orchestration);

try {

// contains only the new values

HashMap<String, Serializable> newParameters = orchestration.getParameters();

// contains old and new

HashMap<String, Serializable> interParameters = orchestration.getInterEventData();

// values of user

System.out.println(String.format("Inter Parameters: %s ", interParameters));

System.out.println(String.format("New Parameters: %s ", newParameters));

User currentUserState = (User) interParameters.get("CURRENT_USER");

Long oldManagerKey = currentUserState.getAttribute("usr_manager_key") instanceof ContextAware

? (Long) ((ContextAware) currentUserState.getAttribute("usr_manager_key")).getObjectValue()

: (Long) currentUserState.getAttribute("usr_manager_key");

Long newManagerKey = getParamaterStringValue(newParameters, "usr_manager_key");

Long newMangerID = newParameters.get(AttributeName.MANAGER_KEY.getId()) instanceof ContextAware

? (Long) ((ContextAware) newParameters.get(AttributeName.MANAGER_KEY.getId())).getObjectValue()

: (Long) newParameters.get(AttributeName.MANAGER_KEY.getId());

Long oldManagerID = null;

oldManagerID = (Long) currentUserState.getAttribute(AttributeName.MANAGER_KEY.getId());

LOGGER.debug(CLASS_NAME + "newMangerID:\t" + newMangerID);

LOGGER.debug(CLASS_NAME + "newManagerKey:\t" + newManagerKey);

LOGGER.debug(CLASS_NAME + "oldManagerID" + oldManagerID);

LOGGER.debug(CLASS_NAME + "oldManagerKey" + oldManagerKey);

LOGGER.debug(CLASS_NAME + "User Login:\t" + currentUserState.getLogin());

String userLogin = currentUserState.getLogin().toUpperCase();

System.out.println("userLogin : " + userLogin);

LOGGER.debug("userLogin : " + userLogin);

String newMGRKey = String.valueOf(newManagerKey);

System.out.println("newMGRKey : " + newMGRKey);

LOGGER.debug("newMGRKey : " + newMGRKey);

String newManagerUserLogin = "";

String oldManagerUserLogin = "";

UserManager usrMgr = Platform.getService(UserManager.class);

// Check existence of manager key

if (newMGRKey != null) {

User newmanagerUser = usrMgr.getDetails(newMGRKey, new HashSet<String>(), false);

newManagerUserLogin = newmanagerUser.getLogin().toUpperCase();

LOGGER.debug("New Manager Login : " + newManagerUserLogin);

System.out.println("New Manager Login : " + newManagerUserLogin);

}

String oldMGRKey = String.valueOf(oldManagerKey);

System.out.println("oldMGRKey : " + oldMGRKey);

LOGGER.debug("oldMGRKey : " + oldMGRKey);

// Check existence of manager key

if (oldMGRKey != null) {

User oldManagerUser = usrMgr.getDetails(oldMGRKey, new HashSet<String>(), false);

oldManagerUserLogin = oldManagerUser.getLogin().toUpperCase();

LOGGER.debug("Old Manager Login : " + oldManagerUserLogin);

System.out.println("Old Manager Login : " + oldManagerUserLogin);

}

if (oldManagerID != null && newMangerID != null && newMangerID != oldManagerID) {

System.out.println("Manager update is invoking :");

LOGGER.debug("Manager update is invoking :");

String managerUpdateStatus = ManagerChange.managerChange(userLogin, oldManagerUserLogin, newManagerUserLogin);

}

}

catch (Exception ex) {

LOGGER.error(CLASS_NAME + "Error occured in Process Evenet Handler");

System.out.println(CLASS_NAME + "/" + " Exception : " + ex.getMessage());

ex.printStackTrace();

}

return new EventResult();

}

/**

* ContextAware object is obtained when the actor is a regular user. If the

* actor is an administrator, the exact value of the attribute is obtained.

* 

* @param parameters   

*            parameters from the orchestration object

* @param key  

*            name of User Attribute in OIM Profile or column in USR table

* @return value of the corresponding key in parameters

*/

private Long getParamaterStringValue(HashMap<String, Serializable> parameters, String key) {

Long value = parameters.get(key) instanceof ContextAware

? (Long) ((ContextAware) parameters.get(key)).getObjectValue() : (Long) parameters.get(key);

return value;

}

@Override

public void initialize(HashMap<String, String> arg0) {

}

}