package org.kuali.student.enrollment.class1.state.impl;
   
   import org.kuali.rice.core.api.resourceloader.GlobalResourceLoader;
   import org.kuali.student.enrollment.courseoffering.dto.ActivityOfferingInfo;
   import org.kuali.student.enrollment.courseoffering.service.CourseOfferingService;
   import org.kuali.student.r2.common.dto.ContextInfo;
   import org.kuali.student.r2.common.dto.StatusInfo;
   import org.kuali.student.r2.common.exceptions.DoesNotExistException;
   import org.kuali.student.r2.common.exceptions.InvalidParameterException;
  import org.kuali.student.r2.common.exceptions.MissingParameterException;
  import org.kuali.student.r2.common.exceptions.OperationFailedException;
  import org.kuali.student.r2.common.exceptions.PermissionDeniedException;
  import org.kuali.student.r2.common.util.constants.CourseOfferingServiceConstants;
  import org.kuali.student.r2.core.class1.state.service.StateHelper;
  
  import javax.xml.namespace.QName;
  
  /**
   * @Version 2.0
   * @Author Sri komandur@uw.edu
   */
  public class AOStateHelperImpl implements StateHelper {
      CourseOfferingService courseOfferingService;
      public AOStateHelperImpl() {
      }
  
      protected CourseOfferingService getCourseOfferingService(){
          if (courseOfferingService == null){
              courseOfferingService = (CourseOfferingService) GlobalResourceLoader.getService(new QName(CourseOfferingServiceConstants.NAMESPACE, CourseOfferingServiceConstants.SERVICE_NAME_LOCAL_PART));
          }
          return  courseOfferingService;
      }
  
      @Override
      public StatusInfo updateState(String id, String nextStateKey, ContextInfo contextInfo) {
          StatusInfo si = null;
          try {
              si = getCourseOfferingService().changeActivityOfferingState(id, nextStateKey, contextInfo);
              si.setSuccess(true);
          } catch (Exception e) {
              si.setSuccess(false);
          }
          return si;
      }
  
      @Override
      public String getStateKey(String entityId, ContextInfo context) throws InvalidParameterException, MissingParameterException, DoesNotExistException, OperationFailedException, PermissionDeniedException {
          ActivityOfferingInfo ao = getCourseOfferingService().getActivityOffering(entityId, context);
          return ao.getStateKey();
      }
  }