package org.kuali.student.lum.course.service.utils;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Stack;

 import org.kuali.student.common.dictionary.dto.FieldDefinition;

 import org.kuali.student.common.dictionary.dto.ObjectStructureDefinition;

 import org.kuali.student.common.dto.AmountInfo;

 import org.kuali.student.common.dto.TimeAmountInfo;

 import org.kuali.student.common.validation.dto.ValidationResultInfo;

 import org.kuali.student.common.validator.DefaultValidatorImpl;

 import org.kuali.student.lum.course.dto.ActivityInfo;

 /**

  * Validates Subject COde usage

  * If the Course has a subject code with usage of all, the 

  *

  */

 public class ActivityTypeValidator extends DefaultValidatorImpl {

         @Override

         public List<ValidationResultInfo> validateObject(FieldDefinition field,        Object o, ObjectStructureDefinition objStructure,

                         Stack<String> elementStack) {

                 List<ValidationResultInfo> validationResults = new ArrayList<ValidationResultInfo>();

                 if (o instanceof ActivityInfo && o != null) {

                         ActivityInfo activity = (ActivityInfo)o;

                         if (hasActivityData(activity) && !hasText(activity.getActivityType())){

                                 ValidationResultInfo vr = new ValidationResultInfo();

                                 String elementPath = getElementXpath(elementStack) + "/activityType";

                                 vr.setElement(elementPath);

                                 vr.setError("validation.required");

                                 validationResults.add(vr);

                         }                        

                 }

                 return validationResults;

         }

         protected boolean hasActivityData(ActivityInfo activity){

                 boolean hasData = false;

                 AmountInfo contactHours = activity.getContactHours();

                 if (contactHours != null){

                         hasData = hasData || hasText(contactHours.getUnitQuantity()) || hasText(contactHours.getUnitType());

                 }

                 int enrollmentEstimate = activity.getDefaultEnrollmentEstimate();

                 hasData = hasData || enrollmentEstimate >= 0;

                 TimeAmountInfo duration = activity.getDuration();

                 if (duration != null){

                         hasData = hasData || hasText(duration.getAtpDurationTypeKey());

                         hasData = hasData || (duration.getTimeQuantity() != null && duration.getTimeQuantity().intValue() >= 0);

                 }

                 return hasData;

         }

 }