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.util.MessageUtils;

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

 import org.kuali.student.core.atp.dto.AtpInfo;

 import org.kuali.student.core.atp.service.AtpService;

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

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

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

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

 public class ActiveDatesValidator extends DefaultValidatorImpl {

         private AtpService atpService;

         @Override

         public List<ValidationResultInfo> validateObject(Object data,

                         ObjectStructureDefinition objStructure) {

                 // Custom validators are required to only override the other

                 // validateObject method

                 return null;

         }

         @Override

         public List<ValidationResultInfo> validateObject(FieldDefinition field,

                         Object o, ObjectStructureDefinition objStructure,

                         Stack<String> elementStack) {

                 //Get ATPs and compare dates.  If the end is <= the start, throw a validation error.

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

                 if (o instanceof CourseInfo) {

                         CourseInfo course = (CourseInfo) o;

                         if (course.getEndTerm() != null && course.getStartTerm() != null) {

                                 try {

                                         AtpInfo startAtp = atpService.getAtp(course.getStartTerm());

                                         AtpInfo endAtp = atpService.getAtp(course.getEndTerm());

                                         if (startAtp.getStartDate()

                                                         .compareTo(endAtp.getStartDate()) > 0) {

                                                 ValidationResultInfo vr = new ValidationResultInfo();

                                                 vr.setElement(field.getName());

                                                 vr.setError("validation.endDateAfterStartDate");

                                                 results.add(vr);

                                         }

                                 } catch (Exception e) {

                                         throw new RuntimeException("Error validating.", e);

                                 }

                         }

                 }

                 return results;

         }

         public void setAtpService(AtpService atpService) {

                 this.atpService = atpService;

         }

 }