/**

  * Copyright 2011 The Kuali Foundation Licensed under the

  * Educational Community License, Version 2.0 (the "License"); you may

  * not use this file except in compliance with the License. You may

  * obtain a copy of the License at

  *

  * http://www.osedu.org/licenses/ECL-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an "AS IS"

  * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express

  * or implied. See the License for the specific language governing

  * permissions and limitations under the License.

  */

 package org.kuali.student.process.poc.krms.termresolver;

 import org.apache.commons.lang.time.DateUtils;

 import org.kuali.rice.kim.api.identity.IdentityService;

 import org.kuali.rice.kim.api.identity.Person;

 import org.kuali.rice.kim.api.identity.PersonService;

 import org.kuali.rice.kim.api.identity.entity.Entity;

 import org.kuali.rice.kim.api.identity.personal.EntityBioDemographicsContract;

 import org.kuali.rice.krms.api.engine.TermResolutionException;

 import org.kuali.rice.krms.api.engine.TermResolver;

 import org.kuali.student.common.util.krms.RulesExecutionConstants;

 import java.text.ParseException;

 import java.util.Collections;

 import java.util.Date;

 import java.util.HashSet;

 import java.util.Map;

 import java.util.Set;

 /**

  * @author alubbers

  */

 public class StudentDeceasedTermResolver implements TermResolver<Boolean> {

     private IdentityService identityService;

     private final static Set<String> preRequisites;

     static {

         Set<String> temp = new HashSet<String>(2);

         temp.add(RulesExecutionConstants.STUDENT_ID_TERM_NAME);

         temp.add(RulesExecutionConstants.CURRENT_DATE_TERM_NAME);

         preRequisites = Collections.unmodifiableSet(temp);

     }

     public void setIdentityService(IdentityService identityService) {

         this.identityService = identityService;

     }

     @Override

     public Set<String> getPrerequisites() {

         return preRequisites;

     }

     @Override

     public String getOutput() {

         return RulesExecutionConstants.STUDENT_DECEASED_TERM_NAME;

     }

     @Override

     public Set<String> getParameterNames() {

         return Collections.emptySet();

     }

     @Override

     public int getCost() {

         // TODO analyze

         return 0;

     }

     @Override

     public Boolean resolve(Map<String, Object> resolvedPrereqs, Map<String, String> parameters) throws TermResolutionException {

         String studentId = (String) resolvedPrereqs.get(RulesExecutionConstants.STUDENT_ID_TERM_NAME);

         Date currentDate = (Date) resolvedPrereqs.get(RulesExecutionConstants.CURRENT_DATE_TERM_NAME);

         Entity entity = identityService.getEntity(studentId);

         Date deceasedDate = null;

         if(entity.getBioDemographics().getDeceasedDate() != null) {

             try {

                 deceasedDate = DateUtils.parseDate(entity.getBioDemographics().getDeceasedDate(), new String[]{EntityBioDemographicsContract.DECEASED_DATE_FORMAT});

             } catch (ParseException e) {

                 throw new TermResolutionException(e.getMessage(), this, parameters, e);

             }

         }

         if(deceasedDate != null) {

             return deceasedDate.before(currentDate);

         }

         return false;

     }

 }