/**

  * 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.kuali.rice.krms.api.engine.TermResolutionException;

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

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

 import org.kuali.student.r2.common.dto.ContextInfo;

 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.core.population.service.PopulationService;

 import java.util.Collections;

 import java.util.HashSet;

 import java.util.Map;

 import java.util.Set;

 /**

  * This class resolves the term of determining if the student is only registered in the summer term

  *

  * @author alubbers

  */

 public class SummerOnlyStudentTermResolver implements TermResolver<Boolean> {

     private PopulationService populationService;

     private final static Set<String> prerequisites = new HashSet<String>(2);

     private final String summerPopulationKey;

     static {

         prerequisites.add(RulesExecutionConstants.STUDENT_ID_TERM_NAME);

         prerequisites.add(RulesExecutionConstants.CONTEXT_INFO_TERM_NAME);

     }

     public SummerOnlyStudentTermResolver(String summerPopulationKey) {

         this.summerPopulationKey = summerPopulationKey;

     }

     public void setPopulationService(PopulationService populationService) {

         this.populationService = populationService;

     }

     @Override

     public Set<String> getPrerequisites() {

         return prerequisites;

     }

     @Override

     public String getOutput() {

         return RulesExecutionConstants.SUMMER_ONLY_STUDENT_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 {

         Boolean result = false;

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

         ContextInfo context = (ContextInfo) resolvedPrereqs.get(RulesExecutionConstants.CONTEXT_INFO_TERM_NAME);

         try {

             result = populationService.isMember(studentId, summerPopulationKey, context);

         } catch (DoesNotExistException e) {

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

         } catch (InvalidParameterException e) {

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

         } catch (MissingParameterException e) {

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

         } catch (OperationFailedException e) {

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

         } catch (PermissionDeniedException e) {

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

         }

         return result;

     }

 }