/**

  * 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.common.util.krms.proposition;

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

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

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

 import java.util.Collection;

 import java.util.Collections;

 /**

  * Proposition that checks for current enrollment in a set of courses

  *

  * @author alubbers

  */

 public class CourseSetEnrollmentProposition extends CourseEnrollmentProposition {

     private String courseSetId;

     private Collection<String> courseIds;

     public CourseSetEnrollmentProposition(String courseSetId, Integer minToEnroll) {

         super(minToEnroll);

         this.courseSetId = courseSetId;

     }

     public CourseSetEnrollmentProposition(String courseSetId) {

         super();

         this.courseSetId = courseSetId;

     }

     @Override

     protected Collection<String> getRequiredCourseIds(ExecutionEnvironment environment) {

         if(courseIds == null) {

             Term term = new Term(RulesExecutionConstants.COURSE_SET_TERM_NAME, Collections.singletonMap(RulesExecutionConstants.COURSE_SET_ID_TERM_PROPERTY, courseSetId));

             courseIds = environment.resolveTerm(term, this);

         }

         return courseIds;

     }

 }