/**
    * 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;
      }
  }