/*This code was generated using the UMPLE modeling language!
 Date of generation: 2008/07/29 14:51:25*/
/*This class drives: */

package University.core;

import java.util.*;
import University.*;
import University.json.*;

public class Topic {
  //Class datatypes

  //Class association variables
  private List<PrerequisiteReason> prerequisiteReasons;

  private List<MutualExclusionReason> mutualExclusionReasons;

  //Registry of our system.
  UniversityRegistry registry = UniversityRegistry.getInstance();

  //Constructor
  public Topic() {
    prerequisiteReasons = new ArrayList<PrerequisiteReason>();
    registry.add(prerequisiteReasons);

    mutualExclusionReasons = new ArrayList<MutualExclusionReason>();
    registry.add(mutualExclusionReasons);

  }

  public List<PrerequisiteReason> getPrerequisiteReasons() {
    return prerequisiteReasons;
  }

  public List<MutualExclusionReason> getMutualExclusionReasons() {
    return mutualExclusionReasons;
  }

  public PrerequisiteReason addPrerequisiteReason(Course aSuccessor,
    Course aPrerequisite) {
    PrerequisiteReason newPrerequisiteReason;
    newPrerequisiteReason = new PrerequisiteReason(aSuccessor, aPrerequisite);
    if (!prerequisiteReasons.contains(newPrerequisiteReason)) {
      registry.add(newPrerequisiteReason);
      prerequisiteReasons.add(newPrerequisiteReason);
    }
    return newPrerequisiteReason;
  }

  public PrerequisiteReason addPrerequisiteReason(
    PrerequisiteReason aPrerequisiteReason) {
    if (!prerequisiteReasons.contains(aPrerequisiteReason))
      prerequisiteReasons.add(aPrerequisiteReason);
    return aPrerequisiteReason;
  }

  public MutualExclusionReason addMutualExclusionReason(Course aCourse,
    Course aIsMutualyExclusiveWith) {
    MutualExclusionReason newMutualExclusionReason;
    newMutualExclusionReason =
      new MutualExclusionReason(aCourse, aIsMutualyExclusiveWith);
    if (!mutualExclusionReasons.contains(newMutualExclusionReason)) {
      registry.add(newMutualExclusionReason);
      mutualExclusionReasons.add(newMutualExclusionReason);
    }
    return newMutualExclusionReason;
  }

  public MutualExclusionReason addMutualExclusionReason(
    MutualExclusionReason aMutualExclusionReason) {
    if (!mutualExclusionReasons.contains(aMutualExclusionReason))
      mutualExclusionReasons.add(aMutualExclusionReason);
    return aMutualExclusionReason;
  }

  public void delete() {
  }

  public void deletePrerequisiteReason(PrerequisiteReason aPrerequisiteReason) {

    if (prerequisiteReasons.contains(aPrerequisiteReason)) {
      prerequisiteReasons.remove(aPrerequisiteReason);

      //registry.removeObj(registry.getKey(aPrerequisiteReason));
    } else
    //Throw an UmpleException .. to be implemented.
    {
    }
  }

  public void deleteMutualExclusionReason(
    MutualExclusionReason aMutualExclusionReason) {

    if (mutualExclusionReasons.contains(aMutualExclusionReason)) {
      mutualExclusionReasons.remove(aMutualExclusionReason);

      //registry.removeObj(registry.getKey(aMutualExclusionReason));
    } else
    //Throw an UmpleException .. to be implemented.
    {
    }
  }

  public boolean areManyEndsNull() {
    return true;
  }

  /***********************************
   * Returns the attribute list along with the  
   * class ID in JSON format.
   ***********************************/
  public JSONObject getAttributes() throws JSONException {
    JSONObject obj = new JSONObject();
    obj.put("CLASS_ID", registry.getKey(this));
    return obj;
  }

}