code: /*
   * PDDLSingleGoal.java
   *
   * Copyright (C) 2020 Vladislav Nikolov Vasilev
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program.  If not, see https://www.gnu.org/licenses/gpl-3.0.html.
   */
  
  /**
   * Package that contains the planning agent along with its data structures.
   */
  package controller;
  
  import java.util.List;
  
  /**
   * Class that represents a PDDL goal. A PDDLSingleGoal object contains a PDDL
   * predicate, a priority with regards to other goals, a flag that indicates
   * whether the goal has to be saved or not and a list of goals to be removed
   * once that goal is reached, if any.
   *
   * @author Vladislav Nikolov Vasilev
   */
  public class PDDLSingleGoal {
      private String goalPredicate;
      private int priority;
      private boolean saveGoal;
      private List<String> removeReachedGoalsList;
  
      /**
       * Class default constructor. Creates a new PDDLSingleGoal instance.
       */
      public PDDLSingleGoal() {
      }
  
      public String getGoalPredicate() {
          return this.goalPredicate;
      }
  
      public void setGoalPredicate(String goalPredicate) {
          this.goalPredicate = goalPredicate;
      }
  
      public int getPriority() {
          return this.priority;
      }
  
      public void setPriority(int priority) {
          this.priority = priority;
      }
  
      public boolean isSaveGoal() {
          return this.saveGoal;
      }
  
      public void setSaveGoal(boolean saveGoal) {
          this.saveGoal = saveGoal;
      }
  
      public List<String> getRemoveReachedGoalsList() {
          return removeReachedGoalsList;
      }
  
      public void setRemoveReachedGoalsList(List<String> removeReachedGoalsList) {
          this.removeReachedGoalsList = removeReachedGoalsList;
      }
  
      @Override
      public String toString() {
          StringBuilder builder = new StringBuilder();
  
          builder.append("\n\n\t### PDDL single goal ###\n");
          builder.append(String.format("\t|--- Goal predicate: %s\n", this.goalPredicate));
          builder.append(String.format("\t|--- Priority: %d\n", this.priority));
          builder.append(String.format("\t|--- Save goal: %s\n", this.saveGoal));
          builder.append(String.format("\t|--- List of reached goals to remove: %s", this.removeReachedGoalsList));
  
          return builder.toString();
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
  
          if (o == null || this.getClass() != o.getClass()) {
              return false;
          }
  
          PDDLSingleGoal that = (PDDLSingleGoal) o;
  
          boolean areEqual;
  
          if (this.removeReachedGoalsList != null && that.removeReachedGoalsList != null) {
              areEqual = this.goalPredicate.equals(that.goalPredicate) &&
                      this.priority == that.priority &&
                      this.saveGoal == that.saveGoal &&
                      this.removeReachedGoalsList.equals(that.removeReachedGoalsList);
          } else if (this.removeReachedGoalsList == null && that.removeReachedGoalsList == null) {
              areEqual = this.goalPredicate.equals(that.goalPredicate) &&
                      this.priority == that.priority &&
                      this.saveGoal == that.saveGoal;
          } else {
              areEqual = false;
          }
  
          return areEqual;
      }
  }
  