org.openurp.edu.program.model.PlanCourseOrdering.scala Maven / Gradle / Ivy

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/*
 * Copyright (C) 2014, The OpenURP Software.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see .
 */

package org.openurp.edu.program.model

object PlanCourseOrdering extends Ordering[PlanCourse] {

  /** 必修排在前，选修中按照学期以及课程代码
   *
   * @param o1
   * @param o2
   * @return
   */
  override def compare(o1: PlanCourse, o2: PlanCourse): Int = {
    val idxDiff = o1.idx - o2.idx
    if (idxDiff == 0) {
      if (o1.compulsory ^ o2.compulsory) {
        if o1.compulsory then -1 else 1
      } else {
        o1 match
          case e: Executable =>
            val termCmp = e.terms.first.compareTo(o2.terms.first)
            if termCmp == 0 then o1.course.code.compareTo(o2.course.code) else termCmp
          case _ =>
            o1.course.code.compareTo(o2.course.code)
      }
    } else {
      idxDiff
    }
  }
}