QuizQuestionMining.java

/**
 * File ./src/main/java/de/lemo/dms/db/mapping/QuizQuestionMining.java
 * Lemo-Data-Management-Server for learning analytics.
 * Copyright (C) 2013
 * Leonard Kappe, Andreas Pursian, Sebastian Schwarzrock, Boris Wenzlaff
 * 
 * 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
 * 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 <http://www.gnu.org/licenses/>.
**/

/**
 * File ./main/java/de/lemo/dms/db/mapping/QuizQuestionMining.java
 * Date 2013-01-24
 * Project Lemo Learning Analytics
 */

package de.lemo.dms.db.mapping;

import java.util.Map;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

import de.lemo.dms.db.mapping.abstractions.IMappingClass;

/** This class represents the relationship between quiz and questions. */
@Entity
@Table(name = "quiz_question")
public class QuizQuestionMining implements IMappingClass {

	private long id;
	private QuizMining quiz;
	private QuestionMining question;
	private Long platform;

	@Override
	public boolean equals(final IMappingClass o)
	{
		if (!(o instanceof QuizQuestionMining)) {
			return false;
		}
		if ((o.getId() == this.getId()) && (o instanceof QuizQuestionMining)) {
			return true;
		}
		return false;
	}

	@Override
	public int hashCode() {
		return (int) id;
	}
	
	
	/**
	 * standard getter for the attribute id
	 * 
	 * @return the identifier for the association between quiz and question
	 */
	@Override
	@Id
	public long getId() {
		return this.id;
	}

	/**
	 * standard setter for the attribute id
	 * 
	 * @param id
	 *            the identifier for the association between quiz and question
	 */
	public void setId(final long id) {
		this.id = id;
	}

	/**
	 * standard getter for the attribute quiz
	 * 
	 * @return the quiz which is associated
	 */
	@ManyToOne(fetch=FetchType.LAZY)
	@JoinColumn(name="quiz_id")
	public QuizMining getQuiz() {
		return this.quiz;
	}

	/**
	 * standard setter for the attribute quiz
	 * 
	 * @param quiz
	 *            the quiz which is associated
	 */
	public void setQuiz(final QuizMining quiz) {
		this.quiz = quiz;
	}

	/**
	 * parameterized setter for the attribute quiz
	 * 
	 * @param quiz
	 *            the id of the quiz which is associated
	 * @param quizMining
	 *            a list of new added quiz, which is searched for the quiz with the id submitted in the quiz parameter
	 * @param oldQuizMining
	 *            a list of quiz in the miningdatabase, which is searched for the quiz with the id submitted in the quiz
	 *            parameter
	 */
	public void setQuiz(final long quiz, final Map<Long, QuizMining> quizMining,
			final Map<Long, QuizMining> oldQuizMining) {

		if (quizMining.get(quiz) != null)
		{
			this.quiz = quizMining.get(quiz);
			quizMining.get(quiz).addQuizQuestion(this);
		}
		if ((this.quiz == null) && (oldQuizMining.get(quiz) != null))
		{
			this.quiz = oldQuizMining.get(quiz);
			oldQuizMining.get(quiz).addQuizQuestion(this);
		}
	}

	/**
	 * standard getter for the attribute question
	 * 
	 * @return the question which is associated
	 */
	@ManyToOne(fetch=FetchType.LAZY)
	@JoinColumn(name="question_id")
	public QuestionMining getQuestion() {
		return this.question;
	}

	/**
	 * standard setter for the attribute question
	 * 
	 * @param question
	 *            the question which is associated
	 */
	public void setQuestion(final QuestionMining question) {
		this.question = question;
	}

	/**
	 * parameterized setter for the attribute question
	 * 
	 * @param question
	 *            the quiz which is associated
	 * @param questionMining
	 *            a list of new added question, which is searched for the question with the id submitted in the question
	 *            parameter
	 * @param oldQuestionMining
	 *            a list of question in the miningdatabase, which is searched for the question with the id submitted in
	 *            the question parameter
	 */
	public void setQuestion(final long question, final Map<Long, QuestionMining> questionMining,
			final Map<Long, QuestionMining> oldQuestionMining) {

		if (questionMining.get(question) != null)
		{
			this.question = questionMining.get(question);
			questionMining.get(question).addQuizQuestion(this);
		}
		if ((this.question == null) && (oldQuestionMining.get(question) != null))
		{
			this.question = oldQuestionMining.get(question);
			oldQuestionMining.get(question).addQuizQuestion(this);
		}
	}

	@Column(name="platform")
	public Long getPlatform() {
		return this.platform;
	}

	public void setPlatform(final Long platform) {
		this.platform = platform;
	}
}