Course.java

/**
 *     Copyright SocialSite (C) 2009
 *
 *     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 <http://www.gnu.org/licenses/>.
 */

package com.socialsite.persistence;

import java.util.Date;
import java.util.HashSet;
import java.util.Set;

public class Course implements AbstractDomain
{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private long id;

	private String name;
	private String description;
	private byte[] image;
	private byte[] thumb;

	private University university;

	private Staff staff;

	private Set<Student> students = new HashSet<Student>();

	private Date lastModified;

	private Set<Question> questions = new HashSet<Question>();

	private Set<Note> notes = new HashSet<Note>();

	public Course()
	{
	}

	public Course(final String name, final Staff staff)
	{
		setName(name);
		setStaff(staff);
		addUniversity(staff.getUniversity());
		setLastModified(new Date());
	}

	public Course(final String name, final Staff staff, final University university)
	{
		setName(name);
		setStaff(staff);
		addUniversity(university);
		setLastModified(new Date());
	}

	public void addQuestions(final Question question)
	{
		getQuestions().add(question);
		question.setCourse(this);
	}

	public void addStudents(final Student student)
	{
		getStudents().add(student);
		student.getCourses().add(this);
	}

	public void addUniversity(final University university)
	{
		setUniversity(university);
		university.getCourses().add(this);
	}

	/**
	 * changes the profile image
	 * 
	 * @param image
	 *            image data in byte[]
	 */
	public void changeImage(final byte[] image)
	{
		this.image = image;
		setLastModified(new Date());
	}


	/**
	 * changes the thumb
	 * 
	 * @param thumb
	 *            thumb data in byte[]
	 */
	public void changeThumb(final byte[] thumb)
	{
		this.thumb = thumb;
		setLastModified(new Date());
	}

	@Override
	public boolean equals(final Object obj)
	{
		if (this == obj)
		{
			return true;
		}
		if (obj == null)
		{
			return false;
		}
		if (getClass() != obj.getClass())
		{
			return false;
		}
		final Course other = (Course)obj;
		if (id != other.id)
		{
			return false;
		}
		return true;
	}

	public long getId()
	{
		return id;
	}

	public byte[] getImage()
	{
		return image;
	}

	public Date getLastModified()
	{
		return lastModified;
	}

	public String getName()
	{
		return name;
	}

	public Set<Question> getQuestions()
	{
		return questions;
	}

	public Staff getStaff()
	{
		return staff;
	}

	public Set<Student> getStudents()
	{
		return students;
	}

	public byte[] getThumb()
	{
		return thumb;
	}

	public University getUniversity()
	{
		return university;
	}

	@Override
	public int hashCode()
	{
		final int prime = 31;
		int result = 1;
		result = prime * result + (int)(id ^ id >>> 32);
		return result;
	}

	public void setId(final long id)
	{
		this.id = id;
	}

	public void setImage(final byte[] image)
	{
		this.image = image;
	}

	public void setLastModified(final Date lastModified)
	{
		this.lastModified = lastModified;
	}

	public void setName(final String name)
	{
		this.name = name;
	}

	public void setQuestions(final Set<Question> questions)
	{
		this.questions = questions;
	}

	public void setStaff(final Staff staff)
	{
		this.staff = staff;
	}

	public void setStudents(final Set<Student> students)
	{
		this.students = students;
	}

	public void setThumb(final byte[] thumb)
	{
		this.thumb = thumb;
	}

	public void setUniversity(final University university)
	{
		this.university = university;
	}

	public String getDescription()
	{
		return description;
	}

	public void setDescription(String description)
	{
		this.description = description;
	}

	public void setNotes(Set<Note> notes)
	{
		this.notes = notes;
	}

	public Set<Note> getNotes()
	{
		return notes;
	}


}