Music.java

/***
 * Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 * 
 * 	http://www.apache.org/licenses/LICENSE-2.0 
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and 
 * limitations under the License. 
 */
package br.com.caelum.vraptor.musicjungle.model;

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

import javax.persistence.Entity;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToMany;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

import org.hibernate.validator.constraints.NotEmpty;

import br.com.caelum.vraptor.musicjungle.enums.MusicType;

/**
 * Music entity representing the table Music from 
 * the database. A persisted object of this class 
 * represents a record in the database.
 */
@Entity 
public class Music {

	@Id
	@GeneratedValue
	private Long id;

	@NotEmpty
	@Size(min = 6)
	private String title;

    @NotEmpty
    @Size(min = 6)
	private String description;

	@ManyToMany(mappedBy = "musics")
	private Set<User> owners = new HashSet<>();

	@NotNull
	@Enumerated(EnumType.STRING)
	private MusicType type;

	public String getDescription() {
		return description;
	}

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

	public Long getId() {
		return id;
	}

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

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public MusicType getType() {
		return type;
	}

	public void setType(MusicType type) {
		this.type = type;
	}
	
	public Set<User> getOwners() {
		return owners;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		return result;
	}

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

	@Override
	public String toString() {
		return "Music [id=" + id + ", title=" + title + 
			", description=" + description + ", type=" + type + "]";
	}
	
}