AbstractEntity.java

/**
 * == @Spearal ==>
 * 
 * Copyright (C) 2014 Franck WOLFF & William DRAI (http://www.spearal.io)
 *
 * 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 org.spearal.jpa2.model;

import java.io.Serializable;
import java.util.UUID;

import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;
import javax.persistence.Version;

/**
 * @author Franck WOLFF
 */
@MappedSuperclass
public abstract class AbstractEntity implements Serializable {

	private static final long serialVersionUID = 1L;

	@Id @GeneratedValue
    private Long id;
    
	@Column(name="ENTITY_UID", unique=true, nullable=false, updatable=false, length=36)
    private String uid;

    @Version
    private Long version;

	public AbstractEntity() {
		this.uid = UUID.randomUUID().toString();
	}

	public Long getId() {
		return id;
	}

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

	public String getUid() {
		return uid;
	}

	public Long getVersion() {
		return version;
	}

	public void backdoorSetVersion(Long version) {
		this.version = version;
	}

	@Override
	public int hashCode() {
		return uid.hashCode();
	}

	@Override
	public boolean equals(Object obj) {
		if (obj == this)
			return true;
		if (!(obj instanceof AbstractEntity))
			return false;
		return uid.equals(((AbstractEntity)obj).uid);
	}
}