AbstractEntity.java

package org.lightadmin.demo.model;

import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.MappedSuperclass;

@MappedSuperclass
public class AbstractEntity {

	@Id
	@GeneratedValue( strategy = GenerationType.AUTO )
	private Long id;

	public Long getId() {
		return id;
	}

	@Override
	public boolean equals( Object obj ) {
		if ( this == obj ) {
			return true;
		}

		if ( this.id == null || obj == null || !( this.getClass().equals( obj.getClass() ) ) ) {
			return false;
		}

		AbstractEntity that = ( AbstractEntity ) obj;

		return this.id.equals( that.getId() );
	}

	@Override
	public int hashCode() {
		return id == null ? 0 : id.hashCode();
	}
}