aramzamzam-commons/commons-hibernate/src/main/java/net/aramzamzam/commons/hibernate/entities/BasicEntity.java

   1 package net.aramzamzam.commons.hibernate.entities;
   2
   3 import java.io.Serializable;
   4
   5 import javax.persistence.GeneratedValue;
   6 import javax.persistence.GenerationType;
   7 import javax.persistence.Id;
   8 import javax.persistence.MappedSuperclass;
   9
  10 /**
  11  * @author James Carman
  12  */
  13 @SuppressWarnings("unchecked")
  14 @MappedSuperclass
  15 public class BasicEntity implements Serializable, Comparable {
  16         private static final long serialVersionUID = 1L;
  17         protected Long id;
  18
  19     public int compareTo(Object o) {
  20         return String.valueOf(this).compareTo(String.valueOf(o));
  21     }
  22
  23     @Id
  24     @GeneratedValue(strategy = GenerationType.AUTO)
  25     public Long getId() {
  26         return id;
  27     }
  28
  29     // FIXME доступ к этому методу следует сделать private
  30     public void setId(Long id) {
  31         this.id = id;
  32     }
  33
  34     @Override
  35         public int hashCode() {
  36                 final int prime = 31;
  37                 int result = 1;
  38                 result = prime * result + ((id == null) ? 0 : id.hashCode());
  39                 return result;
  40         }
  41     //see http://roald.jteam.nl/?p=25
  42         @Override
  43         public boolean equals(Object obj) {
  44                 if (this == obj)
  45                         return true;
  46                 if (obj == null ||
  47                                         !(
  48                                                         getClass() == obj.getClass()
  49                                                         || getClass().getSuperclass() == obj.getClass().getSuperclass()
  50                                                         || getClass() == obj.getClass().getSuperclass()
  51                                                         || getClass().getSuperclass() == obj.getClass()
  52                                         ))
  53                         return false;
  54                 final BasicEntity other = (BasicEntity) obj;
  55                 if (id != null ? !id.equals(other.getId()) : other.getId() != null)
  56                         return false;
  57                 return true;
  58         }
  59
  60 }