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Here's our class Entity
@MappedSuperclass
public abstract class Entity implements Identifiable<String>, Serializable
{
public static final String PROPERTY_NAME_ID = "id";
@Id
@GeneratedValue(generator = "uuid2")
@GenericGenerator(name = "uuid2", strategy = "uuid2")
@Column(columnDefinition = "varchar", unique = true, nullable = false)
private String id;
@Override
public String getId() { return id; }
@Override
public void setId(final String id) { this.id = id; }
@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(final Object obj)
{
if (this == obj) { return true; }
if (obj == null) { return false; }
if (getClass() != obj.getClass())
{ return false; }
final Entity other = (Entity) obj;
if (id == null)
{
if (other.id != null) { return false; }
}
else if (!id.equals(other.id)) { return false; }
return true;
}
}
and here Description Entity
@MappedSuperclass
public abstract class DescriptionEntity extends Entity
{
@Column(name = "description_lang1", nullable = false, length = 100)
private String descriptionLang1;
@Column(name = "description_lang2", length = 100)
private String descriptionLang2;
@Column(name = "description_lang3", length = 100)
private String descriptionLang3;
public String getDescriptionLang1() { return this.descriptionLang1; }
public void setDescriptionLang1(final String descriptionLang1) { this.descriptionLang1 = descriptionLang1; }
public String getDescriptionLang2() { return this.descriptionLang2; }
public void setDescriptionLang2(final String descriptionLang2) { this.descriptionLang2 = descriptionLang2; }
public String getDescriptionLang3() { return this.descriptionLang3; }
public void setDescriptionLang3(final String descriptionLang3) { this.descriptionLang3 = descriptionLang3; }
}
now you have the whole hierarchy
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