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[英]How to generate a map in java 8 from a list in hibernate single table strategy for the below scenario
[英]How to prevent Hibernate to generate tables as mush as Entities in single table strategy?
下面的代碼是我的對象模型,我需要為這些實體創建兩個表。 一個用於InheritanceType.JOINED
策略,另一個用於InheritanceType.SINGLE_TABLE
策略。 但是不幸的是,Hibernate創建的表就像實體一樣。 我該怎么辦?
提前致謝。
@MappedSuperClass
public abstract class EntityObject implements Cloneable, Serializable {
private Long id;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
@Entity
@Inheritance(strategy = InheritanceType.JOINED)
public class SuperParent extends EntityObject{
private String lastName;
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
}
@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "d_type", discriminatorType = DiscriminatorType.STRING)
public class Parent extends SuperParent {
private String firstName;
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
}
@Entity
@DiscriminatorValue("Child1")
public class Child1 extends Parent {
private String age;
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
}
@Entity
@DiscriminatorValue("child2")
public class Child2 extends Parent {
private String hairColor;
public String getHairColor() {
return hairColor;
}
public void setHairColor(String hairColor) {
this.hairColor = hairColor;
}
}
不支持將聯接的繼承策略與其他繼承策略混合使用。 Hibernate僅支持按類繼承表與按子繼承表的混合。
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