获取语​​言环境实体hibernate hql

Question

我得到了这个db模型，我希望得到Continent并通过主要对象获取特定语言的国家/地区。我写了一个成功返回国家的SQL sentece（包装在Object [] []上），但正如我上面所说，我需要Continent-＆gt; ContinentLocale-＆gt; Country-＆gt; CountryLocale，我无法编写正确的HQL

我使用Hibernate 4.3.5

SQL句子

select C.idcountry, CL.name,D.idcontinent,DL.name from country C 
inner join country_locale CL on c.idcountry=cl.idcountry and cl.idlanguage=2 
inner join continent D on c.idcontinent=D.idcontinent 
inner join continent_locale DL on D.idcontinent=DL.idcontinent and DL.idlanguage=2;

Continent.java

@Entity
@Table(name="continent")
public class Continent implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@Column(name="IDcontinent")
private Integer idContinent;

@OneToMany
@JoinColumn(name="IDcontinent")
private Set<Country> countries;

@OneToMany(mappedBy="primaryKey.continent")
private Set<ContinentLocale> continentLocale;
}

ContinentLocale.java

@Entity
@Table(name="continent_locale")
@AssociationOverrides({
@AssociationOverride(name = "primaryKey.continent", joinColumns = @JoinColumn(name = "IDcontinent")),
@AssociationOverride(name = "primaryKey.language", joinColumns = @JoinColumn(name = "IDlanguage"))
    })
public class ContinentLocale implements Serializable {


private static final long serialVersionUID = 1L;

@EmbeddedId
private ContinentLocalePK primaryKey=new ContinentLocalePK();

@Column(name="name",nullable=false,length=50)
private String name;

@Transient
public Continent getContinent(){
    return getPrimaryKey().getContinent();
}

public void setContinent(Continent continent){
    getPrimaryKey().setContinent(continent);
}

@Transient
public Language getLanguage(){
    return getPrimaryKey().getLanguage();
}

public void setLanguage(Language language){
    getPrimaryKey().setLanguage(language);
}
   }

Country.java

@Entity
@Table(name="country")
  public class Country implements Serializable{

private static final long serialVersionUID = 1L;

@Id
@Column(name="IDcountry")
private Integer idCountry;


@OneToMany(mappedBy="primaryKey.country")
private Set<CountryLocale> countryLocale;
}

CountryLocale

@Entity
@Table(name="country_locale")
@AssociationOverrides({
@AssociationOverride(name = "primaryKey.country", joinColumns = @JoinColumn(name = "IDcountry")),

@AssociationOverride（name =“primaryKey.language”，joinColumns = @JoinColumn（name =“IDlanguage”））         }）      公共类CountryLocale实现Serializable {

private static final long serialVersionUID = 1L;

@EmbeddedId
private CountryLocalePK primaryKey=new CountryLocalePK();

@Column(name="name",nullable=false,length=50)
private String name;

@Transient
public Country getCountry(){
    return getPrimaryKey().getCountry();
}

public void setCountry(Country country){
    getPrimaryKey().setCountry(country);
}

@Transient
public Language getLanguage(){
    return getPrimaryKey().getLanguage();
}

public void setLanguage(Language language){
    getPrimaryKey().setLanguage(language);
}}

提前致谢！

Answer 1

我只是找到了解决方案，并且对于上面映射的hql语句是：

获取国家/地区语言

HQL =“从大陆D内连接中选择不同的CL D.continentLocale DL内连接D.countries C内连接C.countryLocale CL其中CL.primaryKey.language.idLanguage = 2”

获取大陆区域设置

HQL =“从大陆D内部连接选择DL D.continentLocale DL其中DL.primaryKey.language.idLanguage = 2”