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我有一個實體（MediaCostRule），有幾個常規字段並且一個關聯領域與@ElementCollection（MediaCostRuleSource）註釋使用Hibernate屬性投影獲取的關聯，並將它注入到DTO
我也有一個DTO（MediaCostRuleDto）保持該實體字段的子集，並且還包括在同一相關聯地設定
下面是類代碼
@Entity
@Table(name = "media_cost_rules")
public class MediaCostRule extends AdminEntity{
@Id
@GeneratedValue
@Column(name = "media_cost_rule_id")
private Integer id;
@Column(name = "name")
@Length(max = 100)
private String name;
@Column(name="is_enabled")
private Boolean enabled;
@ManyToOne
@JoinColumn(name = "brand_id")
private Brand brand;
@ElementCollection(fetch = FetchType.EAGER)
@CollectionTable(name = "media_cost_rule_sources", joinColumns = @JoinColumn(name = "media_cost_rule_id"))
private Set<MediaCostRuleSource> mediaCostRuleSources = new HashSet<MediaCostRuleSource>();
==================== =================================================
@Embeddable
public class MediaCostRuleSource {
@Column(name = "source_name")
private String sourceName;
@Column(name = "ordinal")
private Integer ordinal;
=========================================== =======================
public class MediaCostRuleDto extends AbstractAdminDto {
@Size(min = 1)
private Set<MediaCostRuleSource> mediaCostRuleSources = new HashSet<MediaCostRuleSource>();
@NotNull
private String name;
==================== ================================================== =====
現在我想要的是使用Projections來獲取mediaCostRuleSources和我的實體的名稱，並直接注入到我的MediaCostRuleDto（使用AliasToBeanResultTransformer）。
我曾嘗試下面的代碼：
@Test
public void findByIdDirectTest2(){
Criteria crit = sessionFactory.getCurrentSession().createCriteria(MediaCostRule.class).setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
ProjectionList projectionList = Projections.projectionList();
projectionList.add(Projections.property("name").as("name"));
projectionList.add(Projections.property("mediaCostRuleSources").as("mediaCostRuleSources"));
crit.setProjection(projectionList);
List list = crit.list();
}
但我總是得到異常（ArrayIndexOutOfBoundsException異常）
必須有某種方式做這樣的事情與Hibernate
你知識 ？？
Yosi