部分复合密钥的Hibernate映射

我有如下的表格结构，一对多和多对一 映射到组合键之一

@Entity
@Table(name = "parent", catalog = "testdb")
public class Parent implements java.io.Serializable {

private Long fileId;

private Set<Children> children = new HashSet<Children>();

@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "file_id", unique = true, nullable = false)
public Long getFileId() {
    return this.fileId;
}

public void setFileId(Long fileId) {
    this.fileId = fileId;
}

@OneToMany(mappedBy = "id.childrenIc")
public Set<Children> getChildren() {
    return children;
}

public void setChildren(Set<Children> children) {
    this.children= children;
}
}


@Entity
@Table(name = "children", catalog = "testdb")
public class Children implements java.io.Serializable {
private ChildrenId id;

@EmbeddedId
@AttributeOverrides({
    @AttributeOverride(name = "childId", column = @Column(name = "child_id", nullable = false)),
    @AttributeOverride(name = "childrenIc", column = @Column(name = "child_ic", nullable = false)) })
public ChildrenId getId () {
    return this.id;
}

public void setId(ChildrenId id) {
    this.id = id;
}
}


@Embeddable
public class ChildrenId implements java.io.Serializable {
private long childId;
private Children childIc;

@ManyToOne
public Children getChildIc() {
    return childIc;
}

public void setChildIc(Children childIc) {
    this.childIc= childIc;
}

@Column(name = "child_id", nullable = false)
public long getChildId() {
    return this.childId;
}

    public void setChildId(long childId) {
        this.childId= childId;
    }
}


Criteria criteria = session.createCriteria(Parents.class);
Criteria childCri = criteria.createCriteria("childrenIc");
childCri .add(Restrictions.eq("childId", childId));

它也失败了

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请帮忙，谢谢

请帮助我，我应该如何使用条件进行查询。非常感谢。请帮助我，我应该如何使用条件查询。非常感谢你。

Criteria childCri = criteria.createCriteria("id.childrenIc");