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나는 다음과 같은 클래스가 :최대 절전 모드 단일 테이블 상속 가입
가이드 클래스 :
public abstract class Guide
{
private Long idGuide;
private String name;
private GuideContainer parent;
/** GETTERS & SETTERS*/
}
GuideContainer :
public class GuideContainer extends Guide
{
private Guide children;
/** GETTER & SETTERS */
}
GuideFile 다음과
public class GuideFile extends Guide
{
private String uri;
/**GETTERS & SETTERS */
}
을 다음 매핑 : 가이드 :
<hibernate-mapping>
<class name="Guide" table="guides" abstract="true">
<id name="idGuide" type="integer" column="idGuide">
<generator class="assigned" />
</id>
<property name="name" type="java.lang.String" column="name" />
<discriminator column="type" type="java.lang.String" />
<many-to-one class="GuideContainer" fetch="join" name="parent">
<column name="parent" />
</many-to-one>
</class>
</hibernate-mapping>
GuideFile :
<hibernate-mapping>
<subclass extends="Guide" name="GuideFile" discriminator-value="file">
<property name="uri" type="java.lang.String" column="uri" />
</subclass>
</hibernate-mapping>
GuideContainer :
<hibernate-mapping>
<subclass extends="Guide" name="GuideContainer" discriminator-value="container">
<set fetch="select" inverse="true" lazy="true" name="children" sort="unsorted" table="children">
<key>
<column name="parent" not-null="false" />
</key>
<one-to-many class="Guide" />
</set>
</subclass>
</hibernate-mapping>
나는 주어진 부모
Query query = getSession().createQuery("from Guide g where parent = :parent order by type").setParameter("parent", parent);
List<Guide> guides= query.list();
return guides;
내가 모든 가이드를 얻으려고 팔로워 받기 보내고 예외 : 내가 잘못 뭐하는 거지
java.lang.IllegalArgumentException: object is not an instance of declaring class
:
IllegalArgumentException occurred calling getter of Guide.idGuide
그리고 그 이후
?