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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-10428" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-24f76fb2-51ad-4271-af59-f568e4eebd7d" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-10428" style="color: #3b73af; text-decoration: none">HHH-10428</a> </td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HHH-10428" style="color: #3b73af; text-decoration: none">@MappedSuperclass with generics - no java type resolving</a> </span> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Change By:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="Imba" id="email_Imba" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=Imba" style="color:#6c797f;; color: #3b73af; text-decoration: none">Imba</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <span class="diffcontext">To a lot of problems with @MappedSuperclass with generics.<br><br>We have:<br>{code:java}<br>@MappedSuperclass<br>public class AbstractEntity<ID extends Serializable> {<br> @Id<br> @GeneratedValue(strategy = GenerationType.IDENTITY)<br> protected ID id;<br>...<br>}<br>{code}<br><br>And we have:<br><br>{code:java}<br>@Entity<br>@Table(name = "SomeEntity")<br>public class SomeEntity extends AbstractEntity<Integer> {<br> <br>}<br>{code}<br><br>Next, jpa criteria:<br>{code:java}<br>public Predicate toPredicate(Root root, CriteriaQuery criteriaQuery, CriteriaBuilder criteriaBuilder) {<br> //Here we have - Serializable, but expected Integer.<br> root.get("id").getJavaType();<br> return ...;<br> }<br>{code}<br><br>If the generic parameter is just type, we have Object at getJavaType().</span> <span class="diffaddedchars" style="background-color:#ddfade;"><br><br>TEST CASE:<br>I'm try to execute criteria query and have this test case:<br><br>{code:java}<br>CriteriaBuilder builder = entityManager.getCriteriaBuilder();<br> CriteriaQuery<SomeEntity> criteria = builder.createQuery(SomeEntity.class);<br><br> Root<SomeEntity> root = criteria.from(SomeEntity.class);<br><br> Specification<SomeEntity> specification = (roott, criteriaQuery, criteriaBuilder) -> {<br> Path<Integer> idField = root.get("id");<br> assertEquals(idField.getJavaType(), Integer.class);<br> return criteriaBuilder.equal(idField, 1);<br> };<br><br> criteria.where(specification.toPredicate(root, criteria, builder));<br> criteria.select(root);<br><br> assertEquals(entityManager.createQuery(criteria).getResultList().size(), 1);<br>{code}<br><br>And i have assertion exception - getJavaType() returns Serializable.<br>In my project requirements i need to know type of fields in MappedSuperclass.</span> </td>
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