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<td class="page-title-pattern-first-line " style="padding: 0px; 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-9307" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-0ed2f497-765a-47e5-aec7-bbb4b1d5c9be" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HHH-9307" style="color: #3b73af; text-decoration: none">HHH-9307</a>
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<td style="vertical-align: top;; padding: 0px; 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-9307" style="color: #3b73af; text-decoration: none">Generic superclass handled wrongly in criteria metamodel</a> </span>
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Issue Type:
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Affects Versions:
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4.2.7.SP1
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Unassigned
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Components:
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entity-manager
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Created:
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30/Jul/2014 07:08 AM
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Priority:
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Reporter:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="jbrazdil" id="email_jbrazdil" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=jbrazdil" style="color:#6c797f;; color: #3b73af; text-decoration: none">Honza Brázdil</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">We have generic abstract class GenericDependency and several implementing subclasses.</p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@MappedSuperclass
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">abstract</span> class GenericDependency<P, C> <span class="code-keyword" style="color: #000091">extends</span> DatabaseEntity {
@ManyToOne
@JoinColumn(nullable = <span class="code-keyword" style="color: #000091">false</span>)
<span class="code-keyword" style="color: #000091">private</span> P parent;
@ManyToOne
@JoinColumn(nullable = <span class="code-keyword" style="color: #000091">false</span>)
<span class="code-keyword" style="color: #000091">private</span> C child;
...
}
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
@Table(uniqueConstraints = @UniqueConstraint(columnNames = { <span class="code-quote" style="color: #009100">"parent_id"</span>, <span class="code-quote" style="color: #009100">"child_id"</span> }))
<span class="code-keyword" style="color: #000091">public</span> class ArtifactArtifactDependency <span class="code-keyword" style="color: #000091">extends</span> GenericDependency<Artifact, Artifact> <span class="code-keyword" style="color: #000091">implements</span> Serializable {
...
}
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
@Table(uniqueConstraints = @UniqueConstraint(columnNames = { <span class="code-quote" style="color: #009100">"parent_id"</span>, <span class="code-quote" style="color: #009100">"child_id"</span> }))
<span class="code-keyword" style="color: #000091">public</span> class ArtifactReleaseDependency <span class="code-keyword" style="color: #000091">extends</span> GenericDependency<Artifact, Release> <span class="code-keyword" style="color: #000091">implements</span> Serializable {
...
}
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">In persistence.xml we have them in this order:</p>
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<pre class="code-xml" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal"><span class="code-tag" style="color: #000091"><class></span>org.jboss.buildtracker.database.dao.model.dependency.ArtifactArtifactDependency<span class="code-tag" style="color: #000091"></class></span><span class="code-tag" style="color: #000091"><class></span>org.jboss.buildtracker.database.dao.model.dependency.ArtifactDeveloperDependency<span class="code-tag" style="color: #000091"></class></span><span class="code-tag" style="color: #000091"><class></span>org.jboss.buildtracker.database.dao.model.dependency.ArtifactLicenseDependency<span class="code-tag" style="color: #000091"></class></span><span class="code-tag" style="color: #000091"><class></span>org.jboss.buildtracker.database.dao.model.dependency.ArtifactReleaseDependency<span class="code-tag" style="color: #000091"></class></span><span class="code-tag" style="color: #000091"><class></span>org.jboss.buildtracker.database.dao.model.dependency.ProductProjectDependency<span class="code-tag" style="color: #000091"></class></span><span class="code-tag" style="color: #000091"><class></span>org.jboss.buildtracker.database.dao.model.dependency.ProjectLicenseDependency<span class="code-tag" style="color: #000091"></class></span><span class="code-tag" style="color: #000091"><class></span>org.jboss.buildtracker.database.dao.model.dependency.ProjectSyncInfo<span class="code-tag" style="color: #000091"></class></span><span class="code-tag" style="color: #000091"><class></span>org.jboss.buildtracker.database.dao.model.dependency.ReleaseDeveloperDependency<span class="code-tag" style="color: #000091"></class></span><span class="code-tag" style="color: #000091"><class></span>org.jboss.buildtracker.database.dao.model.dependency.ReleaseLicenseDependency<span class="code-tag" style="color: #000091"></class></span>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The problem occured when using criteria api:</p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Root<ArtifactReleaseDependency> d2 = cq.from(ArtifactReleaseDependency.class);
Path<Release> child = d2.<Release>get(<span class="code-quote" style="color: #009100">"child"</span>);
Path<Project> project = child.<Project>get(<span class="code-quote" style="color: #009100">"project"</span>);
</pre>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">In child there were reference to Artifact instead of Release so it throws exception on the 3rd line as it can't found project attribute on Artifact.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The reason is that when building metamodel, ArtifactArtifactDependency is processed first and it's superclass GenericDependency metamodel is build with attributes child and parent as Artifact.<br /> When building metamoded for ArtifactReleaseDependency, the superclass metamodel is reused resulting in wrong thinking that child attribute is Artifact instead of Release.</p>
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