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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/HSEARCH" style="color: #3b73af; text-decoration: none">Hibernate Search</a> / <a href="https://hibernate.atlassian.net/browse/HSEARCH-1852" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-newfeature-2351c692-c12f-4b03-8249-97f1ee6533bb" height="16" width="16" border="0" align="absmiddle" alt="New Feature" style="vertical-align: text-bottom" /></a> <a href="https://hibernate.atlassian.net/browse/HSEARCH-1852" style="color: #3b73af; text-decoration: none">HSEARCH-1852</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/HSEARCH-1852" style="color: #3b73af; text-decoration: none">Create extension point for plugging in Criteria providers</a> </span>
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query
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Created:
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09/Apr/2015 02:43 AM
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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="gunnar.morling" id="email_gunnar.morling" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=gunnar.morling" style="color:#6c797f;; color: #3b73af; text-decoration: none">Gunnar Morling</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><a href="https://hibernate.atlassian.net/browse/HSEARCH-1793" title="CriteriaObjectInitializer causes too many object loads in cross hierarchy queries" class="issue-link" data-issue-key="HSEARCH-1793" style="color: #3b73af; text-decoration: none">HSEARCH-1793</a> fixes an issue where cross-hierarchy queries (i.e. queries relating to entities with different id types and/or id property names) would fail. The fix for <a href="https://hibernate.atlassian.net/browse/HSEARCH-1793" title="CriteriaObjectInitializer causes too many object loads in cross hierarchy queries" class="issue-link" data-issue-key="HSEARCH-1793" style="color: #3b73af; text-decoration: none">HSEARCH-1793</a> creates a separate <tt>Criteria</tt> object for each hierarchy present in the ids to be loaded from the database. </p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">This conflicts though with the <tt>FullTextQuery#setCriteriaQuery()</tt> API which allows to pass in a single criteria object. One idea would be to deprecate and eventually remove <tt>setCriteriaQuery()</tt> and provide an extension point instead which allows to provide a custom criteria instance per entity type:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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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">
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">interface</span> CriteriaProvider {
Criteria getCriteria(<span class="code-object" style="color: #910091">Class</span><?> entityType);
}
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">And:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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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">
<span class="code-keyword" style="color: #000091">final</span> FullTextSession fullTextSession = ...;
List<?> results = fullTextSession.createFullTextQuery( query )
.setCriteriaProvider(
<span class="code-keyword" style="color: #000091">new</span> CriteriaProvider {
<span class="code-keyword" style="color: #000091">public</span> Criteria getCriteria(<span class="code-object" style="color: #910091">Class</span><?> entityType) {
<span class="code-comment" style="color: #808080">// <span class="code-keyword" style="color: #000091; color: #808080">for</span> Book add a fetch join, everything <span class="code-keyword" style="color: #000091; color: #808080">else</span> is defaulted
</span> <span class="code-keyword" style="color: #000091">if</span> ( entityType == Book.class ) {
<span class="code-keyword" style="color: #000091">return</span> fullTextSession.createCriteria( Book.class ).setFetchMode( <span class="code-quote" style="color: #009100">"authors"</span>, FetchMode.JOIN );
}
<span class="code-keyword" style="color: #000091">else</span> {
<span class="code-keyword" style="color: #000091">return</span> fullTextSession.createCriteria( entityType );
}
}
}
)
.list();
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">On a related note, <tt>org.hibernate.search.jpa.FullTextQuery#setCriteriaQuery()</tt> expects a <tt>org.hibernate.Criteria</tt> instance instead of the JPA counter-part.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Probably it'd make sense if the extension point described above works with the JPA criteria API in general, given that the Hibernate Criteria API is to be considered deprecated as per the <a href="https://docs.jboss.org/hibernate/orm/5.0/devguide/en-US/html_single/#d5e5497" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">ORM dev guide</a>.</p>
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