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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-10728" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-56aa4291-8600-428b-b204-d6ea81136c92" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-10728" style="color: #3b73af; text-decoration: none">HHH-10728</a> </td>
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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-10728" style="color: #3b73af; text-decoration: none">NullPointerException when using CriteriaBuilder.selectCase with CriteriaBuilder.equal</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">Issue Type:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-56aa4291-8600-428b-b204-d6ea81136c92" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </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">Affects Versions:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.1.0, 4.3.11 </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">Assignee:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </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">Components:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> query-criteria </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">Created:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 05/May/2016 02:28 AM </td>
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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"> hibernate jpa21 criteria </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">Priority:</th>
<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-433d21db-b0b0-470b-923d-a737358075cf" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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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="raykou" id="email_raykou" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=raykou" style="color:#6c797f;; color: #3b73af; text-decoration: none">raykou</a> </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">Original Estimate:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top">16h</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">Remaining Estimate: </th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top">16h</td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0; margin-top: 0">Sample code:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -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; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Set<<span class="code-object" style="color: #910091">Long</span>> depts = <span class="code-keyword" style="color: #000091">new</span> HashSet<>();
...
Case<<span class="code-object" style="color: #910091">Boolean</span>> selectCase = builder.selectCase();
selectCase.otherwise(<span class="code-keyword" style="color: #000091">false</span>);
selectCase.when(
builder.and(
builder.equal(join.get(<span class="code-quote" style="color: #009100">"actionPartyType"</span>), ActionPartyType.DEPARTMENT),
join.get(<span class="code-quote" style="color: #009100">"actionPartyId"</span>).in(depts)
),
<span class="code-keyword" style="color: #000091">true</span>);
...
predicate = builder.and(predicate, {color:red}builder.equal(selectCase, <span class="code-keyword" style="color: #000091">true</span>){color});
query.where(predicate);
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">It find that CriteriaBuilder.equal will throws NullPointerException, below is the stacktrace</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -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; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Caused by: java.lang.NullPointerException
at java.lang.<span class="code-object" style="color: #910091">Class</span>.isAssignableFrom(Native Method)
at org.hibernate.jpa.criteria.ValueHandlerFactory.isNumeric(ValueHandlerFactory.java:52)
at org.hibernate.jpa.criteria.predicate.ComparisonPredicate.<init>(ComparisonPredicate.java:52)
at org.hibernate.jpa.criteria.CriteriaBuilderImpl.equal(CriteriaBuilderImpl.java:367)
at com.xxx.business.dao.wf.impl.ProcessInstanceDAOImpl$1.prepareQuery(ProcessInstanceDAOImpl.java:116)
at com.xxx.business.dao.wf.impl.ProcessInstanceDAOImpl$1.prepareQuery(ProcessInstanceDAOImpl.java:1)
at com.xxx.business.searching.CriteriaQuerySearch.executeGetRowsCount(CriteriaQuerySearch.java:78)
at com.xxx.business.searching.Search$2.call(Search.java:124)
at com.xxx.business.searching.Search$2.call(Search.java:1)
at com.xxx.business.dao.impl.DataAccessSupportImpl.executeWithTransaction(DataAccessSupportImpl.java:224)
... 166 more
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">After checking the source code, it suspected that there is a bug in </p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -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; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
org.hibernate.jpa.criteria.expression.SearchedCaseExpression
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"> cause the selectCase.getJavaType() always return null.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The javaType override logic of SearchedCaseExpression actually do nothing:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Class</span><R> javaType; <span class="code-comment" style="color: #808080">// overrides the javaType kept on tuple-impl so that we can adjust it
</span>
...
<span class="code-keyword" style="color: #000091">public</span> Case<R> when(Expression<<span class="code-object" style="color: #910091">Boolean</span>> condition, Expression<? <span class="code-keyword" style="color: #000091">extends</span> R> result) {
WhenClause whenClause = <span class="code-keyword" style="color: #000091">new</span> WhenClause( condition, result );
whenClauses.add( whenClause );
adjustJavaType( result );
<span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">this</span>;
}
@SuppressWarnings({<span class="code-quote" style="color: #009100">"unchecked"</span>})
<span class="code-keyword" style="color: #000091">private</span> void adjustJavaType(Expression<? <span class="code-keyword" style="color: #000091">extends</span> R> exp) {
<span class="code-keyword" style="color: #000091">if</span> ( javaType == <span class="code-keyword" style="color: #000091">null</span> ) {
javaType = (<span class="code-object" style="color: #910091">Class</span><R>) exp.getJavaType();
}
}
...
<span class="code-keyword" style="color: #000091">public</span> Expression<R> otherwise(Expression<? <span class="code-keyword" style="color: #000091">extends</span> R> result) {
<span class="code-keyword" style="color: #000091">this</span>.otherwiseResult = result;
adjustJavaType( result );
<span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">this</span>;
}
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I think it should call AbstractTupleElement.resetJavaType instead of adjustJavaType</p> </td>
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