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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-11885" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-51667991-c4ef-43ae-8a1c-9045a76466fc" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-11885" style="color: #3b73af; text-decoration: none">HHH-11885</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-11885" style="color: #3b73af; text-decoration: none">Merging an entity that uses a static constant @Embeddable in the default constructor modifies the constant</a> </span> </td>
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<td class="has-icon" style="padding: 0; 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-51667991-c4ef-43ae-8a1c-9045a76466fc" 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: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.2.10 </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate-core </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: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 23/Jul/2017 10:48 AM </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">Environment:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.2.10, H2 </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> hibernate jpa </td>
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<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="diekatzeaufdemdach" id="email_diekatzeaufdemdach" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=diekatzeaufdemdach" style="color:#6c797f;; color: #3b73af; text-decoration: none">Andreas Barth</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"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">I am using the following <em>Customer</em> entity with an <em>@Embeddable</em> <em>Address</em>:</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; border-radius: 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
@Entity
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>Customer {
@Id @GeneratedValue
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">Integer</span> id;
<span class="code-keyword" style="color: #000091">private</span> Address address;
<span class="code-keyword" style="color: #000091">public</span> Customer() {
<span class="code-keyword" style="color: #000091">this</span>.address = Address.DEFAULT;
}
<span class="code-keyword" style="color: #000091">public</span> Address getAddress() { <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">this</span>.address; }
}
@Embeddable
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>Address {
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> <span class="code-keyword" style="color: #000091">final</span> Address DEFAULT = <span class="code-keyword" style="color: #000091">new</span> Address(<span class="code-quote" style="color: #009100">"london"</span>);
<span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> city;
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">String</span> getCity() { <span class="code-keyword" style="color: #000091">return</span> city; }
}
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Note that <em>Customer</em> sets its reference to the <em>Address</em> to a static constant default value in its default constructor. The problem is that merging a customer object changes the default <em>Address</em> like this:</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; border-radius: 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
entityManager.merge(<span class="code-keyword" style="color: #000091">new</span> Customer(<span class="code-keyword" style="color: #000091">new</span> Address(<span class="code-quote" style="color: #009100">"paris"</span>)));
<span class="code-comment" style="color: #808080">// the following fails (<span class="code-quote" style="color: #009100; color: #808080">"paris"</span> instead of <span class="code-quote" style="color: #009100; color: #808080">"london"</span>)
</span>assertEquals(<span class="code-quote" style="color: #009100">"london"</span>, Address.DEFAULT.getCity());
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">As a consequence if I merge two transient customers with different addresses within the same transaction they end up having the same addresses when the transaction commits and the address of the customer that is merged first is written to the database with a false value:</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; border-radius: 3px; margin: 9px 0">
<div class="codeContent panelContent" style="padding: 9px 12px">
<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Customer mrsParis = entityManager.merge(<span class="code-keyword" style="color: #000091">new</span> Customer(<span class="code-keyword" style="color: #000091">new</span> Address(<span class="code-quote" style="color: #009100">"paris"</span>)));
Customer mrBerlin = entityManager.merge(<span class="code-keyword" style="color: #000091">new</span> Customer(<span class="code-keyword" style="color: #000091">new</span> Address(<span class="code-quote" style="color: #009100">"berlin"</span>)));
<span class="code-comment" style="color: #808080">// the following fails (<span class="code-quote" style="color: #009100; color: #808080">"berlin"</span> instead of <span class="code-quote" style="color: #009100; color: #808080">"paris"</span>)
</span>assertEquals( <span class="code-quote" style="color: #009100">"paris"</span>, mrsParis.getAddress().getCity() );
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">This problem does not occur in EclipseLink.</p> </td>
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