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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-11803" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-f1984fe9-0548-40a8-b3fb-94b0ae939d41" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-11803" style="color: #3b73af; text-decoration: none">HHH-11803</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-11803" style="color: #3b73af; text-decoration: none">HHH015007 error when declaring a conversion using the @Convert attribute</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-f1984fe9-0548-40a8-b3fb-94b0ae939d41" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"> Bug </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"> 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"> 11/Jun/2017 00:18 AM </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"> Mysql environment using Envers and EntityManager </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-static-major-9653766a-244a-460f-bccb-ac489c0d684d" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </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="chris.march.gb" id="email_chris.march.gb" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=chris.march.gb" style="color:#6c797f;; color: #3b73af; text-decoration: none">Chris March</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">There is an issue when configuring a converter to convert a collection into a single field. I have tried as many solutions as I can before submitting this issue and searched the forums for an example that does something similar but to no avail. I simply cant find a way of not getting this error when </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The error I receive is as follows:</p>
<div class="preformatted 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 style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal; white-space: pre; word-break: normal; word-wrap: break-word; word-break: break-all; white-space: pre-wrap">HHH015007: Illegal argument on static metamodel field injection : io.t.c.o.e.b.Booking_#processingFlags; expected type : org.hibernate.metamodel.internal.SingularAttributeImpl; encountered type : javax.persistence.metamodel.ListAttribute
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The field is annotated as follows:</p>
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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">
@Valid
@Convert(converter = ConverterListToString.class)
@Column(columnDefinition = <span class="code-quote" style="color: #009100">"text"</span>)
<span class="code-keyword" style="color: #000091">private</span> List<<span class="code-object" style="color: #910091">Long</span>> bookingIds = <span class="code-keyword" style="color: #000091">new</span> ArrayList<>();
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The converter code is as follows:</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">
@Converter
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">class </span>ConverterListToString
<span class="code-keyword" style="color: #000091">extends</span> org.hibernate.type.descriptor.java.AbstractTypeDescriptor<List>
<span class="code-keyword" style="color: #000091">implements</span> AttributeConverter<List, <span class="code-object" style="color: #910091">String</span>> {
<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> ConverterListToString INSTANCE = <span class="code-keyword" style="color: #000091">new</span> ConverterListToString();
<span class="code-keyword" style="color: #000091">private</span> <span class="code-keyword" style="color: #000091">static</span> <span class="code-keyword" style="color: #000091">final</span> <span class="code-object" style="color: #910091">long</span> serialVersionUID = -4794345758375860474L;
<span class="code-keyword" style="color: #000091">public</span> ConverterListToString() {
<span class="code-keyword" style="color: #000091">super</span>(List.class);
}
@Override
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">String</span> convertToDatabaseColumn(List attribute) {
<span class="code-keyword" style="color: #000091">if</span> (CollectionUtils.isNotEmpty(attribute) && attribute.stream().allMatch(instance -> instance <span class="code-keyword" style="color: #000091">instanceof</span> <span class="code-object" style="color: #910091">Long</span>))
<span class="code-keyword" style="color: #000091">return</span> StringUtils.join(attribute, <span class="code-quote" style="color: #009100">","</span>);
<span class="code-keyword" style="color: #000091">return</span> GeneralUtils.serializeObjectToString(attribute);
}
@Override
<span class="code-keyword" style="color: #000091">public</span> List convertToEntityAttribute(<span class="code-object" style="color: #910091">String</span> dbData) {
<span class="code-keyword" style="color: #000091">if</span> (StringUtils.isEmpty(dbData))
<span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">new</span> ArrayList();
<span class="code-keyword" style="color: #000091">if</span> (Pattern.compile(<span class="code-quote" style="color: #009100">"[0-9,]*"</span>).matcher(dbData).matches()) {
<span class="code-keyword" style="color: #000091">try</span> (Stream<<span class="code-object" style="color: #910091">String</span>> stream = Stream.of(dbData.split(<span class="code-quote" style="color: #009100">","</span>))) {
<span class="code-keyword" style="color: #000091">return</span> stream.map(<span class="code-object" style="color: #910091">Long</span>::parseLong).collect(Collectors.toList());
}
}
<span class="code-keyword" style="color: #000091">return</span> GeneralUtils.deserializeObjectFromString(List.class, dbData, <span class="code-keyword" style="color: #000091">new</span> ArrayList<>());
}
@Override
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">Class</span><List> getJavaTypeClass() {
<span class="code-keyword" style="color: #000091">return</span> List.class;
}
@Override
<span class="code-keyword" style="color: #000091">public</span> List fromString(<span class="code-object" style="color: #910091">String</span> value) {
<span class="code-keyword" style="color: #000091">return</span> convertToEntityAttribute(value);
}
@Override
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">String</span> toString(List value) {
<span class="code-keyword" style="color: #000091">return</span> convertToDatabaseColumn(value);
}
@Override
<span class="code-keyword" style="color: #000091">public</span> <X> List wrap(X value, WrapperOptions options) {
<span class="code-keyword" style="color: #000091">if</span> ( value == <span class="code-keyword" style="color: #000091">null</span> ) {
<span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">null</span>;
}
<span class="code-keyword" style="color: #000091">if</span> ( <span class="code-object" style="color: #910091">String</span>.<span class="code-keyword" style="color: #000091">class.</span>isInstance( value ) ) {
<span class="code-keyword" style="color: #000091">return</span> convertToEntityAttribute((<span class="code-object" style="color: #910091">String</span>)value);
}
<span class="code-keyword" style="color: #000091">throw</span> unknownWrap( value.getClass() );
}
@Override
<span class="code-keyword" style="color: #000091">public</span> <X> X unwrap(List value, <span class="code-object" style="color: #910091">Class</span><X> type, WrapperOptions options) {
<span class="code-keyword" style="color: #000091">if</span> ( value == <span class="code-keyword" style="color: #000091">null</span> ) {
<span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">null</span>;
}
<span class="code-keyword" style="color: #000091">if</span> ( <span class="code-object" style="color: #910091">String</span>.<span class="code-keyword" style="color: #000091">class.</span>isAssignableFrom( type ) ) {
<span class="code-keyword" style="color: #000091">return</span> (X) convertToDatabaseColumn(value);
}
<span class="code-keyword" style="color: #000091">throw</span> unknownUnwrap( type );
}
@Override
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">String</span> extractLoggableRepresentation(List value) {
<span class="code-keyword" style="color: #000091">return</span> convertToDatabaseColumn(value);
}
@Override
<span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">int</span> extractHashCode(List value) {
<span class="code-keyword" style="color: #000091">return</span> value.hashCode();
}
}
</pre>
</div>
</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I am happy to provide more information if required. The error is in the logs, it does not appear to make any material difference to the way the code operates. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">It may well be that I have configured the annotations incorrectly but if that is the case it is not obvious what the annotations should be and the combinations I have tried either didn't work or made no difference.</p> </td>
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