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| <div class="subTitle">org.eclipse.persistence.annotations</div> |
| <h2 title="Annotation Type ReadTransformer" class="title">Annotation Type ReadTransformer</h2> |
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| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Target.html?is-external=true" title="class or interface in java.lang.annotation">@Target</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Target.html?is-external=true#value--" title="class or interface in java.lang.annotation">value</a>={<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/ElementType.html?is-external=true#METHOD" title="class or interface in java.lang.annotation">METHOD</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/ElementType.html?is-external=true#FIELD" title="class or interface in java.lang.annotation">FIELD</a>}) |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Retention.html?is-external=true" title="class or interface in java.lang.annotation">@Retention</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Retention.html?is-external=true#value--" title="class or interface in java.lang.annotation">value</a>=<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/RetentionPolicy.html?is-external=true#RUNTIME" title="class or interface in java.lang.annotation">RUNTIME</a>) |
| public @interface <span class="memberNameLabel">ReadTransformer</span></pre> |
| <div class="block">Annotation for org.eclipse.persistence.mappings.TransformationMapping. |
| Unless the TransformationMapping is write-only, it should have a |
| ReadTransformer, it defines transformation of database column(s) value(s) |
| into attribute value. |
| |
| Also unless it's a read-only mapping, either WriteTransformer annotation or |
| WriteTransformers annotation should be specified. Each WriteTransformer |
| defines transformation of the attribute value to a single database column |
| value (column is specified in the WriteTransformer).</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../org/eclipse/persistence/annotations/Transformation.html" title="annotation in org.eclipse.persistence.annotations"><code>Transformation</code></a>, |
| <a href="../../../../org/eclipse/persistence/annotations/WriteTransformer.html" title="annotation in org.eclipse.persistence.annotations"><code>WriteTransformer</code></a>, |
| <a href="../../../../org/eclipse/persistence/annotations/WriteTransformers.html" title="annotation in org.eclipse.persistence.annotations"><code>Transformation can be specified within an Entity, MappedSuperclass |
| and Embeddable class.</code></a></dd> |
| <dt><span class="simpleTagLabel">Author:</span></dt> |
| <dd>Andrei Ilitchev</dd> |
| </dl> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- =========== ANNOTATION TYPE OPTIONAL MEMBER SUMMARY =========== --> |
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| <li class="blockList"><a name="annotation.type.optional.element.summary"> |
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| <h3>Optional Element Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Optional Element Summary table, listing optional elements, and an explanation"> |
| <caption><span>Optional Elements</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Optional Element and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/annotations/ReadTransformer.html#method--">method</a></span></code> |
| <div class="block">The mapped class must have a method with this name which returns a value |
| to be assigned to the attribute (not assigns the value to the attribute).</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/annotations/ReadTransformer.html#transformerClass--">transformerClass</a></span></code> |
| <div class="block">User-defined class that must implement the |
| org.eclipse.persistence.mappings.transformers.AttributeTransformer |
| interface.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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| <!-- ============ ANNOTATION TYPE MEMBER DETAIL =========== --> |
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| <h3>Element Detail</h3> |
| <a name="transformerClass--"> |
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| <h4>transformerClass</h4> |
| <pre>public abstract <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a> transformerClass</pre> |
| <div class="block">User-defined class that must implement the |
| org.eclipse.persistence.mappings.transformers.AttributeTransformer |
| interface. The class will be instantiated, its buildAttributeValue will |
| be used to create the value to be assigned to the attribute. |
| Either transformerClass or method must be specified, but not both.</div> |
| <dl> |
| <dt>Default:</dt> |
| <dd>void.class</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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| <h4>method</h4> |
| <pre>public abstract <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> method</pre> |
| <div class="block">The mapped class must have a method with this name which returns a value |
| to be assigned to the attribute (not assigns the value to the attribute). |
| Either transformerClass or method must be specified, but not both.</div> |
| <dl> |
| <dt>Default:</dt> |
| <dd>""</dd> |
| </dl> |
| </li> |
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