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| <h2 title="Annotation Type XmlID" class="title">Annotation Type XmlID</h2> |
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| <pre>@Retention(value=RUNTIME) |
| @Target(value={FIELD,METHOD}) |
| public @interface <span class="memberNameLabel">XmlID</span></pre> |
| <div class="block"><p> |
| Maps a JavaBean property to XML ID. |
| |
| <p> |
| To preserve referential integrity of an object graph across XML |
| serialization followed by a XML deserialization, requires an object |
| reference to be marshalled by reference or containment |
| appropriately. Annotations <code>@XmlID</code> and <code>@XmlIDREF</code> |
| together allow a customized mapping of a JavaBean property's |
| type by containment or reference. |
| |
| <p><b>Usage</b> </p> |
| The <code>@XmlID</code> annotation can be used with the following |
| program elements: |
| <ul> |
| <li> a JavaBean property </li> |
| <li> non static, non transient field </li> |
| </ul> |
| |
| <p>See "Package Specification" in jakarta.xml.bind.package javadoc for |
| additional common information.</p> |
| |
| The usage is subject to the following constraints: |
| <ul> |
| <li> At most one field or property in a class can be annotated |
| with <code>@XmlID</code>. </li> |
| <li> The JavaBean property's type must be <code>java.lang.String</code>.</li> |
| <li> The only other mapping annotations that can be used |
| with <code>@XmlID</code> |
| are: <code>@XmlElement</code> and <code>@XmlAttribute</code>.</li> |
| </ul> |
| |
| <p><b>Example</b>: Map a JavaBean property's type to <code>xs:ID</code></p> |
| <pre> |
| // Example: code fragment |
| public class Customer { |
| @XmlAttribute |
| @XmlID |
| public String getCustomerID(); |
| public void setCustomerID(String id); |
| .... other properties not shown |
| } |
| <code> |
| |
| <!-- Example: XML Schema fragment --> |
| <xs:complexType name="Customer"> |
| <xs:complexContent> |
| <xs:sequence> |
| .... |
| </xs:sequence> |
| <xs:attribute name="customerID" type="xs:ID"/> |
| </xs:complexContent> |
| </xs:complexType> |
| </code></pre></div> |
| <dl> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>1.6, JAXB 2.0</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../jakarta/xml/bind/annotation/XmlIDREF.html" title="annotation in jakarta.xml.bind.annotation"><code>XmlIDREF</code></a></dd> |
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