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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">jakarta.xml.bind.annotation</a></div>
<h2 title="Annotation Type XmlID" class="title">Annotation Type XmlID</h2>
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<pre><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" class="externalLink">@Retention</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" class="externalLink">RUNTIME</a>)
<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" class="externalLink">@Target</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" class="externalLink">FIELD</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" class="externalLink">METHOD</a>})
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 {
&#64;XmlAttribute
&#64;XmlID
public String getCustomerID();
public void setCustomerID(String id);
.... other properties not shown
}
<code>
&lt;!-- Example: XML Schema fragment --&gt;
&lt;xs:complexType name="Customer"&gt;
&lt;xs:complexContent&gt;
&lt;xs:sequence&gt;
....
&lt;/xs:sequence&gt;
&lt;xs:attribute name="customerID" type="xs:ID"/&gt;
&lt;/xs:complexContent&gt;
&lt;/xs:complexType&gt;
</code></pre></div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="XmlIDREF.html" title="annotation in jakarta.xml.bind.annotation"><code>XmlIDREF</code></a></dd>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Sekhar Vajjhala, Sun Microsystems, Inc.</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.6, JAXB 2.0</dd>
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