Java Architecture for XML Binding (JAXB) is a Java API that allows Java developers to map Java classes to XML representations.

jaxb-api-2.2.12.jar is the JAR file for the JAXB API 2.2 specification. You can download and use it directly without any building process as shown in the last tutorial.

If you want to rebuild the JAR file, you can download the source code at JAXB API Maven Website.

You can also browse the source code below:

⏎ javax/xml/bind/annotation/XmlElement.java

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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * http://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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package javax.xml.bind.annotation;

import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.RetentionPolicy.*;

/**
 * Maps a JavaBean property to a XML element derived from property name.
 *
 * <p> <b>Usage</b> </p>
 * <p>
 * <tt>@XmlElement</tt> annotation can be used with the following program
 * elements: 
 * <ul> 
 *   <li> a JavaBean property </li>
 *   <li> non static, non transient field </li>
 *   <li> within {@link XmlElements}
 * <p>
 *
 * </ul>
 * 
 * The usage is subject to the following constraints:
 * <ul> 
 *   <li> This annotation can be used with following annotations:
 *            {@link XmlID}, 
 *            {@link XmlIDREF},
 *            {@link XmlList},
 *            {@link XmlSchemaType},
 *            {@link XmlValue},
 *            {@link XmlAttachmentRef},
 *            {@link XmlMimeType},
 *            {@link XmlInlineBinaryData},
 *            {@link XmlElementWrapper},
 *            {@link XmlJavaTypeAdapter}</li>
 *   <li> if the type of JavaBean property is a collection type of
 *        array, an indexed property, or a parameterized list, and
 *        this annotation is used with {@link XmlElements} then,
 *        <tt>@XmlElement.type()</tt> must be DEFAULT.class since the
 *        collection item type is already known. </li>
 * </ul>
 *
 * <p>
 * A JavaBean property, when annotated with @XmlElement annotation
 * is mapped to a local element in the XML Schema complex type to
 * which the containing class is mapped.
 *
 * <p>
 * <b>Example 1: </b> Map a public non static non final field to local
 * element
 * <pre>
 *     //Example: Code fragment
 *     public class USPrice {
 *         &#64;XmlElement(name="itemprice")
 *         public java.math.BigDecimal price;
 *     }
 *
 *     &lt;!-- Example: Local XML Schema element --&gt;
 *     &lt;xs:complexType name="USPrice"/&gt;
 *       &lt;xs:sequence&gt;
 *         &lt;xs:element name="itemprice" type="xs:decimal" minOccurs="0"/&gt;
 *       &lt;/sequence&gt;
 *     &lt;/xs:complexType&gt;
 *   </pre>
 * <p>
 *
 * <b> Example 2: </b> Map a field to a nillable element.
 *   <pre>
 *
 *     //Example: Code fragment
 *     public class USPrice {
 *         &#64;XmlElement(nillable=true)
 *         public java.math.BigDecimal price;
 *     }
 *
 *     &lt;!-- Example: Local XML Schema element --&gt;
 *     &lt;xs:complexType name="USPrice"&gt;
 *       &lt;xs:sequence&gt;
 *         &lt;xs:element name="price" type="xs:decimal" nillable="true" minOccurs="0"/&gt;
 *       &lt;/sequence&gt;
 *     &lt;/xs:complexType&gt;
 *   </pre>
 * <p>
 * <b> Example 3: </b> Map a field to a nillable, required element.
 *   <pre>
 *
 *     //Example: Code fragment
 *     public class USPrice {
 *         &#64;XmlElement(nillable=true, required=true)
 *         public java.math.BigDecimal price;
 *     }
 *
 *     &lt;!-- Example: Local XML Schema element --&gt;
 *     &lt;xs:complexType name="USPrice"&gt;
 *       &lt;xs:sequence&gt;
 *         &lt;xs:element name="price" type="xs:decimal" nillable="true" minOccurs="1"/&gt;
 *       &lt;/sequence&gt;
 *     &lt;/xs:complexType&gt;
 *   </pre>
 *
 * <p> <b>Example 4: </b>Map a JavaBean property to an XML element
 * with anonymous type.</p>
 * <p>
 * See Example 6 in @{@link XmlType}.
 *
 * <p>
 * @author Sekhar Vajjhala, Sun Microsystems, Inc.
 * @since 1.6, JAXB 2.0
 */

@Retention(RUNTIME) @Target({FIELD, METHOD, PARAMETER})
public @interface XmlElement {
    /**
     * Name of the XML Schema element.
     * <p> If the value is "##default", then element name is derived from the
     * JavaBean property name. 
     */
    String name() default "##default";
 
    /**
     * Customize the element declaration to be nillable. 
     * <p>If nillable() is true, then the JavaBean property is
     * mapped to a XML Schema nillable element declaration. 
     */
    boolean nillable() default false;

    /**
     * Customize the element declaration to be required.
     * <p>If required() is true, then Javabean property is mapped to
     * an XML schema element declaration with minOccurs="1". 
     * maxOccurs is "1" for a single valued property and "unbounded"
     * for a multivalued property.
     * <p>If required() is false, then the Javabean property is mapped
     * to XML Schema element declaration with minOccurs="0".
     * maxOccurs is "1" for a single valued property and "unbounded"
     * for a multivalued property.
     */

    boolean required() default false;

    /**
     * XML target namespace of the XML Schema element.
     * <p>
     * If the value is "##default", then the namespace is determined
     * as follows:
     * <ol>
     *  <li>
     *  If the enclosing package has {@link XmlSchema} annotation,
     *  and its {@link XmlSchema#elementFormDefault() elementFormDefault}
     *  is {@link XmlNsForm#QUALIFIED QUALIFIED}, then the namespace of
     *  the enclosing class.
     *
     *  <li>
     *  Otherwise &#39;&#39; (which produces unqualified element in the default
     *  namespace.
     * </ol>
     */
    String namespace() default "##default";

    /**
     * Default value of this element.
     *
     * <p>
     * The <pre>'\u0000'</pre> value specified as a default of this annotation element
     * is used as a poor-man's substitute for null to allow implementations
     * to recognize the 'no default value' state.  
     */
    String defaultValue() default "\u0000";

    /**
     * The Java class being referenced.
     */
    Class type() default DEFAULT.class;

    /**
     * Used in {@link XmlElement#type()} to
     * signal that the type be inferred from the signature
     * of the property.
     */
    static final class DEFAULT {}
}

⏎ javax/xml/bind/annotation/XmlElement.java

Or download all of them as a single archive file:

File name: jaxb-api-2.2.12-sources.jar
File size: 245023 bytes
Release date: 2014-10-10
Download 

⇒ Download jaxb-api-2.2.12.jar File

⇐ Download JAXB 2.2 Specification and API JAR

⇑ JAXB (Java Architecture for XML Binding) API Specification

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