JAXB API Source Code

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

jaxb-api-2.3.1.jar is the JAR file for the JAXB API 2.3 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:

✍: FYIcenter.com

javax/xml/bind/JAXBIntrospector.java

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package javax.xml.bind;
import  javax.xml.namespace.QName;

/**
 * Provide access to JAXB xml binding data for a JAXB object.
 *
 * <p>
 * Intially, the intent of this class is to just conceptualize how 
 * a JAXB application developer can access xml binding information, 
 * independent if binding model is java to schema or schema to java.
 * Since accessing the XML element name related to a JAXB element is
 * a highly requested feature, demonstrate access to this
 * binding information.
 *
 * The factory method to get a <code>JAXBIntrospector</code> instance is 
 * {@link JAXBContext#createJAXBIntrospector()}.
 *
 * @see JAXBContext#createJAXBIntrospector()
 * @since 1.6, JAXB 2.0
 */
public abstract class JAXBIntrospector {

    /** 
     * <p>Return true if <code>object</code> represents a JAXB element.</p>
     * <p>Parameter <code>object</code> is a JAXB element for following cases:
     * <ol>
     *   <li>It is an instance of <code>javax.xml.bind.JAXBElement</code>.</li>
     *   <li>The class of <code>object</code> is annotated with 
     *       <code>&#64;XmlRootElement</code>.
     *   </li>
     * </ol>
     *
     * @see #getElementName(Object)
     */
    public abstract boolean isElement(Object object);

    /**
     * <p>Get xml element qname for <code>jaxbElement</code>.</p>
     *
     * @param jaxbElement is an object that {@link #isElement(Object)} returned true.
     *                    
     * @return xml element qname associated with jaxbElement;
     *         null if <code>jaxbElement</code> is not a JAXB Element.
     */
    public abstract QName getElementName(Object jaxbElement);

    /**
     * <p>Get the element value of a JAXB element.</p>
     *
     * <p>Convenience method to abstract whether working with either 
     *    a javax.xml.bind.JAXBElement instance or an instance of 
     *    {@code @XmlRootElement} annotated Java class.</p>
     *
     * @param jaxbElement  object that #isElement(Object) returns true.
     *
     * @return The element value of the <code>jaxbElement</code>.
     */
    public static Object getValue(Object jaxbElement) {
	if (jaxbElement instanceof JAXBElement) {
	    return ((JAXBElement)jaxbElement).getValue();
	} else {
	    // assume that class of this instance is 
	    // annotated with @XmlRootElement.
	    return jaxbElement;
	}
    }
}

javax/xml/bind/JAXBIntrospector.java

 

⇒ Download JAXB 2.2 Specification and API JAR

⇐ Download JAXB 2.3 Specification and API JAR

⇑ JAXB (Java Architecture for XML Binding) API Specification

⇑⇑ FAQ for jaxb-*.jar - Java Architecture for XML Binding

2018-06-06, 13782👍, 0💬