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93 lines
2.5 KiB
93 lines
2.5 KiB
/*
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* Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*/
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package javax.xml.bind;
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import javax.xml.namespace.QName;
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/**
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* Provide access to JAXB xml binding data for a JAXB object.
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*
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* <p>
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* Intially, the intent of this class is to just conceptualize how
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* a JAXB application developer can access xml binding information,
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* independent if binding model is java to schema or schema to java.
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* Since accessing the XML element name related to a JAXB element is
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* a highly requested feature, demonstrate access to this
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* binding information.
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*
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* The factory method to get a <code>JAXBIntrospector</code> instance is
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* {@link JAXBContext#createJAXBIntrospector()}.
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*
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* @see JAXBContext#createJAXBIntrospector()
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* @since JAXB2.0
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*/
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public abstract class JAXBIntrospector {
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/**
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* <p>Return true if <code>object</code> represents a JAXB element.</p>
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* <p>Parameter <code>object</code> is a JAXB element for following cases:
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* <ol>
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* <li>It is an instance of <code>javax.xml.bind.JAXBElement</code>.</li>
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* <li>The class of <code>object</code> is annotated with
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* <code>@XmlRootElement</code>.
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* </li>
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* </ol>
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*
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* @see #getElementName(Object)
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*/
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public abstract boolean isElement(Object object);
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/**
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* <p>Get xml element qname for <code>jaxbElement</code>.</p>
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*
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* @param jaxbElement is an object that {@link #isElement(Object)} returned true.
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*
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* @return xml element qname associated with jaxbElement;
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* null if <code>jaxbElement</code> is not a JAXB Element.
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*/
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public abstract QName getElementName(Object jaxbElement);
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/**
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* <p>Get the element value of a JAXB element.</p>
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*
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* <p>Convenience method to abstract whether working with either
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* a javax.xml.bind.JAXBElement instance or an instance of
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* <tt>@XmlRootElement</tt> annotated Java class.</p>
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*
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* @param jaxbElement object that #isElement(Object) returns true.
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*
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* @return The element value of the <code>jaxbElement</code>.
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*/
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public static Object getValue(Object jaxbElement) {
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if (jaxbElement instanceof JAXBElement) {
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return ((JAXBElement)jaxbElement).getValue();
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} else {
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// assume that class of this instance is
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// annotated with @XmlRootElement.
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return jaxbElement;
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}
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}
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}
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