/******************************************************************************* | |
* Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved. | |
* This program and the accompanying materials are made available under the | |
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.jaxb; | |
import javax.xml.bind.JAXBElement; | |
import javax.xml.namespace.QName; | |
import org.eclipse.persistence.exceptions.XMLMarshalException; | |
import org.eclipse.persistence.internal.oxm.XPathFragment; | |
import org.eclipse.persistence.internal.oxm.mappings.Descriptor; | |
import org.eclipse.persistence.oxm.XMLContext; | |
import org.eclipse.persistence.sessions.Session; | |
/** | |
* INTERNAL | |
* <p><b>Purpose:</b>Provide a TopLink implementation of JAXBIntrospector | |
* <p><b>Responsibilities:</b><ul> | |
* <li>Determine if a an object has an associated Global Element</li> | |
* <li>Get an element QName for an object that has an associated global element</li> | |
* </ul> | |
* <p>This class is the TopLink implementation of JAXBIntrospector. An Introspector is created | |
* by a JAXBContext and allows the user to access certain pieces of meta-data about an instance | |
* of a JAXB bound class. | |
* | |
* @see javax.xml.bind.JAXBIntrospector | |
* @see org.eclipse.persistence.jaxb.JAXB20Context | |
* @author mmacivor | |
* @since Oracle TopLink 11.1.1.0.0 | |
*/ | |
public class JAXBIntrospector extends javax.xml.bind.JAXBIntrospector { | |
private XMLContext context; | |
public JAXBIntrospector(XMLContext context) { | |
this.context = context; | |
} | |
public boolean isElement(Object obj) { | |
if (obj instanceof JAXBElement) { | |
return true; | |
} | |
try { | |
Session session = context.getSession(obj); | |
if(session == null) { | |
return false; | |
} | |
Descriptor descriptor = (Descriptor)session.getDescriptor(obj); | |
if(descriptor == null) { | |
return false; | |
} | |
return descriptor.getDefaultRootElementField() != null; | |
} catch(XMLMarshalException e) { | |
return false; | |
} | |
} | |
public QName getElementName(Object obj) { | |
if(!isElement(obj)) { | |
return null; | |
} | |
if(obj instanceof JAXBElement) { | |
return ((JAXBElement) obj).getName(); | |
} | |
try { | |
Descriptor descriptor = (Descriptor)context.getSession(obj).getDescriptor(obj); | |
XPathFragment rootFragment = descriptor.getDefaultRootElementField().getXPathFragment(); | |
return new QName(rootFragment.getNamespaceURI(), rootFragment.getLocalName()); | |
} catch(XMLMarshalException e) { | |
return null; | |
} | |
} | |
} |