/*******************************************************************************
* Copyright (c) 1998, 2009 Oracle. 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.oxm.XMLContext;
import org.eclipse.persistence.oxm.XMLDescriptor;
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 peices 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;
}
XMLDescriptor descriptor = (XMLDescriptor)session.getDescriptor(obj);
if(descriptor == null) {
return false;
}
return descriptor.getDefaultRootElement().length() != 0;
} catch(XMLMarshalException e) {
return false;
}
}
public QName getElementName(Object obj) {
if(!isElement(obj)) {
return null;
}
if(obj instanceof JAXBElement) {
return ((JAXBElement) obj).getName();
}
try {
XMLDescriptor descriptor = (XMLDescriptor)context.getSession(obj).getDescriptor(obj);
String rootElem = descriptor.getDefaultRootElement();
int prefixIndex = rootElem.indexOf(":");
if(prefixIndex == -1) {
return new QName(rootElem);
} else {
String prefix = rootElem.substring(0, prefixIndex);
String localPart = rootElem.substring(prefixIndex + 1);
String URI = descriptor.getNamespaceResolver().resolveNamespacePrefix(prefix);
return new QName(URI, localPart);
}
} catch(XMLMarshalException e) {
return null;
}
}
}