org.eclipse.persistence.sessions.serializers.XMLSerializer Maven / Gradle / Ivy
/*
* Copyright (c) 1998, 2022 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 v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial impl
package org.eclipse.persistence.sessions.serializers;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Map;
import jakarta.xml.bind.JAXBContext;
import jakarta.xml.bind.JAXBException;
import jakarta.xml.bind.Marshaller;
import jakarta.xml.bind.Unmarshaller;
import org.eclipse.persistence.internal.security.PrivilegedAccessHelper;
import org.eclipse.persistence.sessions.Session;
/**
* Uses JAXB (MOXy runtime) to convert an object to XML.
* @author James Sutherland
*/
public class XMLSerializer extends AbstractSerializer {
private static final Map XML_FACTORY_OPTS = Map.of(JAXBContext.JAXB_CONTEXT_FACTORY, "org.eclipse.persistence.jaxb.XMLBindingContextFactory");
JAXBContext context;
public XMLSerializer() {
}
public XMLSerializer(String packageName) {
try {
this.context = JAXBContext.newInstance(packageName,
PrivilegedAccessHelper.callDoPrivileged(() -> Thread.currentThread().getContextClassLoader()),
XML_FACTORY_OPTS);
} catch (JAXBException exception) {
throw new RuntimeException(exception);
}
}
public XMLSerializer(JAXBContext context) {
this.context = context;
}
@Override
public void initialize(Class serializeClass, String serializePackage, Session session) {
if (this.context == null) {
if (serializePackage == null) {
serializePackage = serializeClass.getPackage().getName();
}
try {
this.context = JAXBContext.newInstance(serializePackage, serializeClass.getClassLoader(), XML_FACTORY_OPTS);
} catch (JAXBException exception) {
throw new RuntimeException(exception);
}
}
}
@Override
public Object serialize(Object object, Session session) {
try {
Marshaller marshaller = this.context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
StringWriter writer = new StringWriter();
marshaller.marshal(object, writer);
return writer.toString();
} catch (JAXBException exception) {
throw new RuntimeException(exception);
}
}
@Override
public Object deserialize(Object xml, Session session) {
try {
Unmarshaller unmarshaller = this.context.createUnmarshaller();
StringReader reader = new StringReader((String)xml);
return unmarshaller.unmarshal(reader);
} catch (JAXBException exception) {
throw new RuntimeException(exception);
}
}
@Override
public Class getType() {
return String.class;
}
@Override
public String toString() {
return getClass().getSimpleName();
}
}