/*
* Copyright (c) 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 David Berkman
*
* This file is part of the SmallMind Code Project.
*
* The SmallMind Code Project is free software, you can redistribute
* it and/or modify it under either, at your discretion...
*
* 1) The terms of GNU Affero General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at
* your option) any later version.
*
* ...or...
*
* 2) The terms of the Apache License, Version 2.0.
*
* The SmallMind Code Project is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License or Apache License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* and the Apache License along with the SmallMind Code Project. If not, see
* <http://www.gnu.org/licenses/> or <http://www.apache.org/licenses/LICENSE-2.0>.
*
* Additional permission under the GNU Affero GPL version 3 section 7
* ------------------------------------------------------------------
* If you modify this Program, or any covered work, by linking or
* combining it with other code, such other code is not for that reason
* alone subject to any of the requirements of the GNU Affero GPL
* version 3.
*/
package org.smallmind.web.jersey.util;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.adapters.XmlAdapter;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.smallmind.nutsnbolts.reflection.AnnotationFilter;
import org.smallmind.nutsnbolts.reflection.OffloadingInvocationHandler;
import org.smallmind.nutsnbolts.reflection.PassType;
import org.smallmind.nutsnbolts.reflection.ProxyGenerator;
import org.smallmind.nutsnbolts.reflection.type.GenericUtility;
public abstract class AttributedPolymorphicXmlAdapter<T> extends XmlAdapter<ObjectNode, T> {
private Class<?> baseClass;
public AttributedPolymorphicXmlAdapter () {
baseClass = GenericUtility.getTypeArguments(AttributedPolymorphicXmlAdapter.class, this.getClass()).get(0);
}
public String getPolymorphicAttributeName () {
return "type";
}
@Override
public T unmarshal (ObjectNode objectNode) {
JsonNode polymorphicKeyNode;
if ((polymorphicKeyNode = objectNode.get(getPolymorphicAttributeName())) == null) {
throw new JAXBProcessingException("The json for the sub-class of class(%s) is improperly formatted", baseClass.getName());
} else {
Class<?> polymorphicSubClass;
String polymorphicKey;
if ((polymorphicSubClass = PolymorphicClassCache.getPolymorphicSubClass(baseClass, polymorphicKey = polymorphicKeyNode.asText())) == null) {
throw new JAXBProcessingException("Unable to map the root element name(%s) to any known sub-class of class(%s) listed in the %s annotation", polymorphicKey, baseClass.getName(), XmlPolymorphicSubClasses.class.getSimpleName());
} else {
Class<?> proxySubClass;
Object polymorphicInstance;
if ((proxySubClass = PolymorphicClassCache.getProxyClassForPolymorphicClass(polymorphicSubClass)) == null) {
Object proxyObject = ProxyGenerator.createProxy(polymorphicSubClass, null, new AnnotationFilter(PassType.EXCLUDE, XmlJavaTypeAdapter.class));
PolymorphicClassCache.addClassRelationship(polymorphicSubClass, proxySubClass = proxyObject.getClass());
}
objectNode.remove(getPolymorphicAttributeName());
try {
PolymorphicValueInstantiator.setPolymorphicInstance(polymorphicInstance = polymorphicSubClass.newInstance());
} catch (Exception exception) {
throw new JAXBProcessingException(exception);
}
JsonCodec.convert(objectNode, proxySubClass);
return (T)polymorphicInstance;
}
}
}
@Override
public ObjectNode marshal (T value)
throws JsonProcessingException {
if (value.getClass().equals(baseClass)) {
throw new JAXBProcessingException("Attempting to serialize the polymorphic root class(%s) would be infinitely recursive", baseClass.getName());
} else {
XmlRootElement xmlRootElementAnnotation;
if ((xmlRootElementAnnotation = value.getClass().getAnnotation(XmlRootElement.class)) == null) {
throw new JAXBProcessingException("The class(%s) is missing a %s annotation", value.getClass().getName(), XmlRootElement.class.getSimpleName());
} else {
ObjectNode objectNode;
Object proxyObject = ProxyGenerator.createProxy(value.getClass(), new OffloadingInvocationHandler(value), new AnnotationFilter(PassType.EXCLUDE, XmlJavaTypeAdapter.class));
PolymorphicClassCache.addClassRelationship(value.getClass(), proxyObject.getClass());
objectNode = (ObjectNode)JsonCodec.writeAsJsonNode(proxyObject);
objectNode.put(getPolymorphicAttributeName(), xmlRootElementAnnotation.name());
return objectNode;
}
}
}
}