/*
* 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.adapters.XmlJavaTypeAdapter;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.StdValueInstantiator;
import org.smallmind.nutsnbolts.reflection.AnnotationFilter;
import org.smallmind.nutsnbolts.reflection.OffloadingInvocationHandler;
import org.smallmind.nutsnbolts.reflection.PassType;
import org.smallmind.nutsnbolts.reflection.ProxyGenerator;
public class PolymorphicValueInstantiator extends StdValueInstantiator {
private static final ThreadLocal<Object> polymorphicInstanceThreadLocal = new ThreadLocal<>();
private Class<?> polymorphicSubClass;
public PolymorphicValueInstantiator (StdValueInstantiator src, Class<?> polymorphicSubClass) {
super(src);
this.polymorphicSubClass = polymorphicSubClass;
}
public static void setPolymorphicInstance (Object obj) {
polymorphicInstanceThreadLocal.set(obj);
}
@Override
public boolean canCreateUsingDefault () {
return true;
}
@Override
public Object createUsingDefault (DeserializationContext ctxt) {
Object polymorphicInstance;
if ((polymorphicInstance = polymorphicInstanceThreadLocal.get()) == null) {
throw new JAXBProcessingException("Can not update a 'null' instance of the polymorphic sub-class(%s)", polymorphicSubClass.getName());
} else {
try {
return ProxyGenerator.createProxy(polymorphicSubClass, new OffloadingInvocationHandler(polymorphicInstance), new AnnotationFilter(PassType.EXCLUDE, XmlJavaTypeAdapter.class));
} finally {
polymorphicInstanceThreadLocal.remove();
}
}
}
}