/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.tuscany.sca.databinding.jaxb;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.namespace.QName;
import org.apache.tuscany.sca.databinding.ExceptionHandler;
import org.apache.tuscany.sca.databinding.impl.BaseDataBinding;
import org.apache.tuscany.sca.databinding.impl.DOMHelper;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.util.XMLType;
import org.w3c.dom.Document;
/**
* JAXB DataBinding
*/
public class JAXBDataBinding extends BaseDataBinding {
public static final String NAME = JAXBElement.class.getName();
public static final String[] ALIASES = new String[] {"jaxb"};
public static final String ROOT_NAMESPACE = "http://tuscany.apache.org/xmlns/sca/databinding/jaxb/1.0";
public static final QName ROOT_ELEMENT = new QName(ROOT_NAMESPACE, "root");
public JAXBDataBinding() {
super(NAME, ALIASES, JAXBElement.class);
}
@Override
public boolean introspect(DataType dataType, Annotation[] annotations) {
Object physical = dataType.getPhysical();
if (!(physical instanceof Class)) {
return false;
}
Class javaType = (Class)physical;
if (JAXBElement.class.isAssignableFrom(javaType)) {
Type type = javaType.getGenericSuperclass();
if (type instanceof ParameterizedType) {
ParameterizedType parameterizedType = ((ParameterizedType)type);
Type rawType = parameterizedType.getRawType();
if (rawType == JAXBElement.class) {
Type actualType = parameterizedType.getActualTypeArguments()[0];
if (actualType instanceof Class) {
XMLType xmlType = JAXBContextHelper.getXmlTypeName((Class)actualType);
dataType.setLogical(xmlType);
dataType.setDataBinding(getName());
return true;
}
}
}
if (dataType.getLogical() == null) {
dataType.setLogical(XMLType.UNKNOWN);
}
dataType.setDataBinding(getName());
return true;
}
XMLType xmlType = JAXBContextHelper.getXmlTypeName(javaType);
if (xmlType == null) {
return false;
}
dataType.setLogical(xmlType);
dataType.setDataBinding(getName());
return true;
}
@SuppressWarnings("unchecked")
@Override
public Object copy(Object arg) {
try {
boolean isElement = false;
Class cls = arg.getClass();
if (arg instanceof JAXBElement) {
isElement = true;
cls = ((JAXBElement)arg).getDeclaredType();
} else {
arg = new JAXBElement(ROOT_ELEMENT, Object.class, arg);
}
JAXBContext context = JAXBContext.newInstance(cls);
Document doc = DOMHelper.newDocument();
context.createMarshaller().marshal(arg, doc);
JAXBElement<?> element = context.createUnmarshaller().unmarshal(doc, cls);
return isElement ? element : element.getValue();
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
}
@Override
public ExceptionHandler getExceptionHandler() {
return new JAXBExceptionHandler();
}
}