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/*
* 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 static org.apache.tuscany.sca.databinding.jaxb.JAXBContextHelper.getValueType;
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.common.xml.dom.DOMHelper;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.databinding.BaseDataBinding;
import org.apache.tuscany.sca.databinding.WrapperHandler;
import org.apache.tuscany.sca.databinding.XMLTypeHelper;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.impl.DataTypeImpl;
import org.apache.tuscany.sca.interfacedef.util.XMLType;
import org.w3c.dom.Document;
/**
* JAXB DataBinding
*
* @version $Rev$ $Date$
*/
public class JAXBDataBinding extends BaseDataBinding {
public static final String NAME = JAXBElement.class.getName();
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");
private JAXBWrapperHandler wrapperHandler;
private JAXBTypeHelper xmlTypeHelper;
private DOMHelper domHelper;
private JAXBContextHelper contextHelper;
public JAXBDataBinding(ExtensionPointRegistry registry) {
super(NAME, JAXBElement.class);
this.wrapperHandler = new JAXBWrapperHandler();
this.xmlTypeHelper = new JAXBTypeHelper(registry);
this.domHelper = DOMHelper.getInstance(registry);
contextHelper = JAXBContextHelper.getInstance(registry);
}
@Override
public boolean introspect(DataType dataType, Operation operation) {
Class javaType = dataType.getPhysical();
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(NAME);
return true;
}
}
}
if (dataType.getLogical() == null) {
dataType.setLogical(XMLType.UNKNOWN);
}
dataType.setDataBinding(NAME);
return true;
}
XMLType xmlType = JAXBContextHelper.getXmlTypeName(javaType);
if (xmlType == null) {
return false;
}
// If DataType is already an XMLType it might have an element name that we wish to preserve
// but check that we're not overwriting the UNKNOWN type
Object logical = dataType.getLogical();
if (logical instanceof XMLType &&
logical != XMLType.UNKNOWN) {
((XMLType)logical).setTypeName(xmlType.getTypeName());
} else {
dataType.setLogical(xmlType);
}
dataType.setDataBinding(NAME);
return true;
}
@SuppressWarnings("unchecked")
@Override
public Object copy(Object arg,
DataType sourceDataType,
DataType targetDataType,
Operation sourceOperation,
Operation targetOperation) {
try {
boolean isElement = false;
if (sourceDataType == null) {
Class cls = arg.getClass();
if (arg instanceof JAXBElement) {
isElement = true;
cls = ((JAXBElement)arg).getDeclaredType();
}
sourceDataType = new DataTypeImpl<XMLType>(NAME, cls, XMLType.UNKNOWN);
}
JAXBContext context = contextHelper.createJAXBContext(sourceDataType);
arg = JAXBContextHelper.createJAXBElement(context, sourceDataType, arg);
Document doc = domHelper.newDocument();
context.createMarshaller().marshal(arg, doc);
Object value;
if (targetDataType != null && targetDataType.getPhysical() != sourceDataType.getPhysical()) {
JAXBContext targetContext = contextHelper.createJAXBContext(targetDataType);
value = targetContext.createUnmarshaller().unmarshal(doc, getValueType(targetDataType.getPhysical()));
} else {
value = context.createUnmarshaller().unmarshal(doc, getValueType(sourceDataType.getPhysical()));
}
if (isElement && value instanceof JAXBElement) {
return value;
}
return JAXBContextHelper.createReturnValue(context, sourceDataType, value);
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
}
@Override
public WrapperHandler getWrapperHandler() {
return wrapperHandler;
}
@Override
public XMLTypeHelper getXMLTypeHelper() {
// return new JAXBTypeHelper();
return xmlTypeHelper;
}
}
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