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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.xml;
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.TransformationContext;
import org.apache.tuscany.sca.databinding.WrapperHandler;
import org.apache.tuscany.sca.interfacedef.DataType;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.util.XMLType;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
/**
* DOM DataBinding
*
* @version $Rev$ $Date$
* @tuscany.spi.extension.asclient
*/
public class DOMDataBinding extends BaseDataBinding {
public static final String NAME = Node.class.getName();
public static final String ROOT_NAMESPACE = "http://tuscany.apache.org/xmlns/sca/databinding/dom/1.0";
public static final QName ROOT_ELEMENT = new QName(ROOT_NAMESPACE, "root");
private DOMHelper domHelper;
public DOMDataBinding(ExtensionPointRegistry registry) {
super(NAME, Node.class);
this.domHelper = DOMHelper.getInstance(registry);
}
@Override
public WrapperHandler getWrapperHandler() {
return new DOMWrapperHandler(domHelper);
}
@Override
public Object copy(Object source,
DataType dataType,
DataType targetDataType,
Operation operation,
Operation targetOperation) {
if (Node.class.isAssignableFrom(source.getClass())) {
Node nodeSource = (Node)source;
return nodeSource.cloneNode(true);
}
return super.copy(source, dataType, targetDataType, operation, targetOperation);
}
@Override
public boolean introspect(DataType type, Operation operation) {
if (Node.class.isAssignableFrom(type.getPhysical())) {
if (type.getLogical() == null) {
type.setLogical(new XMLType(ROOT_ELEMENT, null));
}
type.setDataBinding(NAME);
return true;
}
return false;
}
/**
* @param context
* @param element
*/
public static Element adjustElementName(TransformationContext context, Element element) {
if (context != null) {
DataType dataType = context.getTargetDataType();
Object logical = dataType == null ? null : dataType.getLogical();
if (!(logical instanceof XMLType)) {
return element;
}
XMLType xmlType = (XMLType)logical;
QName name = new QName(element.getNamespaceURI(), element.getLocalName());
if (xmlType.isElement() && !xmlType.getElementName().equals(name)) {
QName newName = xmlType.getElementName();
String prefix = newName.getPrefix();
String qname = newName.getLocalPart();
if (prefix != null && !prefix.equals("")) {
qname = prefix + ":" + qname;
}
Document doc = element.getOwnerDocument();
Element newElement = doc.createElementNS(newName.getNamespaceURI(), qname);
// Copy the attributes to the new element
NamedNodeMap attrs = element.getAttributes();
for (int i = 0; i < attrs.getLength(); i++) {
Attr attr = (Attr)doc.importNode(attrs.item(i), true);
newElement.getAttributes().setNamedItem(attr);
}
// Move all the children
while (element.hasChildNodes()) {
newElement.appendChild(element.getFirstChild());
}
// Replace the old node with the new node
if (element.getParentNode() != null) {
element.getParentNode().replaceChild(newElement, element);
}
return newElement;
}
}
return element;
}
}
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