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/**
*
* Copyright 2005 The Apache Software Foundation
*
* Licensed 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.sdo.helper;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import javax.xml.namespace.QName;
import org.osoa.sdo.DataObject;
import org.osoa.sdo.Property;
import org.osoa.sdo.Type;
import org.osoa.sdo.helper.DataFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* @version $Rev$ $Date$
*/
public class DOMHelperImpl {
private final DataFactory dataFactory;
public DOMHelperImpl(DataFactory dataFactory) {
this.dataFactory = dataFactory;
}
public DataObject<?> load(Document doc) {
Element rootElement = doc.getDocumentElement();
QName name = new QName(rootElement.getNamespaceURI(), rootElement.getLocalName());
DataObject<?> rootObject = dataFactory.create(name);
for (Node node = rootElement.getFirstChild() ; node != null; node = node.getNextSibling()) {
if (node.getNodeType() != Node.ELEMENT_NODE) {
continue;
}
String propName = node.getLocalName();
String value = node.getTextContent();
Property<?> prop = rootObject.getType().getProperty(propName);
rootObject.setString(prop.getIndex(), value);
}
return rootObject;
}
public void save(DataObject<?> dataObject, Document doc) {
Type<?> t = dataObject.getType();
Element element = doc.createElementNS(t.getName().getNamespaceURI(), t.getName().getLocalPart());
int i = 0;
for (Property<?> property : dataObject.getType().getProperties()) {
String value = dataObject.getString(i++);
if (value != null) {
Element propElement = doc.createElementNS(null, property.getName());
if (property.getType().isDataType()) {
propElement.appendChild(doc.createTextNode(value));
}
element.appendChild(propElement);
}
}
doc.appendChild(element);
}
public void writeTo(OutputStream os, Document doc) throws IOException {
PrintWriter writer = new PrintWriter(os);
writeTo(writer, doc.getDocumentElement());
writer.flush();
}
private static void writeTo(PrintWriter writer, Element e) throws IOException {
writer.append('<');
writer.append(e.getLocalName());
if (e.hasChildNodes()) {
writer.append('>');
for (Node node = e.getFirstChild(); node != null; node = node.getNextSibling()) {
switch (node.getNodeType()) {
case Node.TEXT_NODE:
writer.append(node.getTextContent());
break;
case Node.ELEMENT_NODE:
writeTo(writer, (Element) node);
break;
}
}
writer.append('<');
writer.append('/');
writer.append(e.getLocalName());
writer.append('>');
} else {
writer.append("/>");
}
}
}
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