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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.core.loader;
import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
/**
* @version $Rev$ $Date$
*/
public final class PropertyUtils {
private PropertyUtils() {
}
public static Document createPropertyValue(XMLStreamReader reader, QName type, DocumentBuilder builder)
throws XMLStreamException {
Document doc = builder.newDocument();
// root element has no namespace and local name "value"
Element root = doc.createElementNS(null, "value");
if (type != null) {
Attr xsi = doc.createAttributeNS(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, "xmlns:xsi");
xsi.setValue(XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI);
root.setAttributeNodeNS(xsi);
String prefix = type.getPrefix();
if (prefix == null || prefix.length() == 0) {
prefix = "ns";
}
Attr typeXmlns = doc.createAttributeNS(XMLConstants.XMLNS_ATTRIBUTE_NS_URI, "xmlns:" + prefix);
typeXmlns.setValue(type.getNamespaceURI());
root.setAttributeNodeNS(typeXmlns);
Attr xsiType = doc.createAttributeNS(XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI, "xsi:type");
xsiType.setValue(prefix + ":" + type.getLocalPart());
root.setAttributeNodeNS(xsiType);
}
doc.appendChild(root);
loadPropertyValue(reader, root);
return doc;
}
/**
* Load a property value specification from an StAX stream into a DOM Document. Only elements, text and attributes
* are processed; all comments and other whitespace are ignored.
*
* @param reader the stream to read from
* @param root the DOM node to load
* @throws javax.xml.stream.XMLStreamException
*
*/
public static void loadPropertyValue(XMLStreamReader reader, Node root) throws XMLStreamException {
Document document = root.getOwnerDocument();
Node current = root;
while (true) {
switch (reader.next()) {
case XMLStreamConstants.START_ELEMENT:
QName name = reader.getName();
Element child = document.createElementNS(name.getNamespaceURI(), name.getLocalPart());
// add the attributes for this element
int count = reader.getAttributeCount();
for (int i = 0; i < count; i++) {
String ns = reader.getAttributeNamespace(i);
String localPart = reader.getAttributeLocalName(i);
String value = reader.getAttributeValue(i);
child.setAttributeNS(ns, localPart, value);
}
// push the new element and make it the current one
current.appendChild(child);
current = child;
break;
case XMLStreamConstants.CDATA:
current.appendChild(document.createCDATASection(reader.getText()));
break;
case XMLStreamConstants.CHARACTERS:
current.appendChild(document.createTextNode(reader.getText()));
break;
case XMLStreamConstants.END_ELEMENT:
// if we are back at the root then we are done
if (current == root) {
return;
}
// pop the element off the stack
current = current.getParentNode();
}
}
}
}
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