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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.cxf.aegis.xml.jdom;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamWriter;
import org.apache.cxf.aegis.util.stax.JDOMNamespaceContext;
import org.apache.cxf.aegis.xml.AbstractMessageWriter;
import org.apache.cxf.aegis.xml.MessageWriter;
import org.jdom.Attribute;
import org.jdom.Element;
import org.jdom.Namespace;
public class JDOMWriter extends AbstractMessageWriter {
private Element element;
public JDOMWriter(Element element) {
this.element = element;
}
public void writeValue(Object value) {
// an NPE is not helpful, and code at a higher level is responsible for
// xsi:nil processing.
if (value != null) {
element.addContent(value.toString());
}
}
public void writeValue(Object value, String ns, String attr) {
String prefix = getUniquePrefix(element, ns);
element.setAttribute(new Attribute(attr, value.toString(), Namespace.getNamespace(prefix, ns)));
}
public MessageWriter getElementWriter(String name) {
return getElementWriter(name, element.getNamespaceURI());
}
public MessageWriter getElementWriter(String name, String namespace) {
String prefix = getUniquePrefix(element, namespace);
Element child = new Element(name, Namespace.getNamespace(prefix, namespace));
element.addContent(child);
return new JDOMWriter(child);
}
public MessageWriter getElementWriter(QName qname) {
return getElementWriter(qname.getLocalPart(), qname.getNamespaceURI());
}
public String getPrefixForNamespace(String namespace) {
return getUniquePrefix(element, namespace);
}
public XMLStreamWriter getXMLStreamWriter() {
throw new UnsupportedOperationException("Stream writing not supported from a W3CDOMWriter.");
}
public String getPrefixForNamespace(String namespace, String hint) {
// todo: this goes for the option of ignoring the hint - we should
// probably at least attempt to honour it
return getUniquePrefix(element, namespace);
}
public MessageWriter getAttributeWriter(String name) {
Attribute att = new Attribute(name, "", element.getNamespace());
element.setAttribute(att);
return new AttributeWriter(att);
}
public MessageWriter getAttributeWriter(String name, String namespace) {
Attribute att;
if (namespace != null && namespace.length() > 0) {
String prefix = getUniquePrefix(element, namespace);
att = new Attribute(name, "", Namespace.getNamespace(prefix, namespace));
} else {
att = new Attribute(name, "");
}
element.setAttribute(att);
return new AttributeWriter(att);
}
public MessageWriter getAttributeWriter(QName qname) {
return getAttributeWriter(qname.getLocalPart(), qname.getNamespaceURI());
}
public void close() {
}
private static String getUniquePrefix(Element el) {
int n = 1;
while (true) {
String nsPrefix = "ns" + n;
if (el.getNamespace(nsPrefix) == null) {
return nsPrefix;
}
n++;
}
}
private static String getUniquePrefix(Element element, String namespaceURI) {
String prefix = JDOMNamespaceContext.rawGetPrefix(element, namespaceURI);
// it is OK to have both namespace URI and prefix be empty.
if (prefix == null) {
if ("".equals(namespaceURI)) {
return "";
}
prefix = getUniquePrefix(element);
element.addNamespaceDeclaration(Namespace.getNamespace(prefix, namespaceURI));
}
return prefix;
}
}