/**
* 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.camel.component.cxf.util;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.apache.camel.converter.jaxp.XmlConverter;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.helpers.IOUtils;
import org.apache.cxf.io.CachedOutputStream;
import org.apache.cxf.staxutils.StaxUtils;
import org.apache.cxf.staxutils.W3CDOMStreamWriter;
public final class CxfUtils {
private CxfUtils() {
// helper class
}
public static String getStringFromInputStream(InputStream in) throws Exception {
CachedOutputStream bos = new CachedOutputStream();
IOUtils.copy(in, bos);
in.close();
bos.close();
return bos.getOut().toString();
}
public static String elementToString(Element element) throws Exception {
Map<String, String> namespaces = new HashMap<String, String>();
visitNodesForNameSpace(element, namespaces);
W3CDOMStreamWriter writer = new W3CDOMStreamWriter();
writeElement(element, writer, namespaces);
XmlConverter converter = new XmlConverter();
return converter.toString(converter.toDOMSource(writer.getDocument()), null);
}
private static void writeElement(Element e,
XMLStreamWriter writer,
Map<String, String> namespaces)
throws XMLStreamException {
String prefix = e.getPrefix();
String ns = e.getNamespaceURI();
String localName = e.getLocalName();
if (prefix == null) {
prefix = "";
}
if (localName == null) {
localName = e.getNodeName();
if (localName == null) {
throw new IllegalStateException("Element's local name cannot be null!");
}
}
String decUri = writer.getNamespaceContext().getNamespaceURI(prefix);
boolean declareNamespace = decUri == null || !decUri.equals(ns);
if (ns == null || ns.length() == 0) {
writer.writeStartElement(localName);
if (StringUtils.isEmpty(decUri)) {
declareNamespace = false;
}
} else {
writer.writeStartElement(prefix, localName, ns);
}
NamedNodeMap attrs = e.getAttributes();
for (int i = 0; i < attrs.getLength(); i++) {
Node attr = attrs.item(i);
String name = attr.getLocalName();
String attrPrefix = attr.getPrefix();
if (attrPrefix == null) {
attrPrefix = "";
}
if (name == null) {
name = attr.getNodeName();
}
if ("xmlns".equals(attrPrefix)) {
writer.writeNamespace(name, attr.getNodeValue());
if (name.equals(prefix) && attr.getNodeValue().equals(ns)) {
declareNamespace = false;
}
} else {
if ("xmlns".equals(name) && "".equals(attrPrefix)) {
writer.writeNamespace("", attr.getNodeValue());
if (attr.getNodeValue().equals(ns)) {
declareNamespace = false;
} else if (StringUtils.isEmpty(attr.getNodeValue())
&& StringUtils.isEmpty(ns)) {
declareNamespace = false;
}
} else {
String attns = attr.getNamespaceURI();
String value = attr.getNodeValue();
if (attns == null || attns.length() == 0) {
writer.writeAttribute(name, value);
} else if (attrPrefix == null || attrPrefix.length() == 0) {
writer.writeAttribute(attns, name, value);
} else {
writer.writeAttribute(attrPrefix, attns, name, value);
}
}
}
}
if (declareNamespace) {
if (ns == null) {
writer.writeNamespace(prefix, "");
} else {
writer.writeNamespace(prefix, ns);
}
}
if (namespaces != null && namespaces.size() > 0) {
for (String key : namespaces.keySet()) {
String namespaceURI = namespaces.get(key);
writer.writeNamespace(key, namespaceURI);
}
}
Node nd = e.getFirstChild();
while (nd != null) {
StaxUtils.writeNode(nd, writer, false);
nd = nd.getNextSibling();
}
writer.writeEndElement();
}
private static void visitNodesForNameSpace(Node node, Map<String, String> namespaces) {
if (node instanceof Element) {
Element element = (Element)node;
if (element.getPrefix() != null && element.getNamespaceURI() != null) {
namespaces.put(element.getPrefix(), element.getNamespaceURI());
}
if (node.getChildNodes() != null) {
NodeList nodelist = node.getChildNodes();
for (int i = 0; i < nodelist.getLength(); i++) {
visitNodesForNameSpace(nodelist.item(i), namespaces);
}
}
}
}
}