/*
* JBoss, Home of Professional Open Source.
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.soa.bpel.console.json;
import org.codehaus.jettison.mapped.MappedNamespaceConvention;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.ContentHandler;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXResult;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
public class XmlToJson
{
public static String parse(InputStream in)
{
try {
DocumentBuilder builder =
DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(in);
Element root = doc.getDocumentElement();
normalize(root);
ByteArrayOutputStream bout = new ByteArrayOutputStream();
Writer writer = new PrintWriter(bout);
MappedNamespaceConvention con = new MappedNamespaceConvention();
XMLStreamWriter streamWriter = new ResultAdapter(con, writer);
Source source = new DOMSource(root);
//Result output = new StAXResult(streamWriter); JDK 6 only
Result output = new SAXResult((ContentHandler)streamWriter);
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.transform(source, output);
streamWriter.flush();
writer.flush();
return new String(bout.toByteArray());
}
catch (Exception e)
{
throw new RuntimeException("XMLToJson failed", e);
}
}
private static void normalize(Node root)
{
NodeList childNodes = root.getChildNodes();
List<Node> tobeRemoved = new ArrayList<Node>();
for(int i=0; i<childNodes.getLength(); i++)
{
Node node = childNodes.item(i);
short type = node.getNodeType();
if(Node.ELEMENT_NODE == type)
normalize(node);
else if(Node.TEXT_NODE == type)
{
if(childNodes.getLength()>1) // mixed content
tobeRemoved.add(node);
}
}
for(Node n : tobeRemoved)
root.removeChild(n);
}
public static void main(String[] args)
{
String xml = "<message>\n" +
" <ID>\n" +
" <id>1</id>\n" +
" </ID>\n" +
" <Message>Hello World</Message>\n" +
"</message>";
System.out.println( XmlToJson.parse(new ByteArrayInputStream(xml.getBytes())) );
}
}