EDIT

/**

* Copyright (C) 2009 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.jaxb;

import java.io.StringReader;

import java.io.StringWriter;

import javax.xml.bind.annotation.adapters.XmlAdapter;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.transform.OutputKeys;

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.stream.StreamResult;

import org.apache.commons.text.StringEscapeUtils;

import org.apache.logging.log4j.LogManager;

import org.apache.logging.log4j.Logger;

import org.w3c.dom.DOMException;

import org.w3c.dom.Document;

import org.w3c.dom.DocumentFragment;

import org.w3c.dom.NamedNodeMap;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xml.sax.InputSource;

public class FormattedTextAdapter extends XmlAdapter<FormattedText,java.lang.String> {

	public static String[] NAMESPACE_PREFIXES = {"xmlns:common",

		                                         "xmlns:agent",

		                                         "xmlns:description",

		                                         "xmlns:location",

		                                         "xmlns:media",

		                                         "xmlns:molecular",

		                                         "xmlns:name",

		                                         "xmlns:occurence",

		                                         "xmlns:reference",

		                                         "xmlns:taxon",

		                                         "xmlns:view",

		                                         "xmlns:xsi"};

	@SuppressWarnings("unused")

	private static final Logger logger = LogManager.getLogger();

	@Override

    public FormattedText marshal(String string) throws Exception {

		if(string != null) {

			string = StringEscapeUtils .escapeXml11(string);

			String documentString = "<?xml version=\"1.0\"?><text>"  + string + "</text>";

			//log.debug("Parsing " + documentString);

			FormattedText text = new FormattedText();

		    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

		    DocumentBuilder parser = factory.newDocumentBuilder();

		    Document document = parser.parse(new InputSource(new StringReader(documentString)));

		    NodeList childNodes = document.getDocumentElement().getChildNodes();

		    for(int i = 0; i < childNodes.getLength(); i++) {

		    	Node node = childNodes.item(i);

		    	if(node instanceof org.w3c.dom.Text ) {

		    		org.w3c.dom.Text textNode = (org.w3c.dom.Text) node;

		    		text.getContent().add(textNode.getTextContent());

		    	} else {

		    	    text.getContent().add(node);

		    	}

		    }

		    return text;

		}

		return null;

	}

	@Override

    public String unmarshal(FormattedText text) throws Exception {

		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

		Document document = factory.newDocumentBuilder().newDocument();

		DocumentFragment documentFragment = document.createDocumentFragment();

		for(Object object : text.getContent()) {

			if(object instanceof String) {

				String string = (String)object;

				documentFragment.appendChild(document.createTextNode(string));

			} else {

				Node node = (Node)object;

				NamedNodeMap attributes = node.getAttributes();

				for(String prefix : FormattedTextAdapter.NAMESPACE_PREFIXES) {

					try{

						attributes.removeNamedItem(prefix);

					} catch(DOMException de){

						if(de.code != DOMException.NOT_FOUND_ERR) {

							throw de;

						}

					}

				}

				documentFragment.appendChild(document.importNode(node,true));

			}

		}

		TransformerFactory transformerFactory  = TransformerFactory.newInstance();

		Transformer transformer = transformerFactory.newTransformer();

		transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION , "yes");

		Source input = new DOMSource(documentFragment);

		StringWriter stringWriter = new StringWriter();

		Result output = new StreamResult(stringWriter);

		transformer.transform(input, output);

		String result = stringWriter.toString();

		result = StringEscapeUtils.unescapeXml(result);

		return result;

	}

}