DOMElementProprtyEditor.java

/*
 * Copyright (c) 2012-2014, Parallel Universe Software Co. All rights reserved.
 * 
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *  
 *   or (per the licensee's choosing)
 *  
 * under the terms of the GNU Lesser General Public License version 3.0
 * as published by the Free Software Foundation.
 */
package co.paralleluniverse.common.util;

import java.beans.PropertyEditorSupport;
import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.InputSource;

/**
 *
 * @author pron
 */
public class DOMElementProprtyEditor extends PropertyEditorSupport {
    private final DocumentBuilder docBuilder;

    public DOMElementProprtyEditor() throws Exception {
        docBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
    }

    @Override
    public void setAsText(String text) throws IllegalArgumentException {
        try {
            final Document doc = docBuilder.parse(new InputSource(new StringReader(text)));
            final Element element = doc.getDocumentElement();
            setValue(element);
        } catch (Exception ex) {
            throw new IllegalArgumentException(ex);
        }
    }

    @Override
    public String getAsText() {
        try {
            final Node node = (Node) getValue();
            Source source = new DOMSource(node);
            StringWriter stringWriter = new StringWriter();
            Result result = new StreamResult(stringWriter);
            TransformerFactory factory = TransformerFactory.newInstance();
            Transformer transformer = factory.newTransformer();
            transformer.transform(source, result);
            return stringWriter.getBuffer().toString();
        } catch (TransformerConfigurationException e) {
            e.printStackTrace();
        } catch (TransformerException e) {
            e.printStackTrace();
        }
        return null;
    }
}