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Bonita Common is the useful layer common to bonita-client and bonita-server
There is a newer version: 10.2.0
/**
 * Copyright (C) 2019 Bonitasoft S.A.
 * Bonitasoft, 32 rue Gustave Eiffel - 38000 Grenoble
 * This library 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
 * version 2.1 of the License.
 * This library 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
 * program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301, USA.
 **/
package org.bonitasoft.engine.xml;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;

import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.xml.sax.SAXException;

/**
 * @author Matthieu Chaffotte
 * @author Celine Souchet
 */
public class DocumentManager {

    private DocumentManager() {
        // For Sonar
    }

    public static Document generateDocument(final String s)
            throws ParserConfigurationException, SAXException, IOException {
        final DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        try {
            documentBuilderFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, ""); // security-compliant
            documentBuilderFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, ""); // security-compliant
        } catch (IllegalArgumentException e) {
            //ignored, if not supported by the implementation
        }
        final DocumentBuilder builder = documentBuilderFactory.newDocumentBuilder();
        try (InputStream is = new ByteArrayInputStream(s.getBytes())) {
            return builder.parse(is, null);
        }
    }

    public static String getDocumentContent(final Document document)
            throws TransformerFactoryConfigurationError, TransformerException, IOException {
        final TransformerFactory transformerFactory = TransformerFactory.newInstance();
        try {
            transformerFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, ""); // security-compliant
            transformerFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET, ""); // security-compliant
        } catch (IllegalArgumentException e) {
            //ignored, if not supported by the implementation
        }
        final Transformer transformer = transformerFactory.newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        try (StringWriter writer = new StringWriter()) {
            final StreamResult result = new StreamResult(writer);
            final DOMSource source = new DOMSource(document);
            transformer.transform(source, result);
            return result.getWriter().toString();
        }
    }

}