network.oxalis.vefa.peppol.security.xmldsig.DomUtils Maven / Gradle / Ivy

Go to download
/*
 * Copyright 2015-2017 Direktoratet for forvaltning og IKT
 *
 * This source code is subject to dual licensing:
 *
 *
 * Licensed under the EUPL, Version 1.1 or – as soon they
 * will be approved by the European Commission - subsequent
 * versions of the EUPL (the "Licence");
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 *
 * See the Licence for the specific language governing
 * permissions and limitations under the Licence.
 */

package network.oxalis.vefa.peppol.security.xmldsig;

import network.oxalis.vefa.peppol.common.util.ExceptionUtil;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.io.InputStream;

public class DomUtils {

    public static final DocumentBuilderFactory documentBuilderFactory;

    static {
        documentBuilderFactory = DocumentBuilderFactory.newInstance();
        documentBuilderFactory.setNamespaceAware(true);
        documentBuilderFactory.setXIncludeAware(false);
        documentBuilderFactory.setExpandEntityReferences(false);

        try {
            documentBuilderFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
            documentBuilderFactory.setFeature("http://xml.org/sax/features/external-general-entities", false);
            documentBuilderFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
            documentBuilderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
        } catch (ParserConfigurationException e) {
            throw new IllegalStateException(e.getMessage(), e);
        }
    }

    public static Document parse(InputStream inputStream)
            throws SAXException, IOException, ParserConfigurationException {
        return documentBuilderFactory.newDocumentBuilder().parse(inputStream);
    }

    public static DocumentBuilder newDocumentBuilder() {
        return ExceptionUtil.perform(IllegalStateException.class,
                documentBuilderFactory::newDocumentBuilder);
    }
}