AbstractGlskDocumentImporter.java
/*
* Copyright (c) 2020, RTE (http://www.rte-france.com)
* 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/.
*/
package com.powsybl.glsk.api.io;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.io.InputStream;
/**
* @author Joris Mancini {@literal <joris.mancini at rte-france.com>}
*/
public abstract class AbstractGlskDocumentImporter {
private static final Logger LOGGER = LoggerFactory.getLogger(AbstractGlskDocumentImporter.class);
protected Document document;
protected boolean setDocument(InputStream inputStream) {
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
documentBuilderFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
documentBuilderFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, "");
documentBuilderFactory.setAttribute(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE);
documentBuilderFactory.setNamespaceAware(true);
try {
document = documentBuilderFactory.newDocumentBuilder().parse(inputStream);
} catch (ParserConfigurationException | SAXException | IOException e) {
LOGGER.warn("An exception occurred trying to read GLSK document. It could not be imported.");
document = null; // As something failed ensure document is null, in case import method is called afterwards
return false;
}
document.getDocumentElement().normalize();
return true;
}
}