franta-hg@63: /**
franta-hg@63:  * Alt2XML
franta-hg@63:  * Copyright © 2014 František Kučera (frantovo.cz)
franta-hg@63:  *
franta-hg@63:  * This program is free software: you can redistribute it and/or modify
franta-hg@63:  * it under the terms of the GNU General Public License as published by
franta-hg@111:  * the Free Software Foundation, version 3 of the License.
franta-hg@63:  *
franta-hg@63:  * This program is distributed in the hope that it will be useful,
franta-hg@63:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
franta-hg@63:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
franta-hg@63:  * GNU General Public License for more details.
franta-hg@63:  *
franta-hg@63:  * You should have received a copy of the GNU General Public License
franta-hg@63:  * along with this program. If not, see <http://www.gnu.org/licenses/>.
franta-hg@63:  */
franta-hg@63: package cz.frantovo.alt2xml.out;
franta-hg@63: 
franta-hg@63: import javax.xml.parsers.SAXParser;
franta-hg@63: import javax.xml.transform.Transformer;
franta-hg@63: import javax.xml.transform.TransformerException;
franta-hg@63: import javax.xml.transform.TransformerFactory;
franta-hg@63: import javax.xml.transform.TransformerFactoryConfigurationError;
franta-hg@63: import javax.xml.transform.dom.DOMResult;
franta-hg@63: import javax.xml.transform.sax.SAXSource;
franta-hg@63: import org.xml.sax.InputSource;
franta-hg@63: import org.xml.sax.SAXException;
franta-hg@63: 
franta-hg@63: /**
franta-hg@63:  * Recommended base class for Actions based on DOM processing.
franta-hg@63:  * This actiond does not support streaming – whole document must be parsed/converted to DOM and
franta-hg@63:  * after that the action is executed.
franta-hg@63:  *
franta-hg@63:  * @author Ing. František Kučera (frantovo.cz)
franta-hg@63:  */
franta-hg@63: public abstract class AbstractDOMAction extends AbstractAction {
franta-hg@63: 
franta-hg@63: 	public AbstractDOMAction(ActionContext actionContext) {
franta-hg@63: 		super(actionContext);
franta-hg@63: 	}
franta-hg@63: 
franta-hg@63: 	@Override
franta-hg@63: 	public void run(SAXParser parser, InputSource source) throws OutputActionException {
franta-hg@63: 
franta-hg@63: 		try {
franta-hg@63: 			TransformerFactory tf = TransformerFactory.newInstance();
franta-hg@63: 			Transformer t = tf.newTransformer();
franta-hg@63: 
franta-hg@63: 			DOMResult domResult = new DOMResult();
franta-hg@63: 
franta-hg@63: 			t.transform(new SAXSource(parser.getXMLReader(), source), domResult);
franta-hg@63: 
franta-hg@63: 			run(domResult);
franta-hg@63: 
franta-hg@63: 		} catch (SAXException e) {
franta-hg@63: 			throw new OutputActionException("Unable to get SAX reader during SAX→DOM conversion.", e);
franta-hg@63: 		} catch (TransformerException | TransformerFactoryConfigurationError e) {
franta-hg@63: 			throw new OutputActionException("Unable to convert SAX events to DOM using XSLT.", e);
franta-hg@63: 		}
franta-hg@63: 	}
franta-hg@63: 
franta-hg@63: 	protected abstract void run(DOMResult domResult) throws OutputActionException;
franta-hg@63: 
franta-hg@63: }