/**

  * Alt2XML

  * Copyright © 2014 František Kučera (frantovo.cz)

  *

  * This program is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, version 3 of the License.

  *

  * This program 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 General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with this program. If not, see <http://www.gnu.org/licenses/>.

  */

 package cz.frantovo.alt2xml.out;

 import javax.xml.parsers.SAXParser;

 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.DOMResult;

 import javax.xml.transform.sax.SAXSource;

 import org.xml.sax.InputSource;

 import org.xml.sax.SAXException;

 /**

  * Recommended base class for Actions based on DOM processing.

  * This actiond does not support streaming – whole document must be parsed/converted to DOM and

  * after that the action is executed.

  *

  * @author Ing. František Kučera (frantovo.cz)

  */

 public abstract class AbstractDOMAction extends AbstractAction {

 	public AbstractDOMAction(ActionContext actionContext) {

 		super(actionContext);

 	}

 	@Override

 	public void run(SAXParser parser, InputSource source) throws OutputActionException {

 		try {

 			TransformerFactory tf = TransformerFactory.newInstance();

 			Transformer t = tf.newTransformer();

 			DOMResult domResult = new DOMResult();

 			t.transform(new SAXSource(parser.getXMLReader(), source), domResult);

 			run(domResult);

 		} catch (SAXException e) {

 			throw new OutputActionException("Unable to get SAX reader during SAX→DOM conversion.", e);

 		} catch (TransformerException | TransformerFactoryConfigurationError e) {

 			throw new OutputActionException("Unable to convert SAX events to DOM using XSLT.", e);

 		}

 	}

 	protected abstract void run(DOMResult domResult) throws OutputActionException;

 }