/**

  * 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.xpath;

 import java.util.Iterator;

 import javax.xml.XMLConstants;

 import javax.xml.namespace.NamespaceContext;

 import org.w3c.dom.Node;

 /**

  *

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

  */

 public class DocumentNamespaceContext implements NamespaceContext {

 	private final Node document;

 	public DocumentNamespaceContext(Node document) {

 		this.document = document;

 	}

 	@Override

 	public String getNamespaceURI(String prefix) {

 		if (prefix.equals(XMLConstants.DEFAULT_NS_PREFIX)) {

 			return document.lookupNamespaceURI(null);

 		} else {

 			return document.lookupNamespaceURI(prefix);

 		}

 	}

 	@Override

 	public String getPrefix(String xmlns) {

 		return document.lookupPrefix(xmlns);

 	}

 	/**

 	 * TODO: support multiple prefixes

 	 */

 	@Override

 	public Iterator getPrefixes(String xmlns) {

 		return new OneItemIterator(getPrefix(xmlns));

 	}

 }