/**
* OLAT - Online Learning and Training<br>
* http://www.olat.org
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Copyright (c) since 2004 at Multimedia- & E-Learning Services (MELS),<br>
* University of Zurich, Switzerland.
* <p>
*/
package org.olat.ims.qti.editor.beecom.parser;
import java.util.List;
import org.dom4j.Element;
import org.olat.core.logging.OLATRuntimeException;
import org.olat.ims.qti.editor.beecom.objects.SelectionOrdering;
/**
* Initial Date: Sep 23, 2003
*
* @author gnaegi<br>
*
* Comment: Parser for the selection_ordering elements (at section level).
* Uses the number of choosen items from the selection_number element if available
* and the ordering type from the order element. Uses default values from the
* SelectionOrdering class in cases of non exising elements
* </pre>
*/
public class SelectionOrderingParser implements IParser {
/**
* @see org.olat.ims.qti.editor.beecom.IParser#parse(org.dom4j.Element)
*/
public Object parse(Element element) {
//assert element.getName().equalsIgnoreCase("selection_ordering");
SelectionOrdering selectionOrdering = new SelectionOrdering();
// Set correct selection of items. To select all is the default value (represented
// by a non existing 'selection_number' element. Otherwhise the exact number given
// in the 'selection_number' element is taken')
List el_selections = element.selectNodes("selection");
if(el_selections.size()>1){
//error
throw new OLATRuntimeException(SelectionOrderingParser.class, "more then one selection element", new IllegalStateException());
}
if (el_selections.size() != 0){
Element el_selection = ((Element)el_selections.get(0));
Element selection_number = (Element)el_selection.selectSingleNode("selection_number");
if (selection_number != null) selectionOrdering.setSelectionNumber(Integer.parseInt(selection_number.getText()));
}
// else use default value
// Set correct order type. Use sequential ordering als default if none defined
Element order = (Element)element.selectSingleNode("//order");
if (order != null) {
String order_type = order.attributeValue(SelectionOrdering.ORDER_TYPE);
if (order_type != null && order_type.equals(SelectionOrdering.RANDOM)) selectionOrdering.setOrderType(SelectionOrdering.RANDOM);
// else use default value
}
return selectionOrdering;
}
}