/**
* <a href="http://www.openolat.org">
* OpenOLAT - Online Learning and Training</a><br>
* <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 the
* <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache homepage</a>
* <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>
* Initial code contributed and copyrighted by<br>
* frentix GmbH, http://www.frentix.com
* <p>
*/
package org.olat.modules.qpool.ui.admin;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.olat.core.CoreSpringFactory;
import org.olat.core.gui.components.tree.GenericTreeModel;
import org.olat.core.gui.components.tree.GenericTreeNode;
import org.olat.modules.qpool.QPoolService;
import org.olat.modules.qpool.TaxonomyLevel;
/**
*
* Initial date: 28.02.2013<br>
* @author srosse, stephane.rosse@frentix.com, http://www.frentix.com
*
*/
public class TaxonomyTreeModel extends GenericTreeModel {
private static final long serialVersionUID = 3032222581990406868L;
private final QPoolService qpoolService;
public static final String ROOT = "root";
public TaxonomyTreeModel(String rootLabel) {
qpoolService = CoreSpringFactory.getImpl(QPoolService.class);
buildTree(rootLabel);
}
private void buildTree(String rootLabel) {
GenericTreeNode rootNode = new GenericTreeNode(rootLabel, ROOT);
setRootNode(rootNode);
List<TaxonomyLevel> fields = qpoolService.getTaxonomyLevels();
Map<Long,GenericTreeNode> fieldKeyToNode = new HashMap<Long, GenericTreeNode>();
for(TaxonomyLevel field:fields) {
Long key = field.getKey();
GenericTreeNode node = fieldKeyToNode.get(key);
if(node == null) {
node = new GenericTreeNode(field.getField(), field);
fieldKeyToNode.put(key, node);
}
TaxonomyLevel parentField = field.getParentField();
if(parentField == null) {
//this is a root
rootNode.addChild(node);
} else {
Long parentKey = parentField.getKey();
GenericTreeNode parentNode = fieldKeyToNode.get(parentKey);
if(parentNode == null) {
parentNode = new GenericTreeNode(parentField.getField(), parentField);
fieldKeyToNode.put(parentKey, parentNode);
}
parentNode.addChild(node);
}
}
}
}