org.primefaces.util.TreeUtils Maven / Gradle / Ivy
/*
* Copyright 2009-2014 PrimeTek.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.primefaces.util;
import java.util.Arrays;
import java.util.Comparator;
import org.primefaces.model.TreeNode;
import org.primefaces.model.TreeNodeList;
/**
* Utilities for Tree components.
*/
public class TreeUtils {
/**
* Sorts children of a node using a comparator
*
* @param node Node instance whose children to be sorted
* @param comparator Comparator to use in sorting
*/
public static void sortNode(TreeNode node, Comparator comparator) {
TreeNodeList children = (TreeNodeList) node.getChildren();
if(children != null && !children.isEmpty()) {
Object[] childrenArray = children.toArray();
Arrays.sort(childrenArray, comparator);
for(int i = 0; i < childrenArray.length; i++) {
children.setSibling(i, (TreeNode) childrenArray[i]);
}
for(int i = 0; i < children.size(); i++) {
sortNode(children.get(i), comparator);
}
}
}
}