Java tutorial
/** * This file is part of mycollab-core. * * mycollab-core 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, either version 3 of the License, or * (at your option) any later version. * * mycollab-core 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 mycollab-core. If not, see <http://www.gnu.org/licenses/>. */ package com.esofthead.mycollab.core.utils; import com.esofthead.mycollab.core.MyCollabException; import org.apache.commons.beanutils.PropertyUtils; import java.util.ArrayList; import java.util.List; /** * @author MyCollab Ltd * @since 5.0.9 */ public class ArrayUtils { public static <T> boolean isNotEmpty(T[] array) { return array != null && array.length != 0; } public static List<Integer> extractIds(List items) { try { List<Integer> keys = new ArrayList<>(items.size()); for (Object item : items) { Integer key = (Integer) PropertyUtils.getProperty(item, "id"); keys.add(key); } return keys; } catch (Exception e) { throw new MyCollabException(e); } } }