Slice a list
/** * Vosao CMS. Simple CMS for Google App Engine. * * Copyright (C) 2009-2010 Vosao development team. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * email: vosao.dev@gmail.com *///package org.vosao.utils; import java.util.ArrayList; import java.util.List; publicclass ListUtil { publicstaticinterface Filter<T> { publicboolean filter(T entity); } publicstatic <T> List<T> filter(List<T> list, Filter<T> filter) { List<T> result = new ArrayList<T>(); for (T entity : list) { if (filter.filter(entity)) { result.add(entity); } } return result; } publicstatic <T> List<T> slice(List<T> list, int index, int count) { List<T> result = new ArrayList<T>(); if (index >= 0 && index < list.size()) { int end = index + count < list.size() ? index + count : list.size(); for (int i = index; i < end; i++) { result.add(list.get(i)); } } return result; } } Related examples in the same category
