1 /** 2 * This file Copyright (c) 2015 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.resourceloader.util; 35 36 import com.google.common.base.Function; 37 38 /** 39 * Convenient abstract class that implements a {@link Function} whose target type is Void, e.g avoids having to declare 40 * the Void type parameter having to explicitly return null in implements. 41 * 42 * @param <T> the argument type for the function 43 * @see info.magnolia.resourceloader.ResourceOrigin#traverseWith(info.magnolia.resourceloader.ResourceVisitor) 44 * @see info.magnolia.resourceloader.ResourceOrigin#watchForChanges(info.magnolia.resourceloader.ResourceVisitor) 45 */ 46 public abstract class VoidFunction<T> implements Function<T, Void> { 47 @Override 48 public final Void apply(T input) { 49 doWith(input); 50 return null; 51 } 52 53 public abstract void doWith(T input); 54 55 }