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.file; 35 36 import info.magnolia.dirwatch.WatcherCallback; 37 import info.magnolia.resourceloader.Resource; 38 39 import java.nio.file.Files; 40 import java.nio.file.Path; 41 42 import com.google.common.base.Function; 43 import com.google.common.base.Predicate; 44 45 /** 46 * A {@link WatcherCallback} which delegates all file events to a callback {@link Function}. 47 */ 48 class FileWatcherCallback implements WatcherCallback { 49 private final FileSystemResourceOrigin origin; 50 private final Predicate<Path> filterPredicate; 51 private final Function<Resource, Void> func; 52 53 FileWatcherCallback(FileSystemResourceOrigin origin, Predicate<Path> filterPredicate, Function<Resource, Void> func) { 54 this.origin = origin; 55 this.filterPredicate = filterPredicate; 56 this.func = func; 57 } 58 59 @Override 60 public void added(Path p) { 61 doIt(p); 62 } 63 64 @Override 65 public void modified(Path p) { 66 doIt(p); 67 } 68 69 @Override 70 public void removed(Path p) { 71 // TODO should probably fire typed event so that source has a chance to unregister instead of just reloading 72 doIt(p); 73 } 74 75 protected void doIt(Path completePath) { 76 // DirectoryWatcher fires callbacks with absolute path, no need for extra check 77 if (Files.isRegularFile(completePath) && filterPredicate.apply(completePath)) { 78 func.apply(origin.newResource(completePath)); 79 } 80 } 81 82 }