Mercurial > jhg
view src/org/tmatesoft/hg/internal/FileChangeMonitor.java @ 611:7fc7fba4df30
Tests for tailored sections in HgRepoConfig
author | Artem Tikhomirov <tikhomirov.artem@gmail.com> |
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date | Thu, 09 May 2013 21:52:01 +0200 |
parents | 5c68567b3645 |
children |
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/* * Copyright (c) 2013 TMate Software Ltd * * This program 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; version 2 of the License. * * This program 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. * * For information on how to redistribute this software under * the terms of a license other than GNU General Public License * contact TMate Software at support@hg4j.com */ package org.tmatesoft.hg.internal; import java.io.File; /** * This shall become interface/abstract class accessible from SessionContext, * with plugable implementations, e.g. Java7 (file monitoring facilities) based, * or any other convenient means. It shall allow both "check at the moment asked" * and "collect changes and dispatch on demand" implementation approaches, so that * implementors may use best available technology * * @author Artem Tikhomirov * @author TMate Software Ltd. */ public class FileChangeMonitor { private final File file; private long lastModified; private long length; /** * First round: support for 1-monitor-1-file only * Next round: 1-monitor-N files */ public FileChangeMonitor(File f) { file = f; } // shall work for files that do not exist public void touch(Object source) { lastModified = file.lastModified(); length = file.length(); } public void check(Object source, Action onChange) { if (changed(source)) { onChange.changed(); } } public boolean changed(Object source) { if (file.lastModified() != lastModified) { return true; } return file.length() != length; } public interface Action { public void changed(); } }