2 * This file is part of the Vamsas Client version 0.1.
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3 * Copyright 2009 by Jim Procter, Iain Milne, Pierre Marguerite,
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4 * Andrew Waterhouse and Dominik Lindner.
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6 * Earlier versions have also been incorporated into Jalview version 2.4
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7 * since 2008, and TOPALi version 2 since 2007.
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9 * The Vamsas Client is free software: you can redistribute it and/or modify
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10 * it under the terms of the GNU Lesser General Public License as published by
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11 * the Free Software Foundation, either version 3 of the License, or
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12 * (at your option) any later version.
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14 * The Vamsas Client is distributed in the hope that it will be useful,
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15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 * GNU Lesser General Public License for more details.
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19 * You should have received a copy of the GNU Lesser General Public License
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20 * along with the Vamsas Client. If not, see <http://www.gnu.org/licenses/>.
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22 package uk.ac.vamsas.client.simpleclient;
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25 * Element of the VamsasFileWatcherThread event generator chain. Keep a
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26 * reference to this element before adding it to the chain in order to control
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27 * the generation of events with halt and enable.
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29 * doWatch will do nothing if the element is not enabled.
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32 public class VamsasFileWatcherElement extends WatcherElement {
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33 VamsasFile watched = null;
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36 * create a new, enabled watch element
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39 * file being watched
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41 * handler to call on state change
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43 public VamsasFileWatcherElement(VamsasFile watcher, WatcherCallBack handler) {
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44 this(watcher, handler, true);
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47 protected void initWatch() {
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48 if (watched == null)
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50 watched.unLock(); // very very essential!
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51 watcher = new FileWatcher(watched.getVamsasFile());
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54 protected void endWatch() {
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55 // leaves watcher in state its in.
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59 * new watcher with flag to initially skip watching this sessionfile
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63 * @param enableWatching
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65 public VamsasFileWatcherElement(VamsasFile watcher, WatcherCallBack handler,
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66 boolean enableWatching) {
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68 this.watched = watcher;
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76 * @return the watched
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78 public VamsasFile getWatched() {
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82 protected String getSubject() {
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83 return watched.getVamsasFile().toString();
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