    001    /*
    002     * Licensed to the Apache Software Foundation (ASF) under one or more
    003     * contributor license agreements.  See the NOTICE file distributed with
    004     * this work for additional information regarding copyright ownership.
    005     * The ASF licenses this file to You under the Apache License, Version 2.0
    006     * (the "License"); you may not use this file except in compliance with
    007     * the License.  You may obtain a copy of the License at
    008     *
    009     *      http://www.apache.org/licenses/LICENSE-2.0
    010     *
    011     * Unless required by applicable law or agreed to in writing, software
    012     * distributed under the License is distributed on an "AS IS" BASIS,
    013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014     * See the License for the specific language governing permissions and
    015     * limitations under the License.
    016     */
    017
    018    package org.apache.commons.jci.listeners;
    019
    020    import java.io.File;
    021
    022    import org.apache.commons.jci.monitor.FilesystemAlterationObserver;
    023
    024    /**
    025     * The most simple implemenation of an FilesystemAlterationListener.
    026     *
    027     * @author tcurdt
    028     */
    029    public class FileChangeListener extends AbstractFilesystemAlterationListener {
    030
    031        private boolean changed;
    032
    033        public boolean hasChanged() {
    034            return changed;
    035        }
    036
    037        @Override
    038        public void onStart( final FilesystemAlterationObserver pObserver ) {
    039            changed = false;
    040            super.onStart(pObserver);
    041        }
    042
    043        @Override
    044        public void onStop( final FilesystemAlterationObserver pObserver ) {
    045            super.onStop(pObserver);
    046        }
    047
    048
    049        @Override
    050        public void onFileChange( final File pFile ) {
    051            changed = true;
    052        }
    053
    054
    055        @Override
    056        public void onFileCreate( final File pFile ) {
    057            changed = true;
    058        }
    059
    060
    061        @Override
    062        public void onFileDelete( final File pFile ) {
    063            changed = true;
    064        }
    065
    066
    067        @Override
    068        public void onDirectoryChange( final File pDir ) {
    069        }
    070
    071        @Override
    072        public void onDirectoryCreate( final File pDir ) {
    073        }
    074
    075        @Override
    076        public void onDirectoryDelete( final File pDir ) {
    077        }
    078
    079    }