/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.io.monitor;
import java.io.File;

/**
 * A listener that receives events of file system modifications.
 * 

* Register {@link FileAlterationListener}s with a {@link FileAlterationObserver}. * * @see FileAlterationObserver * @version $Id$ * @since 2.0 */ public interface FileAlterationListener { /** * File system observer started checking event. * * @param observer The file system observer */ void onStart(final FileAlterationObserver observer); /** * Directory created Event. * * @param directory The directory created */ void onDirectoryCreate(final File directory); /** * Directory changed Event. * * @param directory The directory changed */ void onDirectoryChange(final File directory); /** * Directory deleted Event. * * @param directory The directory deleted */ void onDirectoryDelete(final File directory); /** * File created Event. * * @param file The file created */ void onFileCreate(final File file); /** * File changed Event. * * @param file The file changed */ void onFileChange(final File file); /** * File deleted Event. * * @param file The file deleted */ void onFileDelete(final File file); /** * File system observer finished checking event. * * @param observer The file system observer */ void onStop(final FileAlterationObserver observer); }