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.monitor;
019    
020    import java.io.File;
021    
022    /**
023     * A listener that receives events of filesystem modifications.
024     * The observer basically represents the source of the events.
025     * The file root and its state. (see FilesystemAlterationObserver)
026     * 
027     * @author tcurdt
028     */
029    public interface FilesystemAlterationListener {
030    
031        void onStart( final FilesystemAlterationObserver pObserver );
032        void onFileCreate( final File pFile );
033        void onFileChange( final File pFile );
034        void onFileDelete( final File pFile );
035        void onDirectoryCreate( final File pDir );
036        void onDirectoryChange( final File pDir );
037        void onDirectoryDelete( final File pDir );
038        void onStop( final FilesystemAlterationObserver pObserver );
039    }