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    
019    package org.apache.commons.compress.archivers;
020    
021    import java.io.BufferedInputStream;
022    import java.io.File;
023    import java.io.FileInputStream;
024    import java.io.InputStream;
025    
026    /**
027     * Simple command line application that lists the contents of an archive.
028     *
029     * <p>The name of the archive must be given as a command line argument.</p>
030     * <p>The optional second argument defines the archive type, in case the format is not recognised.</p>
031     *
032     * @since 1.1
033     */
034    public final class Lister {
035        private static final ArchiveStreamFactory factory = new ArchiveStreamFactory();
036    
037        public static void main(String[] args) throws Exception {
038            if (args.length == 0) {
039                usage();
040                return;
041            }
042            System.out.println("Analysing "+args[0]);
043            File f = new File(args[0]);
044            if (!f.isFile()) {
045                System.err.println(f + " doesn't exist or is a directory");
046            }
047            InputStream fis = new BufferedInputStream(new FileInputStream(f));
048            ArchiveInputStream ais;
049            if (args.length > 1) {
050                ais = factory.createArchiveInputStream(args[1], fis);
051            } else {
052                ais = factory.createArchiveInputStream(fis);
053            }
054            System.out.println("Created "+ais.toString());
055            ArchiveEntry ae;
056            while((ae=ais.getNextEntry()) != null){
057                System.out.println(ae.getName());
058            }
059            ais.close();
060            fis.close();
061        }
062    
063        private static void usage() {
064            System.out.println("Parameters: archive-name [archive-type]");
065        }
066    
067    }