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 019package org.apache.commons.compress.archivers; 020 021import java.io.BufferedInputStream; 022import java.io.File; 023import java.io.FileInputStream; 024import 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 recognized.</p> 031 * 032 * @since 1.1 033 */ 034public final class Lister { 035 private static final ArchiveStreamFactory factory = new ArchiveStreamFactory(); 036 037 public static void main(final String[] args) throws Exception { 038 if (args.length == 0) { 039 usage(); 040 return; 041 } 042 System.out.println("Analysing " + args[0]); 043 final File f = new File(args[0]); 044 if (!f.isFile()) { 045 System.err.println(f + " doesn't exist or is a directory"); 046 } 047 try (final InputStream fis = new BufferedInputStream(new FileInputStream(f)); 048 final ArchiveInputStream ais = createArchiveInputStream(args, fis)) { 049 System.out.println("Created " + ais.toString()); 050 ArchiveEntry ae; 051 while ((ae = ais.getNextEntry()) != null) { 052 System.out.println(ae.getName()); 053 } 054 } 055 } 056 057 private static ArchiveInputStream createArchiveInputStream(final String[] args, final InputStream fis) 058 throws ArchiveException { 059 if (args.length > 1) { 060 return factory.createArchiveInputStream(args[1], fis); 061 } 062 return factory.createArchiveInputStream(fis); 063 } 064 065 private static void usage() { 066 System.out.println("Parameters: archive-name [archive-type]"); 067 } 068 069}