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.IOException; 024import java.io.InputStream; 025import java.nio.file.Files; 026import org.apache.commons.compress.archivers.sevenz.SevenZFile; 027 028/** 029 * Simple command line application that lists the contents of an archive. 030 * 031 * <p>The name of the archive must be given as a command line argument.</p> 032 * <p>The optional second argument defines the archive type, in case the format is not recognized.</p> 033 * 034 * @since 1.1 035 */ 036public final class Lister { 037 private static final ArchiveStreamFactory factory = new ArchiveStreamFactory(); 038 039 public static void main(final String[] args) throws Exception { 040 if (args.length == 0) { 041 usage(); 042 return; 043 } 044 System.out.println("Analysing " + args[0]); 045 final File f = new File(args[0]); 046 if (!f.isFile()) { 047 System.err.println(f + " doesn't exist or is a directory"); 048 } 049 String format = args.length > 1 ? args[1] : detectFormat(f); 050 if (ArchiveStreamFactory.SEVEN_Z.equalsIgnoreCase(format)) { 051 list7z(f); 052 } else { 053 listStream(f, args); 054 } 055 } 056 057 private static void listStream(File f, String[] args) throws ArchiveException, IOException { 058 try (final InputStream fis = new BufferedInputStream(Files.newInputStream(f.toPath())); 059 final ArchiveInputStream ais = createArchiveInputStream(args, fis)) { 060 System.out.println("Created " + ais.toString()); 061 ArchiveEntry ae; 062 while ((ae = ais.getNextEntry()) != null) { 063 System.out.println(ae.getName()); 064 } 065 } 066 } 067 068 private static ArchiveInputStream createArchiveInputStream(final String[] args, final InputStream fis) 069 throws ArchiveException { 070 if (args.length > 1) { 071 return factory.createArchiveInputStream(args[1], fis); 072 } 073 return factory.createArchiveInputStream(fis); 074 } 075 076 private static String detectFormat(File f) throws ArchiveException, IOException { 077 try (final InputStream fis = new BufferedInputStream(Files.newInputStream(f.toPath()))) { 078 return factory.detect(fis); 079 } 080 } 081 082 private static void list7z(File f) throws ArchiveException, IOException { 083 try (SevenZFile z = new SevenZFile(f)) { 084 System.out.println("Created " + z.toString()); 085 ArchiveEntry ae; 086 while ((ae = z.getNextEntry()) != null) { 087 System.out.println(ae.getName()); 088 } 089 } 090 } 091 092 private static void usage() { 093 System.out.println("Parameters: archive-name [archive-type]"); 094 } 095 096}