| /* |
| * 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.vfs2.example; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.nio.charset.Charset; |
| import java.text.DateFormat; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Date; |
| import java.util.List; |
| import java.util.StringTokenizer; |
| |
| import org.apache.commons.vfs2.Capability; |
| import org.apache.commons.vfs2.FileContent; |
| import org.apache.commons.vfs2.FileObject; |
| import org.apache.commons.vfs2.FileSystemException; |
| import org.apache.commons.vfs2.FileSystemManager; |
| import org.apache.commons.vfs2.FileType; |
| import org.apache.commons.vfs2.FileUtil; |
| import org.apache.commons.vfs2.Selectors; |
| import org.apache.commons.vfs2.VFS; |
| import org.apache.commons.vfs2.operations.FileOperationProvider; |
| |
| /** |
| * A simple command-line shell for performing file operations. |
| * <p> |
| * See |
| * <a href="https://wiki.apache.org/commons/VfsExampleShell">Commons VFS Shell Examples</a> |
| * in Apache Commons Wiki. |
| */ |
| public final class Shell |
| { |
| private final FileSystemManager mgr; |
| private FileObject cwd; |
| private final BufferedReader reader; |
| |
| private Shell() throws IOException |
| { |
| mgr = VFS.getManager(); |
| cwd = mgr.toFileObject(new File(System.getProperty("user.dir"))); |
| reader = new BufferedReader(new InputStreamReader(System.in, Charset.defaultCharset())); |
| } |
| |
| public static void main(final String[] args) |
| { |
| try |
| { |
| new Shell().go(); |
| } |
| catch (final Exception e) |
| { |
| e.printStackTrace(); |
| System.exit(1); |
| } |
| System.exit(0); |
| } |
| |
| private void go() throws Exception |
| { |
| System.out.println("VFS Shell " + getVersion(Shell.class)); |
| while (true) |
| { |
| final String[] cmd = nextCommand(); |
| if (cmd == null) |
| { |
| return; |
| } |
| if (cmd.length == 0) |
| { |
| continue; |
| } |
| final String cmdName = cmd[0]; |
| if (cmdName.equalsIgnoreCase("exit") || cmdName.equalsIgnoreCase("quit")) |
| { |
| return; |
| } |
| try |
| { |
| handleCommand(cmd); |
| } |
| catch (final Exception e) |
| { |
| System.err.println("Command failed:"); |
| e.printStackTrace(System.err); |
| } |
| } |
| } |
| |
| /** |
| * Handles a command. |
| */ |
| private void handleCommand(final String[] cmd) throws Exception |
| { |
| final String cmdName = cmd[0]; |
| if (cmdName.equalsIgnoreCase("cat")) |
| { |
| cat(cmd); |
| } |
| else if (cmdName.equalsIgnoreCase("cd")) |
| { |
| cd(cmd); |
| } |
| else if (cmdName.equalsIgnoreCase("cp")) |
| { |
| cp(cmd); |
| } |
| else if (cmdName.equalsIgnoreCase("help") || cmdName.equals("?")) |
| { |
| help(); |
| } |
| else if (cmdName.equalsIgnoreCase("ls")) |
| { |
| ls(cmd); |
| } |
| else if (cmdName.equalsIgnoreCase("pwd")) |
| { |
| pwd(); |
| } |
| else if (cmdName.equalsIgnoreCase("rm")) |
| { |
| rm(cmd); |
| } |
| else if (cmdName.equalsIgnoreCase("touch")) |
| { |
| touch(cmd); |
| } |
| else if (cmdName.equalsIgnoreCase("info")) |
| { |
| info(cmd); |
| } |
| else |
| { |
| System.err.println("Unknown command \"" + cmdName + "\" (Try 'help')."); |
| } |
| } |
| |
| private void info(String[] cmd) throws Exception |
| { |
| if (cmd.length > 1) |
| { |
| info(cmd[1]); |
| } |
| else |
| { |
| System.out.println("Default manager: \"" + mgr.getClass().getName() + "\" " + |
| "version " + getVersion(mgr.getClass())); |
| String[] schemes = mgr.getSchemes(); |
| List<String> virtual = new ArrayList<String>(); |
| List<String> physical = new ArrayList<String>(); |
| for (int i = 0; i < schemes.length; i++) |
| { |
| Collection<Capability> caps = mgr.getProviderCapabilities(schemes[i]); |
| if (caps != null) |
| { |
| if (caps.contains(Capability.VIRTUAL) || |
| caps.contains(Capability.COMPRESS) || |
| caps.contains(Capability.DISPATCHER)) |
| { |
| virtual.add(schemes[i]); |
| } |
| else |
| { |
| physical.add(schemes[i]); |
| } |
| } |
| } |
| if (!physical.isEmpty()) |
| { |
| System.out.println(" Provider Schemes: " + physical); |
| } |
| if (!virtual.isEmpty()) |
| { |
| System.out.println(" Virtual Schemes: " + virtual); |
| } |
| } |
| } |
| |
| private void info(String scheme) throws Exception |
| { |
| System.out.println("Provider Info for scheme \"" + scheme + "\":"); |
| Collection<Capability> caps; |
| caps = mgr.getProviderCapabilities(scheme); |
| if (caps != null && !caps.isEmpty()) |
| { |
| System.out.println(" capabilities: " + caps); |
| } |
| FileOperationProvider[] ops = mgr.getOperationProviders(scheme); |
| if (ops != null && ops.length > 0) |
| { |
| System.out.println(" operations: " + ops); |
| } |
| } |
| |
| /** |
| * Does a 'help' command. |
| */ |
| private void help() |
| { |
| System.out.println("Commands:"); |
| System.out.println("cat <file> Displays the contents of a file."); |
| System.out.println("cd [folder] Changes current folder."); |
| System.out.println("cp <src> <dest> Copies a file or folder."); |
| System.out.println("help Shows this message."); |
| System.out.println("info [scheme] Displays information about providers."); |
| System.out.println("ls [-R] [path] Lists contents of a file or folder."); |
| System.out.println("pwd Displays current folder."); |
| System.out.println("rm <path> Deletes a file or folder."); |
| System.out.println("touch <path> Sets the last-modified time of a file."); |
| System.out.println("exit, quit Exits this program."); |
| } |
| |
| /** |
| * Does an 'rm' command. |
| */ |
| private void rm(final String[] cmd) throws Exception |
| { |
| if (cmd.length < 2) |
| { |
| throw new Exception("USAGE: rm <path>"); |
| } |
| |
| final FileObject file = mgr.resolveFile(cwd, cmd[1]); |
| file.delete(Selectors.SELECT_SELF); |
| } |
| |
| /** |
| * Does a 'cp' command. |
| */ |
| private void cp(final String[] cmd) throws Exception |
| { |
| if (cmd.length < 3) |
| { |
| throw new Exception("USAGE: cp <src> <dest>"); |
| } |
| |
| final FileObject src = mgr.resolveFile(cwd, cmd[1]); |
| FileObject dest = mgr.resolveFile(cwd, cmd[2]); |
| if (dest.exists() && dest.getType() == FileType.FOLDER) |
| { |
| dest = dest.resolveFile(src.getName().getBaseName()); |
| } |
| |
| dest.copyFrom(src, Selectors.SELECT_ALL); |
| } |
| |
| /** |
| * Does a 'cat' command. |
| */ |
| private void cat(final String[] cmd) throws Exception |
| { |
| if (cmd.length < 2) |
| { |
| throw new Exception("USAGE: cat <path>"); |
| } |
| |
| // Locate the file |
| final FileObject file = mgr.resolveFile(cwd, cmd[1]); |
| |
| // Dump the contents to System.out |
| FileUtil.writeContent(file, System.out); |
| System.out.println(); |
| } |
| |
| /** |
| * Does a 'pwd' command. |
| */ |
| private void pwd() |
| { |
| System.out.println("Current folder is " + cwd.getName()); |
| } |
| |
| /** |
| * Does a 'cd' command. |
| * If the taget directory does not exist, a message is printed to <code>System.err</code>. |
| */ |
| private void cd(final String[] cmd) throws Exception |
| { |
| final String path; |
| if (cmd.length > 1) |
| { |
| path = cmd[1]; |
| } |
| else |
| { |
| path = System.getProperty("user.home"); |
| } |
| |
| // Locate and validate the folder |
| final FileObject tmp = mgr.resolveFile(cwd, path); |
| if (tmp.exists()) |
| { |
| cwd = tmp; |
| } |
| else |
| { |
| System.out.println("Folder does not exist: " + tmp.getName()); |
| } |
| System.out.println("Current folder is " + cwd.getName()); |
| } |
| |
| /** |
| * Does an 'ls' command. |
| */ |
| private void ls(final String[] cmd) throws FileSystemException |
| { |
| int pos = 1; |
| final boolean recursive; |
| if (cmd.length > pos && cmd[pos].equals("-R")) |
| { |
| recursive = true; |
| pos++; |
| } |
| else |
| { |
| recursive = false; |
| } |
| |
| final FileObject file; |
| if (cmd.length > pos) |
| { |
| file = mgr.resolveFile(cwd, cmd[pos]); |
| } |
| else |
| { |
| file = cwd; |
| } |
| |
| if (file.getType() == FileType.FOLDER) |
| { |
| // List the contents |
| System.out.println("Contents of " + file.getName()); |
| listChildren(file, recursive, ""); |
| } |
| else |
| { |
| // Stat the file |
| System.out.println(file.getName()); |
| final FileContent content = file.getContent(); |
| System.out.println("Size: " + content.getSize() + " bytes."); |
| final DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.MEDIUM); |
| final String lastMod = dateFormat.format(new Date(content.getLastModifiedTime())); |
| System.out.println("Last modified: " + lastMod); |
| } |
| } |
| |
| /** |
| * Does a 'touch' command. |
| */ |
| private void touch(final String[] cmd) throws Exception |
| { |
| if (cmd.length < 2) |
| { |
| throw new Exception("USAGE: touch <path>"); |
| } |
| final FileObject file = mgr.resolveFile(cwd, cmd[1]); |
| if (!file.exists()) |
| { |
| file.createFile(); |
| } |
| file.getContent().setLastModifiedTime(System.currentTimeMillis()); |
| } |
| |
| /** |
| * Lists the children of a folder. |
| */ |
| private void listChildren(final FileObject dir, |
| final boolean recursive, |
| final String prefix) |
| throws FileSystemException |
| { |
| final FileObject[] children = dir.getChildren(); |
| for (final FileObject child : children) |
| { |
| System.out.print(prefix); |
| System.out.print(child.getName().getBaseName()); |
| if (child.getType() == FileType.FOLDER) |
| { |
| System.out.println("/"); |
| if (recursive) |
| { |
| listChildren(child, recursive, prefix + " "); |
| } |
| } |
| else |
| { |
| System.out.println(); |
| } |
| } |
| } |
| |
| /** |
| * Returns the next command, split into tokens. |
| */ |
| private String[] nextCommand() throws IOException |
| { |
| System.out.print("> "); |
| final String line = reader.readLine(); |
| if (line == null) |
| { |
| return null; |
| } |
| final ArrayList<String> cmd = new ArrayList<String>(); |
| final StringTokenizer tokens = new StringTokenizer(line); |
| while (tokens.hasMoreTokens()) |
| { |
| cmd.add(tokens.nextToken()); |
| } |
| return cmd.toArray(new String[cmd.size()]); |
| } |
| |
| private static String getVersion(Class<?> cls) |
| { |
| try |
| { |
| return cls.getPackage().getImplementationVersion(); |
| } |
| catch (Exception ignored) |
| { |
| return "N/A"; |
| } |
| } |
| } |